Answer:
Work done by the little rocket engine = 19.6 Joules.
Explanation:
We know that work = force x displacement.
Force = weight of rocket = 4.9 N
Displacement = 5 meter.
So work done by the little rocket engine = Weight of rocket x displacement.
Work done by the little rocket engine = 4.9 x 4 = 19.6 J
Work done by the little rocket engine = 19.6 Joules.
The motion of an orbiting satellite can be described by the same motion characteristic of any object in uniform circular motion. The centripetal force acting toward the center of the circle, in this case, is supplied by
Gravity. That's the only force between the two objects.
Which of the following describes an object in static equilibrium?
A.A platypus lies motionless on the sand.
B.A tuna speeds up from 2 m/s to 3 m/s
C.A dolphin jumps out of the water
D.A zebra shark swims at a constant speed of 8 m/s
A is the answer. If an object is at rest and is in a state of equilibrium, then we would say that the object is at static equilibrium. Static means stationary or at rest. A common physics lab is to hang an object by two or more strings and to measure the forces that are exerted at angles upon the object to support its weight.
Answer:
A). A platypus lies motionless on the sand.
Explanation:
As we know that equilibrium is defined as the system in the state of ZERO net force or zero acceleration condition.
So equilibrium is of two types
1) Static equilibrium : Here object will remain at rest and do not have any type of motion.
2) Dynamic equilibrium : Here object may move with constant speed in same direction so it will not have any acceleration.
So here
B.A tuna speeds up from 2 m/s to 3 m/s
C.A dolphin jumps out of the water
Not in equilibrium as speed is changing so acceleration is not zero
D.A zebra shark swims at a constant speed of 8 m/s
It is in dynamic equilibrium case where speed is constant
so correct answer will be
A.A platypus lies motionless on the sand.
A boat loaded with a barrel of water floats in a swimming pool. When the water in the barrel is poured overboard, the swimming pool level will _____.
Question 6 options:
fall
remain unchanged
rise
Answer: Remain unchanged
Explanation:
The boat with water barrel overboard floats in swimming pool when weight of the water displaced by the boat is equal to the buoyant force acting on the boat.
When the water in the barrel is poured overboard, the level of the swimming pool level would remain unchanged as the weight of the boat with the water and barrel would remain unchanged ( as the density and volume of the whole system remains same) and hence, the weight of the water (of the swimming pool) displaced by the boat would remain same.
A boat loaded with a barrel of water floats in a swimming pool. When the water in the barrel is poured overboard, the swimming pool level will remain unchanged.
When water is poured from the barrel in the boat into the pool, the swimming pool water level remains unchanged due to the principles of buoyancy and displacement.
The phenomenon in question is related to the principles of buoyancy and displacement. When the barrel of water is onboard the boat, the total weight of the water and the boat is what displaces the pool water, causing it to rise up to a certain level. When the water is poured overboard, it is still in the pool, but the boat now weighs less and displaces less water. However, since the water from the barrel is now directly part of the pool, it displaces the same volume that the boat was displacing when holding the barrel full of water.
Therefore, the overall level of the swimming pool water will remain unchanged.
1) A force of 157 N is applied to a box 25o above the horizontal. If it is applied over a distance of 14.5 m how much work is done?
2) Jamie decides to drop an egg that has a mass of 345 g off the top of a 8.2 m building. How fast will it be falling right before it hits the ground?
3) Snookie is riding in her little red wagon (total mass of 215 kg) at a constant speed of 9.5 m/s. All of a sudden a magenta lemur (19.7 kg) appears in her lap. How fast is the Snook-meister traveling now?
4) Police are investigating an accident. They know that Tom Brady was driving 20 m/s before being hit by Jay Z head on. Tom Brady’s car has a mass of 1100 kg and Jay Z’s has a mass of 1475 kg. They also know that the two cars stuck together and were traveling 7 m/s in the same direction as Jay Z was driving. The speed limit was 25 m/s, was Jay Z speeding?
5) A ball is being swung in a horizontal circle of radius .23 m at a rate of 7.8 m/s. If the ball has a mass of 0.63 kg, find the force of tension on the string.
#1
Work done is given by
[tex]W = F.d cos\theta[/tex]
here we know that
F = 157 N
d = 14.5
[tex]\theta = 25^0[/tex]
now from the above formula
[tex]W = (157)(14.5)cos25 = 2063.2 J[/tex]
#2
By energy conservation
Initial total potential energy of egg = final total kinetic energy of egg
[tex]mgh = \frac{1}{2}mv^2[/tex]
[tex]v = \sqrt{2gh}[/tex]
[tex]v = \sqrt{2(9.8)(8.2)}[/tex]
[tex]v = 12.7 m/s[/tex]
#3
By momentum conservation we know that
[tex]m_1v_1 = (m_1 + m_2)v[/tex]
[tex]215(9.5) = (215 + 19.7) v[/tex]
[tex] v = \frac{215 (9.5)}{215 + 19.7}[/tex]
[tex]v = 8.7 m/s[/tex]
#4
by momentum conservation we know that
[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v[/tex]
let direction of velocity of Jay Z car motion is positive direction
now we will say
[tex]1100(-20) + 1475v = (1100 + 1475)(7)[/tex]
[tex]1475 v = 2575(7) + 1100(20)[/tex]
[tex]v = 27.14 m/s[/tex]
Yes Jay Z is overspeeding as his speed is more than speed limit
#5
Tension force in the string will be centripetal force
so here we can say
[tex]T = \frac{mv^2}{R}[/tex]
here we know that
m = 0.63 kg
v = 7.8 m/s
R = 0.23 m
[tex]T = \frac{0.63 (7.8)^2}{0.23}[/tex]
[tex]T = 166.6 N[/tex]
One of the factors that determines the ? of a capacitor is the frequency measured in hertz.
Answer:
Reactance
Explanation:
In an AC circuit, the capacitive reactance of a capacitor is given by:
[tex]X_C = \frac{1}{2 \pi f C}[/tex]
where
f is the frequency of the AC current
C is the capacitance of the capacitor
The reactance of the capacitor tells somehow the "resistance" of the capacitor to the passage of current through it. In fact:
- When the frequency of the AC current is zero (this means, we are in regime of DC current), the reactance becomes infinite, and this is true because the capacitor does not let the current pass through it)
- When the frequency of the AC current tends to infinite, the reactance becomes zero, and this is true because in this case the current changes direction so fast that the capacitor has not enough time to "block" the current, so the current almost no feels the presence of the capacitor.
Physics student is dropped. If they reach the floor at a speed of 3.2 m/s, from what height did they fall?
Answer:
0.52 m
Explanation:
The motion of the studnet is an accelerated motion, with constant acceleration [tex]g=9.8 m/s^2[/tex] (acceleration of gravity) toward the ground. We can find the distance covered by the student (which is equal to the height from which he falls) by using the SUVAT equation:
[tex]v^2 -u^2 = 2ad[/tex]
where
v = 3.2 m/s is the final speed
u = 0 is the initial speed
a = 9.8 m/s^2 is the acceleration
d is the distance covered
By re-arranging the equation, we find:
[tex]d=\frac{v^2-u^2}{2a}=\frac{(3.2 m/s)^2-0}{2(9.8 m/s^2)}=0.52 m[/tex]
Final answer:
The student fell from a height of 0.52 meters.
Explanation:
To calculate the height from which the physics student fell, we can use the formula for free fall. The initial velocity is 0 m/s as the student is dropped. The final velocity is given as 3.2 m/s. We can use the equation v² = u² + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity (approximately 9.8 m/s²), and s is the height. Rearranging the equation to solve for s, we get s = (v² - u²) / (2a). Plugging in the values, s = (3.2² - 0) / (2 * 9.8) = 0.52 meters. Therefore, the student fell from a height of 0.52 meters.
If an atom has two electrons outside of its nucleus, what number of protons and neutrons must be contained in the nucleus to result in a neutral atom
A neutral atom must contain an equal number of protons and electrons. To have a neutral charge with two electrons, an atom would need two protons — as such, it is likely a helium atom. The number of neutrons doesn't affect the charge and can vary.
Explanation:Your question involves understanding the structure of an atom, particularly relating to its protons, neutrons, and electrons. An atom is made up of two sections: the nucleus, which consists of protons and neutrons, and a surrounding region that contains electrons. The number of both protons and electrons in an atom determines its atomic number, and this in turn identifies the element.
For an atom to be neutral, it should have an equal number of protons (positively charged particles) and electrons (negatively charged particles). So if an atom has two electrons outside its nucleus, it must contain two protons in its nucleus to be neutral. This corresponds with the element helium. The number of neutrons can vary without affecting the charge, so while the most common isotope of helium contains two neutrons, alternatives with one or no neutrons exist.
Learn more about Atomic Structure here:https://brainly.com/question/33054877
#SPJ3
PLEASE HELP!!!!
1. A motorcycle with a mass of 200 kg can accelerate from 0 to 30 m/s in 3 seconds.
A. Assuming all of the force generated by the engine goes into acceleration of the motorcycle, how much force is the engine producing? Show your work.
B. What would happen if the coefficient of friction between the tire and the pavement increased greatly? Explain what would happen, including whether the acceleration of the motorcycle would stay the same, increase, or decrease, and tell why you think this is.
Answer:
a. 2000 N
b. acceleration of the motorcycle would decrease
Explanation:
a. acceleration = (final speed - initial speed)/time
a = (30 - 0)/3 = 10 m/(s^2)
Force = mass * acceleration
F = 200 * 10 = 2000 N
b. If the the coefficient of friction between the tire and the pavement increased greatly, part of the force generated by the engine would go to overcome this friction, then the force that goes into acceleration of the motorcycle would be less than case a, as a consequence, its acceleration would decrease (mass remains the same).
A long distance running is running the 10000 m race. He runs the first 2000 m in 5 minutes, the next 5000 m in 14 minutes and the final 3000 meters in 7 minutes. What was the runner’s average speed?
A long distance runner is running the 10000 m race. He runs the first 2000 m in 5 minutes, the next 5000 m in 14 minutes and the final 3000 meters in 7 minutes so the runner’s average speed is 6.41 m/sec.
What is average speed?The average speed is the total distance travelled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction.
Divide the whole distance by the total time required for him to go from the starting point to the finishing point to solve this type of problem. The entire distance in this instance is ten thousand meters, and the total time is the sum of the timings that were stated (which is 26 minutes, or 1560 seconds). By dividing these two figures, the following is the average speed,
average speed = 1000÷1560
average speed = 6.41 m/sec
The runner’s average speed is 6.41 m/sec.
To learn more about average speed refer to the link:
brainly.com/question/12322912
#SPJ2
Please help on this one? The mass on the spring in this diagram is in harmonic motion between x = -5cm and x=5cm
c ... max speed zero accel
Answer:
A
Explanation:
Why isnt the atmosphere a closed system?
Gasses from the earth escape from higher realms of the atmosphere.
What is the acceleration of the 698 kg car that experiences a force of 2410 N?
A.) 0.290 m/s^2
B.) 3.92 m/s^2
C.) 3.45 m/s^2
D.) 0.360 m/s^2
Hey there!
If you're working with Newton's Laws / Acceleration, the formula would mostly like look like this
[tex]F= MA[/tex] or you could say → [tex]A = \frac{F}{M}[/tex]
While the [tex]F[/tex] variable represents [tex]net[/tex] [tex]forces[/tex] of your car and the [tex]m[/tex] represents the mass of the car [tex]mass[/tex]
Denominator: [tex]2,410[/tex]
Numerator: [tex]698[/tex]
Your equation: [tex]\frac{2410}{698}[/tex] ( if you simplify that ←) then you have found your result!
[tex]Answer: \boxed{C) 3.45 m/s^2}[/tex]
Good luck on your assignment and enjoy your day!
~[tex]LoveYourselfFirst:)[/tex]
A person behind a moving siren will interpret the frequency of the siren as being
A person that is standing behind a moving siren will interpret the frequency to be lower compared to the person that would be standing in front of it. This is because the sound is now moving away from the person behind the siren and at this point the sound is juts lingering but, still very low.
Answer: Smaller than it actually is.
Explanation:
The person is behind the moving siren, and in this case, we assume that the siren is moving away from the man. By the Doppler effect, we know that a wave that comes from a source that is moving away will suffer a "redshift", which means that the wavelength increases a little bit, now, as you may know, the relation between the wavelength and the frequency comes by the equation:
velocity = wavelength/frequency.
If we keep the velocity constant (the velocity of the sound is the same independent of the frequency) then, if we have an increase in the wavelength, we must have a decrease in the frequency to maintain the velocity constant. From this, we can see that a redshift is also associated with a decrease in the frequency of the wave.
Then, the person behind the moving siren will interpret the frequency as being smaller than it actually is.
A cat chase a mouse across a 1.0 m high table. The mouse steps out of the way, and the car slides off the table and strikes the floor 2.2m from the edge of the table. When the car slid off the table what was it’s speed?
Answer is 4.9 m/s how do we get 4.9 m/s?
The cat fell 1.0 m from the ground.
Using the formula
[tex]h = v_{oy}t - \frac{gt^2}{2}[/tex]
Here, [tex]v_{oy} = 0, \; h = 1.0 \; m.[/tex]
Solving for t, the time it spent in the air is
[tex]t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2(1.0 \; m)}{9.8 \; m/s^2}} = 0.451753951 \; s[/tex]
The cat does not accelerate along the horizontal, so it has constant horizontal velocity. Since it strikes the floor 2.2 m from the table, then
[tex] v_x = \Delta x/t = \frac{2.2\; m}{0.451753951 s} = 4.869907597 \; m/s \Rightarrow 4.9 \; m/s [/tex]
The problem involves concepts of projectile motion and gravity. It first calculates the falling time under gravity and then uses this time to figure out the cat's horizontal speed when it slid off the table, which comes out to be 4.9 m/s.
Explanation:This problem involves multiple concepts from physics including projectile motion and gravity. The cat sliding off the table can be viewed as a projectile because it moves in two dimensions: horizontally (the cat sliding across the table and off the edge) and vertically (the cat falling down due to gravity). The key is to break down the problem into these two dimensions and solve them separately.
To calculate the horizontal speed, we first need to use the gravitational acceleration and the vertical distance to determine the time it takes for the cat to hit the ground. Assume the gravitational acceleration is approximately 9.8 m/s^2. When an object is falling freely under influence of gravity (from a certain height), the distance is equal to 0.5*g*t^2, where g is the gravitational acceleration and t is time. So, from the equation 1.0m = 0.5*9.8m/s^2*t^2, we solve for t and get t = sqrt(2h/g) = sqrt(2*1/9.8) ≈ 0.45 seconds.
Now, we know the cat hit the floor 2.2 meters away from the edge of the table. Given it did this in approximately 0.45 seconds, we can use the basic speed equation, distance/time, to find out the speed. Therefore, speed = 2.2 m / 0.45 s ≈ 4.9 m/s. This is the speed at which the cat was sliding off the table.
Learn more about Projectile Motion here:https://brainly.com/question/29545516
#SPJ3
A player hits a tennis ball in the air with an initial velocity of 32 meters per second at 35 degrees from the vertical how fast is the ball moving at the highest point
Answer: 18.35 m/s
Explanation:
At the highest point of trajectory, the vertical component of the velocity would be zero and the tennis ball would have horizontal component of velocity.
It is given that the initial velocity of the ball is 32 m/s and it makes 35° with the vertical. Hence the horizontal component of the velocity,
v sin θ = 32 m/s × sin 35° = 18.35 m/s
Hence, at the highest point in its trajectory, the tennis ball would be moving with the speed 18.35 m/s.
Cell division results in two new cells. Which of these statements correctly describes the relationship of these two new cells and the parent cell?
The statement that correctly describes the relationship between these two new cells and the parent cell is, mitosis results in two exact copies of the parent cell's genetic information. The correct option is A.
What is mitosis?In the cell division process known as mitosis, the parent cell divides to produce two genetically identical daughter cells. Cells from the same father and daughter share genetic information.
Prophase, Metaphase, Anaphase, and Telophase make up Mitosis. Human somatic cells go through a process called mitosis. A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes, during mitosis.
Therefore, the correct option is A. Mitosis results in two exact copies of the parent cell's genetic information.
To learn more about mitosis, refer to the link:
https://brainly.com/question/29776367
#SPJ5
The question is incomplete. Your most probably complete question is given below:
A.Mitosis results in two exact copies of the parent cell's genetic information
B.Mitosis results in four exact copies of the parent cell's genetic information.
C.Mitosis results in two new cells that are genetically different from the parent cell.
D.Mitosis results in four new cells that are genetically different from the parent cell
You are 15.0m from the source of a sound. At that distance, you hear it at a sound level of 20.0dB. How close must you move to the sound to increase the sound level to 60dB?
I think its 45.0cm?
15.0cm
45.0cm
55.0cm
60.0cm
85.0cm
Answer:
Explanation:
its 85 cm because it just is in meters it would be .8m which would be decent distance to hear it
The students in a class had the following scores on a test:
76, 79, 81, 83, 85, 86, 89, 91, 93
The teacher wants to make a box-and-whisker plot of these data. Which value should he use for Q3?
A. 90
B. 93
C. 91
D. 85
Answer:
He should use 90 for Q3 ⇒ answer A
Explanation:
Lets explain the meaning of Q3
Q1 is the "middle" value in the first half of the data set
Q2 is the median value in the set
Q3 is the "middle" value in the second half of the data set
The data are
76 , 79 , 81 , 83 , 85 , 86 , 89 , 91 , 93
The set has nine numbers, then Q2 is the fifth one
Q2 = 85
The first half of the data are:
76 , 79 , 81 , 83
The second half of the data are:
86 , 89 , 91 , 93
They are four numbers, then the middle one is the average of the
second and the third numbers
Q3 = [tex]\frac{89+91}{2}=90[/tex]
He should use 90 for Q3
Answer: The answer to this question is A
Explanation:
A plane has a cruising speed of 250 miles per hour when there is no wind. at this speed, the plane flew 300 miles with the wind in the same amount of time it flew 200 miles against the wind. find the speed of the wind.
V = speed of the plane with no wind = 250 mph
v = speed of wind
consider the motion of the plane while traveling with the wind :
V' = speed of plane travelling in the direction of wind = V + v = 250 + v
d' = distance traveled = 300 miles
t' = time taken to travel the distance
time taken to travel the distance is given as
t' = d'/V'
t' = 300/(250 + v) eq-1
consider the motion of the plane while traveling against the wind :
V'' = speed of plane travelling against the direction of wind = V - v = 250 - v
d'' = distance traveled = 200 miles
t'' = time taken to travel the distance
time taken to travel the distance is given as
t'' = d''/V''
t'' = 200/(250 - v) eq-2
Given that :
time taken to travel 300 miles = time taken to travel 200 miles
t' = t''
using eq-1 and eq-2
300/(250 + v) = 200/(250 - v)
3/(250 + v) = 2/(250 - v)
750 - 3 v = 500 + 2 v
5 v = 250
v = 50 mph
By setting up an equation based on the given information and the concept of relative velocity, the speed of the wind can be found to be 50 mph.
Explanation:You're looking for the speed of the wind, a classic problem that involves the concept of relative velocity. Here, the airplane's speed is impacted by the wind, either aiding its motion when it's flying with the wind, or hindering its motion when it's flying against the wind.
To calculate this, let's denote the speed of the wind as 'w'. When the plane is flying with the wind, its effective speed is (250 + w) mph, and when it's flying against the wind, its effective speed is (250 - w) mph.
Given the equation of speed which is the distance divided by time, we know that the time it takes to travel with the wind and the time it takes against the wind are the same from the question. Thus, distance over speed for both situations can be equated, i.e.:
300 / (250 + w) = 200 / (250 - w)
Solving that equation gives w = 50 mph.
Learn more about Relative velocity here:https://brainly.com/question/34025828
#SPJ3
It is not just lab chemicals but also common household substances that can be classified as acidic, basic, and neutral materials. This categorization is based on the concentration of hydrogen ion (H+), or hydronium ion (H3O+), and hydroxide ion (OH-) present in the solutions. Based on these ion concentrations, the pH or pOH can be calculated giving a quantitative assessment. Additionally, litmus paper or pH paper can be used to qualitatively determine if the solution is acidic, basic, or neutral. Red litmus paper turns blue in acid. Blue litmus paper turns red in base. pH paper gives a more precise pH number based on the color the pH paper turns when a small amount of solution is placed on the paper.
Most materials are either acidic or basic. Baking soda, bleach, codeine, detergent, egg whites, household cleaners, and seawater are basic because they have a high concentration of hydroxide ions in solution and pH above 7. Acid rain, beer, coffee, lemon juice, maple syrup, mouth wash, pickles, rain, soda, tea, tomatoes, and vinegar are acidic because they have a high concentration of hydrogen ions in solution and pH below 7. A few solutions have neutral pH due an equal concentration of hydrogen ions and hydroxide ions. Water is the only truly neutral substance but human blood, milk, plant food, saliva, and tofu are very close to neutral pH with nearly equal hydrogen ion and hydroxide ion concentration and pH near 7.
Listed in the Item Bank are key terms and expressions, each of which is associated with one of the columns. Some terms may display additional information when you click on them. Drag and drop each item into the correct column. Order does not matter.
In the acidic column: Coffee, Lemon juice, Orange juice, Soft drink, Vinegar, and Tomato are included. In the basic column: Baking soda and Milk of magnesia are included. In Neutral column: Antacid, Detergent, Salt, Sugar and Water are included.
Here are the classifications of the items in the image:
Acidic:
Coffee - Coffee has a pH of around 5, which is slightly acidic. This is due to the presence of organic acids such as chlorogenic acid and quinic acid.
Lemon juice - Lemon juice has a pH of around 2, which is very acidic. This is due to the presence of citric acid.
Orange juice - Orange juice has a pH of around 3-4, which is acidic. This is due to the presence of citric acid and ascorbic acid.
Soft drink - Soft drinks typically have a pH of around 2.5-3.5, which is acidic. This is due to the presence of phosphoric acid, carbonic acid, and citric acid.
Tomato - Tomatoes are slightly acidic, with a pH of around 4. This is due to the presence of citric acid and malic acid.
Vinegar - Vinegar has a pH of around 2-3, which is very acidic. This is due to the presence of acetic acid.
Basic:
Baking soda - Baking soda has a pH of around 9, which is slightly basic. This is due to the presence of sodium bicarbonate.
Milk of magnesia - Milk of magnesia has a pH of around 10, which is basic. This is due to the presence of magnesium hydroxide.
Neutral:
Antacid - Antacids are typically designed to have a pH of around 7, which is neutral. This is because they are used to neutralize stomach acid.
Detergent - Detergents can have a pH range of 6-12, depending on the type of detergent. However, most detergents are formulated to be neutral or slightly alkaline.
Salt - Salt (sodium chloride) has a pH of around 7, which is neutral.
Sugar- Sugar (sucrose) has a pH of around 7, which is neutral.
Water - Pure water has a pH of 7, which is neutral.
Describe the relationship between a compass and a magnet. Explain a demonstration you could do to show this relationship.
Magnet
In general the magnet is a special kind of metal (alloy), it attracts other metals or or magnet closer to it.
The earth is a magnet, because it attracts everything towards it.
compass:
A compass is needle, which is magnetized and mounted in measuring devices (like, pressure gauge, voltmeter, watt meter, etc.) such that it rotates freely. In the measuring devices the needle turns until one end points north and other south.
Demonstration:
Let us consider an ordinary bar magnet and a regular compass, Now move the regular compass around the bar magnet (circling) , and observe it, what happen?
Yes, you will notice the needle rotates in the regular compass. When you bring the compass near the bar magnet, the needle of the compass points to the south and when the compass away from a bar magnet, the needle moves to the north pole. So we conclude that the north end of the compass attracted to the south end of the magnet.
5. A truck left a diner at 1:00 p.M. And drove 360 km to Jersey City. The truck arrived at 2:00 p.M. And drove to Jersey City at an average 7:00 p.M. A car left the same dinner speed of 80 km/h. A. How fast did the truck travel?
Answer:
360 km/h
Explanation:
The truck left the diner at 1.00 pm and arrived at Jersey City at 2.00 pm - This means that the total time of the trip was 1 hour:
[tex]t = 1 h[/tex]
The distance covered between the diner and Jersey City was 360 km:
[tex]S=360 km[/tex]
So, the average speed of the truck is given by the distance covered divided by the time taken:
[tex]v=\frac{S}{t}=\frac{360 km}{1 h}=360 km/h[/tex]
Answer:
average speed of the truck will be 60 km/h
Explanation:
Truck started his Journey from diner at 1:00 PM
It reached to the Jersey City at 7:00 PM
so here we have total time interval of journey for the truck motion is given as
[tex]t = 7 - 1 = 6 hour[/tex]
total distance = 360 km
so here we know that average speed is defined as
[tex]v_{avg} = \frac{distance}{time}[/tex]
[tex]v_{avg} = \frac{360 km}{6 h}[/tex]
[tex]v_{avg} = 60 km/h[/tex]
so average speed of the truck will be 60 km/h
Which scenario best illustrates the principle of popular sovereignty?
A. The president is impeached and removed from office after he breaks the law.
B. Congress overrides a presidential veto of a law passing a new tax.
C. A senator holds town hall meetings to find out how citizens think she should vote on gun control legislation.
D. A Supreme Court justice is appointed by the president but is not approved by Congress.
The principle of popular sovereignty, which states that all political power comes from the people, is best represented by the scenario where a senator holds town hall meetings to decide on their vote for gun control legislation. This shows direct influence of people's will on government decisions.
Explanation:The principle of popular sovereignty, which holds that all powers of
government are directly or indirectly derived from the people, is best illustrated by the scenario where 'A senator holds town hall meetings to find out how citizens think she should vote on gun control legislation' (Option C). This scenario illustrates popular sovereignty as it exemplifies how the people's will is directly influencing governmental decisions. The senator is seeking the opinion of the citizens she represents before making a decision, thereby extending the power to the people. In the other options, the actions are either reactions to misconduct or a decision made by office holders rather than a direct involvement or representation of the citizens who form the true sovereign base of the government.
Learn more about Popular Sovereignty here:https://brainly.com/question/29974056
#SPJ2
Extra credit calculate the total mechanical energy of a pendulum as it swings from its highest point to its lowest point
The potential difference across a resistor is 4.4 × 10 V. If the resistance of the resistor is 1.8 k?, how much current flows through the resistor?
The current flowing through the resistor is 2.44 x 10^-3 A.
Explanation:To find the current flowing through the resistor, you can use Ohm's Law which states that the current (I) is equal to the potential difference (V) across the resistor divided by the resistance (R). In this case, the potential difference across the resistor is 4.4 × 10 V and the resistance is 1.8 kΩ (which can be converted to 1.8 x 10^3 Ω). Using Ohm's Law:
I = V / R = (4.4 x 10) / (1.8 x 10^3) = 2.44 x 10^-3 A
Therefore, the current flowing through the resistor is 2.44 x 10^-3 A.
A skydiver has reached the point where the force of air resistance equals the force of gravity. Until she opens her parachute, her acceleration will
A) remain at 0 m/s2.
B) continue increasing.
C) continue decreasing.
D) remain at 9.8 m/s2.
Answer:
A) remain at 0 m/s2.
Explanation:
A skydiver has reached the point where the force of air resistance equals the force of gravity. Until she opens her parachute, her acceleration will
A) remain at 0 m/s2.
B) continue increasing.
C) continue decreasing.
D) remain at 9.8 m/s2.
resistive force is the force exerted by air on an object passing through it.
at the point point where the force of air resistance equals the force of gravity.we say the sky driver has reached the terminal speed
Terminal speed is the speed at which the force from the weight of the skydriver equals the force of air resistance, so the acceleration is zero. when the change in velocity is zero, then the acceleration becomes zero.
The motion of an orbiting satellite can be described by the same motion characteristic of any object in uniform circular motion. The centripetal force acting toward the center of the circle, in this case, is supplied by
The force exerted by Earth plays the role of centripetal force.
Answer:
A- GRAVITY
Explanation:
IF IS ON USATestprep
Which experimental result led to the inference that atoms contained electrons?
A. Most alpha particles passed straight through a thing sheet of gold foil.
B. Th beam is a cathode ray tube was moved by an electric force.
C. Electrons were found to have higher energy the farther they are from the nucleus.
D. A few alpha particles bounced off a thin sheet of gold foil.
B. The beam in a cathode ray tube was moved by an electric force.
AtomsAn atom is the smallest unit of ordinary matter that forms a chemical element.The electron is a subatomic particle whose electric charge is negative one elementary charge. B. The beam in a cathode ray tube was moved by an electric force. This experimental result led to the inference that atoms contained electronsFor more information:
https://brainly.com/question/657632?referrer=searchResults
Which sound characteristic is not affected by the relative motion of an object
Answer: Quality is one of the characteristic of the sound which is not affected by the relative motion of an object.
Explanation: There are three characteristics of the sound which are pitch, loudness and quality.
Pitch depends on the frequency of the sound. The frequency varies in the case of the relative motion of the object.
Loudness depends on the amplitudes of the vibration. The amplitude also varies in the case of the relative motion of the object.
Quality is described by the word timber. The different sounds are produced by different sources. Therefore, It is not affected by the relative motion of the object.
Answer:
the answer is intensity on gradpoint
Explanation:
A 24-V battery is powering a light bulb with a resistance of 3.0 ohms. What is the current flowing through the bulb? A) 7.20 A B) 8.0 A C) 12.0 A D) 72.0 A
According to Ohm's law for a portion of the circuit we have:
U=RI=>I=U/R=24/3=8 A
The correct answer is B
The current flowing through the bulb having a resistance of 3 ohms is 8 A.
The correct answer to the question is Option B. 8 A
From the question given above, the following data were obtained:
Voltage (V) = 24 V
Resistance (R) = 3.0 ohms.
Current (I) =?The current flowing through the bulb can be obtained by using the ohm's law equation as illustrated below:
V = IR24 = I × 3
Divide both side by 3
I = 24 / 3
I = 8 ATherefore, the current flowing through the bulb is 8 A.
The correct answer to the question is Option B. 8 A
Learn more: https://brainly.com/question/16203435