Answer: 5km by straight line, 7km by route.
Explanation:
The distance by route is 3km south and then 4km east, notice that the distances are perpendicular to each other, so the total distance traveled (by a straight line) is:
D = √((3km)^2 + (4km)^2) = √(9km^2 + 16km^2) = (√25)km = 5km
So the distance by a straight line that he needs to go back to where he started is 5km, and if he wants to get back by route, he must do 4km to the west and then 3km to the north, so a total of 7km
an airplane travels at a speed of 90 m/s for 30 minutes. how far does it travel?
If an object weighs 300 N on earth, what is it’s mass on the moon?
Answer:
The mass of the object on the Moon (and anywhere else) is about 30.61kg. Please see more detail below.
Explanation:
Weight is the gravitational force exerted on the object and is a function of mass and gravitational acceleration:
(weight) = (mass) x (gravitational acceleration)
We are to find the mass, knowing the weight on Earth to be 300N:
(mass) = (weight on Earth) / (gravitational acceleration on Earth) = 300N / 9.8 m/s^2 = 30.61 kg
The mass of the object is 30.61kg.
The mass of the object is independent of gravity. Therefore the answer to the question "What is its mass on the Moon" is 30.61kg.
If the question were what is its weight on the Moon, the answer would be
(weight on Moon) = (mass) x (grav.accel. on Moon) = 30.61kg x 1.62 m/s^2 = 49.59N
which is about 1/6 of the object's weight on the Earth.
a geostationary satellite has a orbital radius of 4.23*10.7m.
a).calculate it’s speed in orbit
Answer ;
Note : Satellite completes one orbit in the same time the earth rotates one about its axis
circumference of the orbit = 2 ×π × 4.23×10⁷ (similar to the earth orbital speed
The time of earth/orbit traveled = 23.93 hrs ,
Speed of the orbit = (distance) ÷ (time)
= circumference ÷ time
= (2 ×π × 4.23×10⁷) ÷ 23.93 (1 hr = 3600 sec.)
= 3085.14 m/s
The orbital velocity is 3085.14 m/s
if an object is moving at a constant speed, the forces acting on it must be ___. Another way to say this is that the net force = __.
Answer : Equal, Zero
If the object is moving at constant speed, it is under "equilibrium". So, forces acting on object are equal and the net force is zero.
a car travels at a speed of 20 km/hr for 3 hours. how far does it travel in kilometers
Formula
d = r * t
Givens
r = 20 km/hourt = 3 hoursd = ??Solution
d = 20 km/hour * 3 hrd = 60 km the hours cancel outi did this in class a while ago so you multiply 20 * 3. And you answer is 60.
if you need any more help feel free to message me :)
Very light items remain on the surface of water because of surface currents.
True or false
False.
This is the principle of Archimedes: A body introduced into a liquid is pushed from the bottom up with a force equal to the weight of the liquid displaced by the body.
the correct answer is false
the force needed to lift a 3000 N truck using a jack with a MA of 15
As we know that mechanical advantage is defined as
[tex]MA = \frac{F_o}{F_{in}}[/tex]
now here we have
[tex]MA = 15[/tex]
also we have
[tex]F_O = 3000 N[/tex]
now we will have
[tex]15 = \frac{3000}{F_{in}}[/tex]
now we will have
[tex]F_{in} = \frac{3000}{15}[/tex]
[tex]F_{in} = 200 N[/tex]
so our applied force will be 200 N
What is noetic science?
Noetic science is an interdisciplinary field that aims to understand consciousness and the human mind. It stems from the Greek word 'noesis' which means inner wisdom, direct knowing, or subjective understanding. It shares some principles with physics, particularly quantum physics, but also extends beyond traditional physics to explore consciousness and subjective experiences.
Explanation:Noetic science, which also aligns with concepts in cognitive science, is an interdisciplinary field that seeks to understand the nature of consciousness and the human mind. It looks into the capabilities of the mind beyond the physical realm and tries to understand phenomena like cognition and intuition.
The terms noetic science comes from the Greek word "noesis" which means inner wisdom, direct knowing, or subjective understanding. In essence, it is about investigating the nature of consciousness, going a step beyond the traditional physical sciences.
It explores the idea that consciousness isn't solely a product of the brain and attempts to bridge the gap between the objective sciences and the inner subjective experience. This would indeed fall under the wider umbrella of physics as it deals with aspects of energy and matter.
It shares some principles with physics, specifically quantum physics, in the sense that it investigates the fundamental nature of the universe and the interactions of energy and matter. However, it extends these investigations to encompass consciousness and subjective experiences which are more difficult to quantify and measure.
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Landon's new toy arrived in the mail covered in foam packing peanuts. The foam packing peanuts have a mass of 30 g and a volume of 60 cm3. What is the density? 2 g/cm3
180 g/cm
3 0.5 g/cm
3 2
The formula for calculating density is P=M/V where P is the density, M is the mass, and V is the volume.
The problem gives you the mass, 30g, and the volume, 60cm^3;you can plug those into the equation, which should give you P=30/60.
Your answer should end up being P=0.5 g/cm^3.
WORK:
P=M/V
P=30g/60cm^3
P=0.5g/cm^3
Answer:
p=0.5 g/cm3 C is the answer
Based on the graph, how would you describe the motion of the object?
Answer: positive velocity, zero acceleration
Explanation: took that on the test
A frame hanging on a wall is held by two cables. The tension in each cable is 30 N, and the cables make an angle of 45° with the horizontal, as shown in the picture. What is the weight of the frame?
A) 10.2 N
B) 21.2 N
C) 32.4 N
D) 42.4 N
Answer: This is wrong The correct answer is 42.4 N
Explanation: I took the USA TESTPREP
OPTION D. The weight of the frame is determined by the upward force the two cables exert to keep it in equilibrium. Each cable exerts a vertical force of 21.2 N, totaling to 42.4 N. Thereby, the weight of the frame is 42.4 N.
Explanation:This problem can be solved using the principle of forces in equilibrium. If the frame is at rest and not falling, the resultant force is zero, meaning the upward forces equal the downward forces. The tension force in the cable has components parallel and perpendicular to the direction of gravity. We only need to consider the vertical component as that is the direction of the weight of the frame.
The vertical component of the tension in one cable is given by Tsinθ = 30N * sin(45°) = 21.2 N. Since there are two cables, the total upward force is 2 * 21.2 N = 42.4 N. This equals the downward force, i.e. the weight of the frame, which is therefore 42.4 N. So, the correct answer is D).
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Why is Pluto eliminated from the solar system?
Answer:
Pluto was not considered a planet because of how small it was, therefore Pluto was removed from the solar system.
Which of the following situations demonstrates balanced forces? A. a child on a moving seesaw B. a car driving on a straight freeway at 60 miles per hour C. a clock's pendulum in motion D. a rock thrown upward, being acted on by gravity
Answer: option B. a car driving on a straight freeway at 60 miles.
Explanation:
A balance forces are said to act on an object when net force on an object is zero and the object is either at rest or moves with constant speed without changing direction.
In option A, C, and D the objects are changing direction during their motion. In option B, a car moves on a straight freeway in a single direction at constant speed of 60 miles per hour. Hence, the correct demonstration of balanced forces is by option B.
the answer is the car on the highway of your doing study island
How do you know that potassium an alkali metal is highly reactive
Potassium is in the most reactive group of elements, the alkali metals, but it's not the most reactive metal within the group. The alkali metals, Group 1A, are the most reactive metals because they have one valence or outer electron. They lose this electron very easily, forming ions with a charge of +1.
Potassium is known as a highly reactive alkali metal due to its small ionization energy that facilitates the loss of its valence electron to form K+ ions. Its extreme reactivity is also demonstrated when it reacts with oxygen, water, and halogens, often requiring it to be stored under oil to prevent accidental reactions with air or moisture.
We know that potassium is a highly reactive alkali metal due to several characteristics. One of the key reasons for its reactivity is its small ionization energy, which makes it easier for potassium to lose its single outer-shell electron and form [tex]K^+[/tex] ions. This low ionization energy is common among alkali metals, and it allows them to form monocations easily.
Potassium's reactivity is also evident as it must be stored under oil to prevent it from reacting with air. When potassium does react with air, especially oxygen, it can cause a combination reaction that is highly exothermic. A balanced chemical equation representing this reaction with oxygen is [tex]4K + O_2 \rightarrow 2K_2O[/tex].
Furthermore, the reactivity of potassium can be seen when it is placed in water. The reaction is intense enough to produce hydrogen gas and heat, with heavier alkali metals reacting even more violently. The typical reaction with water is shown by the equation [tex]2K + 2H_2O \rightarrow 2KOH + H_2[/tex]. Finally, potassium's reactivity is demonstrated in its reactions with halogens, which are typically very exothermic and even violent.
2350m = is how many kilameters
Answer:
2.35 killometers
Explanation:
A truck travelled at a constant speed for 6 hours. Then , it decreased itd speed by 13 mph for the remaining 228 miles. If the total distance was 876 miles, how long did it take to travel the remaining 228 miles
Answer:
Time taken to travel remaining 228 miles = 2.4 hours.
Explanation:
Total distance = 876 miles.
Distance traveled after speed reduction = 228 miles
So, distance traveled before = 876 - 228 =648 miles.
Time taken for this = 6 hours.
Speed before speed reduction = 648/6 = 108 mph.
Speed after speed reduction = 108 - 13 = 95 mph
Time taken to travel remaining 228 miles = 228/95 = 2.4 hours.
Answer:
2.4
Explanation:
I just had this question
what the hell does "Give an example of a situation in your life in which you depend on testing and evaluation in a product design to keep you safe." even mean?
Suppose you are pushing a car with a certain net force. If you then push it twice the net force, the car's acceleration
A. becomes four times as much.
B. becomes two times as much.
C. stays the same.
D. becomes half as much.
From my calculations The answer is B
what are the units for the spring constant,k?
Answer:
[tex]\frac{kg}{s^2}[/tex] or [tex]\frac{N}{m}[/tex]
Explanation:
The force in a spring is described as (F) = (k) x (d) with (d) being the displacement, measured in meters. (F) is to come out in Newtons. So (k) is assigned the appropriate unit for that to happen. The two possibilities listed above achieve that.
Answer:
The units for the spring constant k is [tex]\frac{kg}{s^2}\ \text{or}\ \frac{N}{m}[/tex].
Explanation:
According to hooks law:
[tex]F=-kx[/tex]
Where F is a force, k is spring constant and x is distance.
Here, the negative sign of the force of the spring, which implies the force of the spring, is opposed to the displacement of the spring.
Now in order to find the units for spring constant k, ignore the negative sign as we are looking only at the magnitude.
[tex]F=kx[/tex]
[tex]\frac{F}{x}=k[/tex]
Therefore,
[tex]\frac{kg}{s^2}\ \text{or}\ \frac{N}{m}[/tex]
Hence, the units for the spring constant k is [tex]\frac{kg}{s^2}\ \text{or}\ \frac{N}{m}[/tex].
In a cricket match, the 0.16kg ball is bowled with a straight arm. During one particular delivery, the ball leaves the bowler's hand horizontally, with a speed relative to the ground of 80.8 mph. The bowler's arm is 0.64 m long and the bowler is running at 10.0 mph when the ball is released.
Calculate the centripetal force exerted on the ball in the bowler's hand, in N.
Note: 1 mph = 0.447 ms^-1.
Answer:
412.1 N
Explanation:
First of all let's calculate the total speed of the ball as it is released, which is equal to the speed of the ball + the speed of the bowler:
[tex]v=80.8 mph +10.0 mph=90.8 mph[/tex]
Now let's convert it into m/s. We know that
[tex]1 mph = 0.447 m/s[/tex]
So
[tex]1 mph:0.447 m/s = 90.8 mph:v\\v=\frac{(0.447 m/s)(90.8 mph)}{1 mph}=40.6 m/s[/tex]
And now we can calculate the centripetal force, which is given by:
[tex]F=m\frac{v^2}{r}[/tex]
where
m = 0.16 kg is the mass of the ball
v = 40.6 m/s is the speed of the ball
r = 0.64 m is the radius of the circular path (equal to the length of the bowler's arm)
Substituting:
[tex]F=(0.16 kg)\frac{(40.6 m/s)^2}{0.64 m}=412.1 N[/tex]
A 50 Kg box sits at rest on a 30 degree ramp where the coef of static friction is 0.5773. How hard would you have to push horizontally to get the box to start to move up the ramp?
Given data
m = 50 Kg
Weight(W) = 50×9.81 = 490.5 N
Coefficient of friction (μs) = 0.5773
Angle of ramp = 30 degrees
Determine the horizontal push (P) = ?
P cos Θ = W sin Θ + μs P sin Θ + μs W cos Θ
P (cos Θ -μs sin Θ ) = W ( sin Θ + μs cos Θ)
P = W ( sin Θ + μs cos Θ)/ (cos Θ -μs sin Θ )
P= 841.58 N
Harizontal push is required = 841.58
A bullet is fired at 660m/s and strikes a target 200.0 meters away. What is the time of the bullet’s flight?
Given data
Velocity of bullet (v) = 660 m/s,
target distance (d) = 200 m ,
time of bullet's flight (t) = (distance traveled) ÷ (velocity of bullet)
= 200 ÷ 660
= 0.30 sec.
Time of bullet's flight is 0.30 seconds.
CAN SOMEONE PLEASE HELP ME WITH MY PHYSICS QUESTIONS? I NEED CORRECT ANSWERS ONLY
Consider a situation where you are playing air hockey with a friend. The table shoots small streams of air upward to keep the puck afloat and to minimize friction. When you barely tap the puck forward, it
A. slows and stops.
B. moves with a constant speed until hitting the other end.
C. moves backward with an equal and opposite velocity.
D. continues to accelerate.
how much work is done if an object moves 4.5 m in has 12 Newtons of force acting on it
Given Data:
Displacement of objects (s) = 4.5m,
Force applied (F) = 12 N,
Work done (W)=?
Work is defined as an effort done in order to achieve the result. In this case an effort done to move the object to certain distance.
Mathematically, From Joules law, W = Force × displacement
W = 12×4.5
= 54 J
A 0.14-kg pinecone is 16m above the ground. What is it’s gravitational potential energy
Given that:
mas (m) = 0.14 Kg ,
height (h) = 16 m,
Determine gravitational potential energy ?
Gravitational potential energy = m × g × h
= 0.14 × 9.81 × 16
= 21.97 Joules
A force of 8480 is applied to a car to decelerate it at a rate of 32.0 m s squared. What is the mass of the car?
Given data
Force (F) = 8480 N,
acceleration (a) = -32 m/s² ,
mass of the car (m) = ?
We know that, from Newtons II law,
F = m.a
=> m = F ÷ a ,
= 8480 ÷ (-32)
= 265 Kg (Neglect negetive sign)
Mass of the car is 265 Kg
Complete the steps for converting 3.6 gallons per minute to milliliters per second. (1 gallon = 3.79 liters and 1 liter = 1,000 milliliters)
Given that,
Capacity = 3.6 gallons per minutes
Convert it into milliliters per seconds
Since, 1 gallon = 3.79 liters
1 liters = 1000 milliliters
Capacity= (3.6*3.79*1000)/(60)
Capacity = 227.4 milliliters per second.
3.6 gallons per minute is equivalent to a flow rate of 227.4 milliliters per second.
Here are the steps to convert 3.6 gallons per minute to milliliters per second:
Convert gallons to liters: 3.6 gallons * 3.79 liters/gallon = 13.644 liters per minute.
Convert minutes to seconds: Since there are 60 seconds in a minute, divide 13.644 liters by 60 to get the flow rate in liters per second: 13.644 liters / 60 seconds = 0.2274 liters per second.
Convert liters to milliliters: Since there are 1,000 milliliters in a liter, multiply 0.2274 liters by 1,000 to get the flow rate in milliliters per second: 0.2274 liters * 1,000 milliliters/liter = 227.4 milliliters per second.
Therefore, 3.6 gallons per minute is equivalent to 227.4 milliliters per second.
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A 70 kg man is walking at a speed of 2 m/s. What is his Kinetic Energy?
Kinetic energy = 1/2 (mass) (speed squared)
KE = 1/2 (70kg) (2m/s)^2
KE = (35 kg) (4 m^2/s^2)
KE = (140) kg-m^2/s^2
That's 140 Newton-meter
or
140 Joules
The kinetic energy is 140 joules
The parameters given in the question are
mass= 70 kg
velocity= 2m/s
Kinetic energy= 1/2mv²
= 1/2 × 70 × 2²
= 0.5 × 70 × 4
= 140 joules
Hence the kinetic energy is 140 joules
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a box with a mass of 12.5kg sits on the floor how high would you need to lift it has a GPE of 568j
Object A has of mass 7.20 kilograms, and object B has a mass of 5.75 kilograms. The two objects move along a straight line toward each other with velocities +2.00 meters/second and -1.30 meters/second respectively. What is the total kinetic energy of the objects after the collision, if the collision is perfectly elastic?
A.
19.3 joules
B.
21.9 joules
C.
38.5 joules
D.
43.0 joules
E.
50.8 joules
Answer:
A. 19.3 joules
Explanation:
The collisions is perfectly elastic: this means that both total momentum and total kinetic energy are conserved after the collision.
Therefore, we can just calculate the total initial kinetic energy before the collision, and then say that it is equal to the total kinetic energy after the collision.
The kinetic energy of object A is:
[tex]K_A = \frac{1}{2}m_A v_A^2=\frac{1}{2}(7.2 kg)(+2.0 m/s)^2=14.4 J[/tex]
The kinetic energy of object B is:
[tex]K_B = \frac{1}{2}m_B v_B^2=\frac{1}{2}(5.75 kg)(-1.3 m/s)^2=4.9 J[/tex]
So, the total kinetic energy before (and after) the collision is
[tex]K=K_A + K_B=14.4 J+4.9 J=19.3 J[/tex]