The gravitational force between two planets would increase by a factor of nine if the masses of both planets are tripled, while the distance between them stays the same.
The student is asking about the effect on gravitational force when the masses of two planets are tripled but the distance between them remains constant. According to Newton's law of gravity, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
If both masses are tripled, the gravitational force becomes 3 imes 3 times larger because the force depends on the product of the two masses. Since the distance does not change, the ratio of the gravitational force after tripling the masses would be 9:1 when compared to the initial force (3 imes 3 = 9). Therefore, the gravitational force increases by a factor of nine
The ratio of red to blue marbles in a bag 3:2. If there are 18 red marbles. How many blue marbles are in the bag
If the ratio of red to blue marbles in a bag is 3 : 2 . If there are 18 red marbles, then there are 12 marbles in the bag.
What is the percentage of a number?It is the relative value that represents the hundredth part of any number for example 2% of any number represents, 2 multiplied by the 1/100th of that number.
As given in the problem, the ratio of red to blue marbles in a bag is 3:2. If there are 18 red marbles, then we have to find the number of blue marbles,
The number of the blue marbles = 18 × 2 / 3
= 12
Thus, If the ratio of red to blue marbles in a bag is 3 : 2 . If there are 18 red marbles, then there are 12 marbles in the bag.
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You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.5 m. (a) what fraction of its initial energy is lost during the bounce? (b) what is the ball's speed just as it leaves the ground after the bounce? (c) where did the energy go?
a) At a position of 2.0m, the Initial energy is
all made up of the potential energy=m*g*hi
and meanwhile at 1.5 all its energy is also potential energy=m*g*hf
The percentage of energy remaining is E=m*g*hi/m*g*hf x 100
and since mass and gravity are constant so it leaves us with
just E=hi/hf
which 1.5/2.0 x100= 75% so we see that we lost 25% of the
energy or 0.25 in fraction
b) Here use the equation vf^2=vi^2+2gd
where g is gravity, vf is the final velocity and vi is the
initial velocity while d is the distance travelled
so in here we are looking for the vi so let us isolate that
variable
we know that at maximum height or peak, the velocity is 0 so
vf is 0
therefore,
vi =sqrt(-2gd)
vi =sqrt(-2x-9.81x1.5)
vi =5.4 m/s
c) The energy was converted to heat due to friction with the
air and the ground.
The force that pulls objects toward each other
Final answer:
Gravity is the force that pulls objects toward each other, always acting to bring masses together. It is determined by the mass of the objects, with larger objects exerting stronger gravitational pulls. This force is vital in everyday phenomena and in the broader understanding of the universe.
Explanation:
The force that pulls objects toward each other is known as gravity. This fundamental force is omnipresent in nature, always acting in an attractive manner between two objects. The strength of gravitational pull is directly related to an object's mass; therefore, the larger an object, the stronger its gravitational pull. Unlike other forces that can push objects apart, gravity uniquely pulls them together. It's important to note that every object with mass in the universe exerts a gravitational pull on every other mass, a principle crucial in understanding the cosmic ballet of celestial bodies, as well as the everyday phenomenon of objects falling towards the Earth.
Gravity's effect is evident in daily experiences, such as why we stay grounded on Earth and not drift off into space. The understanding of gravity also plays a crucial role in designing structures and in aerospace engineering, where gravitational forces must be accounted for. The gravitational force is consistent with Newton's third law, indicating that the force experienced between two objects due to gravity is equal in magnitude and opposite in direction, aligning along a line joining the centers of mass of the two bodies involved.
You answer your phone at home several times a day, but it is always a telemarketer. Finally you stop answering it. This is an example of
A. Passive avoidance
B. Extinction
C. Negative reinforcement
D. A variable ratio schedule
How much bigger is the sun than the earth?
The sun is 900,000 miles (1,448,410 km) wide. It is the brightest object in the sky. To put into perspective how big the sun is, about 1.4 million Earths could fit inside the sun!
The basic unit of pressure mapped on weather maps is
The basic unit of pressure mapped on weather maps is Millibar (mb). The correct option is A.
The standard unit for displaying atmospheric pressure on weather maps is the millibar, which is a frequently used unit of pressure in meteorology. It is equal to 100 pascals, or one thousandth of a bar.
Isobars, or lines bridging regions of equal atmospheric pressure, are shown on weather maps, and they are commonly labelled in millibars.
With the aid of this device, meteorologists can quickly analyse and evaluate pressure variations and patterns across various geographic locations, which aids in comprehending weather systems and the circumstances that go along with them.
Thus, the correct option is A.
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Your question seems incomplete, the probable complete question is:
The basic unit of pressure mapped on weather maps is
A) Millibar (mb)
B) Pascal (Pa)
C) Atmosphere (atm)
D) Pound per square inch (psi)
Calculate the kinetic energy of an 84-kg scooter moving at 18 m/s .
Answer:
13608 joules
Explanation:
We are given that mass of scooter=84 kg
Speed of scooter=18 m/s
We have to calculate the kinetic energy
We know that formula of kinetic energy
[tex]K.E=\frac{1}{2}mv^2[/tex]
Substitute the values then we get
K.E=[tex]\frac{1}{2}\times 84\times (18)^2=13608 joules[/tex]
Hence, the kinetic energy of an scooter=13608 joules
Which describes the motion in a convection current?
a) horizontal motion only
b) vertical motion only
c) linear motion
d) circular motion
Circular motion is the type of motion which is responsible for the motion in a convection current. Thus, the correct option is D.
What is Convection current?The heat energy can be transferred through the process of convection by the difference which is occurring in the temperature between two parts of the fluid. Due to this difference in temperature, the hot fluids tend to rise, whereas the cold fluids tend to sink deeper. This creates a current within the fluid which is called as the convection current.
Convection currents are the heat-driven cycles which occur in the air, ocean, and mantle due to the circular motion. They are caused by a difference in temperature, often due to a differing proximity to a heat or energy source. The difference in the temperature relates directly to the density of the material, which is causing this effect.
Therefore, the correct option is D.
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Dry air will break down if the electric field exceeds about 3.0 Ã 106 v/m. what amount of charge can be placed on a capacitor if the area of each plate is 7.9 cm2?\
The air inside a balloon exerts a force of 1.5 n on an area of 0.5 m^2. what is the pressure inside the balloon?
Lesson 9: Fluid Pressure (connexus students!)
1.D) 3 n/m^2
2.C) 2 meters below the surface of a swimming pool
3.B) cork
4.A) depends only on the type of fluid
5.A) the air pressure decreases
One molecule of glucose makes 30 molecules of atp. how many molecules of glucose are needed to make 300 molecules of atp in aerobic respiration?
Answer:
10
Explanation:
The glucose molecules produce the energy currency ATP by the process of glycolysis. If one molecules of glucose makes 30 molecules of ATP, then 10 glucose molecules are needed to make 300 molecules of ATP in aerobic respiration.
What is glycolysis?Glycolysis is the process of breakdown of glucose to produce the chemical energy in the form of ATP i.e. Adenosine triphosphate. Glycolysis is called the cellular respiration where the oxygen and glucose is consumed to produce ATP and carbon dioxide.
Body stores the chemical energy in the form of glucose, when body needs energy, these glucose molecules are broken down to produce ATP.
If one molecule of ATP produces 30 ATP molecules, then, the number of glucose molecules needed to produce 300 ATP molecules is:
= (300 /30) = 10
Therefore 10 glucose molecules are needed to produce 300 ATP molecules.
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A car initially traveling at 60 km/h accelerates at a constant rate of 2.0 m/s2. how much time is required for the car to reach a speed of 90 km/h?4
Final answer:
To calculate the time for a car to accelerate from 60 km/h to 90 km/h with a constant acceleration of 2.0 m/s², velocities are converted to m/s and the formula v = u + at is used. The result is a time of 4.17 seconds.
Explanation:
The question pertains to a car initially traveling at 60 km/h that accelerates at a constant rate of 2.0 m/s² until it reaches a speed of 90 km/h. To calculate the time required for the car to reach this speed, we must first convert the initial and final velocities from km/h to m/s. Doing so, 60 km/h equals 16.67 m/s and 90 km/h equals 25.00 m/s. The formula that relates initial velocity (u), final velocity (v), acceleration (a), and time (t) is:
v = u + at
Substituting the known values results in:
25.00 m/s = 16.67 m/s + (2.0 m/s²)t
By rearranging the equation, we can solve for t:
t = (25.00 m/s - 16.67 m/s) / 2.0 m/s²
t = 4.17 s
Therefore, the car requires 4.17 seconds to accelerate from 60 km/h to 90 km/h given a constant acceleration of 2.0 m/s².
Nearly all physics problems will use the unit m/s squared. Why are the seconds squared?
A plane flies 600 kilometers away from its bad at 400 meters per second then flies back to its base at 600 meters per second. What is it’s average velocity?????
Calculate the acceleration of a 25 kg object that has move the force of 300 n
The force on the body of mass 25 kg is 300 N then the acceleration of the body will be equal to 12 m/s².
What is acceleration?The rate of change in an object's velocity with respect to time is known as acceleration in mechanics. The vector quantity of accelerations. The direction of the net force that is acting on an object determines its acceleration.
Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well. The definition of acceleration is the change in velocity vector over a time interval divided by the time interval.
As per the information given in the question,
Force, F = 300 N
Mass, m = 25 kg
Use the formula of force,
F = ma
300 N = 25 × a
a = 300/25
a = 12 m/s²
Therefore, the acceleration is 12 m/s².
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Which of the following is most likely to be attracted to a magnet? A. A piece of glass B .A piece of plastic C .A stainless-steel paper clip D .A wet newspaper
The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components negative?
A)less than 30 degrees
B)between 30 and 60 degrees
C)between 61 and 90 degrees
D)greater than 90 degrees
Which telecommunications device is ideal for communication during natural disasters when regular telecommunication modes might not be functional?
Answer:
satphone
Explanation:
plato users
Answer:
Explanation:
sat phone
common knowledge mate
What will be the acceleration of a skydiver when air resistance builds up to 86% of her weight? assume the acceleration due to gravity is 10 m/s 2 . answer in units of m/s 2 ?
The acceleration of a skydiver when air resistance is 86% of her weight is calculated by finding the net force on her (weight minus air resistance), then dividing this by her mass. The result is 1.4 m/s^2, reflecting the balance of forces and the concept of terminal velocity.
Explanation:To calculate the acceleration of a skydiver when the air resistance is 86% of her weight, we must first understand that the net force on the skydiver is her weight minus the force of air resistance. If the air resistance is 86% of the skydiver's weight, then only 14% of her weight is acting downwards. Considering the weight (force) is the mass (m) times the acceleration due to gravity (g), or F=mg. We then have, a = Fnet / m = 0.14 * weight / m = 0.14 * g (as weight = mg).
Given g (acceleration due to gravity) is 10 m/s2, substituting this into our equation gives an acceleration of a = 0.14 * 10 m/s2, which is 1.4 m/s2. Therefore, the acceleration of the skydiver when air resistance builds up to 86% of her weight is 1.4 m/s2.
It's important not only to understand formulae in physics but also the concepts they express. In this situation, that concept is the balance of forces and how they affect an object's movement. In the case of a skydiver, as they fall, air resistance builds up until it equals their weight, causing their acceleration to decrease until they reach a constant velocity, known as 'terminal velocity'.
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Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?
Answer:B
Explanation: Because the weight will be greater with one leg lifted up in the air, it will make the weight more.
If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?
Answer:
[tex]\Huge \boxed{\mathrm{200 \ N}}[/tex]
Explanation:
[tex]\sf Weight \ (N)= mass \ (kg) \times acceleration \ of \ gravity \ (m/s^2)[/tex]
[tex]W=mg[/tex]
Your mass is 20 kg.
The acceleration of gravity is approximately 10 m/s².
[tex]W=20 \times 10[/tex]
[tex]W=200[/tex]
Your weight is 200 N.
A rock is dropped from the top of a building. after 4 seconds it is moving at 40 m/s. what was the acceleration of the rock
Which expression is a measurement of density? 5.2 cm 3 0.71 mg 20 g/cm 2 5.13 kg/l?
We know that the density is defined as the ratio of mass to the volume.
Density = Mass/volume
We know that the unit of the mass is kg
Unit of the volume is liter (l)
Therefore the unit of the density will be kg/l .
Now the first expression is 5.2 Cm^3 which is a unit of volume. Therefore it will not be the expression for density.
Second expression is 0.71 mg which has unit of mass. Therefore it will also not be the expression for the density
Third expression is 20 g/cm^2 which also not have the unit of density.
Fourth expression is 5.13 kg/l which is having unit of density.
Therefore the expression of density will be 5.13 kg/l
We can determine the __________ of a wave when given the frequency and the wavelength.
amplitude
velocity
equilibrium
crest
Answer:
velocity
Explanation:
The relation between wave velocity, frequency and wavelength of a wave is given by
wave velocity = frequency x wavelength
So, as the frequency and wavelength is given we can find the wave velocity.
A car with a leftward velocity and a rightward acceleration is moving where ?
what physical properties of nylon and leather make them good materials to use for shoe laces?
what type of wave is a sound wave
A.transverse wave
B.longitudinal wave
C. light wave
D. elctromatic wave
Answer:
What wave is a sound wave?
For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.
Explanation:
while flying over the grand canyon the pilot
i do not know why but the answer is 684 please let me know why. A light with a second-order dark band forms a diffraction angle of 20.0°. The diffraction grating has 200.0 lines per mm.
The wavelength of the light, to the nearest whole number, is nm.
Final answer
The wavelength of the light, to the nearest whole number, is 684 nm.
The formula for the diffraction grating is given by d sin( heta) = m extlambda, where d is the distance between adjacent gratings, heta is the angle of diffraction, m represents the order of the maximum, and extlambda is the wavelength of the light. For a grating with 200.0 lines per mm, the distance d is the inverse of the number of lines per meter, which is 1/(200,000) meters or 5 x 10^-6 m. The given second-order dark band (m=2) forms at a 20.0°(diffraction angle). Using these values in the diffraction grating equation, solving for extlambda yields a wavelength of approximately 684 nm. This can be calculated as follows: 5 x 10^-6 m * sin(20.0°) = 2 extlambda, leading to extlambda approximately equals 684 nm after computation.
While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration.
To calculate the car's acceleration, we convert the initial speed of 60 mph to 26.8 m/s and the final speed of 30 mph to 13.4 m/s. Using the acceleration formula (final velocity minus initial velocity divided by time), the acceleration is found to be [tex]-0.0186 m/s^2[/tex] over the 720 seconds (12 minutes), indicating that the car is decelerating.
To calculate the acceleration of the car, we first need to convert the speeds from miles per hour to meters per second (m/s). Since the car slows down, the acceleration will be negative. The initial speed is 60 mph, which is equivalent to 60 imes 1609/3600 m/s or approximately 26.8 m/s. The final speed is 30 mph, which is equivalent to 30 1609/3600 m/s or approximately 13.4 m/s. The time taken to slow down is 12 minutes, which is 12 60 seconds or 720 seconds. Now we use the formula for acceleration, which is a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time taken. Thus, the acceleration a is (13.4 m/s - 26.8 m/s) / 720 s = [tex]-0.0186 m/s^2[/tex]. The negative sign indicates that the car is decelerating.