Decreasing pressure on a gas will cause its volume to increase, as it isn't being forced into a smaller space. Increasing temperature causes the atoms in the gas to contain more energy, making them move around more. This too increases the volume.
So basically both would increase the volume of the gas. Hope this helps
The force required for the car is 5841 N
Explanation:
First of all, we need to find the acceleration of the car, which is given by:
where:
v = 27 m/s is the final velocity of the car
u = 0 is the initial velocity (the car starts from rest)
t = 6 s is the time the car takes to accelerate from u to v
Substituting, we find
Now we can find the force needed to accelerate the car; using Newton's second law of motion,
where:
F is the net force on the car
m = 1298 kg is the mass of the car
is the acceleration
Substituting, we find:
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The gravitational acceleration on the surface of planet A is:
where G is the gravitational constant,
is the mass of planet A and
its radius.
Similarly, the gravitational acceleration on the surface of planet B is:
The ratio between the gravitational acceleration on planet A and B becomes:
The problem says that the two masses are equal:
while planet A has 3 times the radius of planet B:
. Substituting into the ratio, we get:
so, gravity on planet B is 9 times stronger than planet A.
B: The black hole does not give off mass, it only becomes smaller and denser. Hence why the gravity is so strong.
Answer:
frictional force causes an object to slow down