A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)

What universal force is primarily responsible for keeping satellites in orbit around Earth? A) electromagnetic force B) strong nuclear force C) gravitational force D) weak nuclear force

a piece of metal with a mass of 15.3 grams has a temperature of 50.0°C. When the metal is placed in 80.2 grams of water at 21.0°C, the temperature rises by 4.3°C. What is the specific heat capacity of the metal?

2. r represents the radius d the density, v the speed and the coefficient of viscosity, then the quantity rdv/has the dimensions of b. length c. time d. force

In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 99.0 km/h, to his enemy's car, which is going 124 km/h. the enemy's car is 16.9 m in front of the hero's when he lets go of the grenade.

It requires 0.30 kJ of work to fully drive a stake into the ground. If the average resistive force on the stake by the ground is 828 N, how long is the stake?

If the weight is 950 newtons, what is the mass?

You are standing against the wall near a corner of a large building. A friend is standing against the wall that is around the corner from you. You can't see your friend. How is it that you can hear her when she talks to you?

What is general relativity in easy terms?

Temperature and volume are directly or inversely

My Notes A basketball rolls across a classroom floor without slipping, with its center of mass moving at a certain speed. A block of ice of the same mass is set sliding across the floor with the same speed along a parallel line.