What causes materials to have magnetic fields?

The Galilean moons are satellites of which planet?

A car is traveling at a constant velocity of 19 m/s when the driver puts on the brakes to accelerate it at - 1.4 m/s ^ 2 until stopped. How long in s) did it take the car to stop? answer must be a number only!

Kepler's second law states that the orbits of the planets are elliptical. the speed of a planet's orbit varies depending on which part of the ellipse it is occupying.

If all the hills are the same height, will the car make it to the end of the track

a bungee jumper of mass 50 kg jumps from a bridge using a 10 m long cord which can be approximated as a spring with spring constant 100 n/m. how far is he going to go below the bridge is he going to go before momentarily stopping

A plane is flying east at 135 m/s. The wind accelerates it at 2.18 m/s^2 directly northeast. After 18.0s, what is the magnitude of the displacement of the plane?

The same constant force, F, is applied to two blocks. The first block has a mass of M and the second block has a mass of 2M. Both blocks are initially at rest and the force acts on each of them for the same period of time, t.

Which of the following is an example of the strong nuclear force acting in an atom? A. A proton repelling a proton B. A neutron attracting a neutron C. A neutron repelling an electron D. An electron attracting a proton

Does the air in our atmosphere have mass?

Your instructor hands you a closed flask partly filled with room-temperature water. When you hold it, the heat transfer between your bare hands and the flask causes the water to boil. Quite impressive! How is this accomplished?