What is the net electrical charge on a magnesium ion that is formed when a neutral magnesium atom loses two electrons?

A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change? It increases to four times its original value. It increases to three times its original value. It decreases to one-fourth its original value.

A tall, open container is full of glycerine. At what depth h below the surface of the glycerine is the pressure 2170 Pa greater than atmospheric pressure? The density of glycerine is 1.26 * 10 3 kg/m 3.

30N of force is used to raise a box that weight 60N up an incline plane. What is the mechanical advantage of the incline plane?

the rate at which an object moves

Ball 1, with a mass of 20kg, is moving to the right at 20m/s. At what velocity should Ball 2, with a mass of 40kg, move so that they both come to a stand still upon collision?

What is Nothing. (sorry i have been wondering this for a very long time)

What is the speed of a bobsled whose distance-time graph indicates that it traveled 123m in 28s?

Eric has a mass of 80 kgkg. He is standing on a scale in an elevator that is accelerating downward at 1.7 m/s2m/s2. What is the approximate reading on the scale?

Without the force of friction, people would not be able to walk.

A truck covers 40.0 m in 8.50 s while smoothly slowing down to a final speed of 2.80 m/s. (a) find its original speed. (b) find its acceleration.