When a passenger in train A looks at a passenger directly across in train B it appears that train B is not moving even though both trains are moving. How does the speed od train A compare to train B

A balloon is filled with water. The balloon is heated and begins to expand. The water inside begins to turn into steam. What will happen to the mass of the balloon?

What kind of chemical bond is formed when electrons are transferred from atom to atom

If an object has a volume of 2.5mL and a mass of 10g than what is the density of an object?

You have a ball in your hand above the ground at rest which you then drop. What energy is involved in each part of this situation and how do we know that total mechanical energy has been conserved? Explain with and without air resistance present.

What type of evidence suggests that the North America and Africa used to be next to each other

A series of steps that allows someone to conduct an experiment are called a

A coach is hitting pop flies to the outfielders. if the baseball (m = 145 g) stays in contact with the bat for 0.04 s and leaves the bat with a speed of 50 m/s, what is the average force acting on the ball?

The two major ways to transfer charge between two objects are

When a wire loop is connected to a battery, what is produced in the loop?

A solid sphere of radius R has a total charge Q distributed evenly throughout its volume. What fraction of the total charge is located inside a radius R/2?