A student places two charged objects in your each other. The objects repel each other. The student concludes that the object must both the negative. Do you agree? Explain.

Which of the following is not a good approximation of the relationship between independent and dependent variables? A. independent: first, dependent: next B. independent: input, dependent: output C. independent: cause, dependent: effect D.

A 50.0-kg box is resting on a horizontal floor. a force of 250 n directed at an angle of 32.0° below the horizontal is applied to the box.

If you want to change the pitch of a sound, you have to change the

Which substance is a combination of different atoms? O A. homogeneous mixture B. heterogeneous mixture C. element D. compound

What is the relationship between the buildup of electons and the sudden flow of electrons from one charged object to another?

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?