Bettina spoke into a microphone during the school play to increase the sound of her voice so the audience could hear her speak. The loudness of Bettina's voice was changed by what type of energy?

The Momentum of a man riding his bicycle downhill can be calculated. The bicycle and the man have a combined mass of 40 Kg. The velocity of the bicycle is 10 m/s. Calculate the momentum.

Assuming 70% of Earth's surface is covered in water at an average depth of 2.5 mi, estimate the mass of the water on Earth in Kilograms.

What's something that I've done in my life that is related to physics

What is a secondary color of light? A. It is a combination of a primary color with any other color. B. It is a shade of a primary color. C. It is a combination of two primary colors. D. It is any color except red, green, or blue.

Explain how the color of a star is related to its temperature

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?

Which movies are longer than 2 hours?