Can energy be created or destroyed?

Which of the following is true of machines? A. Machines increase the amount of force required to do a task. B. Machines reduce the total amount of work required to do a task. C. Machines increase the total amount of work required to do a task. D.

Which of the following statements would not result in an eclipse

What happens when multiple forces act on an object?

What are the cracks between the plates of the lithosphere called

What are three examples of circular motion?

Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium.

If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be? answer: Unit:

35. An object of mass m moving at speed v0 strikes an object of mass 2m which had been at rest. The first object bounces backward along its initial path at speed v0.

Calculate the change in the canister pressure when the outside temperature changes from 72 ∘f to 80 ∘ f.