Which of the following word pairs correctly completes the sentence below? Lightning forms when charges drop to the lower parts of a cloud and charges build up on the ground below.

What is work? how much work is done to move an object 0 meters?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?