Afootball player pushes against another player trying to block him from moving any farther down the field. which term best describes this example?

negative work
positive work
negative force
positive force

is it b or something else? ? i really need this to be right. you!

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.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

What causes the development of most clouds and precipitation in the atmosphere?