You push on a large crate with 500N of force. After 2 minutes you are exhausted and the crate hasn't moved. How much did you accomplish in those 2 minutes? A. 1000 J
B. 500 J
C. 0 J
D. 4900 J

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.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

What is the speed of an object at a given moment?