What is the magnitude of the vector described below? "75 mph to the north"
A. 75 mph
B. North
O C. Miles per hour
O D. Hours

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.

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%