A student walks from one end of a 50 m long cafeteria and back again in 55 s. a. What is the student’s displacement?
b. What is the student’s distance traveled?
c. What is the student’s average velocity?
d. What is the student’s average speed?

Arock collection comes from which part of earth?

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.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples