Author Question: A crate is at rest on a horizontal floor, with nobody pushing. The friction force acting on the ... (Read 32 times)

danielfitts88 · **on:** Jul 29, 2018

A crate is at rest on a horizontal floor, with nobody pushing. The friction force acting on the crate is

A) zero.
B) equal to the weight of the crate.
C) between zero and the weight of the crate.
D) none of the above

Question 2

In a single-slit diffraction experiment, the width of the slit is 1.90 m. If a beam of light of wavelength 610 nm forms a diffraction pattern, what is the angle associated with the first minimum above the central bright fringe?

A) 9.35
B) 11.4
C) 12.2
D) 39.9
E) 18.7