Me with this physics question?

a 12.0 kg steel block is resting on a horizontal table. the coefficient of static friction is 0.70. find the minimum force needed to start the block moving.

a) 35.3 n
b) 80.4 n
c) 82.4 n
d) 86.4 n

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

What causes the formation of ocean currents?

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?