A 770-kg boulder is raised from a quarry 106 m deep by a long uniform chain having a mass of 575 kg . This chain is of uniform strength, but at any point it can support a maximum tension no greater than 2.80 times its weight without breaking. What is the maximum acceleration the boulder can have and still get out of the quarry?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

What kind of simple machine is a catapult?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?