Find the terminal speeds in air of
(a) a steel ball bearing of diameter 3 mm,
(b) a 16-pound steel shot, and
(c) a 200-pound parachutist in free fall in the fetal position. in all three cases, you can safely assume the drag force is purely quadratic. the density of steel is about 8 g/cm 3and you can treat the parachutist as a sphere of density 1 g/cm 3 .

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?