Austin does his Power lifting every morning to stay in shape. He lifts a 90 kg barbell, 2.3 m above the ground. a) How much energy does it have when it was on the ground? J

b)How much energy does it have after being lifted 2.3 m? J

c) What kind of energy does it have after being lifted?

d) How much work did Austin do to lift the barbell? J

e) If he lifted it in 1.9s, what was his power? W

Orange juice has a lower or higher viscosity than chocolate syrup

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?