A 4-kg cat is resting on a bookshelf that is 2 m high. What is the cats gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8m/s^2?

a. 6 J

b. 8 J

c. 20 J

d. 78 J

alculate the kinetic energies of (a) a 2.00*103-kg automobile moving at 100.0 km/h; (b) an 80.0-kg runner sprinting at 10.0 m/s; and (c) a 9.10 * 10-31-kg electron moving at 2.00 * 107 m/s.

A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3.00 m long. What is the tension in each rope when the 700-N worker stands 1.00 m from one end?

A pair of 10 μf capacitors in a high-power laser are charged to 1.7 kv. how much energy is stored in each capacitor

Suppose an object is in orbit around the earth, the earth's gravitational pull some how becomes stronger than the objects forward motion, what will happen to the object?

The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 10 m radius of curvature. What is the car's speed at the bottom of the dip?

In most cases, a multicellular organism is not an exact copy of its parents because it

In the study that the FBI did on examining the physical characteristics of hair, what percentage of the "matches" were not really matches at all?

Evaporation only occurs at the surface of a liquid

Which of these substances has the highest pOH? 0.10 M HCl, pH = 1 0.001 M HNO3, pH = 3 0.01 M NaOH, pH = 12

A climber pulls herself 8 meters upwards with a force of 150 Newtons. If it takes her 16 seconds to cover the 8 meters, how much power is she using? A. 40 W B. 55 W C. 70 W D. 75 W