A 55 kg skater spins 12 m/s while carving a circle on the ice that has a radius of 6.0m. What net force must act on the skater to keep her in the circular path?

A refrigerator is used to cool water from 23°C to 5°C in a continuous manner. The heat rejected in the condenser is 570 kJ/min and the power is 2.65 kW. Determine the rate at which water is cooled in L/min and the COP of the refrigerator.

A 50 kg skydiver is falling downwards and accelerating 6 m/s2 down. What is the net force on the skydiver? 300 N, up 8.3 N, down 300 N, down 500 N, up

The specific volume of brass is 0.001865 ft3/lb. what would be its density

An oil drop with a mass of 8.3 grams and a charge of + 2.2 mC is floating 7.68 meters above a positively charged floor. What is the magnitude of the charge on the floor?

Which results in an increase in power? A - doing more work in less time? B - doing more work in more time? C - doing less work in more time? D-doing less work in less time?

If objects travelling at near the speed of light gain mass because their energy of their motion is being converted into mass, the does a photon gain mass?

16. The spreading of sound waves around openings in barriers is called A. reverberation. B. an echo. C. diffraction. D. refraction.

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called A. demographics. B. survey statistics. C. a secondary market. D. the target market.

What 4 things do all living organisms need to survive

A measure of the energy of motion of the particles in a substance is its