A window washer stands on a scaffolding 30 meters above the ground. If he did 23,520 joules of work to reach the scaffolding what is his mass

Whats the difference between work and power

What is the percentage of the incoming solar radiation from the top of the atmosphere the gets reflected right back out into space (both from the atmosphere and the surface of Earth)

If the velocity of a sound wave is 330 m/s, what is the frequency of a wave which has a wavelength of 33 cm?

When balancing an equation, you can a. alter subscripts b. change the identities of the products c. change the identities of the reactants d. write in coefficients

What are the two requirements of an electric current?

In 2013, renewable energy provided 10% of the total energy used in the united states, and wind energy accounted for 17.4% of the renewable energy used. what percent of the total energy used in the united states in 2011was wind energy?

Because of which of the following can you see different colors?

If a car goes at a speed of 80 kph in 10 seconds, what is the distance

An unknown material has a mass of 5.61 kg, and its temperature increases by 0.124°C when 1320 J of heat are added. What is the specific heat of the material? (Unit = J / (kg*C))

What is it called when your tv goes fuzzy?