Why isn't Earth a closed system

Agree or Disagree. The ozone hole devoloped over Antartica because the ozone layer there is thinner the over other parts of the earth? Give facts for your argument.

A toaster is plugged into an 120-volt outlet. If it has a resistance of 460 ohms, how much power does it use? A. 1,800 watts B. 3.8 watts C. 31 watts D. 55,000 watts E. 340 watts

What is the kinetic energy in a 50kg mass moving at 2.6 m/s

Deimos, a moon of Mars, is about 12 km in diameter; it has a mass of 2 x 1015 kg. With what speed would you have to throw a baseball on Deimos so that it would go into orbit and return to you so you could catch it? 5.8 m/s 4.7 m/s 2.2 m/s 3.4 m/s

Sam drives 8 miles west to the store in 10 min. Then he drives 5 miles west to the bank in 6 min. Finally he drives 2 miles east to school in 3 min. What was Sam's total distance traveled? (Give #, no unit)

A 2kg blob of putty moving at 4 m/s slams into a 6kg blob of putty at rest what is the speed of the to stick together blobs immediately after colliding

A stone is thrown vertically upward with a speed of 12m/s from the edge of a cliff 70 m high (a) How much later it reaches the bottom of the cliff? (b) What is its speed just before hitting? And (c) what total distance did it travel? (Ans: 5.

After completing a career search, Patrick has decided that he wants to be a paralegal. Which two skills or abilities are important for him to have in order to excel in this career?

The highest peak in the vicinity (<100 kilometers) of Mt. Kilimanjaro is located to the: a. north. b. west c. east. d. south. e. northeast

Which of the following lists contains only examples of renewable sources of energy? A. wind, tidal, geothermal, and hydroelectric B. coal, solar, wind, and biomass C. fossil fuels and nuclear energy D. hydroelectric, petroleum, solar, and wind