A block and tackle pulley system of 6 pulley uses 300N to overcome 1200N. find efficiency

Why don't lights turn green for both north and south bound traffic?

Studies show that the amount of heat stored in the ocean is increasing. what effect might this have? a. the water cycle might disappear. b. gyres might change direction. c. low tides might disappear. d. ocean currents might change course.

What did Thomson contribute to the model of atom A the neutron B the nucleus C. The electron cloud D the electron

Approximately what is the gravitational energy of a 100 kg person at the top of a 10 meter ladder?

Describe an example of each of Newton's laws of motion that you experience before you get to school in the morning. Include some of the forces involved in each situation.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?