Human activities that impact the water cycle
include

a. Use of toxic chemicals in agriculture and
manufacturing run-off
b. Pesticides that pollute surface water that seep into the ground
c. Clear cutting forests, which reduce the amount of water plants, transpire
d. All of the above

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation