A motor with a power of 7.0 * 104 watts lifts a loaded elevator to a height of 20.00 meters for 40 seconds. What is the force exerted by the motor on the elevator?

Which of the following is closest to the speed of sound in air at sea level? a. 3 m/s b. 30 m/s c. 330 m/s d. 3300 m/s

The ecological footprint left by a citizen of a developed nation is about four times larger tan that left a citizen of a developing nation. why?

A 35 n object is on a 25 degree incline. the force of friction up the incline is 8.0 N. -What is the acceleration of the block? -What is the coefficient of kinetic friction?

How much heat must be removed from a 200-g block of copper to lower its temperature from 150 degrees c to 30 degrees c? the specific heat capacity of copper is 0.093 cal/g x c?

Which pair shows processes that are the reverse of one another? vaporization, sublimation evaporation, vaporization condensation, vaporization sublimation, evaporation

What does it mean when the orange light comes on for the anti-lock break? If it stays on what problem could it cause?

What is the relationship between matter and energy as it changes states of matter (phase changes?)

Television is becoming a more effective mass media outlet for advertising because so many more people own TV sets and have access to cable as well as satellite. A. True B. False

How to solve indices

The elements in group 17 of the periodic table are called halogens. all halogens have the same?