Alice and jim calculate that they must do 1,800 j of work to push a piano up a ramp. however, because they must also overcome friction they actually must do 2,400 j of work. what is the efficiency of the map

If you can hit a golf ball 230 m on Earth, how far can you hit it on the Moon?

Power can be defined as A. the distance over which work was done. B. how much work can be done in a given time. C. all the work in an given area. D. the energy required to do work.

Calculate the acceleration of a bus whose speed changes from 6 m/s to 12 m/s over a period of 3s.

The mass of a string is 5.40 10-3 kg, and it is stretched so the tension in it is 215 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string

If a 2 kg ball is at the edge of a 40 meter cliff and falls off, how much kinetic energy will the ball have when it hits the ground?

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?