What happens to the energy "lost" by a machine?

a. it is recycled by the machine

b. energy is never lost by machines

c. it goes into the environment

What effect did the internal combustion engine have on transportation?

An object with mass 110 kg moved in outer space. When it was at location its speed was 19.5 m/s. A single constant force N acted on the object while the object moved to location m. What is the speed of the object at this final location

Lead-202 has a half-life of 53,000 years. How long will it take for 15/16 of a sample of lead-202 to decay? A) 106,000 years B) 159,000 years C) 212,000 years D) 265,000 years

T = mg + ma solve for a

How can you prove to be an initiator?

What causes standing wave?

If you lived downhill from a volcano and lava started to flow toward your home what could happen?

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed.

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.