How can we run out of energy if energy cannot be created or destroyed?

A gemstone is a hard, colorful mineral with a glassy or shiny luster. True or False?

An object with a mass of 70 kilograms is supported at a height 8 meters above the ground. whats the potential energy of the object with respect to the ground? ... A ... 560 J ... B ... 3,430 J ... C ... 5,488 ... D ... 2,058 J

Some studies suggest that the upper frequency limit of hearing is determined by the diameter of the eardrum. the wavelength of the sound wave and the diameter of the eardrum are approximately equal at this upper limit.

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.20 m/s^2. At the same instant a truck, traveling with a constant speed of 8.50 m/s, overtakes and passes the automobile.

Clem's credit score is 733, while Ingrid's credit score is 688. how much more would Ingrid have to pay per month than Clem?

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

In a harbor, you can see sea waves traveling around the edges of small stationary boats. Why does this happen?

Correct unit of speed

Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B says that rusted fasteners may be loosened by tapping with a hammer. Which technician is correct? a. technician A only b.

A roller coaster track is 3,000 meters long. It takes 100 seconds to travel once around the roller coaster. Is the velocity constant throughout the trip? Explain.