Mass is the weight of an object

An object has a kinetic energy ke, and potential energy pe. it also has a rest energy e0. what is the object's total energy e?

An observer on Earth measures the length of a spacecraft travelling at a speed of 0.700c to be 78.0 m long. Determine the proper length of the spacecraft.

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. the acceleration of gravity is 9.8 m/s 2. if her speed is 430 m/s at this time, find the radius of the loop. answer in units of km.

Do microwaves require a medium to travel through

An ambulance travels down a high way at a speed of 75.0 mi/h, its siren emitting sound at a frequency of 400 Hz. What frequency is heard by a passenger in a car travelling at 55.

What is the final velocity of a rocket that is traveling at 205 m/s and accelerates at 8.03 m/s2 while moving 1750 m?

Is it possible to get a bruise inside your body?

he Period refers to the time it takes an individual particle (or coil) to complete one back and forth vibration about its fixed position. Contrast a low period set of continuous vibrations with a high period set of continuous vibrations.

The velocity - time graph of a ball of mass 25g moving on road is as given below: (a) How much force does the road exert on the ball to bring it to rest? (b) What is the direction of the force exerted by the road?

An explosion that destroys a massive star is called a A. nebula. B. black hole. C. vacuum. D. supernova.