Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the machine?

A. 4%

B. 25%

C. 75%

D. 400%

How old can you be before you die

Frequency and velocity of a particle in simple harmonic motion Problem in that the amplitude is 0.24 in. and the maximum acceleration is 225 ft/s maximum velocity of the particle ist/s, and the frequency of its motion s z Print 20r

Calculate the average speed of Charlie who runs to the store 4 km away in 30 minutes

How much energy is required to change a 39.0-g ice cube from ice at - 14.0°c to steam at 108°c?

Which quantity refers most directly to the average molecular kinetic energy present in a substance? thermal energy temperature specificheat heat of fusion

If the diameter of the space station is 730 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80m/s2?

The act, process or state of the change in place or position oa a body with respect to time and relative to the observer is said to be : - 1. Rest 2. Stationary 3. Motion 4. None of the above

During a snowball fight two balls with masses of 0.4 kg and 0.6 kg, respectively, are thrown in such a manner that they meet head on and combine to form a single mass of 1 kg. the magnitude of intial velocity foreach is 15 m/s.

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2