Explain why machines are never 100% efficient.

What would happen if you took a really strong metal box and you started teleporting in hundreds and hundreds of small cotton balls until there is no space left and when you are 100% sure there is no more space left u teleport in a small metal ball.

A 1.31 kg flower pot falls from a window. What is the momentum of the pot when it has fallen far enough to have a velocity of 2.86m/s? 00.458 kgm/s 06.35 kgm/s O 3.75 kgm/s 02.18 kgm/s

If a wave is traveling at a constant speed, and the frequency decreases, what would happen to the wavelength? A) It would increase B) It would decrease C) It would remain constant D) It would drop to zero

If an object has a lot of momentum, what statement best characterizes the object?

Which of the following is the correct definition of radiation? A. the electromagnetic radiation from the surface of an object which is due to the object's temperature B. the transmission of heat across matter C.

Object dropped from height of 25 meters, what velocity will it hit the ground?

How can the time period of a pendulum be decreased or increased

A space probe is sent to the vicinity of the star Capella, which is 42.2 light-years from the earth. (A light-year is the distance light travels in a year.) The probe travels with a speed of 0.9930c.

ngrid kicks a football with an initial velocity of 12 m/s at an angle of 45° relative to the ground. The horizontal component of the initial velocity to the nearest tenth is m/s.

A 60-watt light bulb has a voltage of 120 volts applied across it and a current of 0.5 amperes flows through the bulb. What is the resistance of the light bulb?