Which of the following is an example of work being done on an object?

A-Water in a pot changes into steam.

B-A man pushes a couch across the room.

C-A prism scatters ultraviolet light into visible light.

D-A box rests on the floor.

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

What is true of systems in terms of their size and boundaries?

Which can hold more water, warm or cold air?

You wish to use phasor notation to convert V 100 cos (100t 30°) 5 sin (100t - 40) into a single sinusoidal function. Which of the following functions are equivalent to the phasor form of V? a. 95.3228.97 1002300+52 (-130°) b. 83.

2. A man walks 38 m west from home, rest, then walks 20 m east. What is the man's displacement?

How much heat is contained in 100 kg of water at 60.0 °C?

Which of the following statements is the best definition of weather? Weather is the current conditions in the atmosphere. Weather is the usual conditions in the atmosphere. Weather is the average conditions in the atmosphere.

Analyze: In the series circuit what characteristic was common throughout the experiment? What changed as you added more light bulbs?

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

In Part A, you determined that the heat added to the coffee is what you got. If it takes 4.2 J of energy to raise the temperature of 1.0 mL of coffee by 1.0∘C, then it should take twice as much energy to raise the temperature of 2.