If a bullet of mass 25 g moving with a velocity of 200 m/s strikes a wall and goes out from the other side with a velocity of 100 m/s. Find
the work done in passing through the wall.

If steel is more dense that lake water, why can a boat float

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume