Which of the following, by scientific definition is NOT work? lifting boxes of books, pedaling on your bike, holding a book over your head, pushing a chair across the room​

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?