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An object weighs 15N in air and 13N when submerged in water. What is the density of the object.

Find the density of a block that is less dense than water and held still 4.39 m underwater with a force of 0.855 N. When the object is in air, its weight is 0.585 N. (ANS: 406kg/m3)

When something adds up is it correct to say, The calculation checked out or checked up.

A 20 kg girl slides down a playground slide that's 3.2 m high. When she reaches the bottom of the slide her speed is 1.3 m/s. Assume any loss of energy is due to friction. If the slide is inclined at 20 degrees to the horizontal, what is the coefficient o...

A 13.8 g sample of a compound containing only N and O produced 4.2 g of nitrogen on decomposition. What is its empirical formula? What is its molecular formula if the molar mass of the compound is 92.0 g/mol