How could some chemical changes be reversed?

A ball falling though the air has?

How does variation in the measuring device (instrument) effect the measurements obtained on a component?

While running, you need to transfer 290 J/s of thermal energy from your body to the moisture on your skin in order to remain at the same temperature. What mass of perspiration must you evaporate each second?

A tight metal lid on a glass jar of jam may loosen if the lid is held under hot water for few minutes. This is because the water causes the?

A block of an unknown metal has a mass of 145 dg and a volume of 2.3 cm3. what is the density of the unknown in units of g/ml?

Which is a use of fiber optics?

When a positively charged conductor touches a neutral conductor, the neutral conductor will:

Definition of the rule E=mc^2

A 3.7 kg block is pushed along a horizontal floor by a force modifyingabove upper f with right-arrow of magnitude 25 n at a downward angle θ = 40°. the coefficient of kinetic friction between the block and the floor is 0.26.

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain