Suppose the free-fall acceleration at some location on earth was exactly 9.8000 m/s2. What would it be at the top of a 1100-m-tall tower at this location?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.