With what speed in miles/hr(1 m/s = 2.23 mi/hr) must an object be thrown to reach a height of 91.5 m (equivalent to one football field)? assume negligible air resistance.

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?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?