How does changing the initial mass of the copper affect how much heat energy it has?

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)

As the distance from a magnet increases, what happens to the magnet force?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?