1. Which of the following statements best describes the field of relativity? a. The branch of physics dealing with heat and temperature.
b. The branch of physics dealing with electricity and magnetism.
c. The branch of physics dealing with nuclear energy and high speed particles
d. The branch of physics dealing with vibrations and sound.

Why do astronauts in the space shuttle weigh less?

Does heating a metal wire increase or decrease its electrical resistance? why?

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 = 2.6 m below the tank bottom which is a = 6.7 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). report your answer in meters to two decimal places.