True or flase? there are always clouds during the winter, so it is colder

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

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.