The Earth orbits around the sun. Which scenario would cause the greatest increase in gravitational forces between the 2 masses?
A- Double the distance between the Earth and sun
B- Reduce the distance between the Earth and the sun in half.
C- Double the Earth's size.
D- Reduce the sun's size by half.

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.

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

Which of these activities increases the amount of carbon in the atmosphere?