Acertain satellite orbiting earth has a speed of about 17,000 miles/hour. what is its approximate speed expressed to the correct number of significant figures in kilometers/second? one kilometer is about 0.62 mile, and there are 3,600 seconds in an hour.

a.
2.9 km/s
b.
7.6 km/s
c.
38,000,000 km/s
d.
99,000,000 km/s

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

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.