Nt1310 Unit 9 Study Guide

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1. A satellite is orbiting the earth. Which one(s) of the following variables will effect the speed of the satellite?
a. mass of the satellite
b. height above the earth's surface
c. mass of the earth
2. A satellite is in low-earth orbit at a height of 220 km above earth's surface. Given the following information, determine the orbital velocity of the satellite.
G = 6.67 x 10-11 Nm2/kg2
Mearth = 5.98 x 1024 kg
Rearth = 6.37 x 106 m
3. The Space Shuttle orbits the earth at 400 km above its surface. Use the information given in the previous question to determine the orbital velocity and the orbital period of the Space Shuttle.

4. Mimas is a moon of Saturn. The average orbital radius of Mimas is 1.87x108 m and its orbital period is approximately 23 hrs (8.28x104 s). Use the T2/R3 ratio to determine the mass of Saturn.

5. …show more content…
A satellite wishes to orbit the earth at a height of 100 km (approximately 60 miles) above the surface of the earth. Determine the speed, acceleration and orbital period of the satellite. (Given: Mearth = 5.98x1024 kg, Rearth = 6.37 x 106 m)

6. The total energy input required to put a satellite into an orbit of radius r around a planet of mass M and radius R id the sum of the gravitational potential energy (GMm[1/R-1/r]) and the kinetic energy of the satellite(½GMm/r).
Energy of launch = GMm[1/R – 1/2r] can be calculated from the given equation.
7. Give a definition for the followings terms:
• Astronomical satellites
• Biosatellites
• Communications satellites
• Miniaturized satellites
• Navigational
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