The Earth's gravity exerts no torque on a satellite orbiting the Earth in an elliptical orbit. Compare the motion of the satellite at the point nearest the Earth (perigee) to the motion at the point farthest from the Earth (apogee). At these two points:
a. the tangential velocities are the same.
c. the angular momenta are the same.
b. the angular velocities are the same.
d. the kinetic energies are the same.
C
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Propanol (C3H8O) is boiled in a container at 101 kPa and where the surface temperature is 120ºC. Its saturation temperature is 97.4ºC and its heat of fusion is 697 kJ/kg. Estimate the heat transfer per unit area.
What will be an ideal response?
Negative temperature coefficients of resistivity
A) exist in superconductors. B) do not exist. C) exist in semiconductors. D) exist in conductors.
A magnifying glass with focal length 15 centimeters is placed 12 centimeters above a stamp. (a) Where is the image? (b) What is the magnification? (c) Is the image produced a real or a virtual image?
The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. Assume a circular orbit
(a) What is the period of the International Space Station's orbit? (b) What is the speed of the International Space Station in its orbit?