Satellite Motion: A large telescope of mass 8410 kg is in a circular orbit around the earth, making one revolution every 927 minutes. What is the magnitude of the gravitational force exerted on the satellite by the earth? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 6.0 × 1024 kg)
Fill in the blank(s) with the appropriate word(s).
3.4 × 103 N
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Almost every action performed by a living cell is carried out by:
A) physical forces within each cell. B) chemicals it manufactures. C) gravitational forces within each cell. D) electric impulses transmitted by each cell.
A conducting rod (length = 80 cm) rotates at a constant angular rate of 15 revolutions per second about a pivot at one end. A uniform field (B = 60 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?
A. 2.7 V B. 2.1 V C. 2.4 V D. 1.8 V E. 3.3 V
Tritium (3H) decays to 3He releasing 18.6 keV of energy. How much mass is converted into energy during this process?
A.
B.
C.
D.
E.
An underwater scuba diver sees the Sun at an apparent angle of 45.0° from the vertical. How far is the sun above the horizon? (nwater = 1.333)
a. 19.5° c. 48.2° b. 68.0° d. 41.8°