Sputnik I was launched into orbit around Earth in 1957
It had a perigee (the distance from the point of closest approach to the center of Earth) of 6.61 × 106 m and an apogee (the distance from the furthest point in the orbit to the center of Earth) of 7.33 × 106 m. Its mass was 83.5 kg. What was the difference in kinetic energy as it moved from perigee to apogee? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2.
A) 8.27 × 107 J
B) 6.44 × 107 J
C) 1.93 × 108 J
D) 3.50 × 108 J
E) 4.94 × 108 J
E
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The base metal in most jet-engine turbine blades is ______________.
Fill in the blank(s) with the appropriate word(s).
A fluid is flowing with an average speed of 1.50 m/s through a tube that has a radius of 2.00 mm and is 18 cm long. The drop in pressure is 967 Pa. What is the viscosity of the fluid?
A) 0.00179 Ns/m2 B) 0.00562 Ns/m2 C) 0.0278 Ns/m2 D) 0.0134 Ns/m2 E) 0.00335 Ns/m2
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A. 3.93 × 103 kg/m3 B. 2.73 × 103 kg/m3 C. 2.70 × 103 kg/m3 D. 2.67 × 103 kg/m3 E. 2.64 × 103 kg/m3
Suppose that you place a loop with its face perpendicular to a uniform magnetic field. If the magnetic field points directly at you as you look at the loop, in what direction does the induced current flow around the loop if the magnetic field is static.
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