If a satellite's radial velocity is zero at all times, its orbit must be
A) parabolic.
B) elliptical.
C) circular.
D) geosynchronous.
Answer: C
Physics & Space Science
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The sound of a jet engine is given as 120 dB. What is the intensity of the jet sound wave?
A. 1.0 W/m2 B. 0.8 W/m2 C. 0.6 W/m2 D. 0.4 W/m2 E. 0.2 W/m2
Physics & Space Science
An ice skater has a moment of inertia of 5.0 kg ? m2 when her arms are outstretched, and at this time she is spinning at 3.0 rev/s
If she pulls in her arms and decreases her moment of inertia to 2.0 kg ? m2, how fast will she be spinning? A) 2.0 rev/s B) 3.3 rev/s C) 7.5 rev/s D) 10 rev/s
Physics & Space Science
Consider the two systems below, labeled A and B
A B
Which gas has the higher pressure?
Physics & Space Science
Leptons are built out of quarks
Indicate whether the statement is true or false
Physics & Space Science