The fact that one side of the Moon always faces Earth is evidence that while revolving about the Earth it
A) does not rotate about its axis.
B) rotates about its axis.
Answer: B
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The figure shows the speedometer readings as a car comes to a stop. Solve graphically for the acceleration at t = 7.0 s.
A. 2.5
B. - 2.5
C. - 2.0
D. 2.0
A radar pulse sent out to an airplane at a distance of 24.9 km will return as an echo to the source in what time interval? (c = 3.00 × 10^8 m/s)
a. 3.33E–5 s b. 8.30E–5 s c. 1.66E–4 s d. 4.15E–5 s e. 4.98E–4 s
A galvanometer has an internal resistance of 100 ? and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA,
and how should this resistor be connected to the galvanometer? A) 50.0 ? in series with the galvanometer B) 50.0 ? in parallel with the galvanometer C) 75.0 ? in parallel with the galvanometer D) 100 ? in parallel with the galvanometer E) 100 ? in series with the galvanometer
A metal sphere of radius 2.0 cm carries a charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere?
What will be an ideal response?