What is the magnitude of the free-fall acceleration at a point that is a distance 2R above the surface of the Earth, where R is the radius of the Earth?
a. 4.8 m/s2
b. 1.1 m/s2
c. 3.3 m/s2
d. 2.5 m/s2
e. 6.5 m/s2
B
Physics & Space Science
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A helium nucleus is accelerated from rest through a potential difference V to a kinetic energy of 3.2 
What is V?
A. 1.0 MV B. 2.0 MV C. 1.6 MV D. 3.2 MV E. 0.51 MV
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The Big Bang produced all the observed helium that we see today.
Answer the following statement true (T) or false (F)
Physics & Space Science
A 50-? resistor is placed in series with a 40-mH inductor. At what frequency will the current in this circuit lag the applied voltage by exactly 45°?
What will be an ideal response?
Physics & Space Science
Which requires more work, increasing a car's speed from 0 mph to 30 mph or from 50 mph to 60 mph?
A) 0 mph to 30 mph B) 50 mph to 60 mph C) It is the same in both cases.
Physics & Space Science