A satellite orbits the Earth once every 6.0 hours in a circle. What is the acceleration of the satellite (direction too)?
What will be an ideal response?
1.4 m/s2 toward center of Earth
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A charged particle moving perpendicular to a magnetic field has a magnet force on it. But when an observer moves with the particle, so that the particle has a relative velocity of zero with respect to the observer, one would expect there would be no magnetic force. Yet there is still a force. If it is not a magnetic force, then what is the source of this force?
a. It is an electrical force. b. It is due to the ether. c. It is a gravitational force. d. It is something other than any of the above.
Superconductors can carry very large currents with no resistance. If a superconducting wire is formed into a solenoid of length 50.0 cm with 250 turns, what is the magnetic field inside the solenoid when the current is 104 A? (µ0 = 4p × 10^-7 T×m/A)
a. 12.6 T c. 1.25 T b. 2.50 T d. 6.28 T
Is gasahol a good idea? Explain
What will be an ideal response?
If you divide the total distance traveled on a car trip (as determined by the odometer) by the time for the trip, are you calculating the average speed or the magnitude of the average velocity? Under what circumstances are these two quantities the same?
A. We are calculating the average speed. The average speed and the acceleration will be the same if the movement is not in a straight line from beginning to end. B. We are calculating the average speed. The average speed and the average velocity will be the same if the movement is in a perfect straight line from beginning to end. C. We are calculating the instantaneous speed. The average speed and the instantaneous momentum will not be the same if the movement is in a perfect circle from beginning to end.