A particle of interplanetary dust is close to the Sun and interacts with the Sun's gravitational field as well as with the light emitted by the Sun
If it only interacts appreciably with the Sun, can it be pushed away from the Sun instead of being pulled towards it? A) No, the gravitational force will always dominate if the object is large enough.
B) No, the gravitational force will always dominate if the object is close enough.
C) Yes, if the object is small enough, radiation pressure will win over.
D) Yes, but the object must be very large so that it can gain enough radiation pressure.
E) None of the previous answers is correct.
C
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The figure shows the position of an object (moving along a straight line) as a function of time. Assume two significant figures in each number. Which of the following statements about this object is true over the interval shown?
A) The object is accelerating to the left. B) The object is accelerating to the right. C) The acceleration of the object is in the same direction as its velocity. D) The average speed of the object is 1.0 m/s.
The length of a certain wire is doubled and at the same time its radius is reduced by a factor of 2. What is the change in the resistance of this wire?
A) It is doubled. B) It is quadrupled. C) It increases by a factor of 6. D) It increases by a factor of 8. E) It is reduced by a factor of 2.
A ball rolls off the edge of a table at the same time another ball drops vertically from the same table. The ball to hit the floor first is the
A) rolling ball. B) dropped ball. C) both hit at the same time
What current in a solenoid 15.0-cm long wound with 100 turns would produce a magnetic field equal to that of the Earth, 5.00 × 10?5 T?
What will be an ideal response?