Which of the following planets is an example of a Terrestrial planet?
A) Uranus
B) Venus
C) Jupiter
D) Neptune
B
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Magnetism had been a known phenomenon for some time before its relation to electric currents was found. That a current in a wire produces a magnetic field was discovered by:
a. Ampere. c. Ærsted. b. Maxwell. d. Tesla.
The most common form of lightning strike from a cloud to the ground involves negative charge moving from the cloud to the ground. Just before a lightning strike,
A. the electric field must point toward the sky. B. the potential must be larger near the cloud. C. there are no charges on the ground. D. the potential energy of the electrons in the cloud must be small.
Recall the raisin cake model of the universe and its analogy to our expanding universe. Suppose you measure the recession velocity (the speed at which any object is moving away from us) of Galaxy A to be 2000 km/s and the recession velocity of Galaxy B to be 6000 km/s. What can you conclude about the relative distances of these two galaxies?
A) Galaxy A is 3 times as far from us as Galaxy B. B) Galaxy B is 3 times as far from us as Galaxy A. C) Galaxy A is 6 times as far from us as Galaxy B. D) Galaxy B is 6 times as far from us as Galaxy A. E) The relative distances cannot be determined from the information in this problem.
A canteen that is wet on the outside results in water inside that is
A) warmer. B) cooler. C) both of these D) neither of these