When a 12 volt car battery is short circuited with a wire, the current drawn from the battery is 100 amperes. The resistance of the wire is
a. zero
b. 0.12 ohms
c. 100/12 = 8.33 ohms
d. 1200 ohms
e. none of the above
B
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A(n) ____________________ uses a mirror as its objective
Fill in the blank(s) with correct word
Energy Conservation With Conservative Forces: Two identical grasshoppers jump into the air with the same initial speed and experience no air resistance. Grasshopper A goes straight up, but grasshopper B goes up at a 66° angle above the horizontal. Which of the following statements about these grasshoppers are correct? (There could be more than one correct choice.)
A. At their highest point, both of them have the same amount of gravitational potential energy. B. At their highest point, both of them have the same amount of kinetic energy. C. At their highest point, both of them have the same amount of mechanical energy. D. At their highest point, grasshopper B is moving faster than grasshopper A. E. At their highest point, grasshopper A has more gravitational potential energy than grasshopper B.
What do we mean when we say the universe becomes transparent at 300,000 years after the Big Bang?
A: we can only see from one end of the universe to another if we existed before that time B: electromagnetic radiation (light) can travel freely through the universe so we can see to large distances C: Helium nuclei formed then and since they are transparent it was possible to see to larger distances D: protons and neutrons formed then and since they are transparent it was possible to see to larger distances E: the universe ends at that time
If we observe one edge of a planet to be redshifted and the opposite edge to be blueshifted, what can we conclude about the planet?
A) The planet is actually two bodies, one moving toward us, the other away from us. B) The planet is in the process of formation. C) The planet is in the process of falling apart. D) The planet is rotating.