Approximately how many neutrinos pass through your body each second?
A) about 1023
B) about a thousand trillion
C) about one thousand
D) None; they are blocked by the Earth's atmosphere.
B
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Suppose you claim that you are feeling the effects of a gravitational field. How can you explain the fact that Al is weightless?
A) She is weightless because she is moving at constant velocity. B) She is weightless because she is in a free-float frame. C) She is weightless because she is in free-fall. D) If you are in a gravitational field, then she cannot be weightless.
In the Drude model of electrical conduction, the current density is directly proportional to
a. the average time interval between successive collisions. b. the number of charge carriers per unit volume. c. the square of the electron charge. d. the electric field present in the wire. e. the product of all four quantities listed above.
Many crops are grown to be bland-tasting but pretty to look at
What will be an ideal response?
Two lightbulbs both operate on 120 V. One has a power of 25 W and the other 100 W. Which lightbulb has higher resistance?
1.The dim 25-W lightbulb does. 2.The bright 100-W lightbulb does. 3.Both are the same.