Gas flows away from the Sun in the _______________, which can be considered an extension of the corona
Fill in the blank(s) with correct word
solar wind
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Lenz's Law: As shown in the figure, two solenoids are in line. The switch S, initially closed, is suddenly opened. Just after opening S, what is the polarity of the induced emf in terminals X and Y?
A. X and Y are at the same potential. B. X is positive and Y is negative. C. Y is positive and X is negative.
A ball is tied to the end of an 80.0-cm string and swings in a vertical circle about a fixed center under the influence of gravity. The speed of the mass at the bottom of the swing is 6.00 m/s. Which of the following statements is true?
A) The ball does not have enough energy to reach the top of the circle. B) The ball has enough energy to reach the top of the circle but the string becomes slack before it can reach that point. C) The ball has enough energy to continue revolving in a complete vertical circle. D) This question cannot be answered without knowing the mass of the ball. E) This question cannot be answered without knowing the tension in the string.
During this century, we have found that Newton's physics does not apply to
A) high speed objects. B) very strong gravitational forces. C) very small objects. D) All of the above. E) Nonsense--Newton's physics always applies.
Heavy nuclei are unstable because
a. each nucleon is a separate particle that is not acted on by the nuclear force. b. there are not enough protons present relative to the number of neutrons for the electrical force to be strong enough. c. the nuclear force dominates the Coulomb repulsive force at distances less than 2 fm, but falls off rapidly at greater distances. d. nuclei are stable only when the number of neutrons equals the number of protons. e. nuclei are stable only when the number of protons exceeds the number of neutrons.