For a northern Hemisphere observer the __________ __________ moon is visible in the south-eastern sky just after sunset
Fill in the blank(s) with correct word
waxing gibbous
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A given rope will break if its tension exceeds 360 N. Suppose that each of two people can exert a pull of 200 N. Which strategy below can they use to break that rope?
A. They each take an end and pull. B. They tie one end to the wall and both pull on the other. C. They use either of the strategies above. D. They cannot break the rope.
Increasing the spring constant k of a mass-and-spring system causes what kind of change in the resonant frequency of the system? (Assume no change in the system's mass m.)
A) The frequency increases. B) The frequency decreases. C) There is no change in the frequency. D) The frequency increases if the ratio k/m is greater than or equal to 1 and decreases if the ratio k/m is less than 1. E) The frequency increases if the ratio k/m is less than or equal to 1 and decreases if the ratio k/m is greater than 1.
The overall result of the proton-proton chain is ________
A) 6 H becomes 1 He + energy B) p + p becomes 2H + energy C) 4 H becomes 1 He + energy D) individual protons are joined into long chains of protons
Which of the following is not considered a fundamental particle?
A) a proton B) an electron C) an up quark D) a neutrino