You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 6 cm wide but still 5 mm high. You must move your hand up and down once,
a. the same distance up as before, but take a shorter time.
b. the same distance up as before, but take a longer time.
c. a smaller distance up, but take a shorter time.
d. a greater distance up, but take a longer time.
e. a greater distance up, but take the same time.
b
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The Moon appears larger when it rises than when it is high in the sky because
A. it's brighter when it rises. B. you are closer to it when it rises (angular-size relation). C. it's an illusion from comparison to objects on the horizon. D. you are farther from it when it rises (angular-size relation).
Nonmetals produce negatively charged ions,
which are referred to as a) lone pairs. b) cations. c) polar ions. d) anions.
A 25-g traffic light hangs midway on a cable between two poles 40 meters apart. If the sag in the cable is 0.40 meters, what is the tension in each side of the cable?
a. 12,200 N c. 4900 N b. 9800 N d. 6100 N
You see colors in a rainbow because of diffraction
Indicate whether the statement is true or false