Support a horizontal toothpick at both ends. Then do likewise for a log of the same kind of wood. There is more sag in the
A) toothpick.
B) log.
C) same in each
Answer: B
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A projectile is thrown horizontally at 11.5 m/s. The projectile hits the ground 0.570 s later. What is the angle of impact the projectile makes with the horizontal ground?
a. –29.1° b. –25.9° c. 119° d. –89.7° e. –64.1°
Standing Sound Waves: A standing wave of the third overtone is induced in a 1.2-m pipe that is open at one end and closed at the other end. The speed of sound in the pipe is 340 m/s. (a) How many antinodes are there in the standing wave pattern?(b) What is the frequency of the sound produced by the pipe in this situation?
Fill in the blank(s) with the appropriate word(s).
In a spectroscopic binary system, the star showing the larger blue shift is:
A) cooler and receding the fastest. B) less massive of the pair and receding slower. C) more massive and approaching us. D) less massive and approaching us at this moment. E) hotter and receding faster.
At the Mars Pathfinder landing site, the surrounding rocks are scattered and stacked against each other. This suggests that the spacecraft landed in
A) an area of explosive volcanic activity B) an ancient floodplain C) an area subjected to wind erosion D) the debris from a giant impact