A boy throws a rock with an initial velocity of 3.13m/s at 30.0° above the horizontal. How long does it take for the rock to reach the maximum height of its trajectory if air resistance is negligibly small and g = 9.80 m/s2?
A) 0.160 s B) 0.441 s C) 0.313 s D) 0.282 s
A
You might also like to view...
Lilies in a certain pond double their total lake area covered every week. One day you notice that the pond is 1/8 covered with lilies. How long will it be before the pond is totally covered with lilies?
A) 3 weeks B) 8 weeks C) 6 weeks D) 4 weeks E) It is impossible to answer this without knowing the total area of the pond.
Galileo's observations of the entire phase cycle of Venus proved that Ptolemy's epicycles could not be correct in keeping Venus between us and the Sun
Indicate whether the statement is true or false
Careful measurements reveal that a star maintains a steady apparent brightness at most times, except that at precise intervals of 73 hours the star becomes dimmer for about 2 hours
The change in brightness alternates between a small change and a large change. The most likely explanation is that ________. A) the star is a member of an eclipsing binary star system B) the star is periodically ejecting gas into space, every 73 hours C) the star is a Cepheid variable D) the star is a white dwarf
Another name for a pulsar is ______________
Fill in the blank(s) with correct word