An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.0 s after firing. If x is horizontal and y vertical, find the (x, y) coordinates where the shell explodes
7.22 km, 1.68 km
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Answer the following statement(s) true (T) or false (F)
1. In a maximally efficient heat engine, the amount of entropy that the hot reservoir loses as heat flows out of it is exactly balanced by the entropy that the cold reservoir gains as the waste heat flows into it.
Pluto is different from the outer planets in all of the following ways except which one?
A) Its surface temperature is very cold. B) It is made mostly of ices. C) Its orbit is not very close to being circular. D) It has few moons. E) It doesn't have rings.
Which object has zero acceleration?
A) one at rest B) one moving at constant velocity C) one in mechanical equilibrium D) all of the above E) none of the above
A hunter points a rifle horizontally and holds it 3.30 m above the ground. The bullet leaves the barrel at 325 m/s and experiences no significant air resistance. The acceleration due to gravity at this location is 9.80 m/s2
(a) How long does it take for the bullet to strike the ground? (b) How far horizontally does it travel?