We describe a location on Earth's surface by stating its ________
A) latitude and direction B) latitude and longitude
C) altitude and direction (or azimuth) D) meridian and longitude
B
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What year did people on Earth see the Crab Nebula explode?
A.) 1993. B.) 1877. C.) 1054. D.) 108 B.C. E.) Around 2,300 B.C.
An 80-kg man is skating northward and happens to suddenly collide with a 20-kg boy who is ice skating toward the east
Immediately after the collision, the man and boy are seen to be moving together at 2.5 m/s in a direction 60° north of east. How fast was the boy moving just before the collision?
Suppose that the Sun were to collapse under its own gravitational pull
To what radius would it have to be reduced in order for the escape velocity to be equal the speed of light, 3.00 x 108 m/s? The mass of the Sun is 2.00 x 1030 kg and G = 6.67 x 10-11 N•m2/kg2. A) 2.96 km B) 1.48 km C) 1.52 km D) 2.10 km E) None of the other choices is correct.
Two blocks are accelerated across a horizontal frictionless surface as shown. Frictional forces keep the two blocks from sliding relative to each other, and the two move with the same acceleration. If F = 1.2 N and M = 1.0 kg, what is the horizontal component (frictional force) of the force of the large block on the small block?
A. 0.40 N to the left B. 0.80 N to the right C. 0.40 N to the right D. 0.80 N to the left E. 1.20 N to the left