I walk six miles in a straight line in a direction north of east, and I end up four miles north and several miles east. How many degrees north of east have I walked?
a. 19° b. 42°
c. 60° d. 71°
b
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Astronomy and astrology were often practiced together in ancient cultures, and astrology played an important role in the historical development of astronomy
Indicate whether the statement is true or false
Two boys in a canoe toss a baseball back and forth. What effect will this have on the canoe? Neglect (velocity-dependent) frictional forces with water or air
a. None, because the ball remains in the canoe. b. The canoe will drift in the direction of the boy who throws the ball harder each time. c. The canoe will drift in the direction of the boy who throws the ball with less force each time. d. The canoe will oscillate back and forth always moving opposite to the ball. e. The canoe will oscillate in the direction of the ball because the canoe and ball exert forces in opposite directions upon the person throwing the ball.
In nuclear fission,
A. a nucleus is split into two less massive nuclei. B. two heavy nuclei are induced to decay simultaneously. C. a nucleus is bombarded with another nucleus in order to induce an alpha decay. D. high-energy particles are released from a nucleus that is at rest.
A plane is moving due north, directly towards its destination. Its airspeed is 200 mph. A constant breeze is blowing from west to east at 40 mph. How long will it take for the plane to travel 200 miles north?
a. one hour c. less than one hour b. more than one hour d. more information is needed