Neutron stars were first discovered in the 1930's
Indicate whether the statement is true or false
F
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A traveler pulls on a suitcase strap at an angle 36° above the horizontal. If of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?
A) 75 N B) 61 N C) 85 N D) 92 N
On a two-lane highway (not divided), a car headed north experiences a centripetal acceleration directed toward the west. Simultaneously, a truck passes the car, headed south in the other lane. The direction of the centripetal acceleration on the truck is
A. north. B. east. C. south. D. west.
Which of the following are not produced by streams?
A) floodplains B) deltas C) moraines D) alluvial fans
A boxcar without a front or a back is moving toward the right. Two flashes of light move through the boxcar, one moving from back to front toward the right, the other moving from front to back toward the left. A passenger in the boxcar records how long it takes each flash of light to pass from one end of the boxcar to the other end. According to the passenger, which took longer?
a. the flash going from back to front b. the flash going from front to back c. They both took the same time. d. It depends on whether the passenger is sitting at the front or the back of the boxcar.