Two objects are dropped from a bridge, an interval of 1.0 s apart, and experience no appreciable air resistance. As time progresses, the DIFFERENCE in their speeds
A) increases.
B) remains constant.
C) decreases.
D) increases at first, but then stays constant.
E) decreases at first, but then stays constant.
Answer: B
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The number of neutrons in a triton is ______________
Fill in the blank(s) with correct word
The principle of operation of a Geiger counter is:
a. Radiation strikes the metal coating of the Geiger tube, causing a clicking sound on impact that is amplified. b. Radiation ionizes a gas and triggers an avalanche effect of ion generation that allows a current to flow. c. Radiation is bounced back and forth from the sides of the Geiger tube, producing a signal each time it strikes the walls. d. Radiation strikes fluorescent material coating the insides of the tube, and a photoelectric cell detects the flashes of light that result. e. Radiation produces a visible track inside the Geiger tube, which is detected by a photocell.
Uniform Circular Motion: You are making a circular turn in your car on a horizontal road when you hit a big patch of ice, causing the force of friction between the tires and the road to become zero. While the car is on the ice, it
A. moves along a straight-line path away from the center of the circle. B. moves along a straight-line path toward the center of the circle. C. moves along a straight-line path in its original direction. D. continues to follow a circular path, but with a radius larger than the original radius. E. moves along a path that is neither straight nor circular.
Molecular clouds are mapped using CO instead of hydrogen because CO is much more abundant than hydrogen in molecular clouds
Indicate whether the statement is true or false