Which of the following physical occurrences fit the physical definition of an event?
A. The collision of two point particles
B. A point particle passing a given point in space
C. A firecracker explosion
D. A party at your dorm E. A hurricane
F. A, B, and C
T. Any of the above could be an event, depending on the reference frame’s scale and/or how precise the measurements need to be.
T. Any of the above could be an event, depending on the reference frame’s scale and/or how precise the measurements need to be.
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Film behind a double slit is exposed to light in the following way: First one slit is opened and light is allowed to go through that slit for time ?t. Then it is closed and the other slit is opened and light is allowed to go through that slit for the same time ?t. When the film is developed the pattern will be
a. one single slit pattern. b. two superimposed single slit patterns, their centers displaced from each other by the distance between the two slits. c. one double slit pattern. d. two double slit patterns, their centers displaced from each other by the distance between the two slits. e. random darkening of the film. (no pattern at all)
How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0 s?
a. 0.22 kJ b. 0.20 kJ c. 0.24 kJ d. 0.27 kJ e. 0.31 kJ
Valley networks are located in Mars's northern hemisphere
Indicate whether the statement is true or false
The rotation curve of a galaxy is displayed as a plot of
a) gravity vs. distance to galaxy center b) rotation velocity vs. distance from Earth c) period of rotation vs. distance from Earth d) redshift vs. blueshift e) rotation velocity vs. distance to galaxy center