The electric field between the plates of a parallel plate capacitor is inversely proportional to the plate separation
Indicate whether the statement is true or false
TRUE
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In a reflecting telescope the objective is a ____
a. prism b. mirror c. lens d. diffraction grating e. photographic plate
The net force on any object in equilibrium is
A) zero. B) equal to its weight. C) less than its weight. D) non-zero when motion is involved.
Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. Assuming there is no air resistance, the maximum height of Joe's ball will be
A) four times that of Bill's ball. B) two times that of Bill's ball. C) equal to that of Bill's ball. D) eight times that of Bill's ball. E) roughly 1.4 times that of Bill's ball.
Ultrasound is used
a. to form images of internal organs b. by bats to navigate c. in automatic focus cameras d. to control insects e. all of the above