When projected through a single lens, the image of a movie on a screen is
A. real and inverted.
B. virtual and inverted.
C. real and upright.
D. virtual and upright.
E. virtual and enlarged.
A. real and inverted.
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A particle starts from the origin at t = 0 with a velocity of 6.0
m/s and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the particle achieves its maximum positive x coordinate, how far is it from the origin?
A. 36 m B. 20 m C. 45 m D. 27 m E. 37 m
X rays are used in radar
a. True b. False Indicate whether the statement is true or false
The Celsius degree is
a. the same size as the Fahrenheit degree. b. larger than the kelvin. c. the same size as the kelvin. d. smaller than the Fahrenheit degree.
Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude F due to the other. With time, charge gradually leaks off of both spheres
When each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be A) 1/16 F. B) 1/8 F. C) 1/4 F. D) 1/2 F.