An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm. What is the magnification produced by the mirror?
A) -0.50
B) -1.0
C) +1.5
D) -2.0
E) +1.0
B
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With what color light would you expect to be able to see the greatest detail when using a microscope?
A) blue, because it is brighter B) red, because of its long wavelength C) blue, because of its shorter wavelength D) red, because it is refracted less than other colors by glass E) The color makes no difference in the resolving power, since this is determined only by the diameter of the lenses.
For angular momentum to be conserved, the net force must be zero
Indicate whether the statement is true or false
When Eddie Electron experiences an electrical shock, the source of electrons composing the shock is
A) the ground beneath Eddie's feet. B) Eddie's body. C) the power plant. D) whatever electric device being handled. E) electric field in the air.
How does the macroscopic motion of a paper airplane affect the motion of the atoms that make up the piece of paper?
a. It has no significant effect. b. The random movement of the atoms that make up the paper is replaced by orderly movement in the direction the airplane is moving. c. The atoms all move in opposition to the direction the airplane is flying. d. The atoms continue to move randomly but in addition each has an added velocity contribution in the direction the airplane is flying. e. The motion in the opposite direction of the airplane no longer occurs.