You are inside a jet plane moving at a constant velocity. You toss a rock straight up in the air, and then you keep your hand at the point of release. The rock will come down
A) in front of your hand.
B) in your hand.
C) behind your hand.
D) beside your hand.
E) Actually the rock won't come down.
B
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In contrast to the outer solid mantle, parts of the central regions of Earth's interior are thought to be fluid because
a. P seismic waves cannot make it through those regions. b. S seismic waves cannot make it through those regions. c. neither P nor S seismic waves can make it through those regions. d. both P and S seismic waves easily make it through those regions.
The scientific method is most effective in
A) making hypotheses. B) gaining, organizing, and applying new knowledge. C) discovering new things. D) making theories. E) performing experiments.
What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) in air if the film is 288 nm thick?
a. 561 nm c. 587 nm b. 480 nm d. 467 nm
In a vacuum the speed of light waves compared to the speed of radio waves is
A. faster B. slower C. the same