The apparent visual magnitude of a star is a measure of the star's
a. size.
b. intensity.
c. distance.
d. color.
e. temperature.
b
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Terrestrial worlds are all differentiated, which means they are separated into layers of different _______________
Fill in the blank(s) with correct word
Chris and Jamie are carrying Wayne on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 100 N. Wayne weighs 800 N. Wayne's center of gravity is 75.0 cm from Chris. Chris and Jamie are at the ends of the stretcher. The force that Chris is exerting to support the stretcher, with Wayne on it, is
A. 250 N. B. 350 N. C. 400 N. D. 550 N. E. 650 N.
When a certain simple pendulum is set swinging, its angular displacement ? as a function of time t obeys the equation ? = 8.5° cos(2.4 s-1t). How long is the pendulum?
What will be an ideal response?
If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gravity at the surface would become
A) 4 times what it now is. B) 1/4 of what it now is. C) 2 times what it now is. D) the same as it now is. E) 1/2 of what it now is.