One of the factors that escape velocity depends on is the:
A) mass of the celestial body.
B) rate of spin of the celestial body.
C) magnitude of the surrounding magnetic field.
D) rate of atomic reactions within the celestial body.
A
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If we double the mass of an object without a change in volume, its density would be
A) half. B) double. C) unchanged.
Where the optic nerve penetrates the eye
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
A convex mirror has a focal length of ?20 cm. What is the position of the resulting image (in cm) if the image is upright and four times smaller than the object?
A. ?100 B. ?25 C. ?50 D. ?15 E. ?10
Both black and white road surfaces radiate energy. At midnight on a starry night the warmer road surface is the
A) black surface. B) white surface. C) neither, as no noticeable difference.