When you drop a rubber ball on the floor it bounces back. The force exerted on the ball to produce bouncing is by the
A) ball.
B) floor.
C) need more information
Answer: B
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Discuss the solution to the flatness problem and horizon problem of the Universe
What will be an ideal response?
At what two celestial locations do the celestial equator and ecliptic coincide?
a. winter solstice and summer solstice b. vernal equinox and autumnal equinox c. they coincide at all points because they are the same. d. north celestial pole and south celestial pole e. zenith and east point
A hologram like the one shown here cannot be fully appreciated from pictures shown in a book. Why is this?
a. The colors are brighter in a hologram. b. Textbook printing methods cannot reproduce any picture generated by laser light. c. A hologram appears as a three-dimensional image to the viewer, but not by viewing the flat page of a book. d. Information from each point in the scene is recorded in all points of the hologram.
The San Andreas Fault was created
A) during the Cenozoic. B) by the collision of the eastward moving North American Plate and the Pacific ridge. C) by the same tectonic activity that formed the Gulf of California. D) by Cenozoic tectonic activity that also formed the Gulf of California as the North American Plate collided with the Pacific ridge.