Space-time will be flat if
a. the Universe is expanding.
b. the Universe is accelerating.
c. the average density of the Universe is equal to the critical density.
d. the Universe is finite.
e. the Universe is homogeneous and isotropic.
c
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A figure skater spins at the end of her routine, and slows down with an angular acceleration of 1.2 radians per second squared. If she initially spun with a period of 0.2 seconds, how many turns does she go through while slowing to a stop?
A. 65 B. 6 C. 33 D. 15
A parallelogram is a four-sided figure with opposite sides that are
A) equal. B) parallel. C) at right angles. D) none of the above
There is less ammonia in the atmospheres of Uranus and Neptune than in Jupiter or Saturn
Indicate whether the statement is true or false
A person having a near point of 25 cm and a far point at infinity uses a converging lens of focal length 5.0 cm as a magnifying glass. What is the magnification if the person's eye is relaxed (with the image at his far point)?
What will be an ideal response?