A right triangle has sides 5.0 m, 12 m, and 13 m. The largest angle not 90° of this triangle is nearest:
a. 21°.
b. 23°.
c. 67°.
d. Not attainable since this is not a right triangle.
C
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The Earth never passed through the cratering stage in planetary development
Indicate whether the statement is true or false
A critical difference between millisecond and normal pulsars is that:
A) the millisecond ones are not associated with the galaxy, but scattered everywhere. B) the millisecond ones are speeding up, but normal pulsars slow down over time. C) the millisecond ones must eventually collapse into black holes. D) the millisecond ones all have planets, while normal ones do not. E) millisecond ones are only found in globular clusters, while normal ones are not.
If you cover half a camera lens with opaque tape, the images produced will be
A) cut in half. B) only dimmer. C) both of these D) neither of these
When 1.0 kg of steam at 100°C condenses to water at 100°C, what is the change in entropy of the steam? The latent heat of vaporization of water is 22.6 × 105 J/kg
A) zero B) 6.1 × 103 J/K C) -6.1 × 103 J/K D) 22.6 × 105 J/K E) -22.6 × 105 J/K