How massive are the largest known galaxies?
A) a few million solar masses
B) a hundred million solar masses
C) a few billion solar masses
D) a trillion solar masses
E) hundreds of trillions of solar masses
D
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The deepest point of the Pacific Ocean is 11,033 m, in the Mariana Trench. What is the water pressure at that point? The density of seawater is 1025 kg/m3
A) 1.13 × 107 Pa B) 2.18 × 105 Pa C) 1.11 × 104 Pa D) 1.11 × 108 Pa E) 1.09 × 105 Pa
Snell's Law: An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water on a windless day. A light ray from the air above enters the oil at 45° with the normal and then goes into the water. What is the angle of refraction of this ray in the water? The index of refraction for the oil is 1.15, and for water it is 1.33.
A. 27° B. 32° C. 36° D. 39°
The vast flood deposits prove Mars once had much running water. What happened to it?
What will be an ideal response?
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The kinetic energy of the crate is __________
Fill in the blank(s) with correct word