Which planet may have helium rain in its interior, and what does this rain do?
A) Uranus, where it makes the ground wet.
B) Neptune, where it is restructuring the planet's interior.
C) Jupiter, where it may be an energy source for the Great Red Spot.
D) Saturn, where it generates heat as it falls downward.
D
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Chromatic aberration occurs because of
A) polarization. B) spherical surfaces. C) dispersion. D) internal reflection. E) astigmatism.
Are small ripples sent out across the surface of a lake truly "waves", as that word is used in physics?
A) Yes, because the water itself doesn't go anyplace but simply oscillates up and down. B) No, because true water waves are longitudinal. C) Yes, because the water itself moves across the lake, away from the source of the wave. D) No, because the water's motion is "mass motion", similar to the motion of a ball that has been thrown. E) No, because the water itself doesn't go anyplace but simply oscillates up and down in one place.
Impulse: A block of mass m = 5.6 kg, moving on a frictionless surface with a velocity of vi = 6.5 m/s to the right, collides with a block of mass M at rest, as shown in the figure. After the collision, the 5.6-kg block recoils with a velocity of vf = 0.70 m/s to the left. If the blocks are in contact for 0.20 s, what is the magnitude of the average force on the 5.6-kg block, while the two blocks are in contact?
A. 202 N B. 192 N C. 182 N D. 34 N E. 162 N
The root-mean-square speed (thermal speed) of the molecules of a gas is 200 m/s at a temperature 23.0°C. What is the mass of the individual molecules? The Boltzmann constant is 1.38 × 10-23 J/K
A) 2.13 × 10-25 kg B) 2.45 × 10-25 kg C) 5.66 × 10-25 kg D) 1.78 × 10-25 kg E) 3.11 × 10-25 kg