The rise in ocean levels is due to
A) warmer water.
B) melting of ice on land that flows into the ocean.
C) both of these
D) none of the above
Answer: C
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The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 s-1)t]. What is the speed of the wave?
A) 0.450 m/s B) 1.41 m/s C) 2.22 m/s D) 3.16 m/s E) 23.5 m/s
A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s. At this time, the driver suddenly realizes that she must stop the car
If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign? A) 2.89 m/s2 B) 3.89 m/s2 C) 4.17 m/s2 D) 3.42 m/s2 E) 2.08 m/s2
The "average speed" of a trip by car describes:
a. the speed on the odometer at a given moment. b. a speed that remains the same throughout the whole trip. c. the distance traveled divided by how long it took. d. how long the trip usually takes. e. the speed at which most people drive for the trip.
A proton (+1.6 × 10^?19 C) moves 15.0 cm along the direction of an electric field of strength 3.0 N/C. The electrical potential difference between the proton's initial and ending points is:
a. 4.5 × 10^?19 V. b. 0.45 V. c. 24 V. d. 0.55 V. e. zero