The most recent ice age ended
A) about 1000 years ago.
B) about 10,000 years ago.
C) about 100,000 years ago.
D) about one million years ago.
E) hundreds of millions of years ago.
B
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A race car goes around a curve at 50 m/s. The radius of the curve is 400 m. What is the car's acceleration?
Which of the following statements is(are) correct when an ideal gas goes from an initial to a final state in a single process?
a. No work is done on or by the gas when the volume remains constant. b. No energy is transferred into or out of the gas as heat transfer when the temperature remains constant. c. The internal energy of the gas does not change when the pressure remains constant. d. All the statements above are correct. e. Only statements (a) and (b) above are correct.
Several charges in the neighborhood of point P produce an electric potential of 6.0 kV (relative to zero at infinity) and an electric field of 36 N/C at point P. Determine the work required of an external agent to move a 3.0-?C charge along the x axis from infinity to point P without any net change in the kinetic energy of the particle
a. 21 mJ b. 18 mJ c. 24 mJ d. 27 mJ e. 12 mJ
An object that is 4.00 cm tall is placed 18.0 cm in front of a concave mirror having a focal length of 20.0 cm. What is the location of its image in relation to the mirror and what are its characteristics?
A) 20 cm on the same side of mirror, real, 10.0 times bigger B) 180 cm on the other side of mirror, real, 6.00 times bigger C) 18 cm on the same side of mirror, virtual, 2.25 times bigger D) 10 cm on the other side of mirror, virtual, 10.0 times bigger E) 180 cm on the other side of mirror, virtual, 10.0 times bigger