One force acting on a falling apple is the apple's weight. Which of the following is the best description of the other member of the "force pair" [of which the apple's weight is one member]?
A) Gravity pulling downward on the apple.
B) The force of gravity by Earth pulling upward on the apple.
C) The force of gravity by the apple pulling upward on Earth.
D) The force of gravity by the apple pushing downward on Earth.
E) Air resistance acting upward on the apple.
C
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Determine the energy stored in C2 when C1 = 15 ?F, C2 = 10 ?F, C3 = 20 ?F, and V0 = 18 V
a.
0.72 mJ
b.
0.32 mJ
c.
0.50 mJ
d.
0.18 mJ
e.
1.60 mJ
Sunspots are known to be magnetic phenomena because
a. Doppler shifts in spectral lines are observed. b. the Zeeman effect is observed in sunspots. c. collisional broadening is observed in spectral lines. d. infrared observations indicate that the sunspots are cooler than their surroundings. e. observations during eclipses reveal a very extensive photosphere.
Wiley Coyote has missed the elusive roadrunner once again. This time, he leaves the edge of the cliff at 50.0 m/s horizontal velocity. If the canyon is 100 m deep, how far from the edge of the cliff does the coyote land?
What will be an ideal response?
A particle (mass = 6.7 × 10^-27 kg, charge = 3.2 × 10^-19 C) moves along the positive x axis with a speed of 4.8 × 10^5 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
a. 2.0 kN/C b. 1.5 kN/C c. 1.2 kN/C d. 3.5 kN/C e. 2.4 kN/C