This photo was taken from orbit around some planet. What planet is it, and how do you know?
A) Mars because we see dried up riverbeds
B) the Moon because it has craters
C) Venus because of its yellowish color
D) Mercury because we see gigantic cliffs
A) Mars because we see dried up riverbeds
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A body on the surface of the Earth weighs 400 lb. The radius of the Earth is about 4,000 miles. If this same body were placed on a 4,000-mile-high tower, its weight would be
a. 100 lbs. b. 200 lbs. c. 400 lbs. d. 800 lbs. e. 16,000 lbs.
A pipe of length 10.0 m increases in length by 1.5 cm when its temperature is increased by 72°F. What is its coefficient of linear expansion?
a. 38 × 10^?6/°C b. 75 × 10^?6/°C c. 68 × 10^?6/°C d. 28 × 10^?6/°C e. 47 × 10^?6/°C
The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T
What is the intensity of the wave? (c = 3.0 x 108 m/s, c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 1.0 × 10-13 W/m2 B) 1.5 × 10-5 W/m2 C) 3.0 × 10-5 W/m2 D) 2.0 × 10-13 W/m2 E) 7.5 × 105 W/m2
Exhibit 4-2
Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.
Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the acceleration,
, at point B, is shown by the arrow ina.
Physics & Space Science