A light bulb has resistance of 175 ? when operating at 100 V. Find the current in the light bulb
a. 1.8 A
b. 0.33 A
c. 0.57 A
d. 0.76 A
e. 1.3 A
c
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A rectangle has a length of 1.323 m and a width of 4.16 m. Using significant figure rules, what is the area of this rectangle?
A. 5.50368 m2 B. 5.5037 m2 C. 5.504 m2 D. 5.50 m2 E. 5.5 m2
If y = 0.02 sin (30x ? 400t) (SI units), the velocity of the wave is
a. 3/40 m/s. b. 40/3 m/s. c. 60?/400 m/s. d. 400/60? m/s. e. 400 m/s.
Which of the following statements best describes Kepler's 3rd law of planetary motion?
a. The smaller the diameter of a planet, the faster its rotational period is. b. The orbital period of a planet is directly proportional to the diameter of the planet. c. The smaller the orbit, the longer its orbital period is. d. The larger the orbit, the longer its orbital period is.
Spherical Mirrors: A concave spherical mirror has a focal length of magnitude 20 cm. An object is placed 30 cm in front of the mirror on the mirror's axis. Where is the image located?
A. 12 cm behind the mirror B. 12 cm in front of the mirror C. 60 cm behind the mirror D. 60 cm in front of the mirror