A resistor and an inductor are connected in series to a battery. The time constant for the circuit represents the time required for the current to reach
A) 25% of the maximum current.
B) 37% of the maximum current.
C) 100% of the maximum current.
D) 75% of the maximum current.
E) 63% of the maximum current.
E
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An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed?
A) 0.25 s B) 4.0 s C) 0.0577 s D) 17.3 s E) 8.0 s
What is the distance from the center of the Moon to the point between Earth and the Moon where the gravitational pulls of Earth and Moon are equal?
The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the center-to-center distance between Earth and the Moon is 3.84 × 108 m, and G = 6.67 × 10-11 N ? m2/kg2. A) 3.45 × 108 m B) 3.84 × 107 m C) 4.69 × 106 m D) 4.69 × 107 m E) 3.83 × 106 m
A light ray in water passes into air. The angle of incidence in the water is 40°. What is the angle of refraction in air if the index of refraction of water is 1.33?
A) 59° B) 0.59° C) 40° D) 1.33° E) 29°
The size of a star's image in a photo tells you how _______________ the star appears
Fill in the blank(s) with correct word