What is the resistance of a wire made of a material with a resistivity of 3.2 × 10^?8 ? / m if its length is 2.5 m and its diameter is 0.50 mm?
a. 0.16 ?
b. 0.10 ?
c. 1.28 ?
d. 0.41 ?
e. 0.81 ?
d
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A light ray strikes a glass plate of thickness 0.80 cm at an angle of incidence of 60°. The index of refraction of the glass is 1.55. By how much is the beam displaced from its original line of travel after it has passed through the glass?
What will be an ideal response?
The Kepler mission has searched for Earth-like planets by looking for the dip in the brightness of a star as a (potential) planet transits across it
Why will this technique actually miss the vast majority of planets around the stars it observes?
Asteroid 433 Eros is one of the largest near-Earth asteroids. For purposes of this problem, assume it is spherical. The value of g at its surface is 0.0060 m/s2 and the escape velocity is only 10.1 m/s. What is the mass of Eros? G = 6
67 x 10-11 N•m2/kg2. A) 2.3 × 1016 kg B) 3.5 × 1012 kg C) 6.5 × 1015 kg D) 4.9 × 1014 kg E) 6.7 × 1013 kg
If an observer walks north toward increasing latitude, the number of circumpolar stars would
a. remain constant. b. decrease. c. increase. d. Unknown unless you also state the longitude of the observer.