A telescope is constructed with two lenses separated by a distance of 25 cm. The focal length of the objective is 20 cm. The focal length of the eyepiece is 5 cm. Calculate the magnitude of the angular magnification of the telescope
a. 6
b. 4
c. 8
d. 10
e. 5
b
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According to current evidence, Pluto is best explained as ______.
Fill in the blank(s) with the appropriate word(s).
The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is 6.4 × 10^6 m. If all the sunlight that hits the Earth were absorbed, what would be the magnitude of the resulting force on the Earth?
a. 0.0087 N b. 1.8 × 10^8 N c. 5.6 × 10^8 N d. 87 N
A wave is described by the function y(x,t) = (3.00 cm)cos[( 3.00 m-1)x + ( 4.00 s-1)t]. What is the wavelength of this wave?
A) 2.09 m B) 3.00 m C) 0.333 m D) 0.250 m E) 1.57 m
RC Circuits: A 1.0-?F capacitor is charged until it acquires a potential difference of 900.0 V across its plates, and then the emf source is removed. If the capacitor is then discharged through a 500.0-k? resistance, what is the voltage drop across the capacitor 9.0 ms after beginning the discharge?
A. 880 V B. 920 V C. 16 V D. -16 V