A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light bulb in 1.0 min?
a. 17 C
b. 15 C
c. 14 C
d. 13 C
e. 60 C
B
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Each white dot in this figure represents the location of a small body in our solar system. The donut-shaped ring of white dots just beyond Neptune's orbit represents the part of our solar system that we call
A) the asteroid belt. B) the Kuiper belt. C) the Oort cloud. D) the solar nebula.
Light shines through atomic hydrogen gas. It is seen that the gas absorbs light readily at a wavelength of 91.63 nm
What is the value of n of the level to which the hydrogen is being excited by the absorption of light of this wavelength? Assume that the most of the atoms in the gas are in the lowest level. (h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, the Rydberg constant is R = 1.097 × 107 m-1) A) 14 B) 16 C) 11 D) 21
Equilibrium: A store's sign has a mass of 20 kg and is 3.0 m long. It is uniform, so its center of gravity is at the center of the sign. It is supported horizontally by a small loose bolt attached to the wall at one end and by a wire at the other end, as shown in the figure. What is the magnitude of the net force that the bolt exerts on the sign?
A. 460 N B. 230 N C. 200 N D. 120 N E. 300 N
What is the primary cause of Earth's seasons?
What will be an ideal response?