A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.If two slide projectors are connected in series across the same 120-volt source, the current drawn from the source remains at 6 amperes
a. True
b. False
Indicate whether the statement is true or false
False
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A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a maximum?
A) at either A or B B) midway between A and B C) one-fourth of the way between A and B
Because of their low surface gravities, the Moon and Mercury lack ________
Fill in the blank(s) with correct word
An electron is confined in a harmonic oscillator potential well. What is the longest wavelength of light that the electron can absorb
if the net force on the electron behaves as though it has a spring constant of 74 N/m? (mel = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 200 nm B) 230 nm C) 220 nm D) 210 nm
Which is heated in its interior by nuclear processes?
A) Sun B) Earth C) both of these D) neither of these