When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________
Fill in the blank(s) with correct word
stays the same
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A star is observed with a surface temperature of 3,000 K and a lumi nosity of 105 solar. What is the approximate radius of this star?
A) 10 solar radii B) 103 solar radii C) 102 solar radii D) The radius cannot be determined.
The mass of a cubic meter of water is
A) 1 kg. B) 10 kg. C) 100 kg. D) 1000 kg. E) 9800 N.
A uniform beam having a mass of 60 kg and a length of 2.8 m is held in place at its lower end by a pin. Its upper end leans against a vertical frictionless wall as shown in the figure. What is the magnitude of the force the pin exerts on the beam?
A. 0.68 kN B. 0.57 kN C. 0.74 kN D. 0.63 kN E. 0.35 kN
A series LRC ac circuit has a peak voltage of 111 V and a peak current of 2.00 A. If the current lags the voltage by 35.0?, what is the average power of the circuit?
A) 91 W B) 182 W C) 78 W D) 156 W