For a wave with a constant speed, the smaller the period, the ______________ its wavelength
Fill in the blank(s) with correct word
greater
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Power: An ac signal is applied across a 40-mH inductor and a 100-? resistor. If the power factor of this circuit is 0.40, what is the frequency of the ac signal?
A. 160 Hz B. 200 Hz C. 410 Hz D. 600 Hz E. 910 Hz
Which of the following is the most similar, in its operation, to a photovoltaic cell?
A) fluorescent light bulb B) geothermal energy C) fossil-fuel electric power plant D) battery E) automobile engine
The post-Newtonian revolution began in 1900 when
A) Max Planck introduced the quantum of energy. B) Einstein introduced the general theory of relativity. C) Einstein introduced the special theory of relativity. D) Werner Heisenberg had one beer too many and declared that he was uncertain about his own identity. E) Michelson declared that the Newtonian age had ended.
A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface. At an instant when the sled's acceleration has a horizontal component of 6.0 m/s2 and a downward component of 2.8 m/s2, what is the magnitude of the force on the rider by the sled?
a. 0.83 kN b. 0.98 kN c. 0.65 kN d. 0.68 kN e. 0.72 kN