A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?
A) 18 W
B) 22 W
C) 24 W
D) 27 W
A
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A spherical mirror
A. is shaped like a complete sphere. B. is a section of a sphere. C. creates only spherical images. D. only reflects spherical rays.
Compared with an alcohol barometer, the column height for a mercury barometer would be
A) lower. B) higher. C) the same.
A resistor, inductor, and capacitor are connected in series, each with effective (rms) voltage of 64.0 V, 87.6 V, and 69.0 V, respectively. What is the value of the effective (rms) voltage of the applied source in the circuit?
a. 82.6 V b. 66.6 V c. 83.7 V d. 220.6 V e. 129 V
When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°. What is the wavelength of the light?
A) 336 nm B) 752 nm C) 633 nm D) 452 nm E) 363 nm