Decreasing the voltage across the two plates of a capacitor will produce what effect on the capacitor?
a. decrease charge
c. decrease capacitance
b. increase capacitance
d. increase charge
A
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A 600-kg car is going around a banked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate banking angle so that the car stays on its path without the assistance of friction?
A) 29.1° B) 13.5° C) 33.8° D) 56.2° E) 60.9°
The center of mass and the center of gravity coincide
A) only if the object is symmetrical. B) only if the object is symmetrical and it is in a uniform gravitational field. C) if the object is in a uniform gravitational field. D) at all times.
In the Doppler effect, a redshift of spectral lines shows us the source is receding from us
Indicate whether the statement is true or false
A clerk can lift containers a vertical distance of 1 m, or roll them up a 2-m-long ramp to the same elevation. With the ramp, the applied force needed is
A) half as much. B) twice as much. C) the same.