You stand two feet away from a plane mirror. How far is it from you to your image?
a. 2 ft
b. 3 ft
c. 4 ft
d. 1 ft
e. 8 ft
c
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Consider a converging lens. If the object is inside the focal point, then the image will always be
A) real. B) virtual. C) at the focal point. D) at infinity.
Why can't the carbon dioxide cycle easily correct for the increasing amounts of carbon dioxide introduced into our atmosphere by industrialization?
A) it operates far too slowly to correct for any short-term changes B) pollution has stopped the carbon dioxide cycle from operating C) the carbon dioxide cycle only influences carbon dioxide produced by natural sources D) it operates far too quickly to correct for any short-term changes
The power rating of a resistor is 0.800 W. If the value of the resistor is 400 ?, what is the maximum voltage?
A) 110 V B) 17.9 V C) 170 V D) 1.80 V
An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 1000-m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00