To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the height of the bridge is 41 m, how long will it take for the stone to hit the water?
A) 2.3 s
B) 2.6 s
C) 2.9 s
D) 3.2 s
E) 3.6 s
C
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Magnifying Glass With the Image at the Near Point of the Eye: A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. What is the maximum angular magnification of the lens under these circumstances?
A. 3.5 B. 4.5 C. 6.5 D. 7.5 E. 8.5
A "parallel ray" is a ray parallel to the
A) mirror radius B) object axis C) chief ray D) optic axis
When a fat is treated with NaOH, the ester bonds break to form glycerol and the sodium salts of fatty acids, which are known as ______________
Fill in the blank(s) with correct word
Voltage is a measure of the energy per unit charge supplied by a battery
a. True b. False Indicate whether the statement is true or false