Spherical Mirrors: A cell phone that is 8.90 cm tall is placed in front of a convex mirror. The image of the phone is 7.80 cm tall and is located 14.8 cm from a mirror. What is the mirror's focal length?
A. -120 cm
B. -105 cm
C. +16.9 cm
D. -13.0 cm
E. +120 cm
Answer: A
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A potential changes at the greatest rate in the direction of the gradient of the potential
Indicate whether the statement is true or false
A hospital patient has been given a sample of 131I , which has a half-life of 8.04 days. This sample is decaying at 5.9 times the acceptable level for exposure to the general public
How long must the patient wait for the decay rate of the sample to reach the acceptable level? A) 21 days B) 14 days C) 9.9 days D) 8.9 days
On planet Q the standard unit of volume is called the guppy. Space travelers from Earth have determined that one liter = 38.2 guppies. How many guppies are in 200 liters?
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