Photography Optics: A 35-mm single lens reflex (SLR) digital camera is using a lens of focal length 35.0 mm to photograph a person who is 1.80 m tall and located 3.60 m from the lens.(a) How far is the CCD sensor from the lens when the person is in focus?(b) How tall is the person's image on the CCD sensor?
What will be an ideal response?
(a) 3.53 cm (b) 1.77 cm
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Inflation explains the horizon and flatness problems
a. True b. False Indicate whether the statement is true or false
Glaciers are thinning in high mountain regions, but there is no evidence of thinning on the Antarctic, Arctic, and Greenland Ice Sheets
What will be an ideal response?
A string is stretched with a tension of 120 N. The string has a length of 2.5 meters. The velocity of wave propagation along the string is 220 m/s. The mass per unit length of the string is
a. 
b. 
c. 
d. 
e. 
A boy on a bicycle rides in a circle of radius 
at speed 
If the boy rides at a radius equal to half the radius 
by what factor must he change his speed in order to have the same centripetal acceleration?
A. 0.25 B. 2 C. 0.71 D. 4 E. 1.4 F. 0.5