A 50.0 mm lens is used to take a picture of an object 1.30 m tall located 4.00 m away. What is the height of the image on the film?
A. 21.0 mm
B. 16.5 mm
C. 12.0 mm
D. 10.5 mm
E. 9.20 mm
B. 16.5 mm
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____________________ is the molecule most responsible for the greenhouse effect on Venus and Earth
Fill in the blank(s) with correct word
How does the interstellar medium obscure our view of most of the galaxy?
A) The small mixture of dust grains in the interstellar medium absorbs visible light. B) Dust reflects most light from distant regions of the galaxy back towards the source. C) Hydrogen gas produces so much visible light that the interstellar medium is opaque, blocking our view of anything beyond it. D) Molecules in the interstellar medium absorb all wavelengths of light. E) all of the above
Two parallel beams of light in air strike the surface of a transparent material and the refracted beam 1 is closer to the normal than beam 2 . Which beam is traveling at higher speed in the material, and which beam has the higher index of refraction in the material?
a. beam 1, beam 1 b. beam 1, beam 2 c. beam 2, beam 2 d. beam 2, beam 1
Two inflated balloons are of identical size and shape, but one is filled with hydrogen, the other helium. Which has the larger buoyant force on it?
a. neither—the buoyant forces must be equal b. the helium balloon c. the hydrogen balloon d. It can't be determined.