An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. How far past the 25 cm lens does the final image form?
a. 20 cm
b. 40 cm
c. 16 cm
d. 25 cm
e. 47 cm
c
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Mass on a Spring: How much mass should be attached to a vertical ideal spring having a spring constant (force constant) of 39.5 N/m so that it will oscillate at 1.00 Hz?
A. 39.5 kg B. 2.00 kg C. 1.00 kg D. 1.56 kg E. 6.29 kg
From Earth, one satellite appears to overtake another. The faster satellite is
A) higher. B) lower. C) smaller. D) can't say
Captain Ahab notices that the waves passing the anchored Pequod are 10 feet from crest to crest, and that each minute 4 crests pass. The wave speed is
A. 20 feet per minute. B. 80 feet per minute. C. 40 feet per minute. D. 5 feet per minute.
Layered sedimentary rocks and foliated metamorphic rocks share similarities because
A) most foliated metamorphic rocks are derived from layered sedimentary rocks. B) they both are formed layer upon layer. C) the minerals in these two types of rocks form in parallel planes. D) both rock types are subjected to compressive forces.