A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the angular magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?
A) 5.0
B) 3.0
C) 4.0
D) 1.0
E) 2.0
A
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A copper wire (d 5 1.5 mm) is bent around a tube of radius R 5 0.6 m. The maximum normal strain in the wire is approximately:
(A) 1.25 3 1023
(B) 1.55 3 1023
(C) 1.76 3 1023
(D) 1.92 3 1023
The identities of dark energy and dark matter are
A) unknown at this time. B) subjects of intense astronomical interest. C) both of these D) neither of these
Earth and Venus are often called sister planets; in which ways are they most alike?
A) atmospheric composition and density B) size, density, and surface gravity C) surface temperature and pressure D) cloud composition and meteorology E) polar caps and rusty red deserts
A 1000 kg car experiences a net force of 9500 N while decelerating from 30.0 m/s to 23.4 m/s. How far does it travel while slowing down?
A) 21.9 m B) 20.2 m C) 18.5 m D) 17.4 m