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

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science