A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye
a. 3.5
b. 7.0
c. 9.2
d. 12
e. 2.5
B
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Determine the stability criterion for an explicit solution of three-dimensional transient conduction in a rectangular geometry.
GIVEN - Three-dimensional transient conduction in a rectangular geometry FIND (a) The stability criterion for an explicit situation
The brakes in a car work because of
a. Archimedes' principle. b. Pascal's principle. c. Bernoulli's principle. d. Torricelli's principle. e. none of these principles.
An alpha particle (a helium nucleus, having charge +2e and mass 6.64 × 10-27 kg) moves head-on at a fixed gold nucleus (having charge +79e)
If the distance of closest approach is 2.0 × 10-10 m, what was the speed of the alpha particle when it was very far away from the gold? (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.60 × 10-19 C) A) 2.3 × 105 m/s B) 4.6 × 105 m/s C) 2.3 × 106 m/s D) 4.6 × 106 m/s
For a converging lens with two convex surfaces, the radius of curvature for both surfaces is 20 cm. If the focal length is 10 cm, what must the index of refraction be?
a. 1.5 c. 2.0 b. 2.5 d. 3.0