A 4.0-pC point charge is placed at the center of a hollow (inner radius = 2.0 cm, outer radius = 4.0 cm) conducting sphere which has a net charge of 4.0 pC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge

a. 35 N/C
b. 25 N/C
c. 30 N/C
d. 20 N/C
e. 10 N/C


d

Physics & Space Science

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Magnesium alloys have low ductility because of their _________close-packed crystal structure.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

How much energy is necessary to place three +2.0-µC point charges at the vertices of an equilateral triangle of side 2.0 cm if they started out extremely far away? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)

A) 4.5 J B) 5.4 J C) 6.7 J D) 7.6 J

Physics & Space Science

When light shines on a lens placed on a flat piece of glass, interference occurs which causes circular fringes called Newton's rings. The two beams that are interfering come:

a. from the top and bottom surface of the lens. b. from the top surface of the lens and the top surface of the piece of glass. c. from the bottom surface of the lens and the top surface of the piece of glass. d. from the top and bottom surface of the flat piece of glass.

Physics & Space Science

The objective lens of a telescope has a focal length of 2.0 m and its eyepiece has a focal length of 1.0 cm. What is the magnification of this telescope when viewing Jupiter?

A) 0.0050 B) 0.50 C) 2.0 D) 20 E) 200

Physics & Space Science