White dwarfs have such a low luminosity that even the nearest white dwarfs are not visible to the naked eye
Indicate whether the statement is true or false
T
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Gravity obeys the inverse square law, which implies that the gravitational force of one body on another will be ____ times stronger at two meters than at six meters apart
a. 2 b. 3 c. 4 d. 9 e. 10
A fast-moving missile soaring overhead possesses
A) speed. B) force. C) both of these D) neither of these
A small glass bead has been charged to 1.9 nC. What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) 4.3 × 104 N/C B) 8.5 × 102 N/C C) 8.1 × 10-5 N/C D) 8.5 × 10-7 N/C
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