A metal sphere of radius 2.0 cm carries an excess charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 6.4 × 106 N/C
B) 5.7 × 106 N/C
C) 4.2 × 106 N/C
D) 7.5 × 106 N/C
E) 9.3 × 106 N/C
D
You might also like to view...
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C The 1 kg block of ice melts into water. The amount of heat absorbed by the ice as it melts is
a. 2,000 J b. 4,000 J c. 20,000 J d. 40,000 J e. 334,000 J
A 100 kg football linebacker moving at 2 m/s tackles head-on an 80 kg halfback running 3 m/s. Neglecting the effects due to digging in of cleats
A) this is a simple example of an elastic collision. B) the linebacker will drive the halfback backward. C) neither player will drive the other backward. D) the halfback will drive the linebacker backward.
As Kepler's first attempt to invent a theory that agreed with Tycho's data, he tried to "fit" the data for Mars to an orbit that was
A) an ellipse with the sun at one focus. B) a loop-the-loop, i.e., a circle within a circle. C) a circle with the sun at the center. D) an ellipse with Earth at one focus. E) a circle with Earth at the center.
What is the correct method to subtract a vector from another vector?
a. Put one on top of the other, put a minus sign by the lower one, and then subtract as if they were numbers. b. Draw an arrow from the head of the first vector to the tail of the second. c. Add the two vectors and make the result negative. d. Turn the arrow you are subtracting around, and then add. e. Draw an arrow from the tail of the first vector to the head of the second.