The plates on a vacuum capacitor have a radius of 2.5 mm and are separated by a distance of 0.75 mm.

What is the capacitance of this capacitor?

a. 2.3 x 10^-13 F
b. 9.3 x 10^-11 F
c. 3.0 x 10^-11 F
d. 2.3 x 10^-10 F

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

the answer is d. 4

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when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

c) up is the direction the magnetic force is acting on the charge.