2. A circuit consists of a 10.0-ohm resistor,
a 15.0-ohm resistor, and a 20.0-ohm
resistor connected in parallel across a
9.00-volt battery. What is the equivalent
resistance of this circuit?
(1) 0.200 12 (3) 4.62 1
(2) 1.95.22
(4) 45.012

(3) 4.62 ohms

Explanation:

Te equivalent resistance R is gotten from

1/R = 1/R₁ + 1/R₂ + 1/R₃ where R₁ = 10.0 ohm, R₂ = 15.0 ohm and R₃ = 20.0 ohm

1/R = 1/10 + 1/15 + 1/20

1/R = 0.1 + 0.0667 + 0.05

1/R = 0.2167

R = 1/0.2167

R = 4.62 ohms

d) the number of neutrons plus the number of protons

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.