Answer:
C 3.33 Ω
Explanation:
From the equation given 1 / Rtot = 1/10 + 1/5 = 3/10
then Rtot = 10/3 = 3.33 Ω
As an aside:
When there are only two resistors in parallel, the equivalent R is
= R1*R2 / (R1 + R2) = 10*5 / (10+5) = 50 / 15 = 3.33 Ω
Answer:
At 11.5 m
Explanation:
The power per unit area corresponds to the intensity, which is given by

where
P is the power
is the area irradiated at a distance r from the source (it corresponds to the surface area of a sphere of radius r)
Here we want the intensity of the two light bulbs to be the same, so

where we have
P1 = 100 W is the power of the first light bulb
P2 = 75 W is the power of the second light bulb
r2 = 10 m is the distance from the second light bulb
Solving for r1, we find

a. 
The equivalent resistance of a series combination of two resistors is equal to the sum of the individual resistances:

In this circuit, we have

Therefore, the equivalent resistance is

b. 5.8 V, 3.2 V
First of all, we need to determine the current flowing through each resistor, which is given by Ohm's law:

where V = 9.00 V and
. Substituting,

Now we can calculate the potential difference across each resistor by using Ohm's law again:


A mechanical wave can only travel through matter.
<span>A boat would
produce the highest concentration of carbon monoxide in the exhaust system.
</span>Carbon monoxide<span> (CO) is a colorless, odorless, and tasteless gas that is
slightly less dense than air. It is toxic to </span>hemoglobic<span> <span>animals (both </span></span>invertebrate<span> <span>and
vertebrate, including humans) when encountered in concentrations above about 35 </span></span>ppm<span>.</span>