Physics, 28.09.2019 04:30 jbearallen9557

How much power is the 20ω resistor dissipating?
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the 10ω resistor in the figure (figure 1) is dissipating 35 w of power.
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refer to picture

How much power is the 20ω resistor dissipating? -- the 10ω resistor in the figure (figu

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Answer from: LilFreaky666

The power dissipated by a resistor is given by:
P=I^2 R

(1)
where I is the current through the resistor and R is the resistance.

We are told that the resistor of $10 \Omega$ dissipates 35 W of power. By rearranging the previous equation (1), and by using these data, we can find the current flowing through the resistor of $10 \Omega$ :
$I_L = \sqrt{\frac{P}{R} }= \sqrt{ \frac{35 W}{10 \Omega} } =1.87 A$

This is the current flowing in the left branch of the circuit: we need to find the current flowing in the right branch, I_R

.
The equivalent resistance on the left branch is the sum of the two resistances, since they are in series:
$R_{L}=10 \Omega + 5 \Omega = 15 \Omega$
We know that this resistance is in parallel with the resistor on the right, $R_R = 20 \Omega$ , so they have same potential difference:
V_L=V_R

which can be rewritten, by using Ohm's law:
I_L R_L = I_R R_R

Rearranging the equation, we find the current through the right branch:
$I_R= \frac{I_L R_L}{R_R}= \frac{(1.87 A)(15 \Omega)}{20 \Omega}=1.40 A$

And now we can find the power dissipated through the resistor on the right:
$P=I^2R=(1.40 A)^2(20 \Omega)=39.2 W$

Answer from: shira35

The power dissipated through the resistor on the right is $39.2\;\text{W}$

Explanation:

Given information:

The resistance 20Ω , 10Ω and 5Ω

The power dissipated by a resistor is given by

P=I^2R

According to the question the resistor of 10Ω dissipates 35 W of power.

So,

$I_L=\sqrt{ \frac{P}{R} }\\I_L=\sqrt{35/10} \\I_L=1.87\;A$

This is the current flowing in the left branch of the circuit.

Similarly for the right branch:

R_L=15 Ω

R_R=20 Ω

Now, according to the ohm's law:

I_LR_L=I_RR_R

on putting the values in above equation:

$I_R=(1.87\times 15)/20\\I_R=1.40\;A$

Hence, the power dissipated through the resistor on the right

$P=I^2R\\P=1.40^2\times20\\P=39.2\;W$

The power dissipated through the resistor on the right is $39.2\;\text{W}$

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Answer from: Quest

elly's long hair:

a. if the salon only takes cash, then this isn't the problem. it doesn't matter how much she has in her checking account. she can't get a haircut until she has the cash.

b. if she has overdraft protection, then there's no problem. she can go ahead and write a check that her account can't cover, then sometime later, pay the bank some outrageous usury for loaning her a few bucks for a few days, but with beautiful hair.

c. if elly has some principles, and doesn't want to write a bad check, then now she has a problem. her desire for the new hairstyle is in conflict with her honesty and integrity.

d. if the bank will not process a check she writes, then even if she had a million $$ in her account, she couldn't use any of it. the amount she has in her account is not the problem. and if i may suggest, she might as well close her checking account, and put the money where it'll work for her. it's not doing her a bit of good in a checking account, since she can't write any checks.

justin can't pay the full balance:

a. he can't even handle the credit limit he has now. under no circumstances should he ask for a higher limit.

b. he can ask for the grace period to be extended. but that's no solution, the bank will almost certainly refuse anyway, and there are much better options. he knew the rules of his credit card when he started using it.

c. he definitely should pay the interest on the balance, plus as much of the balance as he can cover at the same time.

d. he definitely should pay the minimum otherwise they could shut down his card. he should also pay as much more as he possibly can. he should also remember the awkward situation he's in, stop buying stuff on credit that he can't afford, and avoid adding any more debt.

i'd say that justin's best best option isn't on this list of choices. what he has to do: pay as much as he can at least the minimum payment plus as much more as he can and then avoid adding more debt.

Answer from: Quest

number of electrons for neutral cl

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How much power is the 20ω resistor dissipating?
--
the 10ω resistor in the figure (figu...

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