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Nady [450]
3 years ago
5

If a 4.0Ω resistor, a 6.0Ω resistor, and an 8.0Ω resistor are connected in parallel across a 12 volt battery, what is the total

current of the circuit?
6.7 amps
18 amps
1.8 amps
3.6 amps
Physics
1 answer:
allsm [11]3 years ago
7 0

Answer:

Explanation:

6.7 amps

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a resistor, of resistance 47 , is damaged when it dissipates a power greater than 0.5W. determine the maximum voltage that can b
harkovskaia [24]

Answer:

<em>The maximum voltage that can be applied without damaging the resistor is 4.85 V</em>

Explanation:

<u>Electric Power in a Resistor</u>

Given a resistor or resistance R connected to a circuit of voltage V carrying a current I. The relation between these three magnitudes is given by Ohm's Law:

V = R.I

The dissipated power P of a resistor can be calculated by the following equation, known as Joule's first law:

P = I^2.R

Solving the first equation for I:

\displaystyle I=\frac{V}{R}

Substituting in the second equation:

\displaystyle P=\frac{V^2}{R^2}.R

Simplifying:

\displaystyle P=\frac{V^2}{R}

Solving for V:

V=\sqrt{P.R}

The resistor has a resistance of R=47Ω and can hold a maximum power of P=0.5 W, thus the maximum voltage is:

V=\sqrt{0.5\cdot 47}

V=\sqrt{23.5}

V = 4.85 V

The maximum voltage that can be applied without damaging the resistor is 4.85 V

6 0
3 years ago
What are some indicators that a chemical reaction is occurring? Check all that apply.
Paul [167]

The formation of bubbles, a change in color, and the formation of a precipitate (1, 3, & 5) are all indicators that a chemical reaction is occurring.

6 0
3 years ago
Read 2 more answers
A car is traveling at 24.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with constant accelerat
Elan Coil [88]

Answer:

The answer to your question is : vf = 15.18 m/s

Explanation:

Data

vo = 24 m/s

d = 120 m

vf = ? when d = 60.0 m

Formula

              vf² = vo²  + 2ad

For d =100m

            a = (vf² - vo²) / 2d

            a = (0 -24²) / 2(100)

            a = -576/200

             a = 2.88 m/s²

Now, when d = 60

        vf² = (24)² - 2(2.88)(60)

        vf² = 576 - 345.6

        vf² = 230.4

        vf = 15.18 m/s

4 0
3 years ago
Read 2 more answers
An object is thrown upward from the top of a 128​-foot building with an initial velocity of 112 feet per second. The height h of
lorasvet [3.4K]

Answer:

Time, t = 8 seconds

Explanation:

An object is thrown upward from the top of a 128​-foot building with an initial velocity of 112 feet per second. The height h as a function of time t is given by :

h=-16t^2+112t+128

We need to find the time when the object will hit the ground. When it will hit the ground, h = 0

So,

-16t^2+112t+128=0

On solving the above quadratic equation, we get the value of t = 8 seconds. So, after 8 seconds the object will hit the ground. Hence, this is the required solution.

6 0
4 years ago
Activity 4:
3241004551 [841]

Answer:

1.so that we won't do any mistakes and won't have injuries.

Explanation:

yes.

because it is a right thing to use correct tools for correct work.

4 0
3 years ago
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