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olchik [2.2K]
4 years ago
7

How much voltage must be applied across a 0.20 Ω wire in order to create a 30 A current? (Please show work for it too)

Physics
2 answers:
tester [92]4 years ago
7 0

Answer:

6 V

Explanation:

By ohm's law :

V = IR

V = 0.2 × 30 = 6 V

fredd [130]4 years ago
7 0

Answer:

V=6V

Explanation:

Use the equation I=V/R and solve for V then use V=IR plug in the numbers.

V=IR

V=30(0.2)

V=6V

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Explanation:

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3 years ago
When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This press
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Answer:

1.18454\times 10^{-19}\ Pa

Explanation:

t = Time taken

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v = Final velocity

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r = Radius of barrel = 2.8\times 10^{23}\ m

v^2-u^2=2as\\\Rightarrow a=\dfrac{v^2-u^2}{2s}\\\Rightarrow a=\dfrac{370^2-0^2}{2\times 0.61}\\\Rightarrow a=112213.11475\ m/s^2

Pressure is given by

P=\dfrac{F}{A}\\\Rightarrow P=\dfrac{ma}{\pi r^2}\\\Rightarrow P=\dfrac{2.6\times 10^{23}\times 112213.11475}{\pi (2.8\times 10^{23})^2}\\\Rightarrow P=1.18454\times 10^{-19}\ Pa

The pressure of the expanding gas is 1.18454\times 10^{-19}\ Pa

7 0
3 years ago
10. Most reabsorption occurs in the
Airida [17]
The answer was B!!:)).
3 0
4 years ago
How was Edwin Hubble able to use his discovery of Cepheids in Andromeda to prove that the "spiral nebulae" were actually galaxie
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T = 100 * 9.8 / sin 40 = 1525 N

T cos θ = Th horizontal force due to cable

Th = 1525 cos 40 = 1168 N

8 0
3 years ago
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