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ryzh [129]
3 years ago
11

A circuit has a resistance of 2.5 Ω and is powered by a 12.0 V battery.

Physics
1 answer:
Nadya [2.5K]3 years ago
8 0

<u>Answer </u>

4.8 A

<u>Explanation </u>

From the ohm's law,  

V = IR

where V is voltage, I is current and R is resistance.

I = V/R

  = 12.0/2.5

  = 4.8 A

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A penny is dropped off the top of the Stratosphere from rest and falls freely with the
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Answer:

S = 122.5m

Explanation:

Given the following data;

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Since it's a free fall, initial velocity, u = 0

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S = ut + \frac {1}{2}at^{2}

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2 years ago
An emission ray has a frequency of 5.10 × 10¹Ê Hz. Given that the speed of light is 2.998 × 10§ m/s, what is the wavelength of t
scoundrel [369]
The answer is 5.88 · 10⁻⁷<span> m.</span>

To calculate this we will use the light equation:

v = λ · f,
where:
v - the speed of light (units: m/s)
<span>λ - the wavelength of the ray (units: m)
</span>f - the frequency of the ray (units: Hz = 1/s <span>since Hz means cycles per second (f=1/T))
</span>
It is given:
f = 5.10 · 10¹⁴ Hz = 5.10 · 10¹⁴<span> 1/s
v = 2.998 </span>· 10⁸<span> m/s
</span><span>λ = ?
</span>
If v = λ · f, then λ = v ÷ f:
λ = 2.998 · 10⁸ m/s ÷ 5.10 · 10¹⁴ 1/s
   = 0.588 · 10⁸⁻¹⁴ · m
   = 0.588 · 10⁻⁶ m
   = 5.88 · 10⁻⁷ m
6 0
3 years ago
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