3 years ago

What is the critical angle - easy definition

1 answer:

8 0

<span>the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.</span>

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What is the equivalent resistance of the circuit?

Zigmanuir [339]

Answer:

5.5Ω

Explanation:

The circuit diagram shown is a parallel arrangement. To solve this problem for the equivalent resistance,

R1 = 10Ω

R2 = 20Ω

R3 = 30Ω

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$\frac{1}{Rt}$ = $\frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3}$

Now insert the parameters and solve;

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3 years ago

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3 years ago

Calculate the power of a train that uses 2MJ of chemical energy in 4<br> seconds.

nadya68 [22]

Answer:

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Explanation:

Given that,

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We need to find the power of the train. We know that,

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So,

$P=\dfrac{2\times 10^6}{4}\\\\P=500000\ W\\\\or\\\\P=500\ kW$

So, the power of the train is equal to 500 kW.

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3 years ago