3 years ago

Which of the following solid fuels has the highest heating value?

Physics

1 answer:

Makovka662 [10]3 years ago

4 0

I wanna say its A . I could be wrong but im almost 100 percent sure that its A wood

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The answer is B) Double slit

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Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. (a) How fa

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Answer:

150000000000 m

0.0000005 seconds

33.33 ns

Explanation:

Speed of electromagnetic waves through vacuum = $3\times 10^8\ m/s$

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Echo time is the time taken to reach the object and come back to the observer

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$Distance=3\times 10^8\times \frac{1000}{2}=150000000000\ m$

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Time = Distance / Speed

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$Echo\ time=2\times 0.00000025=0.0000005\ seconds$

The echo time will be 0.0000005 seconds

Difference in time = Difference in distance / Speed

$\Delta t=\frac{\Delta d}{v}\\\Rightarrow \Delta t=\frac{10}{3\times 10^8}\\\Rightarrow \Delta=33.33\ ns$

The accuracy by which I will be able to measure the echo time is 33.33 ns

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What type of electromagnetic wave does a light bulb and a radio antenna release?

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