3 years ago

Why is physics used to study stars?

Physics

1 answer:

goblinko [34]3 years ago

3 0

Answer:

stars are made of matter

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bogdanovich [222]

Answer: understandable have a nice day

Explanation:

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3 years ago

Hey Tori's are the rim of a canyon yells hello toward the opposite side she has an echo hello four seconds later if the speed of

krek1111 [17]

Answer:

The wall is 680 meter away from the person.

Explanation:

Given data

Speed of sound = 340 $\frac{m}{s}$

Given that Persons said hello toward the opposite side she has an echo hello 4 seconds later means it takes 2 seconds for the sound to reach the wall & again 2 seconds to reach the persons ear.

Therefore the distance between the person & wall is

D = speed × Time

D = 340 × 2

D = 680 meter

Therefore the wall is 680 meter away from the person.

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3 years ago

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slavikrds [6]

power received will always remain same and does not depends on the distance

it will be same as the power of source

$P = 3 mW$

now the energy released by one photon is given as

$E = \frac{hc}{\lambda}$

$E = \frac{6.6* 10^{-34}* 3 * 10^8}{760 * 10^{-9}}$

$E = 2.6 * 10^{-19} J$

now let say N photons per second released

$N * 2.6 * 10^{-19} = 3 * 10^{-3}$

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3 years ago

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nasty-shy [4]

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Explanation:

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3 years ago

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kari74 [83]

Answer:

Explanation:

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3 years ago

Read 2 more answers