3 years ago

What happens to metal railroad tracks during the heat of a summer day

Physics

2 answers:

Oksanka [162]3 years ago

4 0

The railroad tracks will expand because the heat waves make them bigger

lorasvet [3.4K]3 years ago

4 0

The heat could make the rails expand or even rust if there was some wind.

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Positive acceleration

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3 years ago

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a family drives from boston (100 miles away) to new york (500 miles away) in 10 hours . How fast were they were traveling?

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It should be 60 mph. Because if you divide 600 by 10 it’s 60

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2 years ago

Charges q, q, and – q are placed on the x-axis at x = 0, x = 4 m, and x = 6 m, respectively. At which of the following points do

MrRissso [65]

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Explanation:

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2 years ago

Electronic flash unit cameras contain a capacitor for storing the energy used to produce the flash. In one such unit the flash l

Stolb23 [73]

Answer:

(A) 421 J energy stored in the capacitor for one flash.

(B) The value of capacitance is 0.0537 F

Explanation:

Given :

(A)

Time $t = \frac{1}{675}$

Average power $P = 2.7 \times 10^{5}$ W

From power equation,

$P= \frac{E}{t}$

So energy in one light is given by,

$E = Pt$

$E = 2.7 \times 10^{5} \times \frac{1}{675} = 400$ J

Since efficiency is 95 % so we can write, energy stored in one flash,

$E_{tot} = \frac{400}{0.95} = 421$ J

(B)

From the formula of energy stored in capacitor,

$E = \frac{1}{2}C V^{2}$

Where $E = E_{tot}$ and $V = 125$ V

$C = \frac{2E}{V^{2} }$

$C = \frac{2 \times 421}{15625}$

$C = 0.0537 F$

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3 years ago

In the space below, explain why you agree or disagree with the first statement: Each person in a family has the same traits. The

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Answer:

I disagree.

Explanation:

Yes, traits may be similar, but it all depends on the dominant and recessive alleles that are passed on. No one person can look alike. Even with twins, a widow's peak or close lobes can be different.

I hope this was the brainliest answer! Thank you for letting me help you.

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3 years ago