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sergey [27]
2 years ago
5

A child sits on a dock and notices that 8 wavelengths pass the end of the dock in 4 seconds. What is the

Physics
1 answer:
jeyben [28]2 years ago
6 0
The frequency of the waves are 0,5
This is because the frequency of the wave is calculated by dividing the speed by the wavelength.
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1 kg air in a piston-cylinder assembly is heated at constant pressure, resulting the expansion of the volume. the initial temper
rewona [7]

Answer:

57,42 KJ

Explanation:

By a isobaric proces, the expresion for the works in the jpg adjunt. Then:

W = Pa(Vb - Va) = Pa*Vb - Pa*Va ---(1)

By the ideal gases law: PV=RTn

Then, in (1): (remember Pa = Pb)

W =  R*Tb*n - R*T*an = R*n*(Tb - Ta) --- (2)

Since we have 1 Kg air: How much is this in moles?

From bibliography: 28.96 g/mol

Then, in 1 Kg (1000 g) there are:

n =  34,53 mol

Finally, in (2):

W =  (8,3144 J/K.mol)*(34,53 mol)*(500K - 300K) = 51 419,9 J ≈ 57,42 KJ

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3 years ago
I need help with this. I think I got it correct, but I wanna make sure.
kicyunya [14]

Answer:

A because the bigger it is the the more force needs to act apond it

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3 0
3 years ago
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What would be the result of an alpha particle coming into a magnetic field?
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The right answer for the question that is being asked and shown above is that: "C) The alpha particle will be deflected in a curve path. " the result of an alpha particle coming into a magnetic field is that <span>C) The alpha particle will be deflected in a curve path. </span>
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After a long day you go home in your friend's really fancy sports car which has a sun-roof on the top and a spoiler (a little wi
mixas84 [53]

Answer:

B: air pressure inside the car drops suddenly

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Air in the car drops suddenly because the roof region has lowered pressure than the atmospheric pressure usually varying with the speed of the car

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