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Llana [10]
4 years ago
9

Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up

Physics
1 answer:
kirza4 [7]4 years ago
5 0

Answer:

I believe the answer is b

Explanation:

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Because when liquids are cooled the molecules slow down and that causes liquids to freeze

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3 years ago
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100 points for this easy question :D<br> What's Coulomb's Law? (in your own words)
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depending on the object the force pressing in on the object are equal with the quantity of the object.

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A helium balloon is filled to a volume of 2.88 x 103 L at 722 mm Hg and 19°C. When the balloon is released, it rises to an alti
inn [45]

Answer:

V₂=4.57 x 10³ L

Explanation:

Given that

V₁= 2.88 x 10³ L

P₁=722 mm  Hg

T₁ = 19°C

T₁ =292 K

P₂=339 mm Hg

T₂= - 55°C

T₂=218 K

Lets take final volume = V₂

We know that ideal gas equation

PV = m R T

By applying mass conservation

\dfrac{P_1V_1}{RT_1}=\dfrac{P_2V_2}{RT_2}

\dfrac{722\times 2.88\times 10^3}{292}=\dfrac{339\times V_2}{218}

V₂=4.57 x 10³ L

Therefore volume will be 4.57 x 10³ L

3 0
3 years ago
A square, single-turn coil 0.132 m on a side is placed with its plane perpendicular to a constant magnetic field. An emf of 27.1
marta [7]

Answer:

0.35 T

Explanation:

Side, a = 0.132 m, e = 27.1 mV = 0.0271 V, dA / dt = 0.0785 m^2 / s

Use the Faraday's law of electromagnetic induction

e = rate of change of magnetic flux

Let b be the strength of magnetic field.

e = dФ / dt

e = d ( B A) / dt

e = B x dA / dt

0.0271 = B x 0.0785

B = 0.35 T

6 0
3 years ago
Two identical automobiles are
Phantasy [73]

Answer:

i think that it is b but I could be wrong

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