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anzhelika [568]
3 years ago
7

Samantha walked 5km/h . how long did it take to her to travel 15 km? ​

Physics
1 answer:
valkas [14]3 years ago
4 0

Answer:

3hrs is the answer

Explanation:

time=d/t

t=15/5 hrs

t=3 hrs

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True [87]

Answer: Student 2

Explanation: Iron nail and a paperclip are conductors because they are made of metal. A rock, rubber band, and wooden stick are insulators because they cannot conduct electricity.

7 0
2 years ago
A sample of helium has a volume of 12.7 m3. The temperature is raised to 323 K at which time the gas occupies 32.5 m3? Assume pr
jasenka [17]

Answer: The original temperature was

T_{1}=126.51K

Explanation:

Let's put the information in mathematical form:

V_{1}=12.7m^{3}

T_{1}=?

V_{2}=32.5m^{3}

T_{2}=323K

P_{1}=P_{2}=3atm

If we consider the helium as an ideal gas, we can use the Ideal Gas Law:

PV=nRT

were <em>R</em> is the gas constant. And <em>n</em> is the number of moles (which we don't know yet)

From this, taking R=0.08205746\frac{atm.l}{mol.K},  we have:

n=\frac{P_{2}V_{2}}{RT_{2}}

⇒n=3.67mol

Now:

T_{1}=\frac{P_{1}V_{1}}{nR}

⇒T_{1}=126.51K

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3 years ago
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ludmilkaskok [199]

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the faster an object moves the more kinetic it has. the more mass an object has, the more kinetic energy it has.

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Which materials are the best thermal insulators?
MrMuchimi
I think that the answe is gasses.
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3 years ago
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The fastest man alive can run the 100 meter dash in 9.58 seconds, calculate average speed in meters per second
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Answer:

100 ÷ 9.58 = 10.44 (approximate answer)

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