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2 years ago

PLEASE HELP ME WITH THIS ONE QUESTION

Physics

1 answer:

Kitty [74]2 years ago

6 0

Answer:

Q = 282,000 J

Explanation:

Given that,

The mass of liquid water, m = 125 g

Temperature, T = 100°C

The latent heat of vaporization, Hv = 2258 J/g.

We need to find the amount of heat needed to vaporize 125 g of liquid water. We can find it as follows :

$Q=mH_v\\\\Q=125\ g\times 2285\ J/g\\\\Q=282250\ J$

Q = 282,000 J

So, the required heat is 282,000 J .

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vladimir2022 [97]

Answer:

The value is $t = 3.6 \ days$

Explanation:

From the question we are told that

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Generally the circumfernce of the earth is mathematically evaluated as

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=> $C = 38960.8 \ km$

Generally the time taken is mathematically represented as

$t = \frac{38960.8}{450.0}$

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Converting to days

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2 years ago

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Answer:

A)5524J,

B) 29.2Nm

Explanation:

This question can be treated using work- energy theorem

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2 years ago

3. A sprinter leaves the starting blocks with an acceleration of 4.5 m/s2. What is the

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Hi there! :)

$\large\boxed{v_{f} = 18 m/s}$

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2 years ago

At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 8.0 m above the water. One diver runs of

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Answer:

Number of revolutions=1.532 revolutions

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Given data

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$S=ut+1/2gt^{2}\\ where\\u=0\\So\\8.0m=0+(1/2)(9.8m/s^{2} )t^{2}\\ t^{2}=\frac{8.0m}{0.5*9.8m/s^{2} } \\ t^{2}=1.63\\t=\sqrt{1.63} \\t=1.28s$

So for the number of revolutions she makes is given as

$n=a*t\\n=(1.2rev/s)(1.28s)\\n=1.532revolutions$

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2 years ago

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