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Dimas [21]
3 years ago
11

Physics help please..............

Physics
1 answer:
adoni [48]3 years ago
7 0

Answer:

3.68 m/s

Explanation:

Full answer in the attached picture

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A 10-kg dog is running with a speed of 5.0 m/s. what is the minimum work required to stop the dog in 2.40 s?
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M=10kg W=? W=Fd
v=5.0m/s F=mg
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Researchers have estimated that what to what genes reside within the chromosomes and influence all genetic characteristics
grandymaker [24]
Researchers have estimated that ______ to ______ genes reside within the chromosomes and
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The vapor pressure of ethanol at 293 K is 5.95 kPa and at 336.5 K it is 53.3 kPa. Calculate the enthalpy of vaporization of etha
denis-greek [22]

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H=41.3kJmol^{-1}

Explanation:

The equation relating the the enthalphy, pressure and temperature is expressed as

ln(\frac{P_{2}}{P_{1}} )=\frac{H}{R}(\frac{1}{T_{1}}-\frac{1}{T_{2}} ) \\

Where P is the pressure, H is the enthalphy, and T is the temperature.

since the given values are

T_{1}=293k, \\T_{2}=336.5k\\P_{1}=5.95kPA\\p_{2}=53.3kPA\\and R=8.314J.K^{-1}mol_{-1}

if we insert values, we arrive at

ln(\frac{53.3}{5.95} )=\frac{H}{8.314}(\frac{1}{293}-\frac{1}{336.5} )\\2.19=\frac{H}{8.314}(0.00044)\\H=(2.19*8.314)/0.00044\\H=41,268.8Jmol^{-1}\\H=41.3kJmol^{-1}

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PtichkaEL [24]

Answer:

Short

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3 years ago
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