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2 years ago

How much energy is needed to change the temperature of 50.0 g of water by 15.0oc?

1 answer:

3 0

The amount of energy needed to increase the temperature of a substance by $\Delta T$ is given by:
$Q=m C_s \Delta T$
where
m is the mass of the substance
Cs is the specific heat capacity of the substance
$\Delta T$ is the increase in temperature

In our problem, m=50.0 g, $C_s = 4.18 J/g ^{\circ}C$ (specific heat capacity of water) and $\Delta T=15.0 ^{\circ}C$ , therefore the amount of energy needed is
$Q=mC_s \Delta T=(50.0 g)(4.18 J/g^{\circ}C)(15.0^{\circ}C)=3135 J$

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2 years ago

If the acceleration of motorboat is 4m/s^2 and the motorboat stsrtsfrol.Rest what is velocity after 6.0 s

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Answer:

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3 years ago

A supersonic jet is at an altitude of 14 kilometers flying at 1,500 kilometers per hour toward the east. At this velocity, how f

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Answer:

The jet will fly 2400 km.

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Given the velocity of the jet flying toward the east is 1,500 kmph toward the east.

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In our problem we are given speed and time, we can easily determine the distance using the following formula.

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3 years ago

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Answer:

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1 year ago

A 3220 kg truck is rolling down a frictionless 8.30° slope that is 22.0 m long. If its initial speed was 4.71 m/s, how fast is i

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Answer:

9.2 m/s

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3 years ago

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