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Zigmanuir [339]

4 years ago

9

If a refrigerator is a heat pump that follows the first law of thermodynamics ,how much heat was removed from food inside of the

refrigerator if it released 314j of energy to the room?____joules

1 answer:

Alika [10]4 years ago

4 0

If it follows the 1st law of thermodynamics it would also remove heat of 314J from the food inside the refrigerator.

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irakobra [83]

Answer:

The mass of the block, M =T/(3a +g) Kg

Explanation:

Given,

The upward acceleration of the block a = 3a

The constant force acting on the block, F₀ = Ma = 3Ma

The mass of the block, M = ?

In an Atwood's machine, the upward force of the block is given by the relation

Ma = T - Mg

M x 3a = T - Ma

3Ma + Mg = T

M = T/(3a +g) Kg

Where 'T' is the tension of the string.

Hence, the mass of the block in Atwood's machine is, M = T/(3a +g) Kg

3 0

3 years ago

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in which sample water do the water particle have more energy:5 grams of ice cubes at -10°c or 5 of a liquid water at 20°c?

Veseljchak [2.6K]

liquid water at 20 degrees Celsius

5 0

3 years ago

A mercury thermometer is constructed as

Tamiku [17]

Answer:

The change in height of the mercury is approximately 2.981 cm

Explanation:

Recall that the formula for thermal expansion in volume is:

$\frac{\Delta V}{V_0} =\alpha_V\, \Delta\, T\\\Delta V = V_0\,\, \alpha_V\,\,\Delta C$

from which we solved for the change in volume $\Delta V$ due to a given change in temperature $\Delta T$

We can estimate the initial volume of the mercury in the spherical bulb of diameter 0.24 cm ( radius R = 0.12 cm) using the formula for the volume of a sphere:

$V_0=\frac{4}{3} \pi \, R^3\\V_0=\frac{4}{3} \pi \, (0.12\,cm)^3\\V_0=0.007238\,cm^3$

Therefore, the change in volume with a change in temperature of 36°C becomes:

$\Delta V = V_0\,\, \alpha_V\,\,\Delta C\\\Delta V = 0.007238229\, cm^3\,(0.000182)\,(36)\\\Delta V=0.0000474248\, cm^3$

Now, we can use this difference in volume, to estimate the height of the cylinder of mercury with diameter 0.0045 cm (radius r= 0.00225 cm):

$V_{cyl}=\pi r^2\,h\\h =\frac{V_{cyl}}{\pi r^2} \\h=\frac{0.0000474248\, cm^3}{\pi \, (0.00225\,cm)^2} \\h=2.98188 \,cm$

8 0

3 years ago

Which is defined as a disturbance in matter that carries energy from one place to another?

Furkat [3]

an acoustic wave carries energy

6 0

4 years ago

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What is grassland animal

vaieri [72.5K]

Carnivores like lions, wolves, cheetahs and leopards are also found in temperate grasslands. Other animals of this region include deer, prairie dogs, mice, jack rabbits, skunks, coyotes, snakes, foxes, owls, badgers, blackbirds, grasshoppers, meadowlarks, sparrows, quails, hawks and hyenas.

6 0

3 years ago

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