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A copper rod has a length of 1.7 m and a cross-sectional area of 3.6 10-4 m2. One end of the rod is in contact with boiling wate

Lina20 [59]

Answer:

Mass of ice per second melt is 2.74×10^-5Kg/s

Explanation:

Temperature of one end of the copper rod is 100°C boiling point of water and the other end of the rod is 0°C

Temperature difference in the copper rod = 100 - 0 = 100°C

Cross sectional area = 3.6×10^-4m^2

Length of rod , L = 1.7m

Amount of heat transfer from the boiling water to the ice water mix through the copper rod is given by:

Q = KA◇T/ L

Q = (390×(3.6×10^-4)×100°C)/1.7

Q = 14.04/1.7

Q = 8.26J/s

From the equation

Q = mLf

m = Q/ Lf

Where Lf = Latent heat of fusion for water= 3.34×10^5J/Kg

m = 8.26/(3.34×10^5)

m = 2.74×10^-5Kg/s

3 0

3 years ago

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While researching scuba diving, Pablo reads how hot a tank should get while being filled with air. Which law best explains why t

Lady_Fox [76]

Answer:

Gay-Lussac’s law, because as the pressure increases, the temperature increases

Explanation:

First of all, we can notice that the volume of the tank is fixed: this means that the volume of the air inside is also fixed.

This means that in this situation we can apply Gay-Lussac's law, which states that:

"for a gas kept at constant volume, the pressure of the gas is proportional to the absolute temperature of the gas".

Mathematically:

$p\propto T$

where p is the pressure in Pascal and T is the temperature in Kelvin.

In this case, the tank is filled with air: this means that the pressure of the gas inside the tank increases. And therefore, according to Gay-Lussac's law, the temperature will increase proportionally, and this explains why the tank gets hot.

5 0

3 years ago

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g During the contraction of the heart, 65 cm3 blood is ejected from the left ventricle into the aorta with a velocity of approxi

Alisiya [41]

Answer:

The force is $F = 0.1441 \ N$

Explanation:

From the question we are told that

The volume of blood ejected is $V_b = 65cm^3 = 65*10^{-6} \ m^3$

The velocity of the ejected blood is $v = 98 cm/ s = 0.98 \ m/s$

The mass density of blood is $\rho = 1060 \ kg/m^3$

The heart rate is $R = 61 bpm(beats \ per \ miunite) = \frac{61}{60} = 1.0667\ bps$

Generally the average force exerted is mathematically represented as

$F = 2 * \rho * V_b * R * v$

=> $F = 2 * 1060 * (65*10^{-6}) *1.0667 * 0.98$

=> $F = 0.1441 \ N$

8 0

3 years ago

Balance the following chemical equations

IrinaVladis [17]

Answer:

Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below

Always use the upper case for the first character in the element name and the lower case for the second character.

To enter an electron into a chemical equation use {-} or e

To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}. Example: Fe{3+} + I{-} =...

Substitute immutable groups in chemical compounds to avoid ambiguity. For instance equation C6H5C2H5 + O2 = C6H5OH + CO2...

Explanation:

4 0

4 years ago

Describe a situation where you could properly conclude that a set of data is precise but

Orlov [11]

It’s not arrested because if you look closer it’s plug walk I don’t even understand how it talk tho

4 0

3 years ago