Simplify (3mn)4 (with work please)

1. What is the difference between heat capacity, specific heat, and latent heat? 2. Explain what is physically meant by "Degrees

alisha [4.7K]

Answer:

1.

- Heat capacity is defined as the total amount of heat required to increase the temperature of a substance in 1°C.

- Specific heat is defined as the total amount of heat required to increase the temperature of a substance in 1°C per unit mass. Hence this property depends of the mass of the substance.

- Latent heat is the amount of energy absorbed or released by a substance in a phase change (physical change) without a change in temperature.

2.

- Degrees of freedom is the number of parameters that define the configuration of a system. For example, in a system with we want to know about the dynamic in the three dimension x,y,z and also about the rotation around a fixed axe we have four degrees of freedom.

- Equipartition theorem relates the temperature of a system with the average energy of the system (this average is taken for those degrees of freedom that appears quadratically).

I hope this is useful for you

regards

8 0

3 years ago

A road is inclined at an angle of 6°. After driving 5,440 feet

Natalija [7]

<h3>Answer: B) 569 feet</h3>

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Work Shown:

sin(angle) = opposite/hypotenuse

sin(6) = a/5440

5440*sin(6) = a

a = 5440*sin(6)

a = 568.634840176034

a = 569 feet, which shows why <u>choice B</u> is the answer.

This value is approximate. Make sure your calculator is in degree mode. One way to check is to compute sin(30) and you should get 0.5

side note: 569 feet is roughly equal to 0.1078 miles.

4 0

3 years ago

R(-1,-3), S(4,4), T(8,-1)<br><br><br> PLZ HELP ME

Bingel [31]

9514 1404 393

Answer:

see attachments

Step-by-step explanation:

The side lengths are found using the distance formula.

d = √((x2-x1)^2 +(y2-y1)^2)

For example, the length of RS in the first triangle is ...

d = √((4-(-1))^2 +(4-(-3))^2) = √(25 +49) = √74 ≈ 8.602

This same computation is used for all of the sides of the triangles. When the same tedious computation is repeated over and over, I like to use a spreadsheet to do it. In the attached spreadsheet the two points used are the one on the same line as the distance, and the one on the line below. Side lengths are shown in the attachment to 3 decimal places.

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In order to classify the triangle as acute, right, or obtuse, we can compare the side lengths to those of a right triangle. For the purposes of computation in a spreadsheet, it is convenient to compute the middle length side of a right triangle that has the same longest and shortest sides as the triangle we have.

If the computed side is longer than the actual middle side, then the triangle we have is obtuse. If it is shorter, the triangle we have is acute. If it is exactly the same, then the triangle we have is a right triangle.

In every case here, the computed middle side is shorter than the actual middle-length side, so all of the triangles are acute triangles. (The one of problem 39 is isosceles, since two sides are the same length. The others are scalene.)

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The triangles are graphed in the second attachment.

problem 38: RST

problem 39: ABC

problem 40: DEF