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Amanda [17]
3 years ago
13

The conversion of potential energy in coal into the kinetic energy that heats steam is an expression of: Answer the first law of

thermodynamics the second law of thermodynamics both laws neither law
Physics
1 answer:
erastova [34]3 years ago
7 0

Let me think about this........ correct me if I am wrong....... Laws of thermodynamics 1) Energy cannot be created nor destroyed. It is transferred. 2) All spontaneous reactions will increased the entropy of the universe (More disorder) 3) The entropy of the crystal lattice structure at 0 K is zero PE(coal) --> Steam(K.E) ................ This will increase entropy and also conversion of energy. So BOTH LAWS is my final answer. Wait...... I would like to use a lifelines...... I want to phone my Physical chem professor. *Ring Ring.........* Me: Hello, I wanted to make sure if I got the correct answer. Chem prof: You dont need my help, since you got the right answer. Me: WOOT!!!!!!!

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Which material is used to reduce friction ?
Iteru [2.4K]

Answer:MOST COMMON METHOD IS USING A LUBRICANT -

A lubricant is a substance, usually organic, introduced to reduce friction between surfaces in ... medical examination. It is mainly used to reduce friction and to contribute to a better and efficient functioning of a mechanism. ... For lubricant base oil use, the vegetable derived materials are preferred

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Make the surfaces smoother. ...

Lubrication is another way to make a surface smoother.

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6 0
3 years ago
1. A student is biking to school. She travels 0.7 km north, then realizes something has fallen out of her bag.
Snezhnost [94]

Explanation:

(a) Displacement of an object is the shortest path covered by it.

In this problem, a student is biking to school. She travels 0.7 km north, then realizes something has fallen out of her bag.  She travels 0.3 km south to retrieve her item. She then travels 0.4 mi north to arrive at school.

0.4 miles = 0.64 km

displacement = 0.7-0.3+0.64 = 1.04 km

(b) Average velocity = total displacement/total time

t = 15 min = 0.25 hour

v=\dfrac{1.04\ km}{0.25\ h}\\\\v=4.16\ km/h

Hence, this is the required solution.

8 0
3 years ago
Why do we balance chemical equations
antiseptic1488 [7]
So it could follow the correct mass for the atom
5 0
2 years ago
________ is an indication of how near the air is to saturation rather than the actual quantity of water vapor in the air. mixing
Degger [83]
The correct answer is "Humidity". good luck!
6 0
2 years ago
Which type of committee has members from both the House and the Senate?
vagabundo [1.1K]
Joint committees have similar purposes as select committees, but they are made up of members from both the House and the Senate. They are set up to conduct business between the houses and to help focus public attention on major issues.
3 0
3 years ago
Read 2 more answers
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