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Sliva [168]
3 years ago
7

Explain thermodynamics?

Physics
2 answers:
Maurinko [17]3 years ago
7 0

Explanation:

the branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy

VMariaS [17]3 years ago
7 0

Explanation:

Let's start with the most basic thing that is to clarify what thermodynamics is.

Thermodynamics is in charge of studying heat transfers, the capacity of a system to produce work and how energy is converted. Systems that contain <u>particles </u>are studied in this area, rather than systems that contain atoms or molecules.

Now these systems are those that are part of the universe, such as a gas.

There are laws of thermodynamics to explain all this, and they are not theoretical studies but rather studies based on experiences that are directly associated with the aforementioned systems in a state of equilibrium.

These laws are:

  • Zero principle of thermodynamics: It establishes that when two bodies are in thermal equilibrium with a third one, they are in thermal equilibrium with each other.
  • First principle of thermodynamics: It establishes the relationship between work and the transferred heat that is exchanged in a system through internal energy.
  • Second principle of thermodynamics: It states that not all heat can be transformed into mechanical work, although all mechanical work can be transformed into heat.
  • Third principle of thermodynamics: It is the least important of the laws. It is related to the etropy of a substance that is null, and details its behavior when it approaches absolute zero.
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Kepler deduced this law of motion from observations of Mars. What information confirms his conclusion that the orbit of Mars is
Leno4ka [110]

Kepler noticed an imaginary line drawn from a planet to the Sun and this line swept out an equal area of space in equal times, If we then draw a triangle out from the Sun to a planet’s position at one point in time, it is notice that the area doesn't change even after the planet has left the original position say like after 2 to 3days or 2hours. So to have same area of triangle means that the the planet move faster when that are closer to the sun and slowly when they are far from the sun.

This led to Kepler's law of orbital motion.

First Law: Planetary orbits are elliptical with the sun at a focus.

Second Law: The radius vector from the sun to a planet sweeps equal areas in equal times.

Third Law: The ratio of the square of the period of revolution and the cube of the ellipse semi-major axis is the same for all planets.

It is this Kepler's law that makes Newton to come up with his own laws on how planet moves the way they do.

6 0
3 years ago
Julie has decided to manage her weight and has asked her friends for advice. Which of the following statements shows how Julie's
Semenov [28]
The answer to this question is c 
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A force acts on a 5kg object at rest. How fast will the object accelerate on a frictionless surface?
MakcuM [25]

Answer: The answer is C.) 25 m/s^2.

Explanation: If you input 5 as s, you would have to use the exponent 2.  This means that you have to multiply 5 by 5.  5 x 5= 25.  

Edit: Also, because the surface is frictionless, it will make the object go faster too.  Nothing can really slow it down unless something blocks it.

8 0
3 years ago
If a system has 225 kcal of work done to it, and releases 5.00 × 102 kj of heat into its surroundings, what is the change in int
vovikov84 [41]

We can solve the problem by using the first law of thermodynamics:

\Delta U = Q-W

where

\Delta U is the change in internal energy of the system

Q is the heat absorbed by the system

W is the work done by the system on the surrounding


In this problem, the work done by the system is

W=-225 kcal=-941.4 kJ

with a negative sign because the work is done by the surrounding on the system, while the heat absorbed is

Q=-5 \cdot 10^2 kJ=-500 kJ

with a negative sign as well because it is released by the system.


Therefore, by using the initial equation, we find

\Delta U=Q-W=-500 kJ+941.4 kJ=441.4 kJ

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3 years ago
Why is the spectrum of a star called an absorption spectrum?
ladessa [460]
It is called absorption spectrum because a gas of hydrogen will make a line spectrum and if viewed for another angle it would be between a continuum light and a emission line spectrum
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3 years ago
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