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Papessa [141]
3 years ago
5

Write a 150 word paragraph or two that describes at least three everyday things that exist or occur because of science. Make sur

e you use examples different from those given in the lesson.
Physics
2 answers:
allsm [11]3 years ago
8 0

Explanation:

Everything occurring around us and in nature in a result of science. Right through day and night all the phenomenon occurring in nature is science.

Examples of it are :

1. When we put the milk or water in a gas stove to heat, the water or the milk starts boiling. This is because the as the temperature increases the atoms of the water or milk starts absorbing the energy and starts vibrating and colliding with the neighboring atoms, thus transferring the heat within the liquid. Thus the milk or water starts to boil.

2. The sun rises in the east and sets in the west. This is a natural phenomenon that occurs because of the rotation of the earth in its own axis.

3. Plants make food with the help of sunlight. This is a process called photosynthesis, where plants make food by absorbing energy from the sunlight and water form the soil thus producing oxygen and taking in carbon dioxide.

All these three events occurs or exists because of science.

Andreyy893 years ago
3 0

almost everything artafitial would have been made because of science. However nothing natural would exist because of science. All science does is look around and see what's up.

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Answer:

the work is done by the gas on the environment -is W= - 3534.94 J (since the initial pressure is lower than the atmospheric pressure , it needs external work to expand)

Explanation:

assuming ideal gas behaviour of the gas , the equation for ideal gas is

P*V=n*R*T

where

P = absolute pressure

V= volume

T= absolute temperature

n= number of moles of gas

R= ideal gas constant = 8.314 J/mol K

P=n*R*T/V

the work that is done by the gas is calculated through

W=∫pdV=  ∫ (n*R*T/V) dV

for an isothermal process T=constant and since the piston is closed vessel also n=constant during the process then denoting 1 and 2 for initial and final state respectively:

W=∫pdV=  ∫ (n*R*T/V) dV =  n*R*T  ∫(1/V) dV = n*R*T * ln (V₂/V₁)

since

P₁=n*R*T/V₁

P₂=n*R*T/V₂

dividing both equations

V₂/V₁ = P₁/P₂

W= n*R*T * ln (V₂/V₁)  = n*R*T * ln (P₁/P₂ )

replacing values

P₁=n*R*T/V₁ = 2 moles* 8.314 J/mol K* 300K / 0.1 m3= 49884 Pa

since P₂ = 1 atm = 101325 Pa

W= n*R*T * ln (P₁/P₂ ) = 2 mol * 8.314 J/mol K * 300K * (49884 Pa/101325 Pa) = -3534.94 J

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Answer:

Explanation:

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Answer:

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