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jenyasd209 [6]
3 years ago
10

Please answer these two questions ASAP!! Will mark brainliest and give points!

Physics
2 answers:
Drupady [299]3 years ago
7 0

Answer:

Counter Clockwise Torque = 360 Nm

Clockwise Torque = 240 Nm

Explanation:

As we know that torque is defined as the product of perpendicular force and distance from reference point.

So here as we can see the given figure the force of the left side of support will try to rotate the rod in counter clockwise direction so it is providing counter clockwise torque.

\tau = r \times F

\tau = 9 \times 40 = 360 Nm

Similarly we can see the force of the right side of support will try to rotate the rod in clockwise direction so it is providing clockwise torque.

\tau = r \times F

\tau = 3 \times 80 = 240 Nm

maw [93]3 years ago
6 0
Counter clockwise torque is 360Nm. 
Clockwise torque is 240Nm. 

40 * 9 = 360
80 * 3 = 240
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Explanation:

It just is:)

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A piston of volume 0.1 m3 contains two moles of a monatomic ideal gas at 300K. If it undergoes an isothermal process and expands
seropon [69]

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

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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:

Answers at the bottom!!

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For the first answer: Gamma ray

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