Answer:
57,42 KJ
Explanation:
By a isobaric proces, the expresion for the works in the jpg adjunt. Then:
W = Pa(Vb - Va) = Pa*Vb - Pa*Va ---(1)
By the ideal gases law: PV=RTn
Then, in (1): (remember Pa = Pb)
W = R*Tb*n - R*T*an = R*n*(Tb - Ta) --- (2)
Since we have 1 Kg air: How much is this in moles?
From bibliography: 28.96 g/mol
Then, in 1 Kg (1000 g) there are:
n = 34,53 mol
Finally, in (2):
W = (8,3144 J/K.mol)*(34,53 mol)*(500K - 300K) = 51 419,9 J ≈ 57,42 KJ
Answer:
b I think. sorry if it's wrong
The process that causes liquid rock to move is called convection
Answer:
A. They travel faster in a solid than other mediums
Explanation:
Sound waves travel faster in solids because the density of solids is higher than that of liquids which means that the particles are closer together and sound can be transmitted more easily.
Answer:
25 Nm
Explanation:
Parameters given
Distance of the particle from the origin, r = 2.0 m
Force acting on particle, F = 25 N
Angle of force, θ = 30°
The torque acting on a particle is given as:
τ = r * F * sinθ
Where r = radius of axis of rotation. This is the same as the position of the particle on the x axis.
Therefore, the torque will be:
τ = 2 * 25 * sin30
τ = 25 Nm
The torque acting on the particle is 25 Nm.