The melting of an ice cube is considered a physical change.
Answer:
W = - 118.24 J (negative sign shows that work is done on piston)
Explanation:
First, we find the change in internal energy of the diatomic gas by using the following formula:
where,
ΔU = Change in internal energy of gas = ?
n = no. of moles of gas = 0.0884 mole
Cv = Molar Specific Heat at constant volume = 5R/2 (for diatomic gases)
Cv = 5(8.314 J/mol.K)/2 = 20.785 J/mol.K
ΔT = Rise in Temperature = 18.8 K
Therefore,
Now, we can apply First Law of Thermodynamics as follows:
where,
ΔQ = Heat flow = - 83.7 J (negative sign due to outflow)
W = Work done = ?
Therefore,
<u>W = - 118.24 J (negative sign shows that work is done on piston)</u>
The branch of science which deals with celestial objects, space, and the physical universe as a whole.
Online definition so if you’re using it for school work I recommend re-wording!
Answer:
2v
Explanation:
The function of the velocity is:
v = v0 + a.t, where v is the top speed, v0 is the initial speed, a is the acceleration and t the time.
Both the tortoise and the hare start at rest, so v0 = 0. For the tortoise:
v = a.t
For the hare:
v' = a't', but a' = a and t' = 2t
v' = a*2t
v' = 2*at
v' = 2v