Answer:
Option (d)
The angular momentum of the system is 5 Kg-m²/s
Explanation:
Angular momentum: Angular momentum is the product of angular velocity and of moment of inertia.
Angular momentum is dented by L
And the unit of angular momentum is Kg-m²/s
L= I×ω
I is momentum of inertia
ω is angular velocity.
The unit of angular velocity is red/s.
Momentum of inertia : Momentum of inertia is the sum square the perpendicular distance from the rotational axis to of product mass of each particle of the body.
The S.I unit of momentum of inertia is kg-m²
The angular momentum of a system is:
L= ∑I ω
=∑ Mr²ω [ Since ]
Given , M= 1 kg, r₁=1 m , r₂= 2 m and ω = 1 rad/s.
The angular momentum of the system is
L= Mr₁²ω+Mr₂²ω
= Mω(r₁²+r₂²)
= {1×1 (1²+2²)}
=5 Kg-m²/s
Answer:
The value is or 21.45%
Explanation:
From the question we are told that
The first reservoir is at steam point
The second reservoir is at room temperature
Generally the maximum theoretical efficiency of a Carnot engine is mathematically evaluated as
=>
=>
Answer:
18 Ω
Explanation:
As K and F are at the same voltage, we can redraw the diagram as in figure 2
Series resistances add directly, so we get figure 3
Adding parallel resistances gets us to figure 4
Now we can move two 6Ω resistances for clarification in figure 5
As the voltage between C and J will be identically split between D and H, there will be no voltage drop across the middle 6Ω resister and no current through it, identical to an infinite resistance, so that 6Ω can be eliminated as in figure 6
Add series resistances to get to figure 7
Add parallel resistances to get to figure 8
Add series resistances to get to figure 9
