I added individual steps for clarity. Note that g must be positive if the solution is to be real.
Let me know if you have any questions.
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2 answers:
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Explanation:
The 11Ω, 22Ω, and 33Ω resistors are in parallel. That combination is in series with the 4Ω and 10Ω resistors.
The net resistance is:
R = 4Ω + 10Ω + 1/(1/11Ω + 1/22Ω + 1/33Ω)
R = 20Ω
Using Ohm's law, we can find the current going through the 4Ω and 10Ω resistors:
V = IR
120 V = I (20Ω)
I = 6 A
So the voltage drops are:
V = (4Ω) (6A) = 24 V
V = (10Ω) (6A) = 60 V
That means the voltage drop across the 11Ω, 22Ω, and 33Ω resistors is:
V = 120 V − 24 V − 60 V
V = 36 V
So the currents are:
I = 36 V / 11 Ω = 3.27 A
I = 36 V / 22 Ω = 1.64 A
I = 36 V / 33 Ω = 1.09 A
If we wanted to, we could also show this using Kirchhoff's laws.
Answer:
(a) angle record will be 46°
Explanation:
We have given speed = 33 rpm
Time t = 0.23 sec
We know that 1 revolution = 360°
And 1 minute = 60 sec
So 33 revolution/minute
So angle record by vinyl , which is nearly equal to 46
So angle record by vinyl is 46°
So option (a) will be the correct answer
Answer:
d. 6/5 M.
Explanation:
let the angular velocity =
the radius of sphere (r) =
moment of inertia of solid sphere =
rotational K.E of solid sphere=
=
we represent the mass of hallow sphere=
moment of inertia of solid sphere =
rotational K.E of hollow sphere=
=
NOW,the kinetic energy of solid sphere= 1/2 kinetic energy of hallow sphere
=
2/5M= 1/3
= 3(2/5M)
= 6/5 M