A U-shaped tube, open to the air on both ends, contains mercury. Water is poured into the left arm until the water column is 10.
1 answer:
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Newton's 2nd law
input the value:
Answer:
Explanation:
From the question we are told that:
Potential difference
New Capacitor
Generally the equation for Capacitor capacitance is mathematically given by
Generally the equation for New p.d' is mathematically given by
(a)
The moment of inertia of a uniform-density disk is given by
where
M is the mass of the disk
R is its radius
In this problem,
M = 16 kg is the mass of the disk
R = 0.19 m is the radius
Substituting into the equation, we find
(b) 142.5 J
The rotational kinetic energy of the disk is given by
where
I is the moment of inertia
is the angular velocity
We know that the disk makes one complete rotation in T=0.2 s (so, this is the period). Therefore, its angular velocity is
And so, the rotational kinetic energy is
(c)
The rotational angular momentum of the disk is given by
where
I is the moment of inertia
is the angular velocity
Substituting the values found in the previous parts of the problem, we find