Answer:
1000 Nm
2000 Nm
1.00007 seconds
Explanation:
I = Moment of inertia = 5 kgm²
= Angular acceleration
= Final angular velocity
= Initial angular velocity
t = Time taken
Torque is given by
The torque of the disc would be 1000 Nm
If
The torque of the disc would be 2000 Nm
From equation of rotational motion
It would take 1.00007 seconds to reach 3820 rpm
Answer:
New Resistance = 0.5556 ohm
Explanation:
Resistance = resistivity * length /area
Here since resistivity and length are constant, we only need to see how the resistance increases or decreases with change in area.
New Area = pi * (3*D)^2 / 4
Old Area = pi * D^2 / 4
The ratio of new area / old area is :
Since area increases 9 times, and it is inversely proportional to resistance:
Resistance decreases by 9 times.
So, old resistance = Voltage / Current = 10 / 2 = 5 ohm
New Resistance = 5 / 9 = 0.5556 ohm (decreases by 9 times)
What is the main difference between protons and neutrons?
Answer:
Protons have an electrical charge, but neutrons have no charge.
Hope this helps!!