Answer:
Explanation:
The amount of heat energy of any material to get moved per meter length for per unit change in temperature is called coefficient of thermal conductivity.
The value of coefficient of thermal conductivity is different for different materials.
Explanation:
Mass of the diskshaped grindstone, m = 1.1 kg
Radius of disk, r = 0.09 m
Angular velocity,
Time, t = 42.4 s
We need to find the frictional torque exerted on the grindstone. Torque in the rotational kinematics is given by :
I is moment of inertia of disk,
So, the frictional torque exerted on the grindstone is .
c) only from warmer areas to colder areas.
The second principle of thermodynamics states that heat can only flow from a hotter body to a cooler one. Specifically, Clausius statement says that is not possible for heat to move by itself from a lower temperature body to a higher temperature body.
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Take wire and a nail strip 2 in of wire then wrap it around a nail