The second law of thermodynamics implies
that
a) heat can be used to do work only if a thermal reservoir at a lower temperature is available.
b) the total energy of a body is the sum of kinetic energies of all its molecules.
c) bodies cool at rates proportional to their temperature excess above their surroundings.
d) energy cannot be destroyed.
Question 2
A uniform rod (length = 2.0 m) is mounted to rotate freely about a horizontal axis that is perpendicular to the rod and that passes through the rod at a point 0.50 m from one end of the rod. If the rod is released from rest in a horizontal position, what is the angular speed of the rod as it rotates through its lowest position?
a. 3.5 rad/s
b. 3.8 rad/s
c. 4.1 rad/s
d. 2.0 rad/s
e. 5.6 rad/s
Countercurrent heat exchange.
Countercurrent heat exchange in dolphin flippers promotes conservation of body heat.
Heat Patterns
Time spent on, paid work and housework, by living arrangements of Canadian
You heat 3.952 g of a mixture of Fe3O4 and FeO to form 4.162 g Fe2O3. The mass of oxygen ...
The radius of the Sun is 6.95 × 108 m. It radiates heat at the rate of 5.32 x 10