II. Explain how are bioluminescent light sources different from other luminous objects? III. Complete the following table by identifying energy sources for each energy type listed.
Sources:incandescent lamp, sun , moving car,
strings of piano, trampoline, battery, heater, infra-red lamp
Energy typeSource
Chemical
Sound
Light
Electrical
Heat
Elastic potential
Nuclear
Kinetic

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

The velocity of a car traveling in a straight line increases from 0 meters/second to 30meters/second in 8 seconds. what is the average acceleration of the car?