According to the Hertzsprung-Russell diagram, a star with a relatively low luminosity and a temperature of around 20,000 K is most likely which type of star? A. Supergiant

B. Giant

C. White dwarf

D. Main sequence star​

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?