Part 1: describe the mass and surface temperature of the supergiant stars. part 2: explain where on the hr diagram you would expect to find a supergiant star based on its physical properties.

20 000 - 50 000 K

Explanation:

It would seem impractically possible to measure the mass of a star, however, there is an efficient method to do so. By definition, the temperature of a star is defined by its mass. The brightness of the star define the temperature as well as the temperature. The most massive (and hottest) stars are the super giant stars. These can have temperatures of up to 20 times the mass of the sun. The stars are very hot with temperatures of about 20 000 - 50 000 K.

The super giant stars will be found on the top region of the Hertzsprung-Russell diagram.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this