1.what is true about heat capacity and specific heat?

a) only heat capacity accounts for mass.

b) both heat capacity and specific heat account for mass.

c) neither specific heat nor heat capacity accounts for mass.

d) only specific heat accounts for mass.

2. which of the following factors is not used in calculating the specific heat of a substance?

a) mass

b) temperature change

c) heat required for a temperature change

d) melting point

3. the amount of heat needed to raise 250 g of a substance by 15 k is 2,930 j. what is the specific heat of the substance ?

a) 0.78

b) 11,000

c) 780

d) 1.1 × 10^7

4. if 50 g of liquid water [c = 4,180 j/(kgk)] changes temperature in a calorimeter from 298 k to 348 k, then how much heat is transferred?

a) 10.5 j

b) 10.5 kj

c) 72.7 j

d) 100 kj

good for her? ? where is the question?

-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