A125-g metal block at a temperature of 93.2 °c was immersed in 100. g of water at 18.3 °c. given the specific heat of the metal ( s = 0.900 j/g·°c), find the final temperature of the block and the water

34.17°C

Explanation:

Given:

mass of metal block = 125 g

initial temperature = 93.2°C

We know

  ..................(1)

Q= Quantity of heat

m = mass of the substance

c = specific heat capacity

c = 4.19 for H₂O in

= change in temperature

Now

The heat lost by metal = The heat gained by the metal

Heat lost by metal =

Heat gained by the water =

thus, we have

=

⇒

Therefore, the final temperature will be = 34.17°C

i think the answer would be b

-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