Which statement is true? a. speed is a scalar quantity and velocity is a vector quantity. b. speed and velocity are both scalar quantities. c. speed and velocity are both vector quantities. d. speed is a vector quantity and velocity is a scalar quantity. e. speed and velocity are neither a scalar quantity nor a vector quantity.

A.Speed is a scalar quantity and velocity is a vector quantity.

TRUE

Speed is the ratio of distance and time while velocity is the ratio of displacement and time

B.Speed and velocity are both scalar quantities.

FALSE

velocity is a vector quantity and it is ratio of displacement and time

C.Speed and velocity are both vector quantities.

FALSE

Speed is not a vector quantity but it is a scalar quantity

D.Speed is a vector quantity and velocity is a scalar quantity.

FALSE

Speed is scalar as it depends on distance while velocity is a vector which depends on displacement

E.Speed and velocity are neither a scalar quantity nor a vector quantity.

FALSE

Speed is scalar while velocity is vector

-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

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