Acrate of mass 0.812 kg is placed on a rough incline of angle 35.3? . near the base of the incline is a spring of spring constant 1140 n/m.
a crate of mass 0.812 kg is placed on a rough incl
the mass is pressed against the spring a distance x and released. the mass is not connected to the spring, so when the spring reaches its relaxed length, it does not pull back on the mass. instead the mass slides freely up the slope before coming to a stop. the total distance the mass moves (from the compressed point to the final point) is 0.206 m. if the coefficient of kinetic friction is 0.195, how far was the spring compressed?
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-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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one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.