A blue ball is thrown upward with an initial speed of 22.8 m/s, from a height of 0.7 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 9.9 m/s from a height of 29.5 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2. 1) What is the speed of the blue ball when it reaches its maximum height?
0
m/s
2) How long does it take the blue ball to reach its maximum height?
2.35
s
3) What is the maximum height the blue ball reaches?
27.22242
m
4) What is the height of the red ball 3.64 seconds after the blue ball is thrown?
17.7290323
m
5) How long after the blue ball is thrown are the two balls in the air at the same height?
4
s
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6) Which plot correctly shows the velocity of the two balls as a function of time? Three plots of velocity vs time for the red and blue balls
A
B
C

-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