Acurrent i flows through a rectangular bar of copper with cross sectional area a, length l, density p, molar mass m and conductivity o. a uniform magnetic field b is applied perpendicular to the direction of current flow (a) make a drawing of this situation, clearly indicating locations where there is an accumu or negative charge. find an expression for the resulting induced electrical field eind in terms of b, the electron charge e, and relevant properties of the copper bar [12 marks lation of positive (b) find an expression for the ratio of egnd and the electric field associated with the current ecur. estimate this ratio if a = 3.75 x 10-4 m2, / = 0.20 m, b 0.10 t, p 8.96 g/cm3, 63.54 g/mole, and o = 5.92 x 107 a/v. m [6 marks (c) determine the poynting vectors associated with eind and ecur, and estimate the corre- sponding stored electromagnetic linear momentum 9 marks] (e) what do you expect the linear momentum associated with the motion of charges in the 3 marks system to be, and why?

answer; equivalent to a one(1) horsepower motor;

-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

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this