True or false, the daily electrical energy needs of 20 average homes......?

can be supplied by the energy released by burning a single kilogram of coal.


TRUE OR FALSE





HELP!


also help with this :








True or false, it is possible to have $1000 and lose 250% of it due to a very poor investment.True or false, the daily electrical energy needs of 20 average homes......?
US average is 1.2 kW Per home





In 1 day -%26gt; 24kW x 24horus = 576 kW-Hours.





33 MJ = 9 kW-Hours.





576/9 = 64


30 % , than number 210 Kg (False).-True or false, the daily electrical energy needs of 20 average homes......?
US average is 1.2 kW per home, or 24 kW for 20.





In 1 day that is 24kW x 24hrs = 576 kW-hours.





Amount of energy in coal varies with type, but typical is 33 MJ/kg





33 MJ = 9 kW-hours.





FALSE, it takes 576/9 = 64, it takes 64 kg of coal, not 1.





And if you take the efficiency of a coal plant as 30%, that number is really 210 kg.





.
FALSE.





Assuming 1Kg of Anthracite coal, contains about 35500KJ which is about 9.7KW-H. One typical US house use over 10KW-H per day.





TRUE for second question. If you short a stock rises very much in price your loss can be limitless. If you short a stock at $1000 and it goes to $2500 you have lost 250%.
I'm trying to figure out question one myself for a math test but for question two i might be able to help. 250% of $1000 is $2500. so you cant lose $2500 from $1000 considering you cant owe money from an investment.
False