Solar
If a solar panel array of 110 panels produces 352 kw/hr, how many kw does each panel part produce per hour?
3.2 kw/hr
If a wind farm of 200 three-blade turbines has five turbines with one damaged blade each and two turbines with two damaged blades each, how many blades must be replaced? How many operational blades are on the farm?
9 blades; 591 blades.
An acre of corn produces 235 gallons of ethanol per acre. How many acres must be grown to power a vehicle for a 1,000-mile trip if the vehicle maintains an average of 9 miles per gallon?
0.439 acres
A solar panel fully charges a battery in fi ve hours in full sunlight. What percentage of an eight-hour period of full sun is fi ve hours?
62.5%
If ¾ of the turbines on a 150-turbine wind farm are inactive, what percentage of them are active?
25%
If 2,000 cows produce 1,200 cu. ft. of methane per day, how many cows would be needed to increase production by 15%?
2300 cows
If an electric motor powered by a solar panel draws 2 amps of electricity at a volume of 9 volts, how many ohms of resistance is generated by the motor? (Formula) Ohms = Volts/Amps
4.5 ohms
A wind turbine has a rotor radius (r) of 150 feet. How much surface area do the blades consume when the blades spin? π= 3.14 (Formula) πr²
70,650 sq. ft.
If a biodiesel producer stores the fuel in standard 55 gallon drums measuring 35 inches tall and 23 inches in diameter, how many cubic inches of space is each drum when empty?
Formula: πr²·h π = 3.14 d = 2r
r = radius
14534.275 cubic inches