A car battery stores 12 V of energy. Of this energy, 9 V converts to electrical energy. The remaining energy converts to thermal energy. From the evidence, what is the efficiency of the battery?

75 %

Step-by-step explanation:

Total energy capacity of battery = 12 V

energy converted into electrical = 9 V

(Note: this energy will be utilized by the battery )

Energy converted into thermal = 12 V - 9 V = 3V

Note: this energy will be wasted by the battery \

Efficiency of battery is   determined by fraction of energy which is actually utilized out of total energy

since only 9 v of energy is utilized out of 12 v available energy

efficiency of battery = 9/12 = 3/4 = 0.75

Efficiency of battery  in percentage = 0.75 * 100 % = 75 %

answer: 298143

step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2