Question

a steam engine has an efficiency of 20%.It is given and energy of 1000 cal/min, what is actual work done by it in joules and in calories
20 points will be awarded for this ques​

Answer 1

Explanation:

n=output power/inputpower ×100

20=(x/1000)×100

x=200cal/min

P=w/t

200=w/1

w=200j

Answer 2

Explanation:

let the total amount of energy be x

efficiency of the steam engine = 20%

efficient energy = 1000 calories

ATQ

20%of x= 1000

20/100*x=1000

x=1000*100/20= 5000 calories