**** Physics MCQ doubts ***

[Martee100]

Repeat by mistake

 

[Sajeeb Chowdhury]

I have some doubts could someone clear. I would be really grateful!

alright in q18 effiency = power out / power in

power out = 150*10^(3) ===> in watt

40 x 10^(6) x 20 ====> energy in 20 litres
power in = -----------------------------
3600 =====> 20 liters per hour means that the engine ws run fr 1 hr which is 3600 seconds

 

[stareaj]

Please tell ll
Physic As oct 2010 / 12 mcq 22 and 34
May 2011/12 mcq 15,16,24

 

[stareaj]

Also
May 2011/11 mcq 14 and 15
Oct 2011 /13 mcq 25 and 17

 

[stareaj]

Please explain asappp thanks!!!