Answer / n.mohnesh

FIRST LAW OF THERMODYNAMICS

Answer / justahelper

The first law tells us that energy is neither created nor
destroyed i.e cyclic integral of dQ should be equal to
cyclic integral of dW about a closed cycle

Then, the 2nd law clarifies this relation by specifying that
heat HAS to be rejected in the conversion of heat to work
and all heat supplied cannot be converted to work, some heat
will be stored as internal energy
Hence, dQ-dW=1 means dW work is done out of dQ and the
remaining 1 is the increase in internal energy. Hence, 2nd
law is obeyed here.

Answer / sornakumar

dQ/dW=1 THIS is the first law of thermodyanamics

Answer / sneha more

if the eqn is for process then it obeys first law.
dQ-dW=1 dU=1

if eqn is for cycle then it obeys second law

since,
dQ & dW should not be equal

Answer / ronnie

answer #5 is correct.
here dQ = 1-dW so
dQ is not equal to dW
hence second law of thermodynamics is obeyed....

Answer / anil kumar satri

first law of thermodynamics
for open system dq = dw

so dq-dw=1
dq= dw

What should you do before you start the engine?

0 Answers   NSPCL, RRB,

Which bearing offers lowest friction?

5 Answers  

What is the full for of HRC

8 Answers  

What is meant by laminar flow ?

0 Answers  

Greetings This question is about hydraulics and I request an expert to answer it. A simple hydraulic machine is made up of two heads, a larger one with a larger force inside a wider pipe and a smaller one with a smaller force inside a smaller pipe in width as in the second picture on this link: http://science.howstuffworks.com/hydraulic1.htm The question is this: what happens if the smaller head and the smaller force doesn’t exist but the smaller pipe is high enough to take all the liquid? For example the larger head is 1.00 sqr metre and can go down 1.00m under a weight of 100.00kg. The cross sectional area of the smaller pipe is 0.001 sqr metre. Now when the larger head goes down 1.00m, how high the liquid from the wider pipe can go into the smaller pipe of the cross sectional area of 0.001 sqr metre? Regards

0 Answers  

IN POWER PLANTS NORMARLY BOILER DRUMLEVEL TRIPPING GIVEN AT 20% OF WATER BUT WHY NOT THEY GIVE AT 0% OF WATER?

2 Answers  

Contaminants of fuel oil

0 Answers   RRB,

• What is your weakness?

0 Answers   NTPC,

hi guys ,pls help me......i urgently need previous year question paper for preparation of HPCL (MECHANICAL).pls email me @ mangal_2911@yahoo.co.in

0 Answers  

What is a mechanism?

0 Answers  

why steam power plant is more popular than gas turbine plant?

5 Answers   ME,

How does a super charger work in a car?

0 Answers