In a refrigerator, external work is done by the compressor for the transfer of heat from the cold cooling coils... View Article
Take the reference point home as the origin. 1 hour: With respect to home the person moves to office: Motion... View Article
A heat engine with 100 % efficiency is not possible. For efficiency of heat engine η = 1- t2/ t1,... View Article
In a heat engine the ratio of net work done per cycle by the engine to the total amount of... View Article
(Molar specific heat capacity at constant pressure) – (Molar specific heat capacity at constant volume) is equal to _____. R... View Article
In an adiabatic process work done by gas results in decrease in its internal enegy.
Answer: When an object moves in a straight line in the fixed direction without coming back, it’s displacement and distance... View Article
Velocity can vary when speed is constant.
The correct option is B) Heat. The state variable is defined as the variable which depends only on the initial... View Article
First law of thermodynamics tells that whenever heat is supplied to a system, a part of it increases the internal... View Article
An object is in uniform motion along a straight line if it moves equal distances in equal intervals of time.
In an adiabatic process no heat energy enters or leaves the system so ∆Q= 0 From first law of thermodynamics... View Article
If drops and bubbles are not collapsing under the effect of gravity, it indicates that pressure inside the drop is... View Article
A bar is a metric unit of pressure but is not approved as part of the International System of Units... View Article
According to the second law of thermodynamics, the ordering of one system depends on the disordering of another.
The minimum work is done in case of adiabatic expansion.
Answer: (2) speed When a body is in a uniform circular motion, its speed remains constant but its velocity, angular acceleration,... View Article
The correct answer is (D) The distance is always greater than or equal to the magnitude of displacement Distance Distance is the... View Article
dW = dQ – dU = 140 – 60 = 80 J
Path length and displacement becomes equal if an object does not change its direction.
