Answer- There are two reasons that we know quotations have been used first is the use of of name of the person who quoted it and secondly the quotation is written inside the quotation marks.
Explanation- Quotation is nothing but using a line that has been already quoted by someone somewhere. Such sentences are normally written inside quotation marks. In the above given paragraph the name of the person who quotes the sentence is also given hence we know that our quotation has been used.
perimeter of a rectangle = 2(L+B)
90=2(L+B)
90/2=L+B
45=L+B
The answer is D. centripetal force
This definition of centripetal force is a force acting towards the center of an object moving in a circular motion. Acceleration is the rate of which velocity changes over a period of time. If you pick a point on say a rotating circle and find the tangential velocity at each point it goes through, the acceleration would be towards the middle.
Answer:


Explanation:
P = 50 N
Q = 30 N
= Angle between the vectors = 
Resultant is given by

Angle of resultant

Magnitude of the resultant is 
Direction of the resultant is 
Answer:

Explanation:
As per ideal gas equation we know that
PV = nRT
here we know that


now we have

now for other case at zero gauge pressure we have


we have now

now the difference in internal energy of air is given as


