Why should isotherms and heat flow lines be orthogonal or perpendicular to each other?
What will be an ideal response?
Heat flow occurs because of a temperature difference and isotherms have no
temperature difference. Thus heat cannot flow along isotherms, but must be
perpendicular or orthogonal to isotherms.
You might also like to view...
What is the average distance between air molecules at STP?
a. 
b. 
c. 
d. 
Kirchhoff's Rules: Determine the current in the 8.0-? resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.
A. 0.28 A B. 1.3 A C. 1.6 A D. 2.1 A
An 8000 kg satellite is launched from the surface of the earth, and injected into outer space a long distance from the earth. The kinetic energy needed to launch the satellite into outer space is 
A. 
B. 
C. 
D. 
E. 
In which of the following application of technology in the home is radioactivity utilized?
A) a door-bell B) a humidifier C) a smoke detector D) a food sterilizer