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.

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science

What is the average distance between air molecules at STP?

a.
b.
c.
d.

Physics & Space Science