sign convention वाक्य

Although signs for these values vary, sign convention usually dictates positive curvature when convex and negative when concave.
Throughout this article we work with a metric signature that is mostly positive ( ); see sign convention.
Engineering descriptions of the computation of bending moments can be confusing because of unexplained sign conventions and implicit assumptions.
In an important sign convention, work that adds to the internal energy of the system is counted as positive.
With this now often used sign convention for work, the first law for a closed system may be written:

In particular, many undergraduate physics textbooks use an alternate sign convention in which convex surfaces of lenses are always positive.
An alternate sign convention is to consider the work performed " on " the system by its surroundings as positive.
It is common to take a different sign convention for this equation than one typically does when defining fundamental solutions.
This latter convention has the convenient advantage that the s and p sign conventions are the same at normal incidence.
The choice of sign for time-dependence, exp (-" i?t " ), dictates the sign convention for the imaginary part of permittivity.