Tripling the separation between charges changes the potential energy of a pair of point charges by a factor of

A. 3.
B. 9.
C. 1/3.
D. 1/9.
E. 1 (no change).


C. 1/3.

Physics & Space Science

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Given the equations below, which description best fits the physical situation? ?       ?

A. A projectile's displacement two seconds after being fired upward with a speed of 30.0 m/s. B. A projectile's displacement two seconds after being fired upward with a speed of 40.0 m/s. C. A projectile's displacement two seconds after being fired upward with a speed of 50.0 m/s. D. A projectile's displacement two seconds after being fired upward with a speed of 60.0 m/s. E. A projectile's displacement two seconds after being fired upward with a speed of 80.0 m/s.

Physics & Space Science

If y = 0.02 sin (30x - 400t) (SI units), the velocity of the wave is

a. 3/40 m/s b. 40/3 m/s c. 60p/400 m/s d. 400/60p m/s e. 400 m/s

Physics & Space Science

Consider a system consisting of two Einstein solids P and Q in thermal contact. Assume that we know the number of atoms in each solid and ?. What do we know about the system if we also know the total energy of the combined system?

A. Its macrostate B. Its microstate C. Its macropartition D. Its microstate and macropartition E. Its macrostate and macropartition F. Its macrostate and microstate T. Its macrostate, microstate, and macropartition

Physics & Space Science

What is the difference between a supernova and a nova?

What will be an ideal response?

Physics & Space Science