If sound travels at 5600 m/s through a steel rod, what is the wavelength, given a wave frequency of 2480 Hz

In a system, when potential energy decreases, then entropy also decreases. true false

If a star is moving toward earth, it is

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.