The speedometer of a car moving to the east reads 55 mph. it passes another car that moves to the west at 55 mph. the cars have the same a. velocity b. speed c. same speed and velocity d. neither the same speed nor the same velocity

-- The cars have the same speed.

-- The magnitudes of their velocities are equal.

-- Each car's velocity is the negative of the other's.

Pick choice-B.

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

their crystal patterns have been disrupted by stress