Calculate the wave speed for a wave with a wavelength of 2 m and a frequency of 0.3 Hz. v=lf
a.
0.6 m/s
b. 1.67 m/s
C. 0.15 m/s
d. 2.3 m/s

Act has a 1200: 5 or 240: 1 turns ratio. it is short circuited. what is the maximum current at 1200a primary if we put a 100ohm resistor across the secondary end of the ct. use it as current source circuit.

Which one of the following research methods can show cause and effect

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.