True or false the refraction of a wave is how many wavelengths pass a fixed point each second

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3

An electromagnetic radio wave is received by a transmitter before it is converted to a sound wave. the radio wave has a wavelength of 23,076 m and a frequency of 13,000 hz. what velocity is the wave traveling at before the transmitter converts it to a sound wave? a 1.76 m/s b 0.56 m/s c 3.31 × 102 m/s d 3.00 × 108 m/s