Period = reciprocal of ('1' divided by) the frequency = 1/256 = 0.00390625 second
The frequency is the reciprocal of the period; in this case, divide 1 / 4x10-7.
T = 1/f T = 1/(50 Hz) = .02 sec
The answer is in the question! 5 Hz Also, a wavelength cannot be 5 cycles - wrong units.
Wavelength = (speed)/(frequency)Frequency = 1/periodso wavelength = (speed) x (period)Speed = (20 meter/min) x (1 min/60 sec) = 1/3 meter/secWavelength = (speed) x (period) = (1/3 meter/sec) x (30 sec) = 10 metersThe correct choice is a .
I've got no idea what a "5 cycle wavelength" is. However, I would just apply this formula: v = fλ, where v is the velocity (speed in m/s) of the wave, f is the frequency (in hertz), and λ is the wavelength (in m).
Frequency = 1/period = 1/5.5 = 0.182 Hz(rounded)
The period is the reciprocal of the frequency. 1 / 2 million Hz = 500 ns or 0.5 us (microseconds).
The frequency is the reciprocal of the period; in this case, divide 1 / 4x10-7.
Time period T = 1 / frequency f. Frequency f = 1 / time period T. T = 1 / f = 1 / 200 = 0.005 seconds = 5 milliseconds.
You are supposed to use the basic formula for waves: speed = wavelength x frequency. In this case, you have to solve for frequency. (The period is the reciprocal of the frequency.)
A period can't be 4 Hz; those are the wrong units. If the period is 1/(4Hz), then the frequency is 4Hz. If the period is 4 seconds, then the frequency is 0.25 Hz. They are inversely related.
Overtone
T = 1/f T = 1/(50 Hz) = .02 sec
You solve this as follows: 1) Decide on a number for the speed of sound. Note that the speed of sound in air is quite different to the speed of sound in water, for example. Convert this speed to meters/second, if it isn't already in meters/second. 2) Divide the speed by the wavelength, to get the frequency. 3) The period is simply the reciprocal of the frequency.
Divide the speed of sound by the wavelength, to get the frequency. The period is the reciprocal of the frequency. The speed of sound in air is about 343 meters/second, but it depends on temperature. The speed of sound in other materials is quite different from the speed of sound in air.
Mix it with a local oscillator whose frequency is (the IF frequency) away from the frequency of the FM signal you're interested in.
The answer is in the question! 5 Hz Also, a wavelength cannot be 5 cycles - wrong units.