The wavelength is the distance that the wave travels in each cycle. The wave travels 345 meters in each second. Let the wavelength of this wave be $\lambda$ . That's the distance the wave travels in one cycle.

The frequency of the sound wave is 1 000 Hz, meaning that there are 1 000 cycles in each second. The wave travels a distance of 1 000 wavelengths in one second. That would be a distance of $1,000\;\lambda$ .

From the speed of the wave, the wave travels 345 meters in one second. In other words,

$1,000\;\lambda = 345$ .

$\lambda = \dfrac{345}{1,000} = 0.345\;\text{m}$ .

To generalize:

$\lambda = \dfrac{v}{f}$ ,

where

$\lambda$ wavelength of the wave,
$v$ the speed of the wave, and
$f$ the frequency of the wave.

3 0

3 years ago

• How does AC work?

Juli2301 [7.4K]

AC reverses the current in periods, and the current flows in 2 directions.
DC only flows in one direction and is constant.

AC is typically used to transfer power over long distances from a generator to your home, stepping it up after it's generated to send it over the distance, then stepping it back down so that it is usable in your home.

DC is used typically inside of devices, as it sends a certain amount of electricity through the wires.

Nicolas Tesla, was ripped off by Edison to replace his DC stations with AC instead. ^^

4 0

3 years ago

A force of 10N is making an angle of 30with the horizontal. Its vertical componentwill be;​

A force of 10N is making an angle of 30with the horizontal. Its vertical componentwill be;