The period of a certain wave is 20 seconds. what is the frequency of this wave? 0.05 waves/sec 10 waves/sec it depends on the medium. it depends on the speed of the wave.

The frequency of the wave is 0.05 Hz.

How do you calculate the frequency?

The frequency and period of a wave are inversely related to each other.

Given that the time period t is 20 seconds. The frequency f can be calculated as given below.

Hence we can conclude that the frequency of the wave is 0.05 Hz.

To know more about the frequency and time period, follow the link given below.

link.

'Period' and 'frequency' are reciprocals.
Either one is (1 / the other one) .

If the period is 20seconds, then the frequency is 1/(20 seconds)

= 0.05 per second

= 0.05 Hz .

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.

A. they hold atoms  together with a molecule.its a force that exist between molecules. hope this .