I believe that it is petroleum ether.
Hertz is units for frequency. (waves per second)
wavelength = speed/frequency
if you're given the speed use that to calculate, if not then you can probably assume it's a wave of light and use the speed of light (3x10^8 m/s) to calculate.
wavelength = (3x10^8)/(1.28x10^17)
= 0.000000002 m
= 2.34 nm
Hello,
I believe that your answer would be <span>B. water freezes
</span>Hope this helps
Answer:
subscribe other yt chanel
Explanation:
it will help you tu became big
The order of the answers are as follows:
B
C
D
A