Telephone signals are often transmitted over long distances by microwaves. what is the frequency of microwave radiation with a wavelength of 3.5 cm ?

Explanation:

Given that, the wavelength of the microwave radiation is,

And as we know that the speed of the wave is,

Now the frequency of the microwave radiation can be calculated as

Here, f is the frequency of microwave signal, v is the speed of the signal and   is the wavelength of signal.

Now put all the given variable in above equation.

This the required frequency.

a is the best answer your welcome

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg