A wave with a frequency of 1200 Hz propagates along a wire that is under a tension of 800 N. Its wavelength is 39.1 cm. What will be the wavelength if the tension is decreased to 600 N and the frequency is kept constant

The wavelength will be 33.9 cm

Explanation:

Given;

frequency of the wave, F = 1200 Hz

Tension on the wire, T = 800 N

wavelength, λ = 39.1 cm

Where;

F is the frequency of the wave

T is tension on the string

μ is mass per unit length of the string

λ is wavelength

when the tension is decreased to 600 N, that is T₂ = 600 N

Therefore, the wavelength will be 33.9 cm

b) 10 minutes

girls stopped for 10 minutes.

so easy. just google the electromagnetic waves and it’ll pop up.