Calculate the wave length of a water wave with a speed of 20 m/s and a frequency of 2.5 Hz
A. 2
B. 5
C. 8
D. 12

Wavelength of the water wave is 8 m

Explanation:

λ = v/f, where f is the frequency, v is the velocity of the wave

Here, v = 20 m/s and f = 2.5 Hz

⇒ λ = 20/2.5

      = 8 m

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.