Question

12. The equation of a progressive wave is
y = 4 sin (60t +0.1x) cm. Its velocity is
(A) 600 cm/s in the positive x direction
(B) 600 cm/s in the negative x direction
(C) 300 cm/s in the positive x direction
(D) 300 cm/s in the negative x direction​

Answer 1

Answer:

A group of atoms carrying a charge is known as polyatomic ion. Polyatomic Cation →A group of atoms carrying a positive charge is known as polyatomic cation. Example of polyatomic cation: NH4+ Polyatomic Anion→A group of atoms carrying a negative charge is known as polyatomic anion.

Answer 2

Answer:

Explanation:

the equation of a given progressive wave is  

y=5sin(100πt−0.4πx)                                          

The standard equation of a progressive wave is

=asin(ωt−Kx)                                                  

Comparing (i) and (ii), we get

a=5m,ω=100π rad s  

−1

,k=o.4πm  

−1

 

(1) Amplitude of the wave, a=5m

(2) Wavelength of the wave, λ=  

k

2π

​

=  

0.4π

2π

​

=5m

(3)Frequency of the wave, υ=  

2π

ω

​

=  

2π

100π

​

=50Hz

(4) Velocity of the wave, ν=υλ=(50s  

−1

)(5m)

=250ms  

−1