Answer:
length = 1.24m
Explanation:
velocity = frequency x wavelength
wavelength = velocity/frequency
w = 343/69 =4.97m
length = wavelength/4
length =4.97/4 =1.24m
Answer:


Explanation:
m = Mass of electron = 
B = Magnetic field = 0.22 T
K = Kinetic energy of electron = 
q = Charge = 
v = Velocity of electron
r = Radius of curved path
Kinetic energy is given by

The speed of the electron is 
The force balance of the system is given by

The radius of the curved path is 
Answer:
The speed of the wave as it travelled through the brass bell is;
B. 4,700 m/s
Explanation:
The given parameters are;
The wavelength of the sound wave produced from the brass bell,
= 3.5 m
The wavelength of the wave in the brass bell,
= 47 m
The frequency of the wave in the brass bell, f = 100 Hz
The given equation for wave speed, v = f × λ
Therefore, the speed of the wave as it travelled through the brass bell,
, is given as follows;
= f ×
= 100 Hz × 47 m = 4,700 m/s
The speed of the wave as it travelled through the brass bell =
= 4,700 m/s
In elastic
collision, both the kinetic energy and momentum are conserved. Conservation
means that both the kinetic energy and momentum will have the same values
before and after elastic collision.
<span>As the
object A has low mass than object B. Hence upon collision, object B moves
forward, while object A will move backward. So option "C" is correct. </span>
Answer:
286
Explanation:
p1v1/T1=p2v2/T2
then subtitude your values
T2=760*0.65*273/210*0.040
T2=135/8.4=16+273=289