Can anyone help me with questions a and c
1 answer:
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Answer:
(a) λ=77×10⁻⁶m
(b)Yes its enough to examine entire eye,
(c)λ=16.65μm.
Explanation:
The ultrasonic sound are used to detect problems in human body by using device consisting of transmitter and detector .
The speed of sound in human tissue is 1540m/s.
The wavelength of sound is 20MHz.
(a) let the velocity of sound in human tissue is v = 1540m/s.
v=fλ
λ= =
= 77×10⁻⁶m
λ=77×10⁻⁶m
(b) we can scan effectively upto the depth of about 500λ
500λ=500× (77×10⁻⁶)= 3.85cm
Yes its enough to examine entire eye,
(c) In air the velocity of sound is 331m/s.
λ= =
= 16.65μm
λ=16.65μm.
Answer:
0.3619sec
Explanation:
Given that
Mass,m=148 g
Length,L=13 cm
Velocity,u'(0)=10 cm/s
We have to find the position u of the mass at any time t
We know that
Where
u(0)=0
Substitute the value
Substitute u'(0)=10
Substitute the values
Period =T = 2π/8.68
After half period
π/8.68 it returns to equilibruim
π/8.68 = 0.3619sec