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3 years ago

calculate the period of a wave whose frequency is 5 Hz and whose wavelength is 1 cm give your answer in decimal form

Physics

2 answers:

Pavlova-9 [17]3 years ago

8 0

Period T = 1/f, where f = frequency = 5 Hz

T = 1/5 = 0.20 s

Period = 0.20 seconds.

trapecia [35]3 years ago

4 0

The period is the reciprocal of frequency.

Period = 1 / (frequency) = 1 / 5 per sec = 0.2 second.

The wavelength doesn't matter.

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A 1-kilogram mass is attached to a spring whose constant is 21 N/m, and the entire system is then submerged in a liquid that imp

amm1812

Answer:

the required value is $x(t) = \frac{7}{4} e^{-3t}-\frac{3}{4} e^{-7t}$

Explanation:

Given that,

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(a)

since time is 0 then mass is one meter below

so x(0) = 1

Also it start from rest , that implies , velocity is 0 and time is 0

$x'(0) = 0$

substitute the initial condition

$C_1 +C_2 = 1$

$-3C_1-7C_2=0$

Solve the above equation to get C₁ and C₂

$C_1 =\frac{7}{4} and C_2 = -\frac{3}{4}$

substitute for C₁ and C₂ in general solution

$x(t) = \frac{7}{4} e^{-3t}-\frac{3}{4} e^{-7t}$

Thus the required value is $x(t) = \frac{7}{4} e^{-3t}-\frac{3}{4} e^{-7t}$

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