3 years ago

Label the sound wave- amplitude, wavelength, crest, trough

Physics

1 answer:

enot [183]3 years ago

7 0

Answer:

A - Crest, B - amplitude, C - wavelength, D - trough

Explanation:

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A(n) 1400-kg car going at 6.32 m/s in the positive x direction collides with a 2900-kg truck at rest. The collision is totally i

tresset_1 [31]

Answer:

a) Acceleration of the car is given as

$a_{car} = -21 m/s^2$

b) Acceleration of the truck is given as

$a_{truck} = 10.15 m/s^2$

Explanation:

As we know that there is no external force in the direction of motion of truck and car

So here we can say that the momentum of the system before and after collision must be conserved

So here we will have

$m_1v_1 + m_2v_2 = (m_1 + m_2)v$

now we have

$1400 (6.32) + 2900(0) = (1400 + 2900) v$

$v = 2.06 m/s$

a) For acceleration of car we know that it is rate of change in velocity of car

so we have

$a_{car} = \frac{v_f - v_i}{t}$

$a_{car} = \frac{2.06 - 6.32}{0.203}$

$a_{car} = -21 m/s^2$

b) For acceleration of truck we will find the rate of change in velocity of the truck

so we have

$a_{truck} = \frac{v_f - v_i}{t}$

$a_{truck} = \frac{2.06 - 0}{0.203}$

$a_{truck} = 10.15 m/s^2$

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3 years ago

what is the energy of an electromagnetic wave that has a frequency of 8.0 x 10^15 Hz? Use the equation...

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(C)

Explanation:

$E = hf = (6.626×10^{-34}\:\text{J•s})(8.0×10^{15}\:\text{Hz})$

$= 5.3×10^{-18}\:\text{J}$

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3 years ago

Label the sound wave- amplitude, wavelength, crest, trough​

Label the sound wave- amplitude, wavelength, crest, trough