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7nadin3 [17]
3 years ago
7

Jenny and Fred both play a long note on their trombones. A stationary observer hears the sound increasing and decreasing repeate

dly in
loudness. Which of these must be true?
A. The sound waves from the two trombones have slightly different frequencies.
B. The sound waves from the two trombones have the same frequency.
C. The sound waves from the two trombones have slightly different amplitudes.
D. The sound waves from the two trombones have the same wavelength.
E. The sound waves from the two trombones have slightly different velocities.
Physics
2 answers:
lilavasa [31]3 years ago
7 0
E=the sound waves from the trombones have slightly different velocity
Brrunno [24]3 years ago
5 0

Answer:

its E

Explanation:

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Hitman42 [59]

The height of the object will be -5.19 cm

A concave mirror's reflecting surface curves inward and away from the light source. Light is reflected inward to a single focus point via concave mirrors. Concave mirrors, in contrast to convex mirrors, produce a variety of images depending on the object's to the mirror.

Given an object 24.0 cm from a concave mirror creates a virtual image at -33.5 cm. if the image is 7.25 cm tall

So let,

v =  Image distance from the mirror = -33.5 cm

u = object distance from the mirror (concave) = 24 cm

hi = Image height = 7.25 cm

h = height of the object = ?

Using below formula to find height of the object

-v/u = hi/h

Putting all value in the formula we get

-(-33.5)/(-24) = 7.25/h

h = -5.19 cm

Therefore the height of the object will be -5.19 cm

Learn more about Concave mirror here:

brainly.com/question/3727024

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spayn [35]

Answer:

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According to law of Conservation of energy, the amount of energy at the used up at the start is equal to that at the end.

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torisob [31]
28 degrees celsius converts to 82.4 degrees in Fahrenheit :) 
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As you are looking for a new tennis partner. People should keep in mind that they should go for the one who most likely demonstrate good sportsmanship

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