Question

Describe the amplitude and frequency of the sound wave for a high, loud note. Identify the characteristic of the sound that is connected to each wave property.

Answer 1

amplitude is related to volume
frequency is related to pitch

for a high + loud note would we expect a high or low amplitude? what about high or low frequency?

Answer 2

high amplitude and low frequency i think

Answer 3

high amplitude is good, for a high-pitched sound we would expect a high frequency

Answer 4

For a high loud note wave, there is a high freiquency as well as a high amplitude. The characteristics that are related to these characteristics are;
amplitude = volume
frequency = pitch

Answer 5

not sure about the equal signs, maybe there's another synonym for related you could use

Answer 6

For a high loud note wave, there is a high freiquency as well as a high amplitude. The characteristics that are related to the amplitude and frequency are:
amplitude is linked to volume
frequency is linked to pitch

Answer 7

good

Answer 8

Write two or three sentences to define intensity and to state how intensity changes as the distance from the sound is increased.

Answer 9

intensity = energy of a sound wave over a defined area perpendicular to the direction of propagation

intensity is proportional to 1/distance^2 (inverse square law)

Answer 10

Intensity is a sound wave energy over an assigned region. This is perpendicular to the path of propgation. Intensity changes as the distance from the sound is increased because of the inverse square law. This law tells that intensity is correspondent to 1/distance^2

Answer 11

good, just some minor tweaks

* it's propagation not propgation
* should say "intensity decreases" instead of just "intensity changes" to be more specific

Answer 12

Calculate the energy of light that has a wavelength of 5.43 × 10–^7 m

Answer 13

E = hc/lambda where h = planck's constant, c = speed of light, lamda = wavelength

Answer 14

0.543

Answer 15

not sure if I did this right

Answer 16

I think that's a little off

planck's constant = (6.62607×10^-34)

speed of light = 3.0*10^8

lambda = (5.43 × 10^-7)

therefore E = (6.62607×10^-34)*(3*10^8)/(5.43 × 10^-7) = ?

Answer 17

3.66*10^-19

Answer 18

good, since I used the joules version of planck's constant the final answer will be in joules

Answer 19

I know that every color is absorbed but that color. But I am not explicit on this

Answer 20

well, one color is ~absorbed~ and one color is ~reflected~ (I think those are the "wave interactions" they're looking for?) which one is which?

Answer 21

In this picture of wave interactions, since the blue light bounces off, it is reflected. However, since the red light does not, it is absorbed

Answer 22

A+

so to answer the second question, what color is the object? red or blue?

Answer 23

The color of the object would be blue because it is the one that is reflected

Answer 24

A+ again

that's at least two sentences so I believe that is sufficiently answered

Answer 25

X-rays and visible light are parts of the electromagnetic spectrum. Write three or four sentences to compare these electromagnetic waves with respect to the following properties: wavelength, energy, frequency, and speed.

Answer 26

wavelength, energy, and frequency are pretty straightforward by looking at an EM spectrum

the only tricky one is speed, all electromagnetic radiation travels at the speed of light in a vacuum, so x-rays and visible light would travel at the same speed (given that the medium is the same)

Answer 27

actually wait let me modify that last part a bit

Answer 28

all electromagnetic radiation travels at the speed of light in a vacuum, so x-rays and visible light would travel at the same speed in a vacuum

(i'm actually not sure about other media)

Answer 29

To describe wavelength, the shorter the length the more compressed the wave. The longer the length. For energy, the higher the energy, the more compressed the wave, For frequency, the higher the frequency, the more compressed the wave. To compare x-rays and visible light, they travel at the speed of light a vacuum has

Answer 30

let's try from the beginning ^^

first sentence: compare the wavelengths of x-rays and gamma rays, which one is higher?
second sentence: compare the energies, which one has a higher energy?
third sentence: compare the frequencies, which one has higher frequency?
fourth sentence: compare the speeds

Answer 31

high energy?

Answer 32

for the first one

Answer 33

first sentence: do x-rays or gamma rays have the higher wavelength?

Answer 34

To compare wavelength between x-rays and gamma rays, x-rays have the higher wavelength. To compare energies between x-rays and gamma rays, gamma rays have the higher energy.To compare frequencies between x-rays and gamma rays, gamma rays have the higher frequency. To compare speed between x-rays and gamma rays, gamma rays have the higher speed.

Answer 35

good but check that last sentence again, gamma rays and x-rays have the same speed in a vacuum

anyway I have to go, good luck with your studies, just be careful when you submit your answers b/c some of your posts on here might show up in the plagiarism checker

Answer 36

Thank you so much!