Physics/Chemistry: Waves and Sound "HELP PLEASE" BEST ANSWER WILL BE CHOSEN!!!?

Question

HI HELPER! HELLO, MY NAME IS ZALAK AND AND I NEEDED SOME HELP IN CHEMISTRY,MY TEACHER TEACHES FROM HIS OWN METHODS BUT THE FORMULAS HE HAS GIVEN DOES NOT SEEM TO MAKE SENSE: Could someone show me how to work the problems&answers I have a quiz*

My first question:
The generator at a power plant produces 23200V AC. A transformer steps that up to 432000V AC. If there are 2860 turns on the primary, how many turns are on the secondary coil?

-All I know is that the ratios are equal but I do not get it!

My 2nd problem:

Find the wavelength of a 5850000Hz radio waveof a 5850000Hz radio wave. Answer in_______m

-All I know is that wavelength = speed of light (C) / frequency (v)
Speed of light = C = 3.0 x 10^8, but how do I get my answers in "m" the answer I got is 51.282 (is that correct?)

3rd ?::::

A piece of iron is heated to 770 degrees oC. At what wavelength does the emitted radiation peak?
answer must be in_________m


(I have no idea where to start) HELP PLEASE!

Answer 1

1.
53255 is the turns in the secondary
for a step up transformer n2/n1 > 1
n1 = turns in primary
n2 - turns in secondary

v1/v2 = n1/n2

n2 = (v2 * n1 ) / v1 = (432000 * 2860) / 23200 = 53255.17


so secondary turns is 53256

check n2 / n1 is > 1


ans 2. c = f * wavelength

f = 5.85 * 10 ^6 hz
c= 300000000 m/s

hence wavelength = c/ f = 51.282 m
your ans. is correct yaar

ans 3.
"Wien's Law" redirects here. For the historical distribution law, see Wien's Distribution Law.
The wavelength corresponding to the peak emission in various black body spectra as a function of temperature
The wavelength corresponding to the peak emission in various black body spectra as a function of temperature

Wien's displacement law is a law of physics that states that there is an inverse relationship between the wavelength of the peak of the emission of a black body and its temperature.

\lambda_{max} = \frac{b}{T}

where

\lambda_{max} \, is the peak wavelength in meters,
T \, is the temperature of the blackbody in kelvins (K), and
b is a constant of proportionality, called Wien's displacement constant and equals 2.897 7685(51) × 10–3 m K (2002 CODATA recommended value)

wavelength = 0.0028977685 m / 993 k


so the ans is 2.778 micro m

convert temp in deg. to k by adding 273 to it !

Answer 2

for first one it is 5325

for the second one is correct

for third one we have relation Wien's displacement law is a law of physics that states that there is an inverse relationship between the wavelength of the peak of the emission of a black body and its temperature.
wavelenght = b/T

where


wavelengthh is the peak wavelength in meters,
T is the temperature of the blackbody in kelvins (K), and
b is a constant of proportionality, called Wien's displacement constant and equals 2.897 7685(51) × 10–3 m K (2002 CODATA recommended value)

so now you can get it

Answer 3

Relax ZALAK.
1. Somewhere there is a formula about the number of turns being proportional to the step up in voltage or something like volts x turns of primary = volts x turns of secondary. Whatever it is should be what to do.

2. Units units units. Hertz is in sec-1, C is in meter/sec, so wavelength is in meters. The number looks ok.

3. Beats me.

Answer 4

DEAR ZALAK,

FOR YOUR 1ST QUESTION,
Use Vp/Vs=Np/Ns,
Know that,
Vp= 23200V AC and Vs= 432000V AC and Np= 2860,
You substitute this value to the equation,
Then, you get the answer Ns=53255 turns

FOR YOUR 2ND QUESTIONS,
I THINK YOU ARE TOTALLY WRONG!!
BECAUSE IN THIS CASE, WE USE THE SPEED OF SOUND WAVE( RADIO WAVE), NOT THE SPEED OF LIGHT..V=344 m/s,

SO,
Use V=f λ..
Where V=344 m/s, f= 5850000Hz..
The wavelength is 5.88 x 10^-5



Check it out!!!

Answer 5

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