Factorise<br><br>a² - 10 a + 24 + 6b-9b²<br><br>PLZ PLZ HELP.....

A string passing over a smooth pulley carries a stone at one end. While its other end is attached to a vibrating tuning fork and

nasty-shy [4]

Answer:

correct option is C) 2.8

Step-by-step explanation:

given data

string vibrates form = 8 loops

in water loop formed = 10 loops

solution

we consider mass of stone = m

string length = l

frequency of tuning = f

volume = v

density of stone = $\rho$

case (1)

when 8 loop form with 2 adjacent node is $\frac{\lambda }{2}$

so here

$l = \frac{8 \lambda _1}{2}$ ..............1

$l = 4 \lambda_1\\\\\lambda_1 = \frac{l}{4}$

and we know velocity is express as

velocity = frequency × wavelength .....................2

$\sqrt{\frac{Tension}{mass\ per\ unit \length }}$ = f × $\lambda_1$

here tension = mg

so

$\sqrt{\frac{mg}{\mu}}$ = f × $\lambda_1$ ..........................3

and

case (2)

when 8 loop form with 2 adjacent node is $\frac{\lambda }{2}$

$l = \frac{10 \lambda _1}{2}$ ..............4

$l = 5 \lambda_1\\\\\lambda_1 = \frac{l}{5}$

when block is immersed

equilibrium eq will be

Tenion + force of buoyancy = mg

T + v × $\rho$ × g = mg

and

T = v × $\rho$ - v × $\rho$ × g

from equation 2

f × $\lambda_2$ = f × $\frac{1}{5}$

$\sqrt{\frac{v\rho _{stone} g - v\rho _{water} g}{\mu}} = f \times \frac{1}{5}$ .......................5

now we divide eq 5 by the eq 3

$\sqrt{\frac{vg (\rho _{stone} - \rho _{water})}{\mu vg \times \rho _{stone}}} = \frac{fl}{5} \times \frac{4}{fl}$

solve irt we get

$1 - \frac{\rho _{stone}}{\rho _{water}} = \frac{16}{25}$

so

relative density $\frac{\rho _{stone}}{\rho _{water}} = \frac{25}{9}$

relative density = 2.78 ≈ 2.8

so correct option is C) 2.8

3 0

3 years ago

Henry cut a piece of yarn that was 11/6 feet long into two pieces lost two different pairs of fractions that could show the leng

pishuonlain [190]

I need help on that to. We have a test tomorrow and I can't figure it out and I need help:(

3 0

2 years ago

Use the formula r=log10^i where r is the measure of the richter scale i is the intensity, to find the richter scale , measuremen

lara [203]

Hi, thank you for posting your question here at Brainly.

Simply substitute the value of the intensity to the variable i. Taking its logarithm to the base 10, the answer would be 7.8. Hence, 6 million ergs is equivalent to 7.8 based on the Richter scale.

3 0

3 years ago

Read 2 more answers

What is an equivalent way to write the expression without grouping symbols? 7(4−x) Drag and drop the values into the boxes to cr

wlad13 [49]

Answer:

28-7x

Step-by-step explanation:

To write the expression without grouping symbols, multiply the 7 into both terms using the distributive property.

7*4 - 7^x

28-7x

8 0

3 years ago

How can you used absolute value to help determine the distance apart two points are if they are located in a different quadrant

Pie

Step-by-step explanation:

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Sound about accurate

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Don't come without...

Pain!

You made me a, you made me a believer, believer

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Pain

Oh, let the bullets fly, oh, let them rain

My life, my love, my drive, it came from...

Pain!

You made me a, you made me a believer, believer

Last things last

By the grace of fire and flames

You're the face of the future, the blood in my veins, oh-ooh

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But they never did, ever lived, ebbing and flowing

Inhibited, limited 'til it broke open and rained down

It rained down, like...

Pain!

You made me a, you made me a believer, believer

Pain!

You break me down and build me up, believer, believer

Pain

Oh, let the bullets fly, oh, let them rain

My life, my love, my drive, it came from...

Pain!

You made me a, you made me a believer, believe

bolo Kya help cahia

6 0

2 years ago

Factorisea² - 10 a + 24 + 6b-9b²PLZ PLZ HELP.....​

Factorisea² - 10 a + 24 + 6b-9b²PLZ PLZ HELP.....