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2 years ago

The bottom answer choice is -8 sorry it got cut off a little bit

Mathematics

1 answer:

saw5 [17]2 years ago

8 0

Your answer is -4 !!

step 1.) write the number in exponential form with the base of

step 2.) reduce the index of the radical and exponent with

step 3.) with all that being said your answer would be -4 :D

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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

$\sqrt{\frac{mg}{\mu}}$ = 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

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

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

4 years ago

The probability that it will snow in a certain town on January 1st is 0.29 find the probability that in a given year it will not

Mashutka [201]

Answer:

0.71

Step-by-step explanation:

The probability is a chance of an event happening. The probability of assured event is 100% or 1.

If there is no chance of an event happening the probability is zero (0).

The probability of snowing = 0.29

The probability of not snowing = 1 - 0.29

= 0.71

5 0

3 years ago

PLEASE HELP ASAP!!!!

kolbaska11 [484]

Answer:

Step-by-step explanation:

130-89= other angle whic is 41

6 0

3 years ago

100 POINTS! SOLVE FOR X. PIC ATTACHED. Random answers will be reported.

Romashka-Z-Leto [24]

Answer:

x = 29

Step-by-step explanation:

The angles (2x- 10) and (4x+ 16) are consecutive interior angles and therefore are corresponding

<u>Corresponding angles sum to 180</u>

(2x - 10) + (4x + 16) = 180
6x + 6 = 180
6x = 174
x = 174/6
x = 29

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3 years ago

PLEASE HELP! 40 POINTS! state the value only do not use units. do not write x= in your response. Thank you

12345 [234]

Answer:

y=43 (alternate angle)

in triangle ADC

97+y+x=180(,sum of interior angle of triangle is 180)

x=180-97-43

x=40

8 0

3 years ago

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