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You set a tuning fork into vibration at a frequency of 723 Hz and then drop it off the roof of the Physics building where the ac

zaharov [31]

Answer:

Explanation:

Given

Original Frequency $f=723\ Hz$

apparent Frequency $f'=697\ Hz$

There is change in frequency whenever source move relative to the observer.

From Doppler effect we can write as

$f'=f\cdot \frac{v-v_o}{v+v_s}$

where

$f'=$ apparent frequency

v=velocity of sound in the given media

$v_s=$ velocity of source

$v_0=$ velocity of observer

here $v_0=0$

$697=723\cdot (\frac{343-0}{343+v_s})$

$v_s=(\frac{f}{f'}-1)v$

$v_s=(\frac{723}{697}-1)\cdot 343$

$v_s=12.79\approx 12.8\ m/s$

i.e.fork acquired a velocity of $12.8 m/s$

distance traveled by fork is given by

$v^2-u^2=2as$

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

$v_s^2-0=2\times 9.8\times s$

$s=\frac{12.8^2}{2\times 9.8}$

$s=8.35\ m$

5 0

3 years ago

Work/Power problem with friction

Kisachek [45]

Answer:

This is the formula

Explanation:

−(0.54 m/s)2

2(−1.67 m/s2)

so this is the step by taking the mean of the maximum value of friction with the minimum value you can get the average force of friction

3 0

3 years ago

Read 2 more answers

Will this circuit work

Lyrx [107]

Answer:

yes

Explanation:

6 0

3 years ago

What is the speed of a cheetah that travels 176.4 meters in 4.5 seconds?

Ugo [173]

Answer:

$\boxed{ \bold{ \boxed{ \sf{39.2 \: m/ {s} \: }}}}$

Explanation:

Given,

Distance travelled ( d ) = 176.4 meters

Time taken ( t ) = 4.5 seconds

Finding the speed of a cheetah

Speed $\sf{ = \frac{distance \: travelled}{time \: taken} }$

$\sf{ = \frac{176.4}{4.5} }$

$\sf{ = 39.2 \: m/ {s} \: }$

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Let's learn about Speed  :

Suppose a body moves 20 m in 2 seconds, either on a curved path or on a straight path. So , 10 m is the distance travelled by the body in each second which can be written as 10 m/s. This is called speed of the body. Thus, Speed is defined as the distance travelled per unit time. It is the rate of distance travelled by a body.

Mathematically,

$\boxed{ \bold{ \sf{speed = \frac{distance \: travelled}{time \: taken} }}}$

In SI system, the unit of distance is metre and time is second. Thus , the SI unit is speed is m/s.

Hope I helped!

Best regards!!

8 0

3 years ago

If a person walks at the rate of 5.25 mi/hr how pond does it would it take for someone to walk 35.5 miles

seraphim [82]

Answer: I’m assuming you meant how long instead of how pond? If so then it would take approximately 6.762 hours

Explanation:

5.25 x 6.762 = 35.5005

8 0

3 years ago