1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ede4ka [16]
3 years ago
5

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

celeration due to gravity is 9.80 m/s2. Determine how far the tuning fork has fallen when waves of frequency 697 Hz reach the release point?
Physics
1 answer:
zaharov [31]3 years ago
5 0

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

                                       

You might be interested in
You toss a rock of mass mm vertically upward. Air resistance can be neglected. The rock reaches a maximum height hh above your h
skad [1K]

Answer:

The speed of the rock when it is at height h/4 is \dfrac{\sqrt{3gh} }{2}.

Explanation:

At maximum height the final velocity of the rock is equal to 0. Let u is the initial velocity of the rock. Using the conservation of energy to find it as :

u^2=2gh.......(1)

We need to find the speed of the rock when it is at height h/4. Let v' is the speed. Using 3rd equation of motion as :

v'^2=u^2+2as

here a = -g and s = h/4

v'^2=u^2-2g\times \dfrac{h}{4}

Using equation (1) :

v'^2=(2gh)-2g\times \dfrac{h}{4}\\\\v'^2=\dfrac{3gh}{4}\\\\v'=\dfrac{\sqrt{3gh} }{2}

So, the speed of the rock when it is at height h/4 is \dfrac{\sqrt{3gh} }{2}. Hence, this is the required solution.

3 0
3 years ago
Read 2 more answers
Two identical small charged spheres are a certain distance apart, and each initially experiences an electrostatic force of magni
Rom4ik [11]

Answer:

New force, F'=\dfrac{1}{4}F

Explanation:

The electrostatic force between two spheres is given by :

F=\dfrac{kq_1q_2}{r^2}

According to given condition, each of the spheres has lost half its initial charge, new force is given by :

F'=\dfrac{kq_1/2q_2/2}{r^2}

F'=\dfrac{1}{4}\times \dfrac{kq_1q_2}{r^2}

F'=\dfrac{1}{4}F

So, the new force becomes (1/4)th of the initial force. Hence, the correct option is (d).                  

4 0
3 years ago
The property that describes how radily a substance combines chemically with other substances is _____________
goldfiish [28.3K]

This is reactivity. It describes how easily one substance reacts with another

4 0
3 years ago
Using two boxes, design two solar ovens. Before you build, describe your designs. Discuss elements such as materials, box shape,
Marizza181 [45]

Answer:

Find two boxes just a bit smaller than the other. The long sides of the box should be less than twice as long as the short side of the boxes. The smaller box should fit inside the larger box with about 1 inch in each direction to spare. The boxes can be cut down so that they fit together properly. Leave the flaps on the boxes. Buy a small sheet of Plexiglas (tm) a little bit smaller than the width and length of the top of the box. You will also need four pieces of cardboard to use for reflectors.

Explanation:

3 0
2 years ago
Chemical name and a common name for NaOH​
garri49 [273]
Chemical Name: Sodium Hydroxide
7 0
2 years ago
Read 2 more answers
Other questions:
  • How do you producers consumers and decomposers all live in a cycle
    9·1 answer
  • A student is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline.
    5·2 answers
  • If a current of one- or two-tenths of an ampere were to flow into one of your hands and out the other, you would probably be ele
    10·2 answers
  • Two carts with masses of 4.32 kg and 2.66 kg move toward each other on a frictionless track with speeds of 4.86 m/s and 3.93 m/s
    11·1 answer
  • Find the magnitude and angle of a vector given the components: Bx = 7, By=-5​
    7·1 answer
  • A skier leaves the end of a horizontal ski jump at 23.0 m/s and falls through a vertical distance of 3.45 m before landing.
    6·1 answer
  • Newton’s Third Law of Motion states that for every action there is an equal and opposite reaction. Which of these illustrates Ne
    10·1 answer
  • A student drops a ball from a slope. He notices the ball rolling down as shown in the image.
    14·1 answer
  • An ambulance traveled on roads from the hospital 14 kilometers east, then 16 kilometers north to reach an accident. If the ambul
    6·1 answer
  • A 5OKG mass is taken to the moon and the mass determined there, comment on the likely result of the measurement
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!