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
valkas [14]
2 years ago
13

You watch distant Sally Homemaker driving nails into a front porch at a regular rate of 1 stroke per second. You hear the sound

of the blows exactly synchronized with the blows you see. And then you hear one more blow after you see the hammering stop. Calculate the distance of Sally from you.
Physics
1 answer:
slamgirl [31]2 years ago
3 0

Answer:

343m

Explanation:

From the question Sally hits one blow every second

However, the sound is delayed by that same amount of time (1 sec)

If the speed of sound is 343m/s

Speed = Distance/Time

Speed = 343m/s

Time = 1s

Distance = Speed x Time

= 343 x 1 = 343m

You might be interested in
The function x = (1.2 m) cos[(3πrad/s)t + π/5 rad] gives the simple harmonic motion of a body. At t = 9.7 s, what are the (a) di
nlexa [21]

Answer and Explanation:

Let:

x(t)=Acos(\omega t+ \phi)

The equation representing a simple harmonic motion, where:

x=Displacement\hspace{3}from\hspace{3}the\hspace{3}equilibrium\hspace{3}point\\A=Amplitude \hspace{3}of\hspace{3} motion\\\omega= Angular \hspace{3}frequency\\\phi=Initial\hspace{3} phase\\t=time

As you may know the derivative of the position is the velocity and the derivative of the velocity is the acceleration. So we can get the velocity and the acceleration by deriving the position:

v(t)=\frac{dx(t)}{dt} =- \omega A sin(\omega t + \phi)\\\\a(t)=\frac{dv(t)}{dt} =- \omega^2 A cos(\omega t + \phi)

Also, you may know these fundamental formulas:

f=\frac{\omega}{2 \pi} \\\\T=\frac{2 \pi}{\omega}

Now, using the previous information and the data provided by the problem, let's solve the questions:

(a)

x(9.7)=1.2 cos((3 \pi *(9.7))+\frac{\pi}{5} ) \approx -0.70534m

(b)

v(9.7)=-(3\pi) (1.2) sin((3\pi *(9.7))+\frac{\pi}{5} ) \approx 9.1498 m/s

(c)

a(9.7)=-(3 \pi)^2(1.2)cos((3\pi*(9.7))+\frac{\pi}{5} )\approx -62.653m/s^2

(d)

We can extract the phase of the motion, the angular frequency and the amplitude from the equation provided by the problem:

\phi = \frac{\pi}{5}

(e)

f=\frac{\omega}{2 \pi} =\frac{3\pi}{2 \pi} =\frac{3}{2} =1.5 Hz

(f)

T=\frac{2 \pi}{\omega} =\frac{2 \pi}{3 \pi} =\frac{2}{3} \approx 0.667s

8 0
2 years ago
Read 2 more answers
How do I eat an apple?<br> I'm having trouble eating an apple.
mafiozo [28]

Answer:

You bite it then you chew the piece you bit off. :)

Explanation:

5 0
2 years ago
Read 2 more answers
What is the correct equation kinetic enery
Ivahew [28]

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2.

4 0
3 years ago
Will each of the following actions increase the distance between the diffraction spots? a) Increase the distance between the scr
diamong [38]

Answer:

A) no

B) no

C) yes

D) no

E) yes

5 0
2 years ago
What relationship between the sun and earth did copernicus formulate?
Dmitrij [34]

Answer:

The astronomical model created and published by Nicholas Copernicus in the year 1543 is called Copernican heliocentrism. The model set the Sun in immobile position near the center of the solar system with Earth, as well as the other planets, spherical, epicycled and at consistent frequencies around it.

5 0
3 years ago
Other questions:
  • Which of the following is the best name for N2O? dinitrogen monoxide nitrogen monoxide nitrogen oxide nitrogen oxygen
    7·2 answers
  • A race car makes one lap around a track of radius 50m in 90sec. what is the average velocity?
    12·1 answer
  • An electron in the n = 6 level of the hydrogen atom relaxes to a lower energy level, emitting light of λ = 93.8 nm .find the pri
    14·2 answers
  • A mechanic uses a hydraulic car jack to lift the front end of a car to change the oil. The jack used exerts 8,915 N of force fro
    6·1 answer
  • A positive charge is moved from one point to another point along an equipotential surface. The work required to move the charge:
    6·1 answer
  • A particle is confined to a one-dimensional box that is 50 pm long. What is the smallest possible uncertainty in momentum for th
    9·1 answer
  • Metals can be described as
    12·1 answer
  • A 2.5 kg , 20-cm-diameter turntable rotates at 80 rpm on frictionless bearings. Two 500 g blocks fall from above, hit the turnta
    6·1 answer
  • When a teenager plugs his stereo into the same outlet as the television and lamp, all three devices stop working. What is the mo
    8·2 answers
  • Can someone plz check if what I typed is good :)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!