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
LekaFEV [45]
3 years ago
6

At a certain harbor, the tides cause the ocean surface to rise and fall a distance d (from highest level to lowest level) in sim

ple harmonic motion, with a period of 12.4 h. how long does it take for the water to fall a distance 0.250d from its highest level?
Physics
1 answer:
Rashid [163]3 years ago
8 0
T = 12.4 h, x(t) = .250 d (displacement)
The total amplitude is half of the distance d from the highest to lowest level. 
Using the equation x(t) = x(m) cos(wt + φ), we get: 

.250d = .5d cos(wt + φ) 
To find w, use the equation w = 2π / T 

.250d = .5d cos((2π / 12.4)t + φ) 

.250d = .5d cos((2π / 12.4)t + 0) 

Solve the equation for t. 
.250d / .5d = cos ((2π / 12.4) t) 
arccos(.5) = 2π / 12.4 * t 
arccos(.5) * 12.4 / 2 / π = t 
t = 2.066666 hours
You might be interested in
The force of gravity on a 1 kg object on the Earth's surface is approximately 9.8 N. For the same object in low-earth orbit arou
mojhsa [17]

Answer:

g = 8.61 m/s²

Explanation:

distance of the International Space Station form earth is 200 Km

mass of the object = 1 Kg

acceleration due to gravity on earth = 9.8 m/s²

mass of earth = 5.972 x 10²⁴ Kg

acceleration due to gravity = ?

r = 6400 + 200 = 6800 Km = 6.8 x 10⁶ n

using formula

 g = \dfrac{GM}{r^2}

 g = \dfrac{6.67\times 10^{-11}\times 5.972\times 10^24}{(6.8\times 10^6)^2}

        g = 8.61 m/s²

3 0
3 years ago
Is the moon blue????????
Zolol [24]
No, according to many pictures taken in space, the moon is white. However, on rare occasions, the moon appears blue.

Hope this helps! ☺♥
7 0
3 years ago
Read 2 more answers
How can professional education improve life of people?<br>​
FrozenT [24]

Answer:

Professional education as a science has been defined as a field of educational science that studies the growth of a person into a profession and the related problems. It refers to organized education aimed at the knowledge and skills needed in the profession and working life, as well as growing into active citizenship and membership of society. Professional education as a discipline studies vocational training, skills and learning related to the profession and working life.  

It enables young people and adults to pursue goal-oriented learning with the aim of acquiring and developing the necessary skills in the profession and creating the conditions for independent professional activity and continuous development in the profession.

7 0
3 years ago
Many industries are powered via distant power stations. Calculate the current flowing through a 7,300m long 10. copper power lin
Oliga [24]

Answer:

Current, I = 1000 A

Explanation:

It is given that,

Length of the copper wire, l = 7300 m

Resistance of copper line, R = 10 ohms

Magnetic field, B = 0.1 T

\mu_o=4\pi \times 10^{-7}\ T-m/A

Resistivity, \rho=1.72\times 10^{-8}\ \Omega-m

We need to find the current flowing the copper wire. Firstly, we need to find the radius of he power line using physical dimensions as :

R=\rho \dfrac{l}{A}

R=\rho \dfrac{l}{\pi r^2}

r=\sqrt{\dfrac{\rho l}{R\pi}}

r=\sqrt{\dfrac{1.72\times 10^{-8}\times 7300}{10\pi}}

r = 0.00199 m

or

r=1.99\times 10^{-3}\ m=2\times 10^{-3}\ m

The magnetic field on a current carrying wire is given by :

B=\dfrac{\mu_o I}{2\pi r}

I=\dfrac{2\pi rB}{\mu_o}

I=\dfrac{2\pi \times 0.1\times 2\times 10^{-3}}{4\pi \times 10^{-7}}

I = 1000 A

So, the current of 1000 A is flowing through the copper wire. Hence, this is the required solution.

4 0
3 years ago
According to ohm's law if you don't change the value of the resistor &amp; you double the voltage in a circuit the amount of cur
Nana76 [90]

They double!! Hope im not too late!!

3 0
3 years ago
Other questions:
  • Lumbar nerves transmit signals that allow us to?
    12·2 answers
  • An airplane is flying at an altitude of 2,910 m, has mass of 5,320 kg, and experiences a drag force of 530 N. How much force mus
    12·1 answer
  • Which statement best explains the relationship between the wavelengths and the frequencies of all the waves in the electromagnet
    12·1 answer
  • Match these items and the phrases with which they are associated.
    15·1 answer
  • How long will it take an airplane to go 800 miles if it is traveling at an average speed of 650 miles per hour?
    11·1 answer
  • A Canyon ball is fired from the ground level in angle of 35 from the ground at a speed of 150 m/s ignore air resistance calculat
    10·1 answer
  • The amount of air resistance acting on an object depends on the objects
    15·1 answer
  • 5. Annie drags her little red wagon with a mass of 5.00 kg, up a hill that has an angle of
    10·1 answer
  • Compare the two branches of physical science
    14·1 answer
  • in the two cases shown the mass and the spring are identical but the amplitude of the simple harmonic motion is twice as big in
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!