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
Scrat [10]
2 years ago
15

15. A travelling wave is described by the equation y(x,t)= 0.003 cos (20 x + 200t) where y and x are

Physics
1 answer:
Bess [88]2 years ago
7 0

Answer:

T = 3.14 10⁻²  s

Explanation:

The general equation for a traveling transverse wave is

           y = A sin (k x - wt +Ф)

where w is the angular velocity that is related to the period and Ф is the phase of the oscillation

           w = 2π / T          (1)

In this case they indicate that the expression of the wave

         y = 0.003 cos (20 x + 200t)

if we use the relationship of the double angles

          a = kx - wt

          b = Ф

          sin (a + b) = sin a cos b + sin b cos a

for the case Ф = 90 we have

          sin (a + b) = cos b

we substitute

          y = A cos (kx -wt)

with an initial phase of fi = 90º

if we compare the terms of the two expressions

         A = 0.003 m  

         k = 20 m⁻¹

         w = -200  rad/s

the negative sign indicates that the wave goes to the left

           

if we clear from equation 1

          T = 2π / w

          T = 2π / 200

          T = 3.14 10⁻²  s

You might be interested in
How many protons are in Calcium? (* Hint: The Atomic number of Calcium is 20).
ryzh [129]

Answer:

The answer to your question is: 20

Explanation:

Atomic number is the number of proton and atom has. Each element has a specific number of protons, if the number of protons change, then this is a new element.

Mass number is the number of protons and neutrons and atom has.

                       Mass number = protons + neutrons

Data

Number of protons = ?

Atomic number = 20

Then,

           atomic number = number of protons = 20

3 0
2 years ago
Which observation is the best evidence that some colors of visible light are
Effectus [21]

Answer:

id say D

Explanation:

because its the only answer that has to do with colors and visable light

but A and B also have to do with eachother so i feel like it could be with one of those but it def isnt C

I am sorry if i am wrong, let me know tho!

8 0
3 years ago
Read 2 more answers
What energy transformation takes place in the<br> solar panel?
aliina [53]
I think it’s the first option
3 0
3 years ago
How do the groups of the periodic table correspond
hichkok12 [17]
They correspond due to the fact that certain elements are grouped together based on the number of valence electrons on the outer shell of their electron configuration. 
For instance, sulfur (S) has 6 electrons in the outer shell, as it is in the 6th group EXCLUDING transition metals (note, never take these into account, as their charge is always +2; a cation)

6 0
3 years ago
Chứng minh V=kq/r từ mối liên hệ giữ E và V
Marat540 [252]

Answer:V=Aq=KQr

Explanation:

Không biết V bạn kí hiệu ở đây là gì nhỉ? Có phải là điện thế?

Điện thế tại 1 điểm trong điện trường được định nghĩa là công làm vật dịch chuyển từ vị trí đó đến vô cùng. V = A/q

Chứng minh thì được, nhưng chỉ e bạn không có hiểu biết về nguyên hàm, tích phân nên không hiểu.

- Xét tại vị trí cách điện tích Q một đoạn x, khi đó điện tích q sẽ chịu 1 lực: dF=KQ.qx2

Điện tích q dịch chuyển 1 khoảng dx rất nhỏ. Khi đó công do lực điện trường gây ra là:

dA=dF.dx=KQ.qx2dx

Công để dịch chuyển điện tích q từ vị trí r đến vô cùng là:

A=∫∞rdA=∫∞rKQ.qx2dx=KQ.qr−KQ.q∞=KQ.qr

Theo đúng định nghĩa: V=Aq=KQr

4 0
3 years ago
Other questions:
  • If a topographic map included a 6,000 ft. mountain next to an area of low hills, which would best describe the contour lines on
    8·1 answer
  • Describe a situation when you might travel at a high velocity bit with low acceleration
    7·1 answer
  • How much horsepower does a camaro ss have?
    8·2 answers
  • A car traveling 75 km/h slows down at a constant 0.50 m/s2 just by "letting up on the gas." calculate (a) the distance the car c
    11·1 answer
  • What happens to the entropy of a piece of wood as it is burned?
    10·1 answer
  • Where is cascade range located?
    12·1 answer
  • Which of the following statements is NOT a correct assumption of the classicalmodel of an ideal gas?A. The molecules are in rand
    10·2 answers
  • A ball is dropped from somewhere above a window that is 2.00 m in height. As it falls, it is visible to a person boxing through
    9·1 answer
  • Mia is driving at 15m/s. she accelerates for 6sec and reaches 25m/s what is her acceleration
    10·1 answer
  • El tiempo que habria que esperar para que el dia fuera 1 hora mas largo que es hoy
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!