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
vovikov84 [41]
4 years ago
13

What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, wi

ll result in the combined wave having an amplitude 0.64 times that of the common amplitude of the two combining waves? Express your answer in (a) degrees, (b) radians, and (c) as a fraction of the wavelength.
Physics
1 answer:
Sergeu [11.5K]4 years ago
5 0

Answer:

Ф = 142.674 degree

Ф = 2.490131057 rad

wavelength  = 0.396316 λ

Explanation:

Given data

combined wave having an amplitude 0.64 times

to find out

answer in degrees,  radians, and fraction of the wavelength

solution

let us consider these two wave equation

Asin(ωt) and the Asin (ωt + Ф)

and here Ф is phase difference

so we say

resultant wave is

Y = Asin(ωt) + Asin (ωt + Ф) =  Asin(ωt + Ф/2) cos ( Ф/2)

so Y = A' sin(ωt + Ф/2)

we know that here resultant wave amplitude is 2A cos ( Ф/2)

so

put A= 0.64 A

so 2Acos ( Ф/2)  = 0.64 A

and Ф/2  = 71.3370

Ф = 142.674 degree

Ф = 2.490131057 rad

so wavelength is  2.490131057 /  2π

wavelength  = 0.396316 λ

You might be interested in
A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. Take the
Lelu [443]

Answer:

Average power output of insect is 2.42W

Explanation:

Workdone by constant force during displacement is given by:

W= F× d cos theta

Where theta is angle between F and d.

Power output due to the force over the interval time is given by:

P= Workdone/change in time

Ginen:

Mass of insect,m= 7.0g= 7/1000 = 0.07kg

Downward force applied by insect,F= 2mg

Distance moved by the wing each stroke=1.5cm=1.5/100= 0.015m

W= F× d cos theta

Where theta=0° since force is in the same direction as the displacement.

W= 2mg×d

W= 2× 0.07 × 9.8 × 0.015

W= 0.02058J

Power output = W/ change in time

Since wings make 117strokes each second time interval is 1/117 = 8.5×10^-3seconds

Power= 0.02058/(8.5×10^-3)

Power= 2.42W

6 0
3 years ago
A metaphor is:
ivolga24 [154]
A metaphor is<span> a comparison between two non related objects where the first object is said to be equal to the second.</span>

The answer is d.
6 0
3 years ago
The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80°. The resulting accelerat
pantera1 [17]

Answer:

b) 2.2 kg

Explanation:

Net force acting on an object is the sum of the  two forces acting on the body.

The net force is calculated using the parallelogram law of vectors.

F =\sqrt{{A^{2}} + B^{2}+2 A B cos \theta}

Here A = 20 N , B = 35 N and θ =80°

Net Force = F = 43.22 N

Acceleration = a = 20 m/s/s

Since F = ma, m = F/a = 43.22 / 20 = 2.161 kg = 2.2 kg

8 0
3 years ago
When working with a razor blade or exacto knife --
stich3 [128]

Answer:

last answer

Explanation:

gripping it with the blade facing downward is the most efficient and safe way to use an exacto knife

6 0
3 years ago
Help meeeeeeeeeeee<br>what is the rheostat and what its ruleeee??​
oee [108]

Answer:

A rheostat is a variable resistor which is used to control current. They are able to vary the resistance in a circuit without interruption. ... It uses only two connections, even when 3 terminals (as in a potentiometer) are present.

Explanation:

6 0
3 years ago
Other questions:
  • Which statement describes why scientific notation is useful? It makes very small numbers into whole numbers. It converts fractio
    9·2 answers
  • Density is both a(n) _______ property and a(n) ___________ property of matter.
    13·1 answer
  • Need 3 examples of unbalanced forces
    7·2 answers
  • Name two objects that use electric motors and are commonly found in houses.
    8·2 answers
  • In a football game, a 90 kg receiver leaps straight up in the air to catch the 0.42 kg ball the quarterback threw to him at a vi
    14·1 answer
  • Gravitational force of attraction “F” exists between two point masses A and B when a fixed distance separates them. After mass A
    10·2 answers
  • An astronaut stands on the surface of an asteroid. The astronaut then jumps such that the astronaut is no longer in contact with
    6·1 answer
  • What is renewable source of energy ​
    8·2 answers
  • If you place a ball on the floor then push it gently to one side, observe the motion of the ball as it rolls down the floor.
    9·2 answers
  • What is the answer to these questions?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!