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
il63 [147K]
2 years ago
13

If you detected radio signals with an average wavelength of 67 cm and suspected that they came from a civilization on a distant

Earth-like exoplanet, roughly how much of a change in wavelength (in cm) should you expect to detect as a result of the orbital motion of the distant exoplanet?
Physics
1 answer:
Crazy boy [7]2 years ago
8 0

Answer:

0.0066553 cm

Explanation:

v = Earth's average orbital velocity = 29.8 km/s

c = Speed of light = 3\times 10^8\ m/s

\lambda = Wavelength = 67 cm

\Delta\lambda = Change in wavelength

The Doppler shift is given by

\dfrac{v}{c}=\dfrac{\Delta \lambda}{\lambda_0}\\\Rightarrow \Delta \lambda=\dfrac{v\lambda_0}{c}\\\Rightarrow \Delta \lambda=\dfrac{29800\times 0.67}{3\times 10^8}\\\Rightarrow \Delta\lambda=0.000066553\ m=0.0066553\ cm

The change in wavelength is 0.0066553 cm

You might be interested in
A current of 3.6-A flows through a conductor. Calculate how much charge passed through and cross-section of the conductor in 25s
Anastaziya [24]

Answer:

90 C

Explanation:

Electric current: This can be defined as the rate of flow of electric charge in a circuit. This can be expressed mathematically as,

I = dQ/dt

dQ = Idt

∫dQ = ∫Idt

Q = It................................ Equation 1

Where Q = amount of charge, I = current, t = time.

Given: I = 3.6 A, t = 25 s.

Substituting into equation 1,

Q = 3.6(25)

Q = 90 C.

Hence the amount of charge passing through the cross section of the conductor = 90 C

6 0
3 years ago
What is the correct definition of nurture?
makkiz [27]

Answer:

(C) the fulfillment of physical, mental, emotional, and social needs

Explanation:

Nurture

Definition (A) - <u><em>Care for and encourage the growth or development of</em></u>

Definition (B) - <u><em>The process of caring for and encouraging the growth or development of someone or something</em></u>

The best definition in the answer list for the word "nurture" is answer (C) The fulfillment of physical, mental, emotional, and social needs

8 0
3 years ago
Read 2 more answers
How to find the gradient of a velocity time graph
Sidana [21]
The area-

The area under the line in a velocity-time graph represents the distance travelled. To find the distance travelled in the graph above, we need to find the area of the light-blue triangle and the dark-blue rectangle.

<span><span>Area of light-blue triangle -
<span>The width of the triangle is 4 seconds and the height is 8 meters per second. To find the area, you use the equation: <span>area of triangle = 1⁄2 × base × height </span><span>so the area of the light-blue triangle is 1⁄2 × 8 × 4 = 16m. </span></span></span><span> Area of dark-blue rectangle The width of the rectangle is 6 seconds and the height is 8 meters per second. So the area is 8 × 6 = 48m.</span><span> Area under the whole graph <span>The area of the light-blue triangle plus the area of the dark-blue rectangle is:16 + 48 = 64m.<span>This is the total area under the distance-time graph. This area represents the distance covered.</span></span></span></span>
7 0
3 years ago
If you push a crate across a factory floor at constant speed in a constant direction, what is the magnitude of the force of fric
poizon [28]

Answer:

The magnitude of the force of friction equals the magnitude of my push

Explanation:

Since the crate moves at a constant speed, there is no net acceleration and thus, my push is balanced by the frictional force on the crate. So, the magnitude of the force of friction equals the magnitude of my push.

Let F = push and f = frictional force and f' = net force

F - f = f' since the crate moves at constant speed, acceleration is zero and thus f' = ma = m (0) = 0

So, F - f = 0

Thus, F = f

So, the magnitude of the force of friction equals the magnitude of my push.

3 0
2 years ago
Which electromagnet will produce the strongest magnetic force? (1 point)
Contact [7]

Answer:

Y

Explanation:

Y will produce the strongest magnetic force because the current intensity is medium and it has 50 turns in the wire. the number of turns will increase the force because the magnetic field will be more concentrated.

Have a great day :)

7 0
3 years ago
Read 2 more answers
Other questions:
  • The position of a particle moving along a coordinate line is s equals StartRoot 76 plus 6 t EndRoot​, with s in meters and t in
    12·1 answer
  • Explain the advantages and disadvantages of using concentric circles in describing the solar system to an elementary school chil
    9·1 answer
  • What was the significant change that Glenn Seaborg made to Mendeleev’s periodic table?
    11·1 answer
  • Please someone help me plz I don’t understand 1 or 2 plz help me plz plz plz
    10·1 answer
  • Two wires have the same resistance and radius. If the wires are made of copper and platinum with resistivities respectively of 1
    15·1 answer
  • This is the name given to organizations who attempt to affect the political process by informing and influencing members the gov
    14·2 answers
  • Which of the following represents a case in which you are not accelerating? -Driving 60 miles per hour around a curve -Going fro
    15·1 answer
  • A 125kg man buy a 6kg watermelon, a 3kg cantaloupe, and 6kgs of potatoes, he walks home with his purchases in a large bag. His w
    12·1 answer
  • HELP ME PLEASE
    13·2 answers
  • a is any object that is launched into the air with an initial velocity and moves in the air only ander the influence of gravity
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!