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
Ulleksa [173]
3 years ago
13

A spaceship from a friendly, extragalactic planet flies toward Earth at 0.203 0.203 times the speed of light and shines a powerf

ul laser beam toward Earth to signal its approach. The emitted wavelength of the laser light is 691 nm . 691 nm. Find the light's observed wavelength on Earth.

Physics
2 answers:
Serjik [45]3 years ago
7 0

Answer:

567.321nm

Explanation:

See attached handwritten document for more details

Rudik [331]3 years ago
7 0

Answer:

The observed wavelenght on earth will be 5.51x10^-7 m

Explanation:

Speed of light c = 3x10^8 m/s

Ship speed u = 0.203 x 3x10^8 = 60900000 = 6.09x10^7 m/s

Wavelenght of laser w = 691x10^-9 m

Observed wavelenght w' = w(1 - u/c)

u/c = 0.203

w' = 691x10^-9(1 - 0.203)

w' = 5.51x10^-7 m

You might be interested in
[C]utting programs that were not effective or essential and even some that were, but are now unaffordable; and precisely targeti
zalisa [80]

Option B i.e discretion is the right and correct answer.

[C]utting programs that were not effective or essential and even some that were, but are now unaffordable; and precisely targeting our investments. Every department will feel the impact of these reductions as they cut programs or tighten their belts to free up more resources for areas critical to economic growth. —President Barack Obama, 2012 Budget Message of the President.

The President above clearly refers to the Discretion Spending where portion of the budget is decided by Congress through the annual appropriations.

3 0
3 years ago
Read 2 more answers
Select the correct answers.
diamong [38]

Answer:

decreases, increases, minimum (zero)

Explanation:

Kinetic energy of a body is directly proportional to the square of velocity of the body and the potential energy is directly proportional to the height  of the body at which it is placed.

The formula for the kinetic energy is

K = 1/2 m v^2

The formula for the potential energy is

U = m g  h

As the body goes up its kinetic energy decreases as the velocity of the object decreases.

As the body goes up the potential energy increases as the height increases.

At the top most point, the velocity of teh object is zero, so the kinetic energy at the top is zero.

8 0
4 years ago
Read 2 more answers
A bird experiences an acceleration of -1.80m/s^2 for 3.81s, and ends up 26.5m to the left of its starting point. What is it's fi
Ronch [10]
For your reference.For your reference.

5 0
3 years ago
What is the kinetic energy of a cat running 5 m/s
dusya [7]

The cat's kinetic energy is

                   (1/2) x (the cat's mass in kg) x (25 m²/sec²).

The unit is [joules] .

4 0
3 years ago
What resistance would produce a current of 120 amps from a 6-volt battery?
Verdich [7]
It would be 8 so that would be you answer
8 0
3 years ago
Other questions:
  • What statements accurately describe sunspots? Check all that apply.
    12·1 answer
  • What is the metric unit of weight? Gram/pound/Newton/milliliter
    5·1 answer
  • In terms of substances explain why evaporation of water is a physical change and not a chemical change
    7·1 answer
  • Based on its location in the periodic table, we know that ALL BUT one property applies to the element radon. Which property does
    5·2 answers
  • Does the universe ever stop ?
    11·2 answers
  • Horizontal circular motion questions:
    8·1 answer
  • Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to one-third its original v
    13·1 answer
  • You can fill a bucket from a downstairs tap quicker than upstairs tap.why?
    9·1 answer
  • Label the parts and include the measurements.
    8·1 answer
  • This graph shows how the reaction rate of a chemical reaction changed as concentration of reactant changed. Which sentence best
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!