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
Nonamiya [84]
3 years ago
15

What do you think that astronomers mean when they use the term observable universe?

Physics
1 answer:
iren2701 [21]3 years ago
6 0
The observable universe consists of galaxies and other matter that can, principally, be seen from Earth because the light signals have had time to reach us. Not everything in the sky is the way it is when we see it, because of the distance the light travels to reach us. 

Hope this helps :)
You might be interested in
Define kinetic energy and derive its relation.
IRINA_888 [86]

Answer:

The kinetic energy of a body is the energy that it possessed due to its motion. Kinetic energy can be defined as the work needed to accelerate an object of a given mass from rest to its stated velocity. Kinetic energy depends upon the velocity and the mass of the body.

3 0
3 years ago
Heyyyy help ! <br><br> What’s the electromagnetic wave that has a wavelength between 1mm and 30cm
LenaWriter [7]

You've got some UHF radio waves at the long end of that range.  But most of the range consists of <em>microwaves</em>.

For example:  In the US, the "microwave oven" kitchen appliance cooks with radiation at a wavelength of about 12.2 cm .  

6 0
3 years ago
Which of the following describes the mass of an object precisely ? *
timurjin [86]

Answer:

2.345 would be the most precious because you have more numbers to work with and exact numbers

8 0
4 years ago
Which of the following statements best describes the function of the muscular system?
Korvikt [17]

Explanation:

A is excretion

B is digestion

so my guess is c

8 0
3 years ago
Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. (a) How fa
BartSMP [9]

Answer

given,

Echo time = t = 1000 s

speed = ?

v = \dfrac{d}{t}

a) speed of electromagnetic wave

c = \dfrac{d}{t}

wave travels Venus two time

c = \dfrac{2d}{t}

d = \dfrac{ct}{2}

d = \dfrac{3 \times 10^8\times 1000}{2}

d = 1.5 x 10¹¹ m

b) now, echo time

    c = \dfrac{2d}{t}

    t = \dfrac{2d}{c}

    t = \dfrac{2\times 75}{3 \times 10^8}

          t = 5 x 10⁻⁷ s

8 0
3 years ago
Other questions:
  • Sand is pouring out of a pipe and is forming a conical pile on the ground. The radius of the pile is increasing at a rate of 2 f
    7·1 answer
  • A bicycle travels 141 m along a circular track of radius 30 m. What is the angular displacement in radians of the bicycle from i
    5·1 answer
  • Which medium will light travel through slowest? <br> 1.Solid<br> 2.Gas<br> 3.Empty Space
    11·1 answer
  • Select the correct answer.
    8·2 answers
  • Circus a path along which electric current flows how would changing the battery in a circuit from 9 V to 1.5 V most likely affec
    14·2 answers
  • Someone help me please, I don't know how to do it :( ​
    5·1 answer
  • LAST ONE! ASAP PLEASE
    6·2 answers
  • What causes waves to slow down: change in wave’s wavelength or change in its frequency and y?
    10·1 answer
  • A different group is worried that the motion detector will not
    10·1 answer
  • Can someone please help me ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!