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
TiliK225 [7]
3 years ago
11

How long does it take for light from a star that is 8 light-years away to reach earth? A. 8 earth minutes B. 16 earth minutes C.

8 earth years D. 16 earth years
Physics
2 answers:
RUDIKE [14]3 years ago
6 0
Your answer would be:

C.) 8 Earth years.

Hope this helps (:!
Hunter-Best [27]3 years ago
4 0
Hey there,

Your question states: <span>How long does it take for light from a star that is 8 light-years away to reach earth?

It take just about (</span>8 earth years) <span> for light from a star that is 8 light-years away to reach earth. That is how </span>FAST it would take.

Hope this helps.
~Jurgen
You might be interested in
A body moves in a straight line. At time, it's acceleration is given by a = 12t + 1. When t =0, the velocity of the body v is 2
madreJ [45]

Answer:

v = 6t² + t + 2, s = 2t³ + ½ t² + 2t

59 m/s, 64.5 m

Explanation:

a = 12t + 1

v = ∫ a dt

v = 6t² + t + C

At t = 0, v = 2.

2 = 6(0)² + (0) + C

2 = C

Therefore, v = 6t² + t + 2.

s = ∫ v dt

s = 2t³ + ½ t² + 2t + C

At t = 0, s = 0.

0 = 2(0)³ + ½ (0)² + 2(0) + C

0 = C

Therefore, s = 2t³ + ½ t² + 2t.

At t = 3:

v = 6(3)² + (3) + 2 = 59

s = 2(3)³ + ½ (3)² + 2(3) = 64.5

5 0
3 years ago
When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a wavelength of ________ nm is emitted?
Oduvanchick [21]
First we find the energy level with the following formula, where a is the energy level, n1 is the final energy level, n2 is the starting energy level and r is Rydberg's constant in Joules
a = r \times ( \frac{1}{n1}  -  \frac{1}{n2} )
We insert the values

a = 2.18 \times  {10}^{ - 18}  \times ( \frac{1}{ {1}^{2} } -  \frac{1}{ {6}^{2} }  )
= 2.12 \times {10}^{ - 18}
The wavelength is found with this formula, where h is Planck's constant and c is the speed of light
wavelength =  \frac{h \times c}{a}
Finally we insert the values
\frac{6.626 \times  {10}^{ - 34}  \times 3 \times  {10}^{8} }{2.12 \times  {10}^{ - 18} }  = 9.376 \times  {10}^{ - 8}
Which is the same as 93.8 nm
3 0
3 years ago
Does the gas have a well defined structure
dem82 [27]

What gas? Gas is an invisible form so I don't see how it would have a "defined structure".

6 0
3 years ago
Read 2 more answers
What is the force of gravity for a 12 kg turkey?<br><br> Please help asap
pogonyaev

Answer: 117.6N

Explanation:

By the second Newton's law, we know that:

F = m*a

F = force

m = mass

a = acceleration

We know that in the surface of the Earth, the gravitational acceleration is g = 9.8m/s^2.

Then we just can input that acceleration in the above equation, and also replace m by 12kg, and find that the force due the gravity is:

F = 12kg*9.8m/s^2 = 117.6N

7 0
3 years ago
How much work is done by 0.070 m3 of gas, when the volume remains constant with pressure of 63 x 105 Pa?
stealth61 [152]

Answer:

W = 0 J

Explanation:

The amount of work done by gas at constant pressure is given by the following formula:

W = P\Delta V

where,

W = Work done by the gas

P = Pressure of the gas

ΔV = Change in the volume of the gas

Since the volume of the gas is constant. Therefore, there is no change in the volume of the gas:

W = P(0\ m^3)\\

<u>W = 0 J</u>

5 0
3 years ago
Other questions:
  • 10. A worker uses a pulley system to raise a 24.0 kg carton 16.5 m. A force of 129 N is exerted and the rope is pulled 33.0 m. a
    8·1 answer
  • A force that results from charged particles is called?
    14·2 answers
  • Two rockets are flying in the same direction and are side by side at the instant their retrorockets fire. Rocket A has an initia
    14·1 answer
  • This is a diagram of the ear.
    15·1 answer
  • A battery is connected to a small torch bulb so that a current flows. The traditional direction of the flow of current and the f
    5·2 answers
  • What is the change in the cell voltage when the ion concentrations in the cathode half-cell are increased by a factor of 10?
    7·2 answers
  • Two billiard balls with the same mass m move towards one another. Ball one travels in the positive x-direction with a speed of v
    10·1 answer
  • (c) The ball leaves the tennis player's racket at a speed of 50 m/s and travels a
    7·1 answer
  • Lauren pushed a book off the edge of a table. Which energy change occurs as the book falls from the table?
    11·1 answer
  • Which three statements describe mechanical waves?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!