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
Volgvan
3 years ago
10

A spaceship is headed toward Alpha Centauri at 0.999c. According to us, the distance to Alpha Centauri is about 4 light-years. H

ow far away is Alpha Centauri according to the travelers in the ship?
a) also about 4 light-years
b) very slightly more than 4 light-years
c) very slightly less than 4 light-years
d) quite a bit less than 4 light-years
e) quite a bit more than 4 light-years
Physics
1 answer:
aniked [119]3 years ago
4 0

Answer:

According to the travellers, Alpha Centauri is <em>c) very slightly less than 4 light-years</em>

<em></em>

Explanation:

For a stationary observer, Alpha Centauri is 4 light-years away but for an observer who is travelling close to the speed of light, Alpha Centauri is <em>very slightly less than 4 light-years. </em>The following expression explains why:

v = d / t

where

  • v is the speed of the spaceship
  • d is the distance
  • t is the time

Therefore,

d = v × t

d = (0.999 c)(4 light-years)

d = 3.996  light-years

This distance is<em> very slightly less than 4 light-years. </em>

You might be interested in
Which other element is most likely to be a nonreactive gas?
krok68 [10]

Answer:

A. Argon

Explanation:

It is a noble gas, a group which is not reactive.

5 0
3 years ago
FAST PLEASE What is the change in internal energy if 90 J of thermal energy is added to a
vladimir1956 [14]
A is right because I took the test
5 0
2 years ago
You drop a rock off a bridge. The rock's height, h (in feet above the water), after t seconds is modeled by h = – 16 t2 + 541. W
marin [14]
<span>h ( t) = h(1 sec) = -16t^2 + 541

so h (2 sec) = -16*(2)^2 + 541 = -64 + 541 = <span>477 ft

Therefore, </span></span>the height of the rock after 2 seconds is 477 feet.

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
5 0
3 years ago
W imieniu państwa napisz zaproszenie dla rodzeństwa na uroczystą kolacje
HACTEHA [7]

On behalf of the state, write an invitation for the siblings for the gala dinner


Hello there, we would like to welcome you to the gala dinner hope you can come :)

8 0
3 years ago
A student performs an activity to study how electric current flows in a circuit. The student constructs two different circuits,
natta225 [31]

Native_Americans_in_the_United_State0000000000000000000000000

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Need help with these
    11·2 answers
  • Last month, Sarah documented how her city suffered from acid rain. What type of pollution should the people in Sarah’s city try
    12·2 answers
  • Isotopes are atoms with identical numbers of __ and different numbers of __.
    11·1 answer
  • Which element would most likely form an lonic bond with nitrogen (N)?<br> 0<br> Р<br> c<br> к
    12·1 answer
  • Which refers to the change of pitch heard when the source of the sound approaches and then moves away from a stationary person?
    12·2 answers
  • Please refer to the picture
    14·1 answer
  • Bob ran at 5 m/s for 4 seconds and ended up at position 8 m. Where did he start
    11·1 answer
  • 9. Kokio dydžo Archimedo jėga veikia 0,5 m² tūrio medinį rastą vandenyje?​
    6·1 answer
  • Can someone solve it?
    13·1 answer
  • An a.c. supply is connected to a wire stretched between the poles of a magnet. Which way does the wire move?​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!