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
SashulF [63]
3 years ago
8

I need an answer ASAP

Chemistry
1 answer:
Oduvanchick [21]3 years ago
8 0

Time taken for star to reach Earth = 7.5 years

<h3>Further explanation</h3>

Given

7.5 light years(distance Earth-star)

Required

Time taken

Solution

Speed of light=v = 3 x 10⁸ m/s

1 light years = 9.461 × 10¹⁵ m= distance(d)

So time taken for 1 light years :

time(t) = distance(d) : speed(v)

t = 9.461 × 10¹⁵ m : 3 x 10⁸ m/s

t = 3.154 x 10⁷ s = 1 years

So for 7.5 light years, time taken = 7.5 years

You might be interested in
What is in an inorganic molecule?
valentinak56 [21]
Inorganic molecules are composed of other elements. They can contain hydrogen or carbon, but if they have both, they are organic.
6 0
3 years ago
What is the volume of the rock in the image in mL
Yuri [45]

Answer:

Initial volume: mL

Final volume: mL

Volume of rock: cm3

5 0
3 years ago
PLEASE HELP PICTURE BELOW
seraphim [82]

Answer:

A.      

sorry if  it's wrong

Explanation:

8 0
2 years ago
Which factor has the least effect on the rate of solution of a solid in a liquid?
vitfil [10]
The pressure will not affect the rate of solution.
4 0
2 years ago
Read 2 more answers
Which sequence of events is required to form a limestone cave where you can walk around and observe cave formations, such as sta
N76 [4]

Answer:

Which sequence of events is required to form a limestone cave where you can walk around and observe cave formations, such as stalactites? (Note: stalactites hang from the ceiling - they have to hold on tight to the roof.)

A geological sequence of events as involving the lowering of the water table to expose cave structures where stalactites and stalagmites form which is described as follows,

Explanation:

1. Acidic percolated water formed cavities of solution beneath the natural water table known as phreatic zone

2. After the passage of time there is a drop in the water table dropped forming caves from cavities

3. These caves, which are air filled voids that contains adequate environment for forming stalactites and stalagmites and where they are found

5 0
3 years ago
Other questions:
  • Why is carbon the basis for the many different kinds of organic molecules? Select all that apply. A. It can connect with several
    5·1 answer
  • Why nucleus is stable?
    12·2 answers
  • What is the mass in pounds of 1.000 quart of mercury
    15·1 answer
  • Express the following in
    5·1 answer
  • Which of the following is the largest contributor to the salt ions in the ocean?Select one of the options below as your answer:
    11·1 answer
  • Estructura 7.2 completar repaso 1 - ¿lógico o ilógico? 1 - ¿lógico o ilógico? listen and indicate whether each question and resp
    5·1 answer
  • I) If 8.87g of As2O3 is used in the reaction and 5.33 g of As is produced, what is the percent
    14·1 answer
  • A chemist must dilute 61.9 mL of 548. nM aqueous sodium carbonate (Na2CO3) solution until the concentration falls to 484. nM . H
    12·1 answer
  • I'd really appreciate help- this is due in around 8 hours :"D
    5·1 answer
  • How many atoms in:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!