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
Lelu [443]
3 years ago
15

Some scientific evidence suggests that our universe is ever-expanding from a hot and dense initial state. Briefly describe at le

ast one piece of evidence that supports the theory known as the Big Bang.
Chemistry
2 answers:
Alex73 [517]3 years ago
8 0
Cosmic microwave background radiation (CMBR) is one piece of evidence for the big bang
Romashka [77]3 years ago
6 0

Answer:

<h2>Cosmic microwave background and Hubble's Law.</h2>

Explanation:

Microwave background is basically electromagnetic radiation, but it's the remanent from earlier periods of the universe, they are the oldest electromagnetic wave in the Universe. Also, Hubble's Law says that the Universe faster galaxies are those are further away, because they belong to the first period of the explosion.

You might be interested in
A piece of wood has a labeled length value of 63.2 cm. You measure its length three times and record the following data: 63.1 cm
Ulleksa [173]

Percent error (%)= \frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100

Accepted value is true value.

Measured values is calculated value.

In the question given Accepted value (true value) = 63.2 cm

Given Measured(calculated values) = 63.1 cm , 63.0 cm , 63.7 cm

1) Percent error (%) for first measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.1 cm

Percent error (%)= \frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100

Percent error = \frac{\left | 63.2 - 63.1 \right |}{63.2}\times 100

Percent error = \frac{0.1}{63.2}\times 100

Percent error = 0.00158\times 100

Percent error = 0.158 %

2) Percent error (%) for second measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.0 cm

Percent error (%)= \frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100

Percent error = \frac{\left | 63.2 - 63.0 \right |}{63.2}\times 100

Percent error = \frac{0.2}{63.2}\times 100

Percent error = 0.00316\times 100

Percent error = 0.316 %

3) Percent error (%) for third measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.7 cm

Percent error (%)= \frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100

Percent error = \frac{\left | 63.2 - 63.7 \right |}{63.2}\times 100

Percent error = \frac{\left | -0.5 \right |}{63.2}\times 100

Percent error = \frac{(0.5)}{63.2}\times 100

Percent error = 0.00791\times 100

Percent error = 0.791 %

Percent error for each measurement is :

63.1 cm = 0.158%

63.0 cm = 0.316%

63.7 cm = 0.791%




7 0
3 years ago
2HgO(s)----&gt;2Hg(I)+O2(g) which type of reaction occurs
kaheart [24]
Decomposition,because 1 breaks down into 2
8 0
3 years ago
Read 2 more answers
Fill in the blank. A ___ is a substance that cannot be separated into simpler substances by physical or mechanical methods such
Ganezh [65]
An element cannot be broken down any further. Elements can be found on the periodic table

8 0
3 years ago
Read 2 more answers
The main acid in the stomach is hydrochloric acid (HCl). Which chemical equations show a reaction that occurs when someone takes
777dan777 [17]
I think the correct answer would be HCl + NaHCO3 -> NaCl + H2O + CO2, 2HCl + CaCO3 -> CaCl2 + CO2 + H2O, 2HCl + Mg(OH)2 -> MgCl2 + 2H2O. Hydrochloic acid would react with the basic substances in the stomach which are magnesium hydroxide, sodium bicarbonate and <span>calcium carbonate.</span>
7 0
3 years ago
Read 2 more answers
CH3OH can be synthesized by the reaction:
Leviafan [203]

Answer:

5

Explanation:

8 0
3 years ago
Other questions:
  • A man walked back and forth in a straight line. if he travels from point A to point B, then turns around and stops at point C, w
    10·2 answers
  • A 155g sample of copper was heated to 150.0 degrees Celsius, then placed into 250.0g water at 19.8 degrees Celsius. Calculate th
    13·1 answer
  • Arrange the following types of photons of electromagnetic radiation in order of decreasing energy: red light, radio, x-rays, γ-r
    11·1 answer
  • Consider the reaction below.
    14·2 answers
  • Which element has this electron configuration? <br> astatine<br> bromine<br> chlorine<br> fluorine
    12·2 answers
  • The measure of the energy of motion of particles of matter
    15·1 answer
  • HELP ASAP PLZ!!!! Find the mass of each substance. Show your work.
    10·1 answer
  • Bromine (Br,) is observed as a red-brown color During the bromination of benzene, an electrophilic aromatic substitution, why do
    15·1 answer
  • Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about
    13·1 answer
  • After each step in a dichotomous key, the questions get ________.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!