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
masha68 [24]
3 years ago
9

Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?

Chemistry
2 answers:
velikii [3]3 years ago
8 0
It’s c galaxy ((: so yeah
torisob [31]3 years ago
3 0
The answer would be C. Galaxy.
You might be interested in
If I have 2.4g of magnesium, how many g of oxygen(O2 ) will I need to react completely with the magnesium? 2Mg +O2 → MgO
Jet001 [13]

Explanation:

just trying....hope that helps

5 0
3 years ago
A Series of choices between two characteristics that is used to identify an organism is called a
Zielflug [23.3K]

Answer: Dichotomous

Using a Dichotomous Key to Identify Organisms

A dichotomous key is a tool used by biologists to identify organisms in a group through a process of answering yes or no questions about the organism. Dichotomous means 'divided into two parts', as each question about an organism has two choices.

8 0
3 years ago
What can lead to being curious and also lead to fascinating scientific investigations? a. Questions b. Answers c. Qualitative Me
Ira Lisetskai [31]

Answer:

Questions

Explanation:

The word "science" was obtained from the Latin word "Scire" which means "to know". Hence science is a systematic investigation into the nature of the universe.

Scientific investigations begin with asking questions about the universe. It is this curiosity to know about occurrences in the universe as well as how to solve problems in the universe that leads to fascinating scientific investigations and discoveries.

8 0
3 years ago
Natalia dipped two feathers in oil. Then she dipped one feather in cold water and the other feather in hot water. She swirled bo
Alika [10]

Answer:

The hot water was better for removing the oil.

Explanation:

You can see that because the mass went down more with the hot water. So, that means that more oil was taken out of the feather with hot water.

8 0
2 years ago
under certain water​ conditions, the free chlorine​ (hypochlorous acid,​ hocl) in a swimming pool decomposes according to the la
ivolga24 [154]

Answer:

1.7 ppm

Explanation:

Original amount N' = 2.6 ppm

time to testing t = 24 hr

final amount N = 2.1 ppm

Using exponential inhibited decay, we have

N = N'e^(-kt)

Where

N is the new reading

N' is the original reading

t is the decay time

k is the decay constant

Substituting, we have

2.1 = 2.6 x e^(-k x 24)

2.1 = 2.6 x e^(-24k)

0.808 = e^(-24k)

We take the natural log of both sides of the equation

Ln 0.808 = Ln (e^(-24k))

-0.213 = - 24k

K = 0.213/24 = 0.00886

After 48 hrs, the reading of free chlorine will be

N = 2.6 x e^(-0.00886 x 48)

N = 2.6 x e^(-0.425)

N = 2.6 x 0.654

N = 1.7 ppm

5 0
3 years ago
Other questions:
  • Can you place the following elements in order of decreasing atomic size: selenium, chlorine, fluorine, rubidium, calcium, and su
    14·2 answers
  • I need to know the answers
    13·1 answer
  • What is the relationship between mass and weight?
    14·1 answer
  • Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-m
    11·1 answer
  • Why do the particles in a colloid stay suspended in a liquid, while the particles in a suspension settle out?
    9·1 answer
  • Gaseous C2H4 reacts with O2 according to the following equation:
    13·2 answers
  • Based on charles’s law, which of the following statements is true for an ideal has at a constant pressure and mole amount?
    8·1 answer
  • See if you can think of a way to prove that it is the oxygen in air, not nitrogen, that causes rusting.
    14·1 answer
  • How many zeroes are significant in the measurement 0.0400200?
    7·2 answers
  • How is hydrogen an example of an element?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!