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
olchik [2.2K]
3 years ago
4

What can be observed only by observing its effects on gravity?

Chemistry
1 answer:
lesya [120]3 years ago
8 0
With out dark matter, the galaxy could not be held together. The velocities of stars is different in different parts of galaxy. Thus, dark matter can only be observed by observing its offers on galaxy
You might be interested in
What monatomic ions do selenium (z = 34) and phosphorus (z = 15) form? (type your answer using the format [cu]+ for cu+ and [cu]
Alex787 [66]
The answer:
for the monoatomic <span>selenium ions
</span>    -the ion charge of selenium is 2-, so the answer is [Se]2+ 
as for the monoatomic phosphorus ions
    -the ion charge of phosphorus is 3-, so the answer is [P]3- 
6 0
3 years ago
2. If a bacterium that normally lives in the gastrointestinal tract is
ioda

Answer:

D

Explanation:

6 0
4 years ago
What subatomic particle of the atom has no electric charge
amm1812
Neutrons have no electrical charge.
3 0
4 years ago
Consider the formation of the three solutionsshown in the table.
bazaltina [42]

Answer:

sorry please can you snap the diagram ...the question is not clear to my understanding

8 0
3 years ago
What two types of elements are ionic compounds made of?
mash [69]

Answer:

ionic compounds are made from metal and non mental elements

Explanation:

in this case it is know as an ionic compound because it contains a charge. For example, NaCl is simply a compound as it contains no charges (the charges cancel out as Cl is -1 and Na is +1)

but OH- is an ionic compound as it has a charge if -1 (O has a -2 charge and H has a +1 charge, so -2+1=-1 so OH has -1 charge)

8 0
3 years ago
Other questions:
  • Assuming you start with 10.0 g of zinc and 10.0 g hydrochloric acid, identify the limiting reagent and determine what mass of th
    5·1 answer
  • Which of the following is most likely to use coal<br> as fuel?<br> Stove<br> Airplane<br> Factory
    11·1 answer
  • Which factor is generally responsible for high melting points?
    10·2 answers
  • Please help fast!!! What does the weight of an object depend on?
    7·2 answers
  • Samira has two pens. She wants to know which pen was used to write a note. She labels her pens A and B. She puts a sample of ink
    5·1 answer
  • HELP PLEASEE
    12·1 answer
  • What are the conjugate base and conjugate acid for HSO4−? What is the term used to describe species that can behave as either an
    6·1 answer
  • Which element is a Nobal gas
    8·1 answer
  • 3. A student mixes a solid powder into a beaker of fluid. Which of the following would indicate that a chemical change has defin
    12·1 answer
  • Which characteristic of money explains why an old dollar is worth as much as a crisp, new dollar?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!