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
Eduardwww [97]
3 years ago
15

How can scientists know what happened millions of years ago if no one was there to see it?​

Chemistry
1 answer:
xxMikexx [17]3 years ago
4 0

Answer:

In the 150 years since Darwin proposed the theory of evolution by natural selection, a mountain of evidence has accumulated ... How can you know what happened millions of years ago if no one was there to see it? Evidence and observation are the building blocks of all scientific inquiry; evolutionary science is no different

Explanation:

You might be interested in
1.
astraxan [27]
1) electric energy

2) toaster

3) music heard from a radio
7 0
3 years ago
Read 2 more answers
The ___ fluid compartment consists of fluid contained within all cells in the body and contains 2/3 of the body water in healthy
photoshop1234 [79]

Answer:

intracellular; extracellular

Explanation:

Intracellular fluid compartment is system which includes all the fluid which is enclosed in the cells by the plasma membranes of these cells. It lies in the cells and acts as the principal component of cytoplasm. ICF makes up about 2/3 of total water in human body.

Extracellular fluid is system which surrounds all the cells in body. The fluid has two primary constituents which are - fluid component of blood (known as plasma) and interstitial fluid (IF) which surrounds all the cells except blood. It accounts for other 1/3 of water content of the body.

6 0
3 years ago
The ksp of pbi2 is 1.4 x 10-8. what is the molar solubility of lead(ii iodide in a solution of 0.400 m sodium iodide?
tino4ka555 [31]
The solubility product of a substance us calculated by the product of the concentration of the dissociated ions in the solution raise to the stoichiometric coefficient of the ions. Therefore, we need the dissociation reaction. For this, it will have the reaction:

PbI2 = Pb^2+ + 2I-

We solve as follows:

Ksp = [Pb2+][I-]^2 = <span>1.4 x 10-8
</span><span>1.4 x 10-8 = x(2x)^2
</span><span>1.4 x 10-8 = 4x^3
x = 1.5x10^-3 M

The molar solubility would be </span>1.5x10^-3 M.
8 0
3 years ago
Solve as soon as possible with detailed step by step explanation ​
scoundrel [369]
Mr. Jones's prescription calls for 1.04 tablets per day. Based on this information, how many tablets should Mr. Jones take per day? a) 1.25 O b) 1.5 c) 1 O d) 2
8 0
2 years ago
When the pH of a solution is 12.83, what is [H +]?
inn [45]

Answer:

B.9.710-11M

Explanation:

<h3>plss tell me if im wrong</h3>

4 0
3 years ago
Other questions:
  • The graph above shows the progress of a chemical reaction. Based on the graph, which of the following is true?
    11·2 answers
  • True or False: The digestive system is really just a long tube that turns into a bunch of organs and ends with the large intesti
    7·1 answer
  • How to i tell my straight (i think) friend I'm in Io\/e with her?
    6·2 answers
  • A student is investigating the transfer of energy between potential and kinetic. The student observes a roller coaster at four l
    7·2 answers
  • Jewelry and tableware are sometimes made of sterling silver. Sterling silver is 92.5% silver (Ag) and 7.5% copper (Cu). If you w
    11·1 answer
  • A metal atom and a non-metal atom bond together. What type of bond do they form?
    8·1 answer
  • . Now Sara comes along, and she is the exact same size as you. However, she is even stronger than you are! When she pulls you in
    5·1 answer
  • A serving of Frosted Flakes cereal contains 235,000 J of energy. Calculate the change in temperature (ΔT) that would occur if th
    15·1 answer
  • 20 POINTS!!<br> Kinetic and Potential Energy
    13·2 answers
  • All simple metal with acid reactions are ____ displacement reactions.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!