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zvonat [6]
3 years ago
14

Name two things that reduce friction

Chemistry
2 answers:
coldgirl [10]3 years ago
7 0
Oil and a smooth surface
photoshop1234 [79]3 years ago
5 0
Two ways are: Make the surfaces smoother and Lubrication<span> </span>
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Gross Domestic Product includes consumption, net exports, _____, and _____. investments, government expenses intermediate goods,
miskamm [114]

Answer: The correct answer for the blank is-

Investments and government expenses.

Gross domestic product (GDP)  is the total goods and services value, which is produced within the boundary of a country during a particular year.

GDP is measured by expenditure method, which includes investment, government expenditure, net exports (Exports-Imports), and consumption.

Thus, investments and government expenses is the right answer for the blanks.

8 0
3 years ago
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What is the concentration of a stock solution if 20 mL was used to make 400 mL of a 1.44
timofeeve [1]

Given :

Volume of stock solution, V_s = 20\ mL.

Volume of diluted solution, V_d = 400 \ mL.

Molarity of diluted solution, M_d = 1.44\ M.

To Find :

The concentration of the stock solution.

Solution :

We know, dilution factor is given by :

D.F=\dfrac{V_ {diluted}}{V_{stock}}      ....1)

and D.F= \dfrac{M_{stock}}{M_{diluted}}     ....2)

Putting volume in above equation, we get :

D.F = 400/20

D.F = 20

Putting value of D.F in equation 2) we get :

\dfrac{M_{stock}}{M_{diluted}} = 20\\\\M_{stock} = 20\times 1.44\\\\M_{stock} =28.8\ M

The concentration of stock solution is nearest to 30 M.

Therefore, the correct option is 1) 30 M.

4 0
3 years ago
Can someone plz help me? :(
Semmy [17]

Answer:

The answer is C Hope this helps!

4 0
3 years ago
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How does the introduction of invasive species, such as the brown tree snake, upset the stability of an ecosystem?
adoni [48]
Think of the environmental food chain
4 0
3 years ago
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Explain why ice is able to float on water
agasfer [191]

Ice floats because it is about 9% less dense than liquid water. ... The heavier water displaces the lighter ice, so ice floats to the top. One consequence of this is that lakes and rivers freeze from top to bottom, allowing fish to survive even when the surface of a lake has frozen over

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4 years ago
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