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
Arturiano [62]
3 years ago
12

WHEN IN FRICTION not useful

Chemistry
1 answer:
Paladinen [302]3 years ago
6 0
Friction is not useful in Machinery sometimes, Since it leads to the wear and tear of machine parts.
You might be interested in
Calculate the change in pH for each buffer upon the addition of 1.0 mL of 1.00MHCl. Express your answers using two decimal place
VikaD [51]
1.9 mL. en r t tu y y y
6 0
4 years ago
What is one way to separate a mixture?
Dmitry_Shevchenko [17]
1. <span>Substances in a </span>mixture<span> can be separated using different </span>methods, for example <span>distillation (separation of two liquids).
2. </span>Mass<span> is the amount of matter an object contains.
</span>Volume is t<span>he amount of space occupied by a three-dimensional object.
3. d(wallet) = 15g</span>÷5cm³ = 3g/cm³.
4. Weight of an astronaut also increases. W=m·g.
7 0
3 years ago
A 13.5 g sample of an unknown gas occupies 5.10 L at 149.83 kPa and 301 K. What is the molar mass of the gas ?
alisha [4.7K]

Answer:

The molar mass of the gas is 44.19 g/mol

Explanation:

Amount of sample of gas = m = 13.5 g

Volume occupied by the gas = V = 5.10 L

Pressure of the gas = P = 149.83 KPa

1 KPa = 0.00986 atm

P = 149.83 \textrm{ KPa} \times 0.00986 \textrm{ atm/KPa} = 1.48 \textrm{ atm}

Assuming M g/mol to be the molar mass of the gas

Assuming the gas is behaving as an ideal gas

\textrm{PV} =\textrm{nRT} \\\textrm{PV} = \displaystyle \frac{m}{M}\textrm{ RT } \\1.48 \textrm{ atm}\times 5.10 \textrm{ L} = \displaystyle \frac{13.5 \textrm{ g}}{M}\times 0.0821 \textrm{ L.atm.mol}^{-1}.K^{-1}\times 301\textrm{K} \\M = 44.19 \textrm{ g/mol}

The molar mass of gas is 44.19 g/mol

7 0
4 years ago
What are the first and second most abundant element in the universe?
UNO [17]
The answer to this is Hydrogen. <span />
3 0
4 years ago
Your aunt is sipping on iced tea and fanning herself during a hot South Carolina summer day. You tell her that there is enough e
tiny-mole [99]

Answer:

This is like having enough energy to supply the world for centuries with just 1% of the sea's force? The amount of energy in it can supply energy therefore the one drop of tea is able to run her air conditioning for the rest of her life.

Explanation:

3 0
3 years ago
Other questions:
  • True or False: As the ball rises from point 1 to point 3, it slows down
    10·1 answer
  • How does the number of products in a synthesis reaction compare with the number of reactants?
    5·2 answers
  • Which of the following happens when chlorine forms an ion?
    10·2 answers
  • A 25.00 mL sample containing an unknown amount of Al3+ and Pb2+ required 17.14 mL of 0.04907 M EDTA to reach the end point. A 50
    11·1 answer
  • Match each subscript symbol to its correct meaning. <br> Gas b. Liquid c. Aqueous solution
    13·2 answers
  • Which substance is electrically charged?
    12·1 answer
  • How many atoms below?
    12·1 answer
  • A chemist adds of a M sodium nitrate solution to a reaction flask. Calculate the millimoles of sodium nitrate the chemist has ad
    15·1 answer
  • What is a chemical change?
    11·1 answer
  • How many atoms are there in 38 g of iron(Fe) please help
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!