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
julsineya [31]
3 years ago
12

Machines are never 100 percent efficient because some work is used to overcome friction and inertia. True False

Chemistry
2 answers:
ElenaW [278]3 years ago
7 0
False,
machines constantly mess up
Y_Kistochka [10]3 years ago
3 0
This is wrong because machines can make mistakes that why we fix it
You might be interested in
3. A 31.2-g piece of silver (s = 0.237 J/(g · °C)), initially at 277.2°C, is added to 185.8 g of a liquid, initially at 24.4°C,
VARVARA [1.3K]

Answer:

Cp_{liquid}=2.54\frac{J}{g\°C}

Explanation:

Hello,

In this case, since silver is initially hot as it cools down, the heat it loses is gained by the liquid, which can be thermodynamically represented by:

Q_{Ag}=-Q_{liquid}

That in terms of the heat capacities, masses and temperature changes turns out:

m_{Ag}Cp_{Ag}(T_2-T_{Ag})=-m_{liquid}Cp_{liquid}(T_2-T_{liquid})

Since no phase change is happening. Thus, solving for the heat capacity of the liquid we obtain:

Cp_{liquid}=\frac{m_{Ag}Cp_{Ag}(T_2-T_{Ag})}{-m_{liquid}(T_2-T_{liquid})} \\\\Cp_{liquid}=\frac{31.2g*0.237\frac{J}{g\°C}*(28.3-227.2)\°C}{185.8g*(28.3-24.4)\°C}\\ \\Cp_{liquid}=2.54\frac{J}{g\°C}

Best regards.

6 0
3 years ago
Which of the following best describes where cellular respiration occurs?
Illusion [34]

Answer:

In every body cell

Explanation:

4 0
3 years ago
Read 2 more answers
The number of nitrogen atoms in one mole of nitrogen gas are...
9966 [12]

Explanation:

The number of nitrogen atoms in one mole of nitrogen gas are <em><u>6.02214179×1023 nitrogen </u></em><em><u>atoms</u></em><em><u>.</u></em><em><u> </u></em>

<em>Hope this helps... </em>

3 0
2 years ago
What is the density of an 800 gram object that occupies 200 cm 3 ?
vova2212 [387]
Density = mass/volume = 800/200 =4 g/cm^3
8 0
2 years ago
Convert from 300 calories to calories (kicalories)? <br> Please help mee
Alex777 [14]

Answer:

0.3 kicalories

Explanation:

300/1000

=0.3

PLS GIVE BRAINLIEST

4 0
2 years ago
Read 2 more answers
Other questions:
  • Rocks formed by changes in heat and pressure or the presence of hot, watery fluids
    7·2 answers
  • How many molecules are in 2.570 moles of H2
    10·2 answers
  • The atomic mass of titanium is 47.88 atomic mass units. This atomic mass represents the
    5·1 answer
  • The biopsychosocial perspective, compared with the perspectives of Freud, Jung, and Rogers, __________.
    6·1 answer
  • Liquid nitrogen is cold and can be used to cool objects to -196°C. If you put the bottle of warm air in liquid nitrogen at this
    7·1 answer
  • Magnesium and nitrogen react to form magnesium nitrate. Which of the following expressions represents this chemical reaction?
    6·1 answer
  • Why do chemical equations need to be balanced?
    11·1 answer
  • Sooo who wanna be friends?
    13·2 answers
  • Al(s) + NiSO4(aq)<br> Balance
    8·1 answer
  • True/False Chemistry
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!