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
allsm [11]
4 years ago
9

Given the law of conservation of energy, what happens when a 200°C iron bar is placed in thermal contact with a 30°C block of wo

od?
O A
Energy leaves the iron bar and enters the wood until the temperatures are equal,
OB
Energy leaves the wood and enters the iron bar until the temperatures are equal.
O
C.
All the energy from the iron bar is transferred to the wood.
O
D.
All the energy from the wood is transferred to the iron bar.
Chemistry
1 answer:
kozerog [31]4 years ago
7 0

Answer:

The correct answer is A Energy leaves the iron bar and enters the wood until the temperature are equal.

Explanation:

According to the law of conservation of energy or the first law thermodynamics energy neither be created nor destroyed, energy is transferred from one form to another form.

        Here iron bar is placed in wood block energy is transferred from iron bar to wood until the temperatures are equal.

You might be interested in
What is the second most abundant element in stars? A. helium B. iron C. hydrogen D. oxygen
devlian [24]
<span>The </span>abundance of a chemical element<span> is a measure of the </span>occurrence<span> of the </span>element<span> relative to all other elements in a given environment. Abundance is measured in one of three ways: by the </span>mass-fraction<span> (the same as weight fraction); by the </span>mole-fraction<span> (fraction of atoms by numerical count, or sometimes fraction of molecules in gases); or by the </span>volume-fraction<span>. Volume-fraction is a common abundance measure in mixed gases such as planetary atmospheres, and is similar in value to molecular mole-fraction for gas mixtures at relatively low densities and pressures, and </span>ideal gas<span> mixtures. Most abundance values in this article are given as mass-fractions.

</span>
8 0
3 years ago
Which invention has done the most to help predict weather and warn people of approaching storms?
MariettaO [177]
The wind vane, the rain gauge, the anemometer, the barometer, and the thermometer.
3 0
4 years ago
Are assorted jelly beans heterogeneous or homogeneous
Scilla [17]

Heterogeneous, which means that they are not evenly combined.

5 0
3 years ago
A 2.10g of unknown monoprotic acid is titrated with 38.10 mL of .265M NaOH. Calculate the molar mass of the ac? I already calcul
Shkiper50 [21]
V_{NaOH}=38,1mL=0,0381L\\&#10;C_{m}=0,265M\\\\&#10;n=C_{m}*V=0,265\frac{mol}{L}*0,0381L\approx0,0101mol

HR    +      NaOH ⇒ NaR + H₂O
1mol   :     1mol

0,0101mol \ \ \ \ \Rightarrow \ \ \  \ 2,1g\\&#10;1mol  \ \ \ \ \ \ \ \ \ \ \Rightarrow \ \ \ m\\\\&#10;m=\frac{1mol*2,1g}{0,0101mol}\approx 207,92g\\\\&#10;M_{HR}=207,92\frac{g}{mol}
5 0
3 years ago
How many grams of carbon (C) would be present in carbon monoxide (CO) that contains 2.666 grams of oxygen (O)? For example if th
oee [108]

Given :

Mass of oxygen containing carbon monoxide (CO) is 2.666 gram .

To Find :

How many grams of carbon (C) would be present in carbon monoxide (CO) that contains 2.666 grams of oxygen (O) .

Solution :

By law of constant composition , a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

So , volume of solution does not matter .

Moles of oxygen , n=\dfrac{2.666}{16}=0.167\ mole .

Now , molecule of CO contains 1 mole of C .

So , moles of C is also 0.167 mole .

Mass of carbon , m=12\times 0.167=2\ g .

Therefore , mass of carbon is 2 grams .

Hence , this is the required solution .

5 0
3 years ago
Other questions:
  • The metals in Groups 1A, 2A, and 3A ____.
    11·1 answer
  • How many grams of sodium hyrdioxde are in 251.0ml f 0.600m
    5·1 answer
  • How many unpaired electrons would you expect on iron in iron ii sulfide. enter an integer?
    14·2 answers
  • What’s the answer???
    12·1 answer
  • How to make 0.01 Molar solution in 30 ml of water
    11·1 answer
  • What is the answer?? I need help
    12·1 answer
  • A. What type of elements are found in each group?
    11·1 answer
  • How many significant figures are in 0.00102?
    5·2 answers
  • Calcium carbonate and copper sulfate are each mixed into a beaker of water.
    13·1 answer
  • (iii) Calculate the volume of carbon dioxide at room temperature
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!