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
Sindrei [870]
3 years ago
15

1. How much heat is absorbed by a 50g iron skillet when its temperature rises from 10oC to 124oC? Joules

Mathematics
1 answer:
hoa [83]3 years ago
7 0
<span>1. How much heat is absorbed by a 50g iron skillet when its temperature rises from 10oC to 124oC? Joules

Formula: Heat = mass * specific heat * ΔT

Data:
mass = 50 g = 0.050 kg
specific heat of iron = 450 J/ kg °C
ΔT = 124°C - 10°C ¿ 114 °C

=> heat = 0.050kg * 450 J / kg°C * 114°C ≈ 2.6 J

2. If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 492J of energy to the room? Joules

The firs law of thermodynamics is conservation of energy => energy removed from inside of the refrigerator = energy released to the room

=> Answer = 492 J

3. How much heat is needed to raise the temperature of 45g of water by 63oC? Joules

Formula: heat = mass * specific heat * ΔT

specific heat of water = 4186 J / Kg °C

heat = 0.045 kg * 4186 J/kg °C * 63°C = 11,867.31 J
</span>
You might be interested in
Help! Find the answers pleaseeeeee
OleMash [197]

Answer:

Step-by-step explanation:

area of rectangle=20×11=220 sq. cm.

area  of circle=π×4²=16π≈50.27 sq.cm

area of remaining rectangle=220-50.27≈169.73 sq.cm.

4 0
3 years ago
Read 2 more answers
Which is not an agency under the direction of the Department of Homeland Security?
fredd [130]
The Federal Bureau of Investigation is not an agency under the direction of the Department of Homeland Security. The correct option among all the options that are given in the question is the third option or option "c". FBI is actually the domestic intelligence and security agency. I hope the answer comes to your help.
4 0
3 years ago
Read 2 more answers
Need help with this question
gulaghasi [49]

Answer:

bc=-4

Step-by-step explanation:

4x -1 is -4. because your adding a negative and a positive

8 0
3 years ago
Read 2 more answers
The average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction wo
Talja [164]

The statement his friend’s statement  is not accurate. The percent increase will be more than 2% is correct.

We have the average hourly earnings for a construction worker is projected to be $24.50 in 2012. jason wants to join the construction work force after he graduates in 2012. his friend tells him that average hourly earnings for construction workers will rise by 2% from 2009 to 2012.

<h3>What is the meaning of avarage?</h3>

An average value is defined as the sum of all the values divided by the total number of values in a given data.

Therefore we get,have ion industry  average hourly earnings, 2000-2009 a line graph titled construction industry, average hourly earnings (dollars), 2000 to 2009,

where the x-axis shows years and the y-axis shows average hourly earnings of production workers.

line starts at 17.2 on january 2000, slowly increases to 19.7 on january 2006, then increases more quickly to 20.5 on january 2007 and 22.4 on january 2009

<h3>What is the meaning of increasing 2%?</h3>

The percent increase between two values is the difference between a final value and an initial value, expressed as a percentage of the initial value.

Therefore from the given data line starts

17.2 on january 2006

20.5 on janury 2007

22.4 on janury 2009

It seems that The option B is correct.

Therefore,his friend’s statement  is not accurate. The percent increase will be more than 2%.

To learn more about the percentage value visit:

brainly.com/question/11360390

7 0
2 years ago
If Alicia can read 3 pages in 1 minute, how long would it take her to read 33 pages?
Bond [772]

divide total pages by pages per minute

33 / 3 = 11 minutes

7 0
3 years ago
Other questions:
  • The length of a screw produced by a machine is normally distributed with a mean of 0.55 inches and a standard deviation of 0.01
    8·2 answers
  • Which of the following are solutions to the equation below?
    5·1 answer
  • Envision geometry 2018 question 1.3.9 answer
    9·1 answer
  • 4. Using the given information, which lines, if any, can you conclude are parallel? Justify your conclusion with a theorem or po
    9·1 answer
  • On average, a herd of elephants travels 10 miles in 12 hours.
    5·1 answer
  • 7th grade math please help would be nice
    15·1 answer
  • Alex and Jenna were selling cookies for girls scouts. Alex sold 6 boxes of thin mints for every 2 boxes of samoas that Jenna sol
    5·1 answer
  • Anyone else feel like there life is crashing down?
    15·2 answers
  • Answer this please!!!
    9·1 answer
  • If your scientific notation is 2.420 x 10° g (2.420 E 5 g), which direction would you move the decimal point to get the scientif
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!