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
serg [7]
3 years ago
13

The following three hot samples have the same temperature. The same amount of heat is removed from each sample. Which one experi

ences the smallest drop in temperature, and which one experiences the largest drop?
Sample A: 4.0 kg of water [c = 4186 J/(kg·C°)]

Sample B: 2.0 kg of oil [c = 2700 J/(kg·C°)]

Sample C: 9.0 kg of dirt [c = 1050 J/(kg·C°)]
Physics
1 answer:
vlabodo [156]3 years ago
8 0

Answer:

Smallest drop: Water

Largest drop: Dirt

Explanation:

The heat needed to change the temperature of a sample is:

Q=cm\Delta T (1)

with Q the heat (added(+) or removed(-)), c specific heat, m the mass and \Delta T the change in temperature of the sample. So, if we solve (1) for

Sample A:

\Delta T=-\frac{Q}{cm} =\frac{Q}{4186*4.0}

\Delta T=-\frac{Q}{16744}

Sample B:

\Delta T=-\frac{Q}{cm} =\frac{Q}{2700*2.0}

\Delta T=-\frac{Q}{5400}

Sample C:

\Delta T=-\frac{Q}{cm} =\frac{Q}{1050*9.0}

\Delta T=-\frac{Q}{9450}

Note that the numbers 16744, 5400, 9450 are in the denominator of the expression -\frac{Q}{cm} that gives the drop on temperature. so, if Q is the same for the three samples the smallest denominator gives the largest drop and vice versa.

So, the smallest drop is Sample A and the largest is Sample C.

(Important: The minus sign of \Delta T implies the temperature is dropping)

milfhunter
2 years ago
Why sample C has the largest temperature drop not sample B
You might be interested in
What is the Nitrogen Family
Lorico [155]

Nitrogen forms many chemical compounds, such as amino acids, ammonia, nitric acid and cyanide.

6 0
3 years ago
A doctor pushes the plunger of syringe down and then pulls it up to a draw liquid into a syringe? give reason please help me wit
ruslelena [56]

Answer:

When the doctor has the syringe, it is full of air. So, now after the doctor pushes the plunger, hence the air gets released into the medicine container. After this the doctor then takes the plunger and pull it back. Now , the air gets pulled up back into the syringe, but not only does the air come in but also the medicine because of the pressure build up.

If my answer helped, please mark me as the brainliest!!

Thank You!

4 0
3 years ago
Burning a canful of petrol or dropping it. which is likely to release most energy?​
Neporo4naja [7]

Answer:

Burning of canful of petrol will release more energy

Explanation:

If you like my answer than please mark me brainliest

5 0
3 years ago
Can someone help quickly please and thank you
Sergio039 [100]

Answer:

I think D??

Explanation:

8 0
3 years ago
Assume that the position vector of A is r=i+j+k . Determine the moment about the origin O if the force F=(1)i+(0)j+(5)k . The mo
ddd [48]

Answer:

M₀ = 5i - 4j - k

Explanation:

Using the cross product method, the moment vector(M₀) of a force (F) is about a given point is equal to cross product of the vector A from the point (r) to anywhere on the line of action of the force itself. i.e

M₀ = r x F

From the question,

r = i + j + k

F = 1i + 0j +  5k

Therefore,

M₀ = (i + j + k) x (1i + 0j +  5k)

M₀ = \left[\begin{array}{ccc}i&j&k\\1&1&1\\1&0&5\end{array}\right]

M₀ = i(5 - 0) -j(5 - 1) + k(0 - 1)

M₀ = i(5) - j(4) + k(-1)

M₀ = 5i - 4j - k

Therefore, the moment about the origin O of the force F is

M₀ = 5i - 4j - k

3 0
3 years ago
Other questions:
  • To find power we need to determine?
    5·1 answer
  • Planet that is one astronomical unit from the sun
    14·1 answer
  • Which of these experiments would make use of qualitative data?
    15·2 answers
  • After the first solid grains formed in our solar system, these particles could then grow by the process of ____, the collision a
    6·1 answer
  • A balloon is filled with 80 liters of gas on a day where the temperature was 34 degrees at sea level which is 101.3 kPa and rele
    15·1 answer
  • The reaction between magnesium (Mg) and oxygen (O2) forms magnesium oxide (MgO).
    7·1 answer
  • Which statement best explains why Earth’s outer core is in liquid form? The iron-nickel alloy melts due to hot temperatures. The
    14·2 answers
  • The force of attraction that a -40.0 μC point charge exerts on a +108 μC point charge has magnitude 4.00 N. How far apart are th
    12·1 answer
  • ONLY ANSWER IF YOU KNOW FOR SURE PLEASE :)
    13·1 answer
  • A force of 77 N is used to move a desk 1.5 m. How much work was done?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!