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
Sedbober [7]
2 years ago
12

You place a 500 g block of an unknown substance in an insulated container filled 2 kg of water. The block has an initial tempera

ture of 50 degrees C. The water is initially at 20 degrees C. If the equilibrium temperature of the block and water is 25 degrees C, what is the specific heat of the block? The specific heat of water is 4186 J. kg K. 3349 J, kg C 1189 J, kg C 5545 J, kg C 750 J/kg C 2080 J/kg C
Physics
1 answer:
Nina [5.8K]2 years ago
4 0

Answer:

3349J/kgC

Explanation:

Questions like these are properly handled having this fact in mind;

  • Heat loss = Heat gained

Quantity of heat = mcΔ∅

m = mass of subatance

c = specific heat capacity

Δ∅ = change in temperature

m₁c₁(∅₂-∅₁) = m₂c₂(∅₁-∅₃)

m₁ = mass of block = 500g = 0.5kg

c₁  = specific heat capacity of unknown substance

∅₂ = block initial temperature = 50oC

∅₁ = equilibrium temperature of block and water after mix= 25oC

m₂= mass of water = 2kg

c₂ = specific heat capacity of water = 4186J/kg C

∅₃ = intial temperature of water = 20oC

0.5c₁(50-25) = 2 x 4186(25-20)

And we can find c₁ which is the unknown specific heat capacity

c₁ = \frac{2*4186*5}{0.5*25}= 3348.8J/kg C≅ 3349J/kg C

You might be interested in
32. Only a small percentage of the energy
nordsb [41]
Only a small Percentage of the energy emitted by the sun strikes earth because, since the earth is going in circles round and round, the sun only hits part of the earth and not fully. So for example if the earth is going around and the sun hits Africa then in a couple minutes it will go to the next country and that country will have sunlight. Let me know if you need anything else or if this isn't partially correct. GLAD TO HELP! :)
5 0
3 years ago
PLEASE HELP ME THANK YOUUU
Taya2010 [7]

Answer:

A) or B) which ever you choose in order

Explanation

Hope it helps:)

3 0
2 years ago
Read 2 more answers
Thermal energy transfers from a cup of tea at 350 K to the hand holding it. <br> A)True<br> B)False
Alexandra [31]

Answer:

true

Explanation:

it is an energy transfer

6 0
2 years ago
Your teacher gives you a piece of cardboard with two pinholes on it, saying that they are separated by 205 μm ± 3%. In order to
wlad13 [49]

Answer:

m,lkj,mkn,njn

Explanation:because she is telling you to do a project

7 0
3 years ago
2) What did Rutherford discover in his experiment?<br> a) nucleus<br> b) electrons<br> c) neutrons
OlgaM077 [116]
A) nucleus because some aims reflected off the gold foil proving that there was something bigger inside the atom hence discovering the nucleus
5 0
1 year ago
Other questions:
  • What is the gravitational potential energy of a rock with the mass of 67 kg if it is sitting on top of a hill .35 kilometers hig
    15·1 answer
  • Why are the 4 properties (cohesive behavior, ability moderate temperatures, expansion upon freezing, + versatility as a solvent)
    7·1 answer
  • PLEASE HELP:::
    13·2 answers
  • 0.25-kg block oscillates on the end of a spring with a spring constant of 200 N/m. If the oscillations is started by elongating
    14·1 answer
  • Find the resistance of a circuit that draws 0.06 amperes with 12 volts applied
    7·2 answers
  • If the gap between C and the rigid wall at D is initially 0.15 mm, determine the magnitudes of the support reactions at A and D
    6·1 answer
  • An 8.0g bullet, moving at 400 m/s, goes through a stationary block of wood in 4.0 x 10^-4s, emerging at a speed of 100 m/s. (a)
    9·1 answer
  • How long does it take a 1.51 × 104 W steam engine to do 8.72 × 106 J of work? Round your answer to three significant figures
    6·1 answer
  • Explain how the velocity of the aeroplane will change in the vertical direction
    15·1 answer
  • What type of friction present when you wrench on a car?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!