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
Drupady [299]
3 years ago
8

An unknown material, m1 = 0.45 kg, at a temperature of T1 = 91 degrees C is added to a Dewer (an insulated container) which cont

ains m2 = 1.3 kg of water at T2 = 23 degrees C. Water has a specific heat of cw = 4186 J/(kg⋅K). After the system comes to equilibrium the final temperature is T = 31.4 degrees C.
a. Input an expression for the specific heat of the unknown material.
b. What is the specific heat in J (kgK)?
Physics
1 answer:
goldenfox [79]3 years ago
7 0

Answer:

Explanation:

Let the specific heat of material be s

heat lost by material = m₁ s (T 1 - T ) ,  (T 1 - T ) is fall in temp , m₁ is mass of material

= .45 x s x (91 - 31.4 )

= 26.82 s

Heat gained by water

= m₂ cw (T2 - T )

1.3 x 4186 x ( 31.4 - 23 )

heat lost = heat gained

m₂ cw (T2 - T ) = m₁ s (T 1 - T )

1.3 x 4186 x ( 31.4 - 23 ) =  .45 x s x (91 - 31.4 )

45711.12 = 26.82 s

s = 1704.36

You might be interested in
What is the resultant of the vectors shown?
ad-work [718]

Answer:

Option B

Explanation:

Option A is the wrong answer because the horizontal vector is in the opposite direction.

Option C is the wrong answer as the horizontal vector is in the opposite direction and all the vectors are connected head to tail [of the arrows] [Triangle law of vector addition]

Option D is the wrong answer as the horizontal vector is in the opposite direction.

5 0
2 years ago
The graph in the figure shows the variation of the electric potential V(x) (in arbitrary units) as a function of the position x
dmitriy555 [2]
The best and most correct answer among the choices provided by your question is the second choice or letter b.

Ex is negative from x = -2 to x = 0, and positive from x = 0 to x = 2 <span>correctly describes the orientation of the x-component of the electric field along the x-axis.</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
7 0
3 years ago
4.   Which of the following is the term used to describe a body's resistance to a change in motion? 
Alborosie
Inertia ..................
5 0
3 years ago
Jimmy is cooking pasta in a pot of water on the stove. He uses a stopwatch to see how long the pasta takes to cook depending on
Alex787 [66]

Answer:

stove

Explanation:

The stove is the independent variable in this question as it does not depend on anything like other variables such as pot, water, temperature and of cause pasta.

The pot depends on the stove, the water depends on the pot and stove, the pasta depends on the water and its temperature.

Cheers.  

4 0
3 years ago
According to general relativity, light : travels along a curve due to length contraction
Rama09 [41]

Answer:

travels along a curve due to uniform gravity

Explanation:

General relativity

The theory was developed by Albert Einstein , it is the theory of gravitation , according to which , the gravitation effect which is observed between the masses , is the resultant of their warping of the space time .

In general relativity , the equivalence principle is the equivalence of inertial gravitational mass .

According to which , the light bends due to gravitational forces ,therefore ,  the light travels along a curve because of uniform gravity .

5 0
3 years ago
Other questions:
  • Need help with two physics questions!
    8·1 answer
  • When comparing an x-ray to a radio wave, what should you look for to determine which formula represents the x-ray?
    10·2 answers
  • What is the maximum weight a boat can hold if a boat can displace 60.5ml?
    6·1 answer
  • Vector A has a magnitude of 16 m and makes an angle of 44° with the positive x axis. Vector B also has a magnitude of 13 m and i
    7·1 answer
  • What is the best conclusion for the events taking place on a molecular level in the images seen here?
    13·1 answer
  • It was a cold, sunny day and the ground was covered with fresh snow. Maria wore her black sweatshirt outside to play in the snow
    6·2 answers
  • How do you measure the wavelength of a wave?
    8·2 answers
  • An inner city revitalization zone is a rectangle that is twice as long as it is wide. The width of the region is growing at a ra
    7·2 answers
  • Which columns are mislabeled?
    5·2 answers
  • What are the two most important traits between a whale and a shark?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!