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
Bogdan [553]
3 years ago
15

No interior de um calorímetro de capacidade térmica 6 cal/°C encontram-se 85 g de um líquido a 18°C. Um bloco de cobre de massa

120 g e calor específico 0,094 cal/g°C, aquecido a 100°C, é colocado dentro do calorímetro. O equilíbrio térmico se estabelece a 42°C. Determine o calor específico do líquido.

Physics
2 answers:
MrRissso [65]3 years ago
4 0

Answer:

Heat Exchange

Explanation:

<em>Within a 6 cal / ° C thermal capacity calorimeter is 85 g of a liquid at 18 ° C. A block of copper of mass 120 g and specific heat 0.094 cal / g ° C, heated to 100 ° C, is placed within the calorimeter. The thermal equilibrium is established at 42 ° C. Determine the specific heat of the liquid.</em>

I will add the answer as an image, as the system encounters Bug and warns that there are external links in the response.

Lyrx [107]3 years ago
3 0

a fórmula do calor sensível é Q = m.c.ΔT


m = massa

c = calor específico do corpo

ΔT = variação de temperatura (Tf - Ti)


quando ocorre o equilíbrio térmico, a soma dos calores trocados entre os corpos é 0:

QA + QB + QC = 0

sabendo que a capacidade térmica é o produto m.c e substituindo os demais valores fornecidos no enunciado:


QA = calor sensível do calorímetro = (6 cal/°C).(42-18)

QB = calor sensível do líquido =  (85g).c.(42-18)

QC = calor sensível do bloco =  (120g).(0,094 cal/g°C).(42-100)


substituindo na expressão para calcular c, o calor específico do líquido :


(6 cal/°C).(42°C-18°C) +  (85g).c.(42°C-18°C) + (120g).(0,094 cal/g°C).(42°C-100°C) = 0


144cal + 2040c - 654,2cal = 0


 2040c = 510cal


c = 510cal/2040g.°C


c = 0,25cal/g.°C


You might be interested in
Why is ice harder than liquid water?
yaroslaw [1]
Hello~ 

Ice is harder than liquid water because<span> the molecules of ice are linked more tightly together than the molecules of liquid water. 

Hope this helps! </span>
6 0
3 years ago
Write the resistivity of gold, iron ,Mercury, silver,copper? which is bad conductor?​
Tamiku [17]

Answer:

Mercury is a bad conductor of heat but a fair conductor of electricity

By the way PURE SILVER is the best conductor of electricity

Please Mark as brainliest

3 0
2 years ago
Is this statement true or false? The next generation of nuclear power plants being built in California and South Africa are even
alexira [117]

Answer:

True

Explanation:

Modern safer and cheaper nuclear reactors can not only meet the range of our long term energy demands, they can also fight global warming.

Modern techniques provide ways to reduce radioactive waste amount. "A closed fuel cycle may be switched on for new kinds of nuclear plants. Alternatively, the waste is chemically dissuaded to transform the reusable element into fuel. This implies that nuclear waste would not be buried.

8 0
3 years ago
You place your pencil on your desk it stays there
zepelin [54]

Answer:

yes

Explanation:

6 0
3 years ago
Read 2 more answers
Identify the pros and cons of using mirrors versus lenses in each of the following applications:
disa [49]

Answer:

Explanation:

A lens – An object, usually made of glass, that focuses or defocuses the light that passes through it.

A mirror – A smooth surface, usually made of glass with reflective material painted on the underside, that reflects light so as to give an image of what is in front of it.

Telescope – monocular optical instrument possessing magnification for observing distant objects, especially in astronomy.

Refracting telescopes – are telescopes that use lenses are and those that use concave parabolic mirrors are called reflecting telescopes. 

Pros of mirror telescope

• They are easier to construct and not expensive to produce

• made larger and more durable (more light can be directed to the eyepiece which is good)

• cannot have any occlusions 

• mirrors have less spherical aberration

• reflect all wavelengths of light equally

• more magnification power for cheaper version

Cons of mirror prisms

• it must also be realigned after cleaning, which can be expensive - maintenance disadvantage

• Reflective Surface Disadvantage

Pros of Lenses telescope

• Easy to use

• More reliable

Cons of Lens telescope

• are not easy to construct and expensive to produce

• May have occlusions

• spherical aberration are more

• Doesnt reflect wavelengths of light equally they bend light differently

• Less magnification power for cheaper version

• heavy

• Longer body

Pro of Mirror periscope

• it helps us to see further than our view that is what is above us or sometimes even below us.

•Light weight

disadvantage:

• it may not work properly and show distorted images due to fog. ; Some have a narrow field of view ; May be detected by others Ungainly (long, takes up space),

•Not as rugged as prisms.

• Maintenance of reflection surface

Pros of Prism periscopes

• incorporated lenses for magnification and function as telescopes.

• They typically employ prisms and total internal reflection instead of mirrors, because prisms, which do not require coatings on the reflecting surface, are much more rugged than mirrors.

• May be fitted with additional optical capabilities such as range-finding and targeting.

Cons.

•mechanically disadvantage: Complex optically ; Some have a narrow field of view ; May be detected by others 

Ungainly (long, takes up space)

• Heavy weight

Lens - Terrestrial telescope

Pro: An advantage is that it makes it possible to vary the magnification of the telescope.

Cons- This system has the disadvantage increasing the length of the telescope.

Mirror- Terrestrial telescope (Cassegrain)

Pro: Good for distant terrestrial viewing.

greater magnification is attained.

They are more shorter

Cons- It is not what people expect a telescope to look like.

Slight light loss due to secondary mirror obstruction compared to refractors. Generally not suited for most terrestrial applications nor for to view objects in the sky.

6 0
3 years ago
Other questions:
  • _____ varies with the gravitational force. Plz help. Due tomorrow.
    13·2 answers
  • Restate newton's first law in terms of acceleratin
    11·1 answer
  • The gravitational force between two asteroids is 1,000,000 n. what will the force be if the distance between the asteroids is do
    13·1 answer
  • Copper has a specific heat of 0.386 J/g°C. How much heat is required to increase 5.00 g of copper from 0.0°C to 10.0°C?
    10·1 answer
  • In a football game, a 90 kg receiver leaps straight up in the air to catch the 0.42 kg ball the quarterback threw to him at a vi
    14·1 answer
  • How does a bicycle dynamo work?<br>​
    6·2 answers
  • A copper plate is free to swing between the poles of a large electromagnet. When the field is turned up the plate Group of answe
    12·1 answer
  • Suppose you have a total charge qtot that you can split in any manner. Once split, the separation distance is fixed. How do you
    5·1 answer
  • 2 part question
    5·1 answer
  • What do you have to do to become faster at running?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!