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
umka21 [38]
3 years ago
15

En un recipiente de cobre de forma rectangular de aproximadamente 3.5 m largo por 4.5m ancho tiene una temperatura en temporada

de invierno 4 ° C . Calcular su superficie cuando este en verano a una temperatura 40 ° C . ( Cobre 16.6 x 10 ( -6 )
Physics
1 answer:
Darina [25.2K]3 years ago
3 0

Answer:

A_f= 15,769 m²

Explanation:

Este es un ejercicio de dilatación térmica,  

          ΔA = (2α) A₀ ΔT

el arrea de recipiente

          A₀ = L A

          A₀ = 3,5 4,5

          A₀=  15,75 m²

el coeficiente de dilatación térmica es alfa = 16,6 10⁻⁶ C⁻¹

calculemos

            ΔA = 2 16,6 10⁻⁶  15,75 ( 40 -4)

            ΔA = 522,9 (36)  10⁻⁶  

            A= 1,88 10⁻²  m2

el cambio de volumen es

          ΔA = A_f – A₀

          A_f = A₀ +  ΔA

          A_f=  15,75 +1,88 10⁻²  

          A_f= 15,769 m²

You might be interested in
why is a person who lives in the city able to sleep through the sounds of traffic but awaken to the soft sound of bird singing
mash [69]

They grew up  to that sound. They love the sound of that same traffic sound.

5 0
3 years ago
Read 2 more answers
How many planets are there?
Y_Kistochka [10]

Answer:

There are eight planets in our Solar System.

Explanation:

4 0
3 years ago
Read 2 more answers
What is the level of incidence
-Dominant- [34]

Answer:

The incidence rate is typically expressed as the number of cases per person-year of observation. Only new cases are considered when computing the incidence rate, while cases that were diagnosed earlier are excluded. The “population at risk” measure is usually obtained from census data.

Explanation:

The incidence rate is typically expressed as the number of cases per person-year of observation. Only new cases are considered when computing the incidence rate, while cases that were diagnosed earlier are excluded. The “population at risk” measure is usually obtained from census data.

5 0
3 years ago
Kinetic energy of an object is equal to
Arte-miy333 [17]
Choice-'b' says the formula for kinetic energy in words.

     KE = (1/2) · (M) · (S²)
7 0
3 years ago
Read 2 more answers
The Assignment: A fixed quantity of an ideal gas (R 0.28 kJ/kgK; Cv-0.71kJ/kgK) is expanded from an initial condition of 35 bar,
Nikolay [14]

Answer:

Index of expansion: 4.93

Δu = -340.8 kJ/kg

q = 232.2 kJ/kg

Explanation:

The index of expansion is the relationship of pressures:

pi/pf

The ideal gas equation:

p1*v1/T1 = p2*v2/T2

p2 = p1*v1*T2/(T2*v2)

500 C = 773 K

20 C = 293 K

p2 = 35*0.1*773/(293*1.3) = 7.1 bar

The index of expansion then is 35/7.1 = 4.93

The variation of specific internal energy is:

Δu = Cv * Δt

Δu = 0.71 * (20 - 500) = -340.8 kJ/kg

The first law of thermodynamics

q = l + Δu

The work will be the expansion work

l = p2*v2 - p1*v1

35 bar = 3500000 Pa

7.1 bar = 710000 Pa

q = p2*v2 - p1*v1 + Δu

q = 710000*1.3 - 3500000*0.1 - 340800 = 232200 J/kg = 232.2 kJ/kg

7 0
3 years ago
Other questions:
  • Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain?
    5·1 answer
  • 2 Points
    12·1 answer
  • Quentin is a crime scene investigator. He believes a violent crime may have occurred in the bedroom of an apartment but he sees
    6·1 answer
  • Consider a helium balloon with volume 2.1 L.
    12·1 answer
  • Chromosomes from the mother control whether a child is male or female. Please select the best answer from the choices provided.
    5·2 answers
  • A cinder block is sitting on a platform 10 m high. It has a mass of 25 Kg. What is the potential energy
    15·1 answer
  • If a car is rounding a flat curve on a highway, what is the centripetal force on the car?
    12·1 answer
  • Based on Newton's 3rd law, the force pairs always act on what?
    13·2 answers
  • A particular laser developed in 1995 at the University of Rochester, in New York, produced a beam of light that lasted for about
    11·1 answer
  • 10. Complete each of the following radioactive decay equations.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!