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
BaLLatris [955]
3 years ago
10

A box with sides of length 40 cm is made up of six pieces of concrete of thickness 5 mm. The inside of the box is filled with 10

0 moles of a diatomic ideal gas while the temperature outside the box is 30°C. At what rate is the temperature of the gas increasing when the gas is at -40°C? (The thermal conductivity of concrete is 0.33 W/(m×K).)a) 1.22 °C/s b) 1.45 °C/s c) 1.68 °C/s d) 2.13 °C/s e) 2.90 °C/s
Physics
1 answer:
Damm [24]3 years ago
4 0

Answer:

d)2.13 C s⁻¹

Explanation:

Rate of flow of heat through walls

=\frac{KA(T_2-T_1)}{d}

K = .33

A = 6 X .4 X .4 =0.96

T₂-T₁ = 30+40 = 70

d = 5 x 10⁻³

Put these data in the relation above

Rate of flow of heat

= \frac{.33\times.96\times70}{5\times10^{-3}}

= 4435.2 Js⁻¹

Specific heat of gas = 2.5 R = 20.785 J

Rise in temp = \frac{4435.2}{100\times20.785}

= 2.13 degree celsius.

You might be interested in
Business are necessary in order to preform which of the following functions
NeTakaya

Answer:

Hire, organize, and supply workers.

Explanation:

7 0
2 years ago
How does a mathematical model help you understand the science concepts
Dmitrij [34]
It can help with measurements and when you want to add measurements to a cylinder or a beaker so ya
7 0
3 years ago
The best type of exercise for weight loss is
lbvjy [14]

Answer:

finding a workout.

Explanation:

6 0
3 years ago
The children at the local park think the slide is too slow. There is too much fiction. What could you do to decrease the amount
igor_vitrenko [27]
In order to decrease the friction on the slide,
we could try some of these:

-- Install a drippy pipe across the top that keeps continuously
dripping olive oil on the top end of the slide.  The oil oozes
down the slide and keeps the whole slide greased.

-- Hire a man to spread a coat of butter on the whole slide,
every 30 minutes.

-- Spray the whole slide with soapy sudsy water, every 30 minutes.

-- Drill a million holes in the slide,and pump high-pressure air
through the holes.  Make the slide like an air hockey table.

-- Keep the slide very cold, and keep spraying it with a fine mist
of water.  The water freezes, and a thin coating of ice stays on
the slide.

-- Ask a local auto mechanic to please, every time he changes
the oil in somebody's car, to keep all the old oil, and once a week
to bring his old oil to the park, to spread on the slide.  If it keeps
the inside of a hot car engine slippery, it should do a great job
keeping a simple park slide slippery.

-- Keep a thousand pairs of teflon pants near the bottom of the ladder
at the beginning of the slide.  Anybody who wants to slide faster can
borrow a set of teflon pants, put them on before he uses the slide, and
return them when he's ready to go home from the park.
7 0
3 years ago
Two spheres are cut from a certain uniform rock. One has radius 4.50 cm. The mass of the other is five times greater. Find its r
Sonja [21]
Vol of sphere = 4/3 pi r^2.density of sphere = mass/volume.mass = densityxvolumesphere 1. mass = density x 4/3 pi 4.5^2sphere 2 5mass = density x 4/3 pi r^25=4/3 pi r^2 divided by 4/3 pi 4.5^25=r^2 divided by  4.5^25x4.5^2=r^2root(5x4.5^2)=r4.5 root 5 = r
4 0
2 years ago
Read 2 more answers
Other questions:
  • When the man inside the treadmill steps up, what force pulls home back? In what direction does this force move him?
    10·1 answer
  • If a car accelerated from 5 m/s to 25 m/s in 10 seconds what is it's acceleration?
    11·1 answer
  • A small sphere of mass m is launched horizontally over a body of water from a height h above the water and with a launch speed v
    15·1 answer
  • If you increase the resistance in a series circuit, ________________
    5·1 answer
  • A magnetic field is applied to a freely floating uniform iron sphere with radius R = 2.00 mm. The sphere initially had no net ma
    6·1 answer
  • An 88.0 kg spacewalking astronaut pushes off a 645 kg satellite, exerting a 110 N force for the 0.450 s it takes him to straight
    10·1 answer
  • when a person is making cardiovascular gains through aerobic activity, they are increasing what to the lungs and heart?
    13·1 answer
  • When the blood flows through the capillary bed, most of the plasma will return to the heart through the venules. What happens to
    7·2 answers
  • HELPPPP LOOK AT THE SCREENSHOT TO ANSWER THE QUESTIONS
    5·1 answer
  • The space station is 4.41 x 10^5 kg and orbits the earth 6.78 x 10^6 m from the center of earth. The mass of earth is 5.97 x 10^
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!