Question
In: Mechanical Engineering
A large block having the properties of a chrome brick at 200oC is at uniform temperature...
A large block having the properties of a chrome brick at 200oC is at uniform temperature of 30oC when it is suddenly exposed to a constant surface flux of 3x104 W/m2. For this case, determine:
a. The temperature at a depth of 3 cm after a time of 10 min
b. The surface temperature at this time
Solutions
samet mamat answered 2 years agoRelated Solutions
The acceleration at which the block falls is uniform . That allows us to use kinematic...
The acceleration at which the block falls is uniform .
That allows us to use kinematic equations along the
y-direction to determine an equation for time.
Then, solving for time in terms of h and v f,
we get that
also .This problem also allows us to investigate the
angular portion of the spool, which is spinning without slipping as
the block is accelerating downwards.
What is an expression for the angular displacement the
spool goes through while the block...
Why is it important to maintain a uniform temperature gradient in a fractionating column?
Why is it important to maintain a uniform temperature gradient
in a fractionating column?
In an insulating box, there is a 140.0g block of lead whose temperature is 100K and...
In an insulating box, there is a 140.0g block of lead whose
temperature is 100K and a 70.0g block of tungsten whose temperature
is 300K. (a) What is the equilibrium temperature of the two-block
system? (b) What is the change in the internal energy of the system
between the initial and the equilibrium state? (c) What is the
change in the entropy of the system? (specific heat of tungsten:
0.0321cal/g · K, molar specific heat of tungsten: 24.8J/mol · K,...
1. A block of an alloy of mass 27.0 g and at a temperature of 277.22...
1. A block of an alloy of mass 27.0 g and at a temperature of
277.22 K is placed in a calorimeter containing 41.0 g of water at
357.74 K. If the final temperature of the alloy and water is 303.59
K, calculate the specific heat (in J/g/K) of the metal. The
specific heat of water is 4.184 J/g/K. Express your answer to three
significant figures in scientific notation.
2.A 0.439 g sample of solid N(CH3)4Cl (s)
is dissolved in...
1a) A block of an alloy of mass 33.0 g and at a temperature of 289.36...
1a) A block of an alloy of mass 33.0 g and at a
temperature of 289.36 K is placed in a calorimeter containing 36.0
g of ethylene glycol at 348.15 K. If the final temperature of the
alloy and ethylene glycol is 306.28 K, calculate the specific heat
(in J/g/K) of the metal. The specific heat of ethylene glycol is
2.39 J/g/K. Express your answer to three significant figures in
scientific notation.
b) A 0.0763 g sample of solid RbBr...
Why is it desirable for a country to have a large GDP? Will having a large...
Why is it desirable for a country to have a large GDP? Will
having a large GDP in a country solve the problem of equity. Why
and why not?
A uniform plastic block floats in water with 40.0 % of its volume above the surface...
A uniform plastic block floats in water with 40.0 % of its
volume above the surface of the water. The block is placed in a
second liquid and floats with 20.0 % of its volume above the
surface of the liquid.
What is the density of the second liquid?
A thin plate is initially at a uniform temperature of 200°C. At a certain timet =...
A thin plate is initially at a uniform temperature of 200°C. At
a certain timet = 0 the temperature of the east side of
the plate is suddenly reduced to 0°C. The other surface is
insulated. Use the explicit finite volume method in con- junction
with a suitable time step size to calculate the transient
temperature distribution of the slab and compare it with the
analytical solution at time (i) t = 40 s, (ii) t
= 80 s and...
To a rough approximation, the Earth can be treated as a greybody sphere with uniform temperature,...
To a rough approximation, the Earth can be treated as a greybody
sphere with uniform temperature, absorptance ? = 0.70 and
emissivity ? = 0.61. The low absorptance is largely due to
reflection of the incoming sunlight by clouds and ice, while the
low emissivity is largely due to greenhouse gases in the
atmosphere.
a) Over timescales of decades, the total solar
irradiance at the Earth varies between about 1360.3 W/m2
and 1362.0 W/m2 . Using the greybody Earth
approximation,...
To a rough approximation, the Earth can be treated as a greybody sphere with uniform temperature,...
To a rough approximation, the Earth can be treated as a greybody
sphere with uniform temperature, absorptance ? = 0.70 and
emissivity ? = 0.61. The low absorptance is largely due to
reflection of the incoming sunlight by clouds and ice, while the
low emissivity is largely due to greenhouse gases in the
atmosphere.
Q1) Over timescales of decades, the total solar
irradiance at the Earth varies between about 1360.3 W/m2
and 1362.0 W/m2 . Using the greybody Earth
approximation,...
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