Homework Answers
Add Answer to:
12,/A cylindrical copper kettle has a 10 e radius and walls that are 2.0 mm thick....
A stainless-steel-bottomed kettle, its bottom 28 cm in diameter and 1.6 mm thick, sits on a...
A stainless-steel-bottomed kettle, its bottom 28 cm in diameter and 1.6 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 W . What is the temperature of the bottom surface of the kettle? Thermal conductivity of stainless steel is 14 W/(m⋅K). Express your answer in degrees Celsius to four significant figures.
(a) Calculate the rate of heat conduction through house walls that are 15.5 cm thick and...
(a) Calculate the rate of heat conduction through house walls that are 15.5 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 125 m2 and their inside surface is at 21.0°C, while their outside surface is at 5.00°C. W (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction? (Round your answer to the...
Problem : A cryogenic flui d is flowing in a 304 SS pipe. The pipe is...
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
Heat Transfer Problems 1. A window pane (1/8 inch thick) in an old house owned by...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
A thermopane window consists of two glass panes, each 0.50 cm thick, with a 1.0-cm-thick sealed...
A thermopane window consists of two glass panes, each 0.50 cm thick, with a 1.0-cm-thick sealed layer of air in between. (Use 0.8 J/s middot m middot degree C for the thermal conductivity of glass and 0.0234 J/s middot m middot degree C for the thermal conductivity of air to answer the following.) (a) If the inside surface temperature is 22.9 degree C and the outside surface temperature is 0.0 degree C, determine the rate of energy transfer through 1.60...
A concrete wall of a house is 45 cm thick and has a surface area 20m...
A concrete wall of a house is 45 cm thick and has a surface area 20m x 5 m. The inside temperature of the wall is 47 °C and the outside air temperature is 14 °C. Thermal conductivity of the concrete wall is 0.8 W/mK. Calculate the heat transfer rate through the wall by conduction and its thermal resistance.
A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere of...
A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere of inner radius 1.5 m with 0.36-m thick walls. Part A What is the conductive heating rate through the walls if the inside temperature is 11 ∘C and the outside temperature is -15 ∘C ? Hint: Use the conductive heating equation HConduction=KA(T2−T1)/l, where A is surface area, l is the distance that the thermal energy travels, and K is thermal conductivity. To calculate the surface...
need help Problem 5: Suppose a house's walls are 14 cm thick and and have an...
need help
Problem 5: Suppose a house's walls are 14 cm thick and and have an average thermal conductivity twice that of glass wool. Substance Glass wool Wool Glass Human body Ceramic Wood Air Fatty tissue Styrofoam Thermal conductivity (J/s.m.) 0.042 0.04 0.84 0.2 0.84 0.08-0.16 0.023 0.2 0.010 Otheexperta.com Part (a) Calculate the rate of heat conduction, in watts, through the house's walls. Assume there are no windows or doors. The surface area of the walls is 105 m...
The wall of a house is 3 m high, 10 m long and 30 cm thick;...
The wall of a house is 3 m high, 10 m long and 30 cm thick; it has an effective thermal conductivity of 10 W/m K. The outer surface of the wall has an emissivity of 0.75. On a winter night, the outer surface of this wall is at a temperature of 0 °C and the air is at a temperature of –10 °C. The heat transfer coefficient for the outside wall is 8 W/m2 K. The outside wall also...
A long, thick cylindrical conductor of radius a-20 mm, charged with a surface charge density ps...
A long, thick cylindrical conductor of radius a-20 mm, charged with a surface charge density ps 0.01 C/m2, is located in free space. Calculate the energy stored per unit length of the conductor within a radius b - 100 m from the conductor. Indicate your answer in J/m
Problem
:
A cryogenic flui
d is flowing in a
304 SS
pipe.
The pipe is insulated
on its outside surface
with
6
-
mm thick,
evacuated,
aluminum foil/glass mat insulation.
(“Evacuated” means a partial vacuum is drawn on the
insulation to
remove air that would otherwise fill
pores inside the insulation.)
The pipe
inside diameter
is 127 mm; it’s outside diameter is 138 mm.
The
fluid temperature is
-
173
o
C
.
T
he
air temperature
outside the...
Heat Transfer
Problems 1. A window pane (1/8 inch thick) in an old house owned by a professor is 3 ft. by 4 ft. He likes to be warm in the winter so the inside temperature is kept at 70 °F even when the outside temperature is 10 •F. For this problem assume the inside and outside temperatures are for the window surface. How much heat is transferred through the window (k=.54 BTU/hr ft ° F)? 2. A small heated...
A thermopane window consists of two glass panes, each 0.50 cm thick, with a 1.0-cm-thick sealed layer of air in between. (Use 0.8 J/s middot m middot degree C for the thermal conductivity of glass and 0.0234 J/s middot m middot degree C for the thermal conductivity of air to answer the following.) (a) If the inside surface temperature is 22.9 degree C and the outside surface temperature is 0.0 degree C, determine the rate of energy transfer through 1.60...
A concrete wall of a house is 45 cm thick and has a surface area 20m x 5 m. The inside temperature of the wall is 47 °C and the outside air temperature is 14 °C. Thermal conductivity of the concrete wall is 0.8 W/mK. Calculate the heat transfer rate through the wall by conduction and its thermal resistance.
need help
Problem 5: Suppose a house's walls are 14 cm thick and and have an average thermal conductivity twice that of glass wool. Substance Glass wool Wool Glass Human body Ceramic Wood Air Fatty tissue Styrofoam Thermal conductivity (J/s.m.) 0.042 0.04 0.84 0.2 0.84 0.08-0.16 0.023 0.2 0.010 Otheexperta.com Part (a) Calculate the rate of heat conduction, in watts, through the house's walls. Assume there are no windows or doors. The surface area of the walls is 105 m...
A long, thick cylindrical conductor of radius a-20 mm, charged with a surface charge density ps 0.01 C/m2, is located in free space. Calculate the energy stored per unit length of the conductor within a radius b - 100 m from the conductor. Indicate your answer in J/m
Most questions answered within 3 hours.
-
Fill in the Blank. James being older than Joe is a
___________ and
____________ condition for...
asked 5 minutes ago -
What qualifies an employer to comply with the FMLA?
asked 5 minutes ago -
“In the early stage of discovery - why is it important
to determine the type of...
asked 4 minutes ago -
1. Cesium-137 is a strong beta emitter. That means it
becomes positively charged
&nb
asked 16 minutes ago -
A jet flying at 114 m/s banks to make a horizontal circular
turn. The radius of...
asked 22 minutes ago -
what are the effects of transient and wheel loads on
pavements?
asked 20 minutes ago -
Explain how the transmission of CJD can be familial, sporadic,
iatrogenic, and infectious and yet they...
asked 23 minutes ago -
which component determines how long an mRNA transcript remains
in a cell (the half-life of the...
asked 18 minutes ago -
Which of the following trade-offs does a company need to
consider with compensation management?
Performance-reward
Risk-reward...
asked 22 minutes ago -
A projectile is launched from the edge of a cliff with a
velocity of 15.0 m/s...
asked 23 minutes ago -
Personal Reflection
1.) What career-related challenges do you anticipate?
2. What strategies or resources do you...
asked 36 minutes ago -
Teen pregnancy is a problem in Texas, which currently has the
5th highest teen pregnancy rate...
asked 42 minutes ago