Homework Answers
Conductance through ice = kA/t
= 2.18*200*10^6/20 = 2.18*10^7 W/K
Current = 2.18e7*(20-4)
= 3.488*10^8 W
Thia current is too huge to drive a pick up
Add Answer to:
A lake of area 200km^2 is covered by a slab of ice of unknown thickness. The...
During a cold winter, the surface of a river develops a layer of ice of unknown...
During a cold winter, the surface of a river develops a layer of ice of unknown thickness L. Known are the water temperature Ty=4°C, the atmospheric air temperature T=-30°C, and the temperature of the underside of the ice layer To= 0°C. The thermal conductivity of ice is k = 1.88 W/m-K. The convective heat transfer coefficients on the water and air sides of the ice layer are hw = 100 W/m²-K and ha= 50 W/m2-K, respectively. Calculate the temperature of...
You flew from Pomona,California, and went ice fishing with Grandpa on a lake in rural Minnesota....
You flew from Pomona,California, and went ice fishing with Grandpa on a lake in rural Minnesota. You were concerned the ice would crack and you would fall with Grandpa onto the lake. The temperature right above the lake was 5 C. Your Grandpa said the lake won't crack, it is 65 ft deep and the temperature at the bottom of the lake is 20 C and he wanted to walk on the lake and start ice fishing. You didn't know...
When the air temperature is below 0 C, the water at the surface of a lake...
When the air temperature is below 0 C, the water at the surface of a lake freezes to form an ice sheet. The longer the air remains at this temperature, the thicker the ice sheet will become. Will a lake in Minnesota that is uniformly 40 m deep ever freeze solid? To answer this, calculate how long it would take to freeze all the water in the lake. Assume that the upper surface of the ice sheet is steady at...
10) When the air temperature is below 0 Celsius, the water of a lake freezes to...
10) When the air temperature is below 0 Celsius, the water of a lake freezes to form an ice sheet. The time required to freeze the ice sheet is proportional to the thickness squared if the heat of fusion of the water freezing on the underside of the sheet is conducted through the sheet. Assuming the upper surface of the sheet is at -10 Celsius and the bottom at 0 Celsius, calculate the time it will take to form an...
A 0.304-m-thick sheet of ice covers a lake. The air temperature at the ice surface is...
A 0.304-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -19.0 °C. In 6.00 minutes, the ice thickens by a small amount. Assume that no heat flows from the ground below into the water and that the added ice is very thin compared to 0.304 m. Calculate the number of millimeters by which the ice thickens
Please include a clear picture showing the variables in the problem. Thanks OO0Kg? on salbly CafTy...
Please include a clear picture showing the variables in the
problem. Thanks
OO0Kg? on salbly CafTy 2. Do you like ice skating? A 0.3 m (approximately 1ft) thick sheet of ice covers a lake. The air temperature above the ice is -15 °C (5F) and the water temperature is essentially 0 °C (32F), Assume that the heat flow through the ice freezes a thin layer of water onto the bottom of the sheet. How thick a layer is created in...
Consider an infinite slab of thickness 2a and uniform volume charge density ρ. This is essentially...
Consider an infinite slab of thickness 2a and uniform volume charge density ρ. This is essentially an infinite plane with a non-negligible thickness. Since the planar symmetry involves:艹-2 reflection symmetry, as well as the translation symmetry along the and y direc- tions, we place the origin at a point on the midplane of the slab. In other words, the midplane corresponds to oo = 0 (i.e., the ry plane) and the surfaces of the slab are at a (a) Use...
5 points Consider a flat metal plate of negligible thickness and area of each face A...
5 points Consider a flat metal plate of negligible thickness and area of each face A = 0.5 m2, and mass m = 10.0 kg The plate is placed on a large flat sheet of ice, such as a frozen lake surface. Due to the weight of the plate, some of the ice under the plate melts to form a layer of water of thickness h=5.0e-4 m. At time t = Os (ie. initial time), a constant force horizontal F...
3. A water heater is covered with insulation boards over a total surface area of 3...
3. A water heater is covered with insulation boards over a total surface area of 3 m. The board is 5.3 centimeter thick. The inside board surface is at 69'C, and the board material has a conductivity of 0.08 W/m-K. If the heat loss is 200 W, determine the outside surface temperature. Given A= 3m? T= 69°C Tonto? K= 0.08 W/mk Q=2oow 4. Determine the total rate of heat transfer from a person standing in a breezy room at 20°C...
A notice appeared on your front door – apparently your sidewalk is covered in ice and...
A notice appeared on your front door – apparently your sidewalk
is covered in ice and posing a hazard. Being poor college students,
how much will it cost to melt the ice? • Your sidewalk is 1 m wide,
20 m long, and has (on average) a 6 mm thick ice coating. • The
outside air temperature will not get above -15 °C any time soon. •
Salt costs $1.60/kg. • Assume ice has a density of 0.92
g/cm
20...
During a cold winter, the surface of a river develops a layer of ice of unknown thickness L. Known are the water temperature Ty=4°C, the atmospheric air temperature T=-30°C, and the temperature of the underside of the ice layer To= 0°C. The thermal conductivity of ice is k = 1.88 W/m-K. The convective heat transfer coefficients on the water and air sides of the ice layer are hw = 100 W/m²-K and ha= 50 W/m2-K, respectively. Calculate the temperature of...
10) When the air temperature is below 0 Celsius, the water of a lake freezes to form an ice sheet. The time required to freeze the ice sheet is proportional to the thickness squared if the heat of fusion of the water freezing on the underside of the sheet is conducted through the sheet. Assuming the upper surface of the sheet is at -10 Celsius and the bottom at 0 Celsius, calculate the time it will take to form an...
Please include a clear picture showing the variables in the
problem. Thanks
OO0Kg? on salbly CafTy 2. Do you like ice skating? A 0.3 m (approximately 1ft) thick sheet of ice covers a lake. The air temperature above the ice is -15 °C (5F) and the water temperature is essentially 0 °C (32F), Assume that the heat flow through the ice freezes a thin layer of water onto the bottom of the sheet. How thick a layer is created in...
Consider an infinite slab of thickness 2a and uniform volume charge density ρ. This is essentially an infinite plane with a non-negligible thickness. Since the planar symmetry involves:艹-2 reflection symmetry, as well as the translation symmetry along the and y direc- tions, we place the origin at a point on the midplane of the slab. In other words, the midplane corresponds to oo = 0 (i.e., the ry plane) and the surfaces of the slab are at a (a) Use...
5 points Consider a flat metal plate of negligible thickness and area of each face A = 0.5 m2, and mass m = 10.0 kg The plate is placed on a large flat sheet of ice, such as a frozen lake surface. Due to the weight of the plate, some of the ice under the plate melts to form a layer of water of thickness h=5.0e-4 m. At time t = Os (ie. initial time), a constant force horizontal F...
3. A water heater is covered with insulation boards over a total surface area of 3 m. The board is 5.3 centimeter thick. The inside board surface is at 69'C, and the board material has a conductivity of 0.08 W/m-K. If the heat loss is 200 W, determine the outside surface temperature. Given A= 3m? T= 69°C Tonto? K= 0.08 W/mk Q=2oow 4. Determine the total rate of heat transfer from a person standing in a breezy room at 20°C...
A notice appeared on your front door – apparently your sidewalk
is covered in ice and posing a hazard. Being poor college students,
how much will it cost to melt the ice? • Your sidewalk is 1 m wide,
20 m long, and has (on average) a 6 mm thick ice coating. • The
outside air temperature will not get above -15 °C any time soon. •
Salt costs $1.60/kg. • Assume ice has a density of 0.92
g/cm
20...
Most questions answered within 3 hours.
-
1. Develop a use case diagram for the bank case study described
in Chapter 1. 2....
asked 6 minutes ago -
The phylum Protista has often been referred to as a junk drawer
of classification. Explain what...
asked 12 minutes ago -
The average amount of money spent for lunch per person in the
college cafeteria is $7.09...
asked 14 minutes ago -
You follow the lab procedure and at the end of Part 4C, you used
an average...
asked 33 minutes ago -
Write 250-450 words, about the following: • Analyze how a
servant leader in your organization or...
asked 37 minutes ago -
3. American and Japanese workers can each produce 4 cars a
year. An American worker can...
asked 40 minutes ago -
On October 1, 20X1, a company purchased a piece of land by
agreeing to pay the...
asked 52 minutes ago -
Jamie is doing a survey at her school about whether the students
feel the cafeteria food...
asked 57 minutes ago -
What are the roles of 3' and 5' untranslated regions in
mRNAs?
asked 58 minutes ago -
A domestic television receives antenna delivers a sky noise
power of -105 dBm to a matched...
asked 57 minutes ago -
What do you think are the chemical reactions involved in the
breathalyzer tests administered to potentially...
asked 1 hour ago -
A random sample of 120 observations produces a mean of
38.2 from a population with a...
asked 1 hour ago