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2.5. A thermometer is initially at a temperature of 70 °F and is suddenly placed in...
QUESTION: A thermometer is initially at a temperature of with a temperature of 180 F The...
QUESTION: A thermometer is initially at a temperature of with a temperature of 180 F The time constant of the ther a temperature of 75 Fis suddenly immersed into a tank of water a) What temperature will the thermometer read after 4s? b) W hat is the90%) esponse time in seconds? (ie. time at which change in output will be 90% of maximum change) c) At what time in seconds will the reading on the thermometer be (10 F
A thermometer reading 77∘77∘ F is placed in an oven preheated to a constant temperature. Through...
A thermometer reading 77∘77∘ F is placed in an oven preheated to a constant temperature. Through a glass window in the oven door, an observer records that the thermometer reads 279∘279∘ F after 1212 minute and 366∘366∘ F after 1 minute. How hot is the oven?
A thermometer is taken from an inside room to outside of the building where the air temperature is 5' F
#1). A thermometer is taken from an inside room to outside of the building where the air temperature is 5' F. After 1 minute, the thermometer reads 55° F and after 5 minutes, the thermometer reads 30°F. What was the initial temperature of the room?#2). A thermometer is removed from a room where the air temperature is 70°F to outside the building where the temperature is 10° F. After minute, the thermometer reads 50°F. What is the reading at t...
A thermometer is removed from a room where the temperature is 70° F and is taken...
A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F. After one-half minute the thermometer reads 60° F. What is the reading of the thermometer (in degrees Ferinheight) at t = 1 min? (Round your answer to two decimal places.) How long (in minutes) will it take for the thermometer to reach 45° F? (Round your answer to two decimal places.)
A thermometer reading 8°C is brought into a room with a constant temperature of 35°C (a)...
A thermometer reading 8°C is brought into a room with a constant temperature of 35°C (a) If the thermometer reads 15°C after 2 minutes, what will it read after being in the room for 4 minutes? For 9 minutes? b) Graph the relation between temperature and time. Use TRACE to verify that your answers are correct. A pizza baked at 450°F is removed from the oven at 6:00 PM into a room that is a constant 73oF. After 5 minutes,...
1. A force F(t) is suddenly applied to a mass m, which is supported by a...
1. A force F(t) is suddenly applied to a mass m, which is supported by a spring with a constant k After a short period of time r, the force is suddenly removed. During the time the force is active, it is a constant Determine the response of the system for t> τ. The spring and mass are initially at rest before the force F() is applied. (a) Use the convolution integral. (b) Use the Laplace Transform. (c) what values...
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C...
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C is suddenly exposed to a convection environment in which the fluid temperature is 50°C and the heat- transfer coefficient is 1200 W/ m K. Calculate the temperature of the plate at a depth of 1.5 cm from one of the surfaces after 3 min. How much heat is lost from the plate during this time? Ans: Tplate = plane
Example 5 • A cube (k=204W/mK, đ=8.4x10-5m-/s) of 11 cm on each side is initially at...
Example 5 • A cube (k=204W/mK, đ=8.4x10-5m-/s) of 11 cm on each side is initially at a temperature of 400° C. It is suddenly immersed in a tank of oil maintained at 85°C. The convection coefficient is 1100 W/m2 K. Determine the temperature at the center of one face after a time of 1 min by Heisler chart.
Question 1: Question 2: 1 point A liquid at temperature F is placed in an oven at temperature oven. Write a differential equation for the temperature Tit) of the liquid. 0 The temperature of the liq...
Question 1:
Question 2:
1 point A liquid at temperature F is placed in an oven at temperature oven. Write a differential equation for the temperature Tit) of the liquid. 0 The temperature of the liquid increases at a rate times the difference between the temperature of the liquid and that of the T(0) Note: use TT', etc instead of T(t), T'(t) in your answers. After you set up your differential equation you will have to set it equal to...
We wish to estimate the dynamics of a cold thermo-couple probe suddenly placed in a hot...
We wish to estimate the dynamics of a cold thermo-couple probe suddenly placed in a hot flowing fluid stream for the purpose of temperature measurement. The probe consists of two dissimilar metal wires joined by soldering at the tip, and the wires are then encased in a metal sheath and the tip is finally coated with a bead of plastic to protect it from corrosion. Take the mass of the soldered tip plus plastic head to be m, with specific...
QUESTION: A thermometer is initially at a temperature of with a temperature of 180 F The time constant of the ther a temperature of 75 Fis suddenly immersed into a tank of water a) What temperature will the thermometer read after 4s? b) W hat is the90%) esponse time in seconds? (ie. time at which change in output will be 90% of maximum change) c) At what time in seconds will the reading on the thermometer be (10 F
A thermometer reading 8°C is brought into a room with a constant temperature of 35°C (a) If the thermometer reads 15°C after 2 minutes, what will it read after being in the room for 4 minutes? For 9 minutes? b) Graph the relation between temperature and time. Use TRACE to verify that your answers are correct. A pizza baked at 450°F is removed from the oven at 6:00 PM into a room that is a constant 73oF. After 5 minutes,...
1. A force F(t) is suddenly applied to a mass m, which is supported by a spring with a constant k After a short period of time r, the force is suddenly removed. During the time the force is active, it is a constant Determine the response of the system for t> τ. The spring and mass are initially at rest before the force F() is applied. (a) Use the convolution integral. (b) Use the Laplace Transform. (c) what values...
3. A large, 5-cm thick plate of pure aluminum initially at a uniform temperature of 200°C is suddenly exposed to a convection environment in which the fluid temperature is 50°C and the heat- transfer coefficient is 1200 W/ m K. Calculate the temperature of the plate at a depth of 1.5 cm from one of the surfaces after 3 min. How much heat is lost from the plate during this time? Ans: Tplate = plane
Example 5 • A cube (k=204W/mK, đ=8.4x10-5m-/s) of 11 cm on each side is initially at a temperature of 400° C. It is suddenly immersed in a tank of oil maintained at 85°C. The convection coefficient is 1100 W/m2 K. Determine the temperature at the center of one face after a time of 1 min by Heisler chart.
Question 1:
Question 2:
1 point A liquid at temperature F is placed in an oven at temperature oven. Write a differential equation for the temperature Tit) of the liquid. 0 The temperature of the liquid increases at a rate times the difference between the temperature of the liquid and that of the T(0) Note: use TT', etc instead of T(t), T'(t) in your answers. After you set up your differential equation you will have to set it equal to...
We wish to estimate the dynamics of a cold thermo-couple probe suddenly placed in a hot flowing fluid stream for the purpose of temperature measurement. The probe consists of two dissimilar metal wires joined by soldering at the tip, and the wires are then encased in a metal sheath and the tip is finally coated with a bead of plastic to protect it from corrosion. Take the mass of the soldered tip plus plastic head to be m, with specific...
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