Homework Answers
3). Power is defined as work done per unit time.
Power = (energy/time)
Power = (5/100×10^-3)
Power = 50 watt.... option B is correct answer.
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2. Separate from problem #1, we transfer 5 Joules into the internal energy of the pin,...
For this problem we consider a radiant heat transfer system commonly found in space/room heaters. The input to the plan...
For this problem we consider a radiant heat transfer system commonly found in space/room heaters. The input to the plant is (heat) energy q(Watts) and the output of the system is its temperature (K). The ODE that describes the system is given below Where, 8a is the ambient temperature (27°C), b-91.6 is an input constant, m 0.1 kg is the mass, C 420 J/Kg.K is the specific heat of the heater and a-AEo. A0.25 m2 is the surface area of...
2) Planet Velocities and Energy (10 pts) We talked about how planet formation involves the collisions...
2) Planet Velocities and Energy (10 pts) We talked about how planet formation involves the collisions of bodies (planetesimals, embryos) leading to the growth (and heating) of a planet. Let's think about the velocities and energies involved here. a) The speed of a body in its orbit around the Sun is given by the equation V2= GM.[(2/r) - (1/a)] Here Vis the speed of the body in m/s, G is the gravitational constant, M. is the mass of the Sun...
9:484 Back Specific Heat Chpt3.docx Heat Capacity 1) How many Joules of energy are required to...
9:484 Back Specific Heat Chpt3.docx Heat Capacity 1) How many Joules of energy are required to raise 15g of aluminum from 30 C to 100°C? Given the heat capacity of Aluminum is 0.903 Jig C 2) If 6093 cal of energy is added to some pure substance. If the temperature went from 10°C to 50°C, how many grams of the substance was present. Given the of the substance is 2.45cal/g C 3) If 4x10* J of energy is added to...
I asked this before, but the other person got the wrong answer. I tried to solve...
I asked this before, but the
other person got the wrong answer. I tried to solve what they did
wrong to get my answers correct, but to no avail. Please help
me.
(10%) Problem 9: A certain pond absorbs I 910 WIm for a time period of an hour from the sun. Assume that all of this energy is used to raise the temperature of the pond. The pond water fills a hemisphere of radius r 1.75 m and has...
Question 5 The rotational energy levels of a diatomic molecule are given by E,= BJ(J+1) with...
Question 5 The rotational energy levels of a diatomic molecule are given by E,= BJ(J+1) with B the rotational constant equal to 8.02 cm Each level is (2) +1)-times degenerate. (wavenumber units) in the present case (a) Calculate the energy (in wavenumber units) and the statistical weight (degeneracy) of the levels with J =0,1,2. Sketch your results on an energy level diagram. (4 marks) (b) The characteristic rotational temperature is defined as where k, is the Boltzmann constant. Calculate the...
Just need a little help figuring out how to make the calculations from my data Data...
Just need a little help figuring out how to make the calculations
from my data
Data and Calculations 1. Determining the calorimeter constant Data % 8 (a) Mass of empty Styrofoam cups (b) Mass of cups + 70 ml water (c) Mass of cups + 70 ml water + 30 ml hot water (d) Initial temperature of water in the calorimeter (cups) (e) Temperature of the boiling water bath Trial 1 20.5 86.6 1 113.6 23 95 39 Trial 2...
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C,...
I will rate. Thanks so much
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C, when it is suddenly quenched by dipping it in a liquid bath of temperature To Heat transfer to the liquid is characterized by the convection coefficient h. Assume x = 0 corresponds to the midplane of the wall -20°C (a) If h = 100 w/m2, K, what is the heat flux atx = L and t = 0?...
be clear Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat...
be clear
Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85°C. The heating is to be accomplished by passing hot engine oil at a rate of 5.2 kg/s, which is available at 160°C, through the shell side of the exchanger. The oil is known to provide an average convection coefficient of 400 W/m2K on the outside of the tubes. Ten tubes passes the water through the shell....
1) 2) 3) PROJECT #1 (2.5 Marks): The heat that is conducted through a body must...
1)
2)
3)
PROJECT #1 (2.5 Marks): The heat that is conducted through a body must frequently be removed by other heat transter processes. For example, the heat generated in an electronic device must be dissipated to the surroundings through convection by means of fins. Consider the one-dimensional aluminum fin (thickness t 3.0 mm, width Z 20 cm, length L) shown in Figure 1, that is exposed to a surrounding fluid at a temperature 1. The conductivity of the aluminum...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun,...
For this problem we consider a radiant heat transfer system commonly found in space/room heaters. The input to the plant is (heat) energy q(Watts) and the output of the system is its temperature (K). The ODE that describes the system is given below Where, 8a is the ambient temperature (27°C), b-91.6 is an input constant, m 0.1 kg is the mass, C 420 J/Kg.K is the specific heat of the heater and a-AEo. A0.25 m2 is the surface area of...
2) Planet Velocities and Energy (10 pts) We talked about how planet formation involves the collisions of bodies (planetesimals, embryos) leading to the growth (and heating) of a planet. Let's think about the velocities and energies involved here. a) The speed of a body in its orbit around the Sun is given by the equation V2= GM.[(2/r) - (1/a)] Here Vis the speed of the body in m/s, G is the gravitational constant, M. is the mass of the Sun...
9:484 Back Specific Heat Chpt3.docx Heat Capacity 1) How many Joules of energy are required to raise 15g of aluminum from 30 C to 100°C? Given the heat capacity of Aluminum is 0.903 Jig C 2) If 6093 cal of energy is added to some pure substance. If the temperature went from 10°C to 50°C, how many grams of the substance was present. Given the of the substance is 2.45cal/g C 3) If 4x10* J of energy is added to...
I asked this before, but the
other person got the wrong answer. I tried to solve what they did
wrong to get my answers correct, but to no avail. Please help
me.
(10%) Problem 9: A certain pond absorbs I 910 WIm for a time period of an hour from the sun. Assume that all of this energy is used to raise the temperature of the pond. The pond water fills a hemisphere of radius r 1.75 m and has...
Question 5 The rotational energy levels of a diatomic molecule are given by E,= BJ(J+1) with B the rotational constant equal to 8.02 cm Each level is (2) +1)-times degenerate. (wavenumber units) in the present case (a) Calculate the energy (in wavenumber units) and the statistical weight (degeneracy) of the levels with J =0,1,2. Sketch your results on an energy level diagram. (4 marks) (b) The characteristic rotational temperature is defined as where k, is the Boltzmann constant. Calculate the...
Just need a little help figuring out how to make the calculations
from my data
Data and Calculations 1. Determining the calorimeter constant Data % 8 (a) Mass of empty Styrofoam cups (b) Mass of cups + 70 ml water (c) Mass of cups + 70 ml water + 30 ml hot water (d) Initial temperature of water in the calorimeter (cups) (e) Temperature of the boiling water bath Trial 1 20.5 86.6 1 113.6 23 95 39 Trial 2...
I will rate. Thanks so much
Supplemental Problem 2.003 A large plate of thickness 2L is at a uniform temperature of Tỉ-190°C, when it is suddenly quenched by dipping it in a liquid bath of temperature To Heat transfer to the liquid is characterized by the convection coefficient h. Assume x = 0 corresponds to the midplane of the wall -20°C (a) If h = 100 w/m2, K, what is the heat flux atx = L and t = 0?...
be clear
Problem 3 (60 Points). A 1-2 shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85°C. The heating is to be accomplished by passing hot engine oil at a rate of 5.2 kg/s, which is available at 160°C, through the shell side of the exchanger. The oil is known to provide an average convection coefficient of 400 W/m2K on the outside of the tubes. Ten tubes passes the water through the shell....
1)
2)
3)
PROJECT #1 (2.5 Marks): The heat that is conducted through a body must frequently be removed by other heat transter processes. For example, the heat generated in an electronic device must be dissipated to the surroundings through convection by means of fins. Consider the one-dimensional aluminum fin (thickness t 3.0 mm, width Z 20 cm, length L) shown in Figure 1, that is exposed to a surrounding fluid at a temperature 1. The conductivity of the aluminum...
(33%) Problem 3: Warm blooded animals are home otherm that is, they maintain an approximately constant body temperature. (For humans it's about 37°C.) When they are in an environment that is below their optimum temperature, they use energy derived from chemical reactions within their bodies to warm them up One of the ways that animals lose energy to their environment is through radiation. Every object emits electromagnetic radiation that depends on its temperature. For very hot objects like the sun,...
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