For Questions 3 and 4: A cup of water was heated to a temperature of 90°. It was placed in a refrigerator that had a temperature of 11°C. The water cooled to a temperature of 17°C in 30 minutes. Let the following variables represent the relevant quantities. L = Temperature of the liquid S= Temperature of the surroundings t = Time B = Initial temperature of the liquid (Temperature at t = 0 k = Cooling constant - Using the Equation Solver, find the value of k in the equation L = (B - S)e -k ·t + S. Remember to set the equation equal to zero and then enter it into the Solver.

For Questions 3 and 4: A cup of water was heated to a temperature of 90°. It was placed in a refrigerator that had a temperature of 11°C. The water cooled to a temperature of 17°C in 30 minutes. Let the following variables represent the relevant quantities. L = Temperature of the liquid S= Temperature of the surroundings t = Time B = Initial temperature of the liquid (Temperature at t = 0 k = Cooling constant - Using the Equation Solver, find the value of k in the equation L = (B - S)e -k ·t + S. Remember to set the equation equal to zero and then enter it into the Solver.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.22P: 1.22 In order to prevent frostbite to skiers on chair lifts, the weather report at most ski areas...

See similar textbooks

Similar questions

THERMODYNAMICS UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS/DIAGRAMS LEGIBLY. NO LONG EXPLANATION NEEDED. USE 3 DECIMAL PLACES. BOX THE FINAL ANSWER. An airplane is cruising at an elevation of 35,000 feet from sea level. Determine the amount of gage pressure in bars needed to pressurize the airplane to simulate sea level conditions. The average atmospheric pressure on earth is mated as a function of altitude by the relation Patm = 101.325 (1- 0.02256z)5.256, where Patm is the atmospheric pressure in kPa and z is the altitude in km with z = 0 at sea level.
THERMODYNAMICS UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS/DIAGRAMS LEGIBLY. NO LONG EXPLANATION NEEDED. USE 3 DECIMAL PLACES. BOX THE FINAL ANSWER. A pump discharges into a semi spherical tank at the bottom and cylindrical on top with a radius of 2 meters, and a total tank height of 8 meters. The flow rate is 80 gallons per minute and fluid specific gravity= 1.1. Determine the following: A) flow rate in kg/sec and time it takes to fill the tank in hours. Flow Rate and Time
Please provide equations that you are using so I can follow along and learn how to do this and include conversions and units. In Jamestown, NY, a coal power plan consumes coal at a rate of 80 tons/hr. When coal burns, it generates approximately 30,000 kJ for every kg of coal burned. The cooling course for the plant is the nearby Chadakoin River nearby and, by code, the power plant cannot reject more than 13.19 x 109 MJ into the river annually. Determine the maximum average power output of this plant and it's maximum thermal efficiency. To check your work, enter the efficiency, as a decimal, in the box provided.
MECHANICAL ENGINEERING UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. SHOW THE STEP-BY-STEP PROCESS WITH SHORT COMMENT/EXPLANATION. ANSWER IN 4 DECIMAL PLACES. Two gaseous streams containing the same fluid enters a mixing chamber and leaves as a single stream. For the first gas the entrance conditions are A1=500 cm², v1=230 m/s, p1=1.60 kg/m³. For the second gas the entrance conditions are A2= 300 cm³, m2=8.84 kg/s, v2=0.502 m³/kg. The exit stream conditions is v3=130 m/s and v3=0.437 m3/kg. Determine the following: (a) the total mass flow leaving the chamber (kg/sec) (b) the velocity of the gas at 2. (m/sec)
Solve the following problems.Show your correct and complete solution for this problem. Box your final answers and express in two decimal places.Sketch the schematic diagrams. Initially, a rigid tank contains 500L of water at 300°C. By volume, the tank contains60% liquid and 40% vapor. At the bottom of the tank, as shown, a valve is opened and half of the mass of water is withdrawn which is in the liquid phase. Heat transfer takes place such that the temperature within the tank is constant. Determine the heat transfer in kJ required to withdraw half of its mass and maintain its temperature.
In the experiment shown in the graph, different amounts of thermal energy were used to heat an object made of lead and the resulting temperature was measured. The specific heat capacity of lead is 0.105 calories per gram degree Celsius [calg∘C]. What was the weight of the lead object tested in the experiment, in units of pound-force [lbf]?
1-heat is defined as the average kinetic energy of the atoms and molecules that make up a substance and temperature is the amount of thermal energy transported2- heat is defined as the total kinetic energy of the atoms and molecules that make up a substance and temperature is the transport of pressure energy due to the temperature gradient3- Heat is defined as the average kinetic energy of the atoms and molecules that make up a substance and temperature is a measure of the equivalent kinetic energy of the individual molecules or atoms4- Heat is defined as the total kinetic energy of the atoms and molecules that make up a substance and temperature is a measure of the total kinetic energy of the individual molecules or atoms5- Heat is defined as the total kinetic energy of the atoms and molecules that make up a substance and temperature is a measure of the average kinetic energy of the individual molecules or atoms choose only one of the above alternatives as correct
A mercury thermometer, which has been on a table for some time, is registering the room temperature, 50°F. Suddenly, it is placed in a 395°F oil bath. The following data are obtained for the response of the thermometer. If after 10 seconds the thermometer reading is 176 F, determine the thermometer time constant. Round off the final ans to whole number Please show your complete solution and write readable.
You own a wheat warehouse with a capacity of 20,000bushels. At the beginning of month 1, you have 6,000 bushels of wheat. Each month, wheat can be bought and sold at theprice per 1000 bushels given in Table 46.The sequence of events during each month is as follows:a You observe your initial stock of wheat.b You can sell any amount of wheat up to your initialstock at the current month’s selling price.c You can buy (at the current month’s buying price) asmuch wheat as you want, subject to the warehouse sizelimitation.Your goal is to formulate an LP that can be used to determine how to maximize the profit earned over the next 10months
Posted below is a picture of a data table and a diagram of an experiment. In the experiment you rolled a marble down a ruler ramp off the end of a coffee table to observe projectiles and conservation of energy. You do 3 trials for each initial height. Each height is measured in meters. h= initial height of marble off of table Y= height of table off floor X= horizontal distance marble goes from edge of table to where it strikes the floor a) use the table to find information you need to solve for theoretical range and % of error in measured range.
Completely solve and box the final answer. Write legibly. 10. An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The outside diameter of the pipe is 82 mm, and its surface temperature and emissivity are 200°C and 0.80 respectively. If the coefficient associated with free convection heat transfer from the surface to the air is 15W/m2-k, what is the rate of heat loss for a 5 meter pipe? Round the answer in 2 decimals.
Completely solve and box the final answer. Please show the units to show the unit cancellations. Write legibly 2. During a steady flow process, the pressure of the working substance drops from 1,380 kpa to 138 kpa, the speed increases from 61 m/s to 305 m/s, the internal energy of the open system decreases 58.1 KJ/kg, and the specific volume increases from 0.0625 m3/kg to 0.5 m3/kg. No heat is transferred, determine the work in KW if the mass flow at the rate of 272.15 kg/hr.