59. To help prevent frost damage, fruit growers sometimes protect theircrop by spraying it with water when overnight temperatures are expectedto go below freezing. When the water turns to ice during the night, heatis released into the plants, thereby giving a measure of protection againstthe cold. Suppose a grower sprays 7.2 kg of water at 0 °C onto a fruit tree.(a) How much heat is released by the water when it freezes? (b) Howmuch would the temperature of a 180-kg tree rise if it absorbed the heatreleased in part (a)? Assume that the specific heat capacity of the tree is

Part A) Calculate heat lost by water when it freezes to zero degrees Celcius.

Answered: 59. To help prevent frost damage, fruit…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

b) For an Otto Engine the temperature at the end of combustion is 280 K. If the temperature in the gas side and coolant side of the wall are 177 °C and 127 °C and cylinder wall thickness is 5 mm;
Latent heat of fusion is the heat given up as a substance freezes. The latentheat of fusion for water is 144 British thermal units per pound (Btu/lb). Thismeans that 144 Btu are given up for each pound of water that freezes. Howmany British thermal units of heat are given up when 4,000 pounds of waterfreeze?
Unreasonable Results - A slightly deranged Arctic inventor surrounded by ice thinks it would be much less mechanically complex to cool a car engine by melting ice on it than by having a water-cooled system with a radiator, water pump, antifreeze, and so on. (a) If 80% of the energy in 1.00 gal of gasoline is converted into “waste heat” in a car engine, how many kilograms of 0C ice could it melt? (b) Is this a reasonable amount of ice to carry around to cool the engine for 1.00 gal of gasoline consumption? (c) What premises or assumptions are unreasonable?
How much ice (by mass) at a temperature of -19.9 degrees Celsius must be added to 325g of liquid water at a temperature of 60.1 degrees Celsius in order for the final temperature of both to reach 21 degrees Celsius. c of ice=2100 J/kg/C c of water=4190 J/kg/C Latent heat of fusion of water=3.34E5 J/kg/C a. .115kg b. 12kg c. 5 lbs d. .191kg
Q3) On a hot summer day, a student turns his fan on when he leaves his room at 9.00 am. When he returns at 1.00 pm, will his room be warmer or cooler than the neighboring rooms? Why? Assume all the doors and windows are kept closed.
Assume the following: ●In a light water reactor, approximately 1.0kg of spent nuclear fuel is produced for every50. megawatt-days (MWd) of thermal energy input. ●For the purposes of this analysis, assume the spent nuclear fuel produced is 1.8% Pu-240by mass. Pu-240 has a half-life of 6,430 years. ●The thermal efficiency of the power plant is 38% ●Use equation for radioactive decay: Qt= Q0^e-kt where: ○Qt = quantity of radioactive material at time t ○Q0 = original quantity of radioactive material ○k = the decay constant ○t = time interval in years ○The decay constant k is defined by the relation: Half life = ln(2)/k Diablo Canyon stores 95% of its spent nuclear fuel onsite. ii) How many metric tons of Pu-240 in the spent fuel will still be onsite in that year?
Mollier diagram determines the .1 - relationships between -- none of these answers. O different refrigerant types. pressure and enthalpy. O temperature, moisture, energy efficiency, air density, volume and heat content. thermal quantities. O
Air treated as an ideal gas and having a specific heat at constant volume Cv=1200 J/kg.K undergoes a process. During this process, heat is observed to exit the system with an amount of 10 kJ while work is provided to the system with an amount of 28 kJ. If the initial temperature of air was 20 C, what is the final temperature of air if the mass of air undergoing the process is 0.7 Kg. Select one: O a. 35.5 C O b. 52.4 C c. 41.4 C O d. 29.5 C
Pls.answer thank you! A classroom that normally contains 40 people is to be air-conditioned with window air-conditioning units of 5 KW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of about 360 KJ/hr. There are 10 light bulbs in the room, each with a rating of 100 watts. The rate of heat transfer to the classroom through the walls and the windows is estimated to be 15,000 KJ/hr. If the room air is to be maintained at a constant temperature of 21°C, determine the number of window air-conditioning units required.
If you live in a winter-kind weather condition area what recommendation to the residents that they need to apply to avoid the freezing of their water supply during the winter season?
You witness an industrial fire in which an unknown liquid spilled in to a 8.2 feet diameter circular dike. You were told the tank holding the liquid spilled its entire content of 3,180 kg in to the dike. The fire started and burned for 30 minutes before consuming all the fuel. If the fire had a heat release rate of 50.5 MW what is the chemical heat of combustion of the fuel?
bliuzodt to mopolb 9. If machine parts are degreased by means of kerosene as shown in the diagram, how much kerosene make-up is needed per day? How much kerosene has to enter the degreasing vat per day? There are about 3 lb of grease per 100 lb of machine parts, and 60 tons of machine parts are processed each day. Five thousand pounds of kerosene (the 10% solution) are carried away by the machine parts each day but drip off and are caught and put back in the degreasing vat. Two hundred pounds of the 10% solution are lost each day from the vat by evaporation, spillage, or by being carried away.

SEE MORE QUESTIONS

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS