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1. Atank containing 20kg of water at 20C° is fitted with a stirrer that delivers work to the water at the rate of 0.25 KW. How long does it take for the temperature of the water to raise to 30C° if no heat is lost from the water? For water CP-4.18 KI/Kg.Co 1.

1. Atank containing 20kg of water at 20C° is fitted with a stirrer that delivers work to the water at the rate of 0.25 KW. How long does it take for the temperature of the water to raise to 30C° if no heat is lost from the water? For water CP-4.18 KI/Kg.Co 1.

Elements Of Electromagnetics
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
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a. Experiences a temperature increase of 1 K". What is AUt in KJ? b. Experiences a change in elevation Az. the change in potential C. Is accelerated from rest to final velocity u. the change in kinetic energy A EK is the same as AUt for part (a). What is u. i energy A Ep is the same as A Ut for part (a), what is Az, in meters? mpar Thermodynamics 25 TUT(3) 1. Atank containing 20kg of water at 20C° is fitted with a stirrer that delivers work to the water at the rate of 0.25 KW. How long does it take for the temperature of the water to raise to 30C° if no heat is lost from the water? For water CP=4.18 KJ/Kg.C° 1. 2. A steel casting weighting 2 kg has an initial temperature of 500 Co; 40 kg of water initially at 25 C° is contained in a perfectly insulated steel tank weighting 5 kg. The casting is immersed in the water and the system is allowed to come to equilibrium. What is final temperature? Ignore effects of expansion or contraction. And assume constant specific heats of 4.18 KJ/Kg-1 .K° for water and 0.5 KJ/Kg .K°-1 for steel. 3. One kg of liquid water at 25 co. 2-TW in ms?. MSMADT
Transcribed Image Text:a. Experiences a temperature increase of 1 K". What is AUt in KJ? b. Experiences a change in elevation Az. the change in potential C. Is accelerated from rest to final velocity u. the change in kinetic energy A EK is the same as AUt for part (a). What is u. i energy A Ep is the same as A Ut for part (a), what is Az, in meters? mpar Thermodynamics 25 TUT(3) 1. Atank containing 20kg of water at 20C° is fitted with a stirrer that delivers work to the water at the rate of 0.25 KW. How long does it take for the temperature of the water to raise to 30C° if no heat is lost from the water? For water CP=4.18 KJ/Kg.C° 1. 2. A steel casting weighting 2 kg has an initial temperature of 500 Co; 40 kg of water initially at 25 C° is contained in a perfectly insulated steel tank weighting 5 kg. The casting is immersed in the water and the system is allowed to come to equilibrium. What is final temperature? Ignore effects of expansion or contraction. And assume constant specific heats of 4.18 KJ/Kg-1 .K° for water and 0.5 KJ/Kg .K°-1 for steel. 3. One kg of liquid water at 25 co. 2-TW in ms?. MSMADT
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