Continuation:Problem 8:How much time is needed to boil a1kg water @ 20°C using a 1kW electrickettle? If the rate of electricity isP15/kWh, how much is the cost youincurred in boiling this amount ofwater?

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Answered: How much time is needed to boil a 1kg…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter10: Thermal Physics

Section: Chapter Questions

Problem 22P: A construction worker uses a steel tape to measure the length of an aluminum support column. If the...

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A construction worker uses a steel tape to measure the length of an aluminum support column. If the measured length is 18.700 m when the temperature is 21.2C, what is the measured length when the temperature rises to 29.4C? Note: Dont neglect the expansion of the tape.
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What convert 77° f into kelvins conversion formulas c°= ( F-32°)÷1.8 F° =1.8×C°+32° K = C°+273
1. If the viscosity of the fluid will increase, the rate of heat transfer will A.decrease B. There is no relationship between viscosity and rate of heat transfer c.remains the sam d.increase 2. In a series resistances at a point a. Rate of heat transfer are equal b. Resistancesare equal C. Heat transfer coefficient are equal d.temperature gradient are equal 3. The variable having the greatest influence on total cost in the design of the evaporator is the ___________ a.amount of steam used b.number of effects c.pumping cost d.volume of feed
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Answer the following. (a) How much energy is necessary to heat 2.0 kg of water from room temperature (20°C) to its boiling point? (Assume no energy loss.)kcal(b) If electrical energy were used, how much would this cost at 15¢ per kWh?
A walrus transfers energy by conduction through its blubber at the rate of 150 W when immersed in −1.00ºC water. The walrus’s internal core temperature is 37.0ºC , and it has a surface area of 2.00 m2 . What is the average thickness of its blubber, which has the conductivity of fattytissues without blood?

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How much time is needed to boil a 1kg water @ 20°C using a 1kW electric kettle? If the rate of electricity is P15/kWh, how much is the cost you incurred in boiling this amount of water?