Physics

Physics, 17.11.2019 20:31, pal23

Why does water rise after passing over the heating element

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Chemistry, 05.07.2019 18:20, jocko1224

A2-quart steel pan, 10" in diameter with a wall thickness of 1.11 mm is filled with water at 22.2 °c and placed on an electric heating element on the stove top. the electric heating element is a coil about 5' long and 1.55 cm wide. -how many moles of water is this? how many molecules? what is the mass of the water? illustrate the problem. ree what is the initial heating rate of the water if the heating element is at 600 °c? if the average heating rate is one half of the initial rate, how long would it take to bring the water to the boiling temperature? s eh doads oflos t ea tsisolov lenoalant ai sd blrow ted a what would be the change in depth of the water in the pan due to this heating? sns a a arg o hamans inotat ba bas aslzesm beslet you boil all the water off into steam, how much time would it take?

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Chemistry, 24.08.2019 03:10, drainy0uandthefish

In an electrically heated boiler, water is boiled at 140°c by a 90 cm long, 8 mm diameter horizontal heating element immersed in water. the heating element is made of mechanically polished stainless steel. the boiler initially contains 0.25 m of water at 20°c. once boiling starts, it is observed that 25% of the water in the boiler evaporated in 60 min. i. determine the power rating of the electric heating element immersed in water and the surface temperature of the heating element. [8 marks] ii. using the above heater, estimate the time required to raise the temperature of 0.25 m2 of cold water from 20°c to 140°c

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Physics, 06.10.2019 06:30, BreBreDoeCCx

Water is boiled in a 1-l coffee maker with an immersion-type electric heating element at atmospheric pressure. it was observed that ½-l has evaporated in 13 min once boiling starts. a) if the heating element is rated based on power required to evaporate water, determine the rating of the heating element. b) for the same heating element, how long will it take to raise the 1-l temperature from 18 oc to boiling point at the same atmospheric pressure? take liquid water density air = 1000 kg/m3 & specific heat cpwater = 4.18 kj/(kg.ok).

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Chemistry, 16.10.2019 22:00, caitlynnpatton1208

Water is boiled in a 1-l coffee maker with an immersion-type electric heating element at atmospheric pressure. it was observed that 12-l has evaporated in 13 min once boiling starts. a) if the heating element is rated based on power required to evaporate water, determine the rating of the heating element. b) for the same heating element, how long will it take to raise the 1-l temperature from 18 °c to boiling point at the same atmospheric pressure? take liquid water density pair = 1000 kg/m & specific heat pwater = 4.18 kj/(kg: "k).

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