What is dry ice??
Define work power and energy and write their unit also.
samyuktha64:
1kwh=1000 Watts for 1 hrs
power is defined as the time rate of doing work. when the time taken to complete a given amount of work is important we measure the power of the agent doing work
p=w/t
units of power is watt
watt= joule /sec
1 kilo watt=1000 watts
other unit for power is horse power
1hp=746watts
=o. 746 kW or 1kw =1/o.746 hp=1.34hp
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dry ice is solid form of carbon dioxide
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Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods where mechanical cooling is unavailable.
Dry ice sublimates at 194.65 K (−78.5 °C; −109.3 °F), at Earth atmospheric pressures. This extreme cold makes the solid dangerous to handle without protection due to burns caused by freezing (frostbite). While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to buildup in confined locations.
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Dry ice sublimates at 194.65 K (−78.5 °C; −109.3 °F), at Earth atmospheric pressures. This extreme cold makes the solid dangerous to handle without protection due to burns caused by freezing (frostbite). While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to buildup in confined locations.
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