An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. what minimum power must be generated if 210 g water (enough for 1 cup of coffee) is to be heated in 14.0 min from 26.0°c to 84.0°c? (1 cal = 4.186 j, the specific heat of water is 4 186 j/kg⋅°c)

minimum Power = 60.69 watts

Explanation:

Step1

Energy required to heat water = m*C* \DeltaT

= 210* 4.186* [ 357-299]

=210x 4.186 x 58 J

= 50985.48 J

Step2

Work done = 50985.48 J

Step3

Time taken = 14 min = 840 seconds

Step4

minimum Power ==   60.69 watts

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

volts times amps 6 x 0.5 3w