What type of heat transfer occurs when you TOUCH a metal box with your hand and the metal box feels cold? convection conduction radiation evaporation
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What type of heat transfer occurs when you TOUCH a metal box with your hand and the metal box feels cold?
convection
conduction
radiation
evaporation
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- A 1-kg block of sub-zero ice is dropped into a large drum of cold water at 0 C. The drum is insulated from outside. Immediately after dropping it, you measured that the ice-block is gaining heat from the water at a rate of 126 W. How much time will it take for all the ice to melt? (no more information is required)Why do fishermen sail out to the sea in the night? What process helps them to sail easily to the sea in the night and come back to the shore in the morning? think about processes like conduction, convection and radiationIn the table below for E106, which of the following is the amount of heat lost by the metal specimen when dropped in the calorimeter with water? TRIAL 1 Determining the Specific Heat of Metal Specimen Metal Specimen 1 Mass of calorimeter, me Mass of calorimeter with water Mass of water, mi Mass of metal specimen, mm Initial temperature of metal, tom Initial temperature of calorimeter, toc Initial temperature of water, tow Final temperature of the mixture, tmix Specific Heat of Water cw Specific Heat of calorimeter ce Experimental specific heat of metal, cm Actual specific heat of metal, cm Percentage Error O 699 cal O 212 cal O 675 cal O 488 cal 150.0 g 225.0 g 8 100.0 g 100°C 20.0°C 20.0°C 26.5°C 1.0000 çal/gC 0.2174 cal/gC cal/gC 0.0917 cal/gC %
- 46Two isolated systems with different temperatures are connected via long metal rod . The metal rod conducts heat between the two systems at a rate of 50 cals/s what will happen to the rate of the heat flow if the length of the metal rod is elongated 3 times the original distance as well as increasing the cross- sectional diameter by 3 times ? Round to one decimal placeExample: Ice-cold Lemonade Ice at 0°C is placed in a Styrofoam cup containing 0.32 kg of lemonade at 27°C. The specific heat capacity of lemonade is virtually the same as that of water. After the ice and lemonade reach and equilibrium temperature, some ice still remains. Assume that mass of the cup is so small that it absorbs a negligible amount of heat. (@b_² = SMAD)+¹=² Heat lost by lemonade Heat gained by ice
- After a short walk a student has lost 230 kcal of heat thanks to the evaporation of 418g of water through his skin. Recalling that 1 kcal = 4180J What is the latent vaporization of water? heat of CA A) 2300 cal/kg B 2300 J/kg с) 2300 кто /ид D) 2300 kcal/kg 30 kJ / kg E230Use Newton's Law of Cooling