ANSWER THE FOLLOWING:
1. Convert 298 K to °F.
2. i. Define one calorie.
ii. 1 J = _______ cal.
3. Cooking utensils are provided with ebonite handle. Explain.
4. What do you observe when two thermometers, one with a shining bulb and another one with a blackened bulb, are kept in sunlight? Explain your observation.
I will mark the first answer, if correct, as Brainliest.
Answers
Answer:
Answer 1) Answer:
Convert 298 K to °F.
=by subtracting 273
so it will be 25°C
now the formula
F =C×9/5+32
45+32=77F
2 (i) 4184 joules
(ii) 0.000239 kilocalorie
3. Cooking utensils are provided with ebonite handle. Explain.
=Cooking utensils are provided with handles of bad conductors of heat such as ebonite or wood to hold them as the handles of these materials do not allow heat to pass from utensil to our hand.
4. The thermometer A which is painted black will show a high temperature that is more than that of thermometer B. b.) Hence, we can conclude that the dull black surface is a good absorber of heat than any bright shiny surface. Any dark colour is a good radiator of heat and hence will become hotter than the other one.
Answer:
Convert 298 K to °F.
=by subtracting 273
so it will be 25°C
now the formula
F =C×9/5+32
45+32=77F
2 (i) 4184 joules
(ii) 0.000239 kilocalorie3. =Cooking utensils are provided with ebonite handles which are bad Conductor of heat. Ebonite handles don't allow electricity to pass to any medium. This is the reason why cooking utensils are provided with ebonite handles.
4= When we placed two concave mirrors of tin, of nine inches focus, at the distance of twelve feet we observe, that a thermometer with its bulb blackened stands higher than one which has shining bulb.