Advertisements
Advertisements
प्रश्न
A body radiates out 300 calories of heat energy. How much heat energy is radiated out by the body in joules?
Advertisements
उत्तर
Heat energy radiated by the body = Q = 300 Cal
As 1 cal = 4.2 J
Q = 300 Cal = 300 × 4.2 J
Q = 1260 J
APPEARS IN
संबंधित प्रश्न
Fill in the blank
The temperature of a normal human body is ________.
What is evaporation? Why does it cause cooling?
Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.
Where am I?
The isotherm 0°C runs in my surroundings.
When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?
Temperature is related to how fast the atoms within a substance are moving.
For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between 35°C to 40°C. At places, where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.
Match the following:
| Column-I | Column-II | |
| 1. | Temperature | Beam balance |
| 2. | Mass | Ruler |
| 3. | Length | Digital clock |
| 4. | Time | Thermometer |
