Outside of cooking utensils are generally left black from below because
A). It is difficult to clean daily.
B). Black surface is a good conductor of heat.
C). Black surface is a poor conductor of heat.
D). Black surface is a good absorber of heat.
Black surface is a good absorber of heat.
The outside surface of a utensil used for heating is coated black so that it may absorb more heat and make heating quicker. This is because black surface is a good absorber of heat.
2. The SI unit of acceleration is _______________.
3. A vacuum cleaner works on the principle of pressure difference. On the moon it will
4. Rate of work done is _______.
6. The frequency of direct current is _____________
7. The sky appears blue due to
8. Global warming is expected to result in -
9. For a body moving with no uniform velocity and uniform acceleration
10. The distance between node and adjacent antinodes is 30 cm. The wavelength is