Question
Why is heat energy needed to melt a solid? What is this heat energy called?
✓
Answer
When a solid is heated, the heat energy makes its particles vibrate more vigorously. At the melting point, the particles of solid have sufficient energy to overcome the strong forces of attraction holding them in fixed positions and break to form small groups of particles. This heat energy is kinetic energy.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A $\frac{1}{2}\text{kg}$ sheet of tin sinks in water but if the same sheet is converted into a box or boat, it floats. Why?
→How can poultry and fish farming help in solving the food and nutrition problem?
- Identify the above figure.
- Label X and Y.
- What is the function of X?
Give the merits and demerits of fish culture?
Why antibiotics effective against bacteria but not against viruses?
When is the work done by a force on a body: (a) positive, (b) negative, and (c) zero?
A body travels a distance of 3km towards East, then 4km towards North and finally 9km towards East.
- What is the total distance travelled?
- What is the resultant displacement?
The distance of a planet from the sun is 40 times that of the earth. What is the ratio of their time periods of revolution around the sun?
A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.
What is the function of bone, cartilage and ligament?