The concave mirror is a spherical-shaped mirror that has an inner curved surface. Hence, option (4) is correct.
What is a concave mirror?
The concave mirrors are spherical-shaped mirrors that are painted on the outward surface. It is also known as the converging mirror, having the recessed inner reflecting surface.
- The concave mirrors are generally used for the purpose to focus the light. For that, they might have a reflecting surface, curved inwards, and the reflection of light is limited to the single focal point.
- The reflecting surface of the concave mirror has its vertex or midpoint lying farther away from the objects than the edges.
Thus, we can conclude that the surface of the concave mirror is curved inward. Hence, option (4) is correct.
Learn more about the concave mirror here:
brainly.com/question/13300307
Answer:
motion
Explanation:
when an object moves, it gains kinetic energy. so correct option in motion.
hope it helps!
PART A)
Heat released by iron = heat gain by water
now we have
PART B)
When endothermic changes takes place in the system then system absorbs the energy from its surrounding and keeps on cooling down
Due to this the observer will feel the cool down of the surface temperature and conclude that it is an endothermic reaction
PART C)
When a substance freezes its temperature do not change but if we will check the potential energy of molecules we can conclude that the system released its energy which is known as latent heat.
This will lead to the increase in its potential energy
And due to this decrease in latent heat the substance will freeze