Question

1. determination of ice and the boling point of water 2. verification of the laws of reflection of sound​

Answer 1

Explanation:

• To determine the melting point of ice and boiling point of water. Melting Point: The temperature at which the solid changes into liquid at the atmospheric pressure is called melting point. For example, ice melts at 0°C to form water. ... For example, water boils at 100°C to form water vapour (at 76 cm pressure).
• To verify laws of reflection of sound. ... That is, the reflected ray lies in the same plane of incidence (in which the incident ray and normal to the reflecting surface at the point of incidence lies), and the angle of reflection (∠r) is equal to the angle of incidence (∠i ).