А piece of ice having the mass of 0.2kg and initial temperature of 0°C is in mersed in
a copper vessel of mass 0.3kg and Containing 0.5kg of water at 35°C
Calculate the final temperature when all the
ice has melted. Assumed no loss of heat energy
Specific heat capacity of water is 4.2kg/k
Specific heat of Copper is 0.4kj/k
Specific Latent heat of fussion of ice 335kj/kg​

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

technology is the application of the knowledge gained by science.