-1 3. A ball of copper of specific heat capacity 400j kg k weighting 400 gm is' tansferred from a furnance to 1 kg of water at 10°c . The temp of water rise to 50°c. What is the original temp of the ball?

i believe it is b. what was the cause of the big bang

hope this !

this means that the temperature of both substances will be equal

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