One way to keep the contents of a garage from becoming too cold on a night when a severe subfreezing temperature is forecast is to put a tub of water in the garage. if the mass of the water is 148 kg and its initial temperature is 22.3°c, how much energy must the water transfer to its surroundings in order to freeze completely?

The energy is transferred to the surroundings from water in order to freeze completely.

Explanation:

Water will transfer to surrounding will come from cooling energy from 22.3°C  to 0°C and then freezing energy is

We know that,

\mathrm{C}_{\mathrm{W}}=4190 \mathrm{J} / \mathrm{kgk}

As per given question,

M = 148 kg

Substitute the values in the above formula,

The energy is transferred to the surroundings from water in order to freeze completely.

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