Hi am struggling with specific latent heat questions: 1. how much energy is required to melt 40 kg of lead
2. a 3.0kW kettle contains boiling water and is on top of balance, it is turned on for 2 minutes, and the reading changes from 1.487 kg to 1.343 kg. use this energy to calculate the energy required to boil 1kg of water

Explanation:

Double integrals are a way to integrate over a two-dimensional area. Among other things, they lets us compute the volume under a surface.

6/12=1/2

step-by-step explanation:

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