Astraightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. what is the density of a 333-g rock that displaces 51 cm3 of water? (note that the accuracy and practical applications of this technique are more limited than a variety of others that are based on archimedes’ principle.)

The density of the object will be 6.53 g/ml.

Explanation:

Density is defined as the mass contained per unit volume.

Given : Mass of rock = 333 grams

volume of rock = Volume of water displaced = = 51 ml

Putting in the values we get:

Thus density of the rock will be 6.53 g/ml

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