The quantity of heat necessary to change the temperature of a definite amount of air is easy of calculation.
This unit, as has already been stated, is the amount of heat necessary to change a pound of water, 1°F.
The cost of good ventilation is often looked upon as prohibitive, because of the expense in heat necessary to keep the inside atmosphere at standard purity.
Now, as Regulus of Antimony itself is very volatile, a good deal of it would be dissipated along with the Sulphur, if it were exposed to the degree of heat necessary to carry off the Sulphur when the mass is melted.
The amount of heat necessaryto melt 1 gram of ice is easily calculated.
We know very well that potatoes cease boiling if a pinch of salt is put in the water; this is because the temperature of the water has been lowered by the amount of heat necessary to dissolve the salt.
The British unit of heat, or thermal unit, used by engineers in England and in the United States, is the quantity of heat necessary to raise one pound of pure water at and near its temperature of greatest density (39.
Gram degree, or Gramme degree (Physics), a unit of heat, being the amount of heat necessary to raise the temperature of one gram of pure water one degree centigrade.
The unit most commonly employed is the amount of heat necessary to raise the temperature of one gram or one pound of water from zero to one degree Centigrade.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "heat necessary" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
