Eighty calories must be added to one gram of I've at zero degrees Celsius to melt it. Whst is the approximate mechanical equivalent of this amount of energy?
To find the approximate mechanical equivalent of energy, we can make use of the concept of specific heat and the principle of mechanical equivalent of heat. The specific heat is the amount of heat energy required to raise the temperature of a substance by a certain amount, and the mechanical equivalent of heat relates mechanical work to heat energy.
In this case, we know that 80 calories of energy must be added to one gram of ice at zero degrees Celsius to melt it. First, let's convert calories into a more standard unit like joules.
1 calorie is approximately equal to 4.184 joules.
So, 80 calories can be converted into joules by multiplying 80 by 4.184:
80 calories * 4.184 J/cal = 335.2 joules (approximately)
Now, using the principle of mechanical equivalent of heat, which states that 1 calorie is equivalent to approximately 4.184 joules of mechanical energy, we can determine the mechanical equivalent of this amount of energy.
335.2 joules / 80 calories = 4.19 joules/cal (approximately)
Therefore, the approximate mechanical equivalent of the given amount of energy is approximately 4.19 Joules/cal.