In order to answer either of these, we need to know the energy content of coal ... like kwh (or joules or BTU) in each kilogram (or pound or ton) of coal.
Answer:
500N/m
Explanation:
Original Length = 20cm
Final length = 22cm
extension = 22 - 20 = 2cm = 0.02m
Force F = 10N
From Hooke's law, F = ke
==> k = F/e = 10/0.02 = 500N/m
The amount of energy required to raise the temperature of one gram of water by one celsius degree is called a calorie.
<h3>How can you define calorie?</h3>
In physics, we can define it as a unit of measurement that defines the amount of energy to raise the temperature of 1 gram of water by 1°C. Each material has its unique calorie, however by definition we use water as it is the lowest of all the elements.
Normally, calorimetry is directly linked with the thermal capacity that an element has to contain heat.
See more about calorie at brainly.com/question/22374134
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Answer:
Q = 1386 J
Explanation:
Mass, m = 60 g = 0.06 kg
Specific heat of copper, c=385 J/kg K
It is heated from 20°C to 80°C.
We need to find the heat absorbed. It can be given by the formula as follows :
So, 1386 J of heat is absorbed.
It’s A, Excess H+ is absorbed by bicarbonate ions.