1. Radioactive minerals in common granite release 0.04 joules per Kg of energy e
ID: 1317242 • Letter: 1
Question
1. Radioactive minerals in common granite release 0.04 joules per Kg of energy every year. If a 1 Kg chunk of 50o C granite is thermally insulated so all the energy released heats the granite, then how may years does it take to reach the melting temperature of 700o C? (Assume a specific heat of granite is 835 jules/Kg-o C
How many years would would be required if the chunk of granite was 1 million Kg? Explain
True or false: To calculate the time to melt the 700 degree Celsius granite you would need to know the specific heat and the melting temperature.
2. In a household radiator 1000 grams of 100o C steam condenses and this water cools to 90o C. Total heat released altogether?
Explain the situation using a sheet of plastic, a cup and stone to obtain and collect water in the cup in a desert environment.
Explanation / Answer
Answer
(1)
The years does it take to reach its melting temperature of 700*C
200 cal/(kg
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