Specific Heat: In grinding a steel knife, the metal can get as hot as 400°C. If the blade has a mass of 80 g, what is the minimum amount of water needed at 20°C if the water is to remain liquid and not rise above 100°C when the hot blade is quenched in it? The specific heat of the steel is 0.11 cal/g ? C° and the specific heat of water is 1.0 cal/g ? C°.
A. 22 g
B. 33 g
C. 44 g
D. 55 g
Answer: B
You might also like to view...
_________ are electromagnetic radiation with wavelengths typically from 0.1 nm to 1 nm.
Fill in the blank(s) with the appropriate word(s).
According to observations, which type of galaxy was much more common when the universe was 2 billion years old than it is today?
A) irregular galaxies B) elliptical galaxies C) spiral galaxies D) We can't say because humans were not alive at that time.
A combination of a 2.0-? resistor in series with 4.0-? resistor is connected in parallel with a 3.0-? resistor. What is the equivalent resistance of this system?
A) 2.0 ? B) 3.0 ? C) 4.0 ? D) 9.0 ?
Why do you think you were asked to complete more cycles in Procedure 1, Step 3, if the total time was less than 10 seconds for 10 cycles?