16. When you add calories to heat up a substance, you have to keep track of...
16. When you add calories to heat up a substance, you have to keep track of three physical quantities. Which of the following four quantities in NOT needed for the calculation?
A. What substance is it, and how easy is it to heat up?
B. How much of the substance do you have?
C. The melting point on the Kelvin scale.
D. How many degrees is it heated up?
17. In which kind of problem would you use the work formula?
A. stopping distance
B. velocity
C. acceleration
D. stopping time
18. Two identical cars travel at equal speeds but stop suddenly. The stopping force is smaller for the car with smaller stopping time.
True
False
Homework Answers
16) the melting point on the Kelvin scale
......
17) stopping distance
......
18) false
Add Answer to:
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