Chapter 3: Q. 3.21 (page 73)
Discuss the changes in the potential and kinetic energy of a roller-coaster ride as the roller-coaster car climbs to the top and goes down the other side.
Short Answer
Potential energy changes into kinetic energy
Chapter 3: Q. 3.21 (page 73)
Discuss the changes in the potential and kinetic energy of a roller-coaster ride as the roller-coaster car climbs to the top and goes down the other side.
Potential energy changes into kinetic energy
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Indicate whether each of the following statements describes potential or kinetic energy?
a. water at the lop of a waterfall
b. kicking a ball
c. the energy in a lamp of coal
d. a skier at the top of a hill
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Compost can be made at home from grass clippings, kitchen scraps, and dry leaves. As microbes break down organic matter, heat is generated and the compost can reach a temperature of , which kills most pathogens. What is this temperature in degrees Celsius? In kelvins? (3.3)
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Describe each property of the element fluorine as physical or chemical.
a. is highly reactive
b. is a gas at room temperature
c. has a pale, yellow colour
d. will explode in the presence of hydrogen
e. has a melting point of
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