oki here are 3 questions! last one's!!
When thermal energy is added to an object, what happens to the motion of the particles?
A.
Decreases
B.
Decreases, then increases
C.
Remains unchanged
D.
Increases
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Which is the most accurate comparison of changes in average kinetic energy between the blocks?
A.
Sample 2 will decrease, while Sample 3 will increase
B.
Sample 3 will decrease, while Samples 1, 2 and 4 will increase
C.
Sample 1 will decrease, while Sample 2 will increase
D.
Sample 1 will decrease, while Samples 2 and 3 will increase
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Minji wants a cold soda, but the only can she has is room temperature. Which investigative plan would allow her to cool the can as quickly as possible?
A.
Place the can beside an ice pack so that conduction will cool the can throughout and convection will occur from the colder side of the can to the warmer side of the can
B.
Place the can in a refrigerator so that the can will cool evenly as it radiates heat to the colder refrigerator
C.
Place the can beneath an ice pack so that conduction will cool the can beneath the ice pack and convection will cause the colder soda at top to sink and cool the warmer soda at the bottom
D.
Place the can on top of an ice pack so that conduction will cool the can above the ice pack and convection will cause the colder soda at the bottom will rise and cool the warmer soda at the top.
