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Goal 3
Test Description: Use information from class to answer the following questions
Instructions: Answer all questions to get your test result.
1) what is the potential energy acquired by an onject with a mass of 5.00 kilogram when it is raised 5.00 meters?
A
25.0 J
B
49.0 J
C
480 J
D
245 J
2) A metal rod and a brick are both in the sun. Assuming that both are the same mass, which property of matter will make one hotter to the touch than the other?
A
specific heat
B
melting point
C
boiling point
D
Density
3) A 3.00 - kg object rests on the roof's edge of a 10.0 - m high building. What is the object's potential energy?
A
294 J
B
300 J
C
33.0 J
D
22.8 J
4) How much power is used to lift a box that weighs 50 Newtons 10 meters in 10 seconds?
A
50 watts
B
5000 watts
C
5 watts
D
500 watts
5) A total of 750 J of work was done when a force of 125 N was exerted on a box to move it. How far was the box moved?
A
850 m
B
600 m
C
6.00 m
D
906 m
6) A student exerts a force of 500 N pushing a box 10 m across the floor in 4 s. How much work does the student perform?
A
50 J
B
1250 J
C
5000 J
D
2000 J
7) In which example would the amount of work done equal zero?
A
holding a 1,000 - N rock overhead
B
carrying a bag of groceries upstairs
C
writing a book report
D
filing papers in a file cabinet
8) How does ice cool a warm drink?
A
Heat flows from the ice to the drink
B
Cold flows from the ice to the drink
C
Cold flows from the drink to the ice
D
Heat flows from the drink to the ice
9) Why is lightning seen before thunder is heard?
A
Light travels slower than sound
B
Lightning has less energy than thunder
C
Light travels faster than sound
D
lightning has more energy than thunder
10) A student opens the top window and the bottom window in a hot room. Warmer air goes out the top window, while cooler air comes in the bottom window. Which best explains why the room becomes cooler?
A
radiation
B
conduction
C
heat reaction
D
convection
*select an answer for all questions
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