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15
×
how is called the force acting on an object when it falls through the air
air resistance
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15
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list five properties of metals
solid at room temperature (except for mercury which is the only liquid metal), they are shiny, do not good conductors, malleable, ductile, sonorous
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15
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Look at the diagram, what are the directions (arrow) of the pushing and friction forces ?
friction (left) and push (right)
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15
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iron is used for bridges because it is .....
strong (
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Hard but can easily break
brittle
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seesaw
Swap points!
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rocket
Go to first place!
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fairy
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25
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lifesaver
Give 15 points!
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15
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what type of energy is caused by friction?
heat energy
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15
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What is the weight of a sack of potatoes which mass is 15 kg (1 kg means 10 N)
150 N
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15
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when two forces cancel each other we say that they are...
Balanced
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15
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How is called the push of an object on another when they are touching
contact force
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thief
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25
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gift
Win 25 points!
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fairy
Take points!
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thief
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25
15
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Give two reason electric wire are covered with plastic
plastic is an insulator/does not conduct electricity AND flexible
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seesaw
Swap points!
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seesaw
Swap points!
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gift
Win 15 points!
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lifesaver
Give 25 points!
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15
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cobalt, nickle, iron and steel can be attracted by magnet they are ...
magnetic metals
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15
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Give the name of the TWO forces represented by the arrows
air resistance (upwards) and weight (downwards)
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15
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What name we give to the amount of matter in an object?
The mass
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