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15
×
How is called the push of an object on another when they are touching
contact force
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heart
Other team wins 10 points!
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fairy
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5
10
15
20
25
×
gift
Win 25 points!
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×
lifesaver
Give 20 points!
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15
×
Metals can be drawn out into wires, they are ....
ductile
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15
×
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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cobalt, nickle, iron and steel can be attracted by magnet they are ...
magnetic metals
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15
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Metal are used for jewellery because they are ...
shiny
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15
×
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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seesaw
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gold
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gift
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lifesaver
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15
×
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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copper is used for electrical wiring because .... (two things)
it conducts electricity and it is flexible
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15
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metals are strong and tough (hard), they do not ........... when dropped and do not crack easily.
shatter
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15
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list five properties of non-metals
many are gases at room temperature, dull, brittle, do not conduct heat and electricity well
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15
×
How is called the force produced when one surface slides over another
friction
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15
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Look at the diagram, what are the directions (arrow) of the contact force and weight?
weight (downwards) and contact force (upwards)
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heart
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magnet
Take 25 points!
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gift
Win 5 points!
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baam
Lose 25 points!
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15
×
The drawings shows a book hanging from a forcemeter. What is the weight of the book ?give the value and the unit
8 Newtons (8 N)
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