# Physics

• Created by: Katie
• Created on: 19-05-13 13:08
what is area
area is the amount of surface an object has it is measured in metres (m) and killometres (km)
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what is the formular to work out area?
area = length x width
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what is volume?
volume is the amount of space an object takes up. volume is measured in in cm3 or m3
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how do u measure small iregular objects?
pour some water into a measuring cylinder e.g. 100 cm3. put the object into thhe cylinder. measure the final volume at the end. take the two volumes away from each other and that is the volume.
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how to measure the volume of large irregular objects
block the spout of a urika can with your finger. Fill it with water. take your finger off and let the exess water run out put the object in. let the exess water run out into measuring cylinder measure the water and that is the volume.
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what is mass?
the mass of an object is the amount of matter making it up. it is measured in grams (g) and killograms (kg). it is measured using a balance
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why are short reaction times hard to time.
they are hard to time because of the time it takes to stop and start the clock
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why are humans bad at judging tempurature
because it all depends on your body temperature before. e.g. if we put our hands in a bowl of cold water then in room temp water it is warm and if you put your hands in hot water then in room temp water it is cold.
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what is room temperature?
20 C
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what is bofy tempurature?
37 C
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what is the temperature in which water boils?
100 C
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what is the temperature in which water freezes?
0 C
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2 km2 =
20,000 cm2
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what must you always write when you work out area?
the formular = length x width
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what is hookes law?
this is whaen an elestic object such as a springis stretched the increased lengthis called the extension. if you put a 1km weight on a spring and that exceeds the elastic limit the spring will not start a 0 cm but more so it will not be a fair test.
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explain a beam bridge.
a straight block of wood with pushing out and compression pushing in wards.
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explain an arch bridge.
an arch with compression pushing in.
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explain a suspension bridge.
a beam bridge with strings pulling it up and tension pushing away on the string
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what is friction?
friction happens because surfaces are not smooth and they touch in lots of places.
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which way does friction go?
It goes against the pulling/pushing force
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what is the difference between mass and weight.
the mass of an object is the amount of matter making it up. It is measured in killograms using a balance. weight is the force of gravity on it. it is the force thayt keeps us on the surface of the earth. it is measured i newtons using a newton meatre
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does mass change?
mass doesnt change where ever you go but your weight changes depending on where you are.
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## Other cards in this set

### Card 2

#### Front

what is the formular to work out area?

#### Back

area = length x width

what is volume?

### Card 4

#### Front

how do u measure small iregular objects?

### Card 5

#### Front

how to measure the volume of large irregular objects