physics

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what is density?
density how closely packed something is . Less dense =spaced out particles and most dense= particles really close together
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is it true that the more dense the object is the heavier it feels
TRUE - the more dense something is the heavier it feels.
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what is the equation for density
density = mass(g) / volume(cm3)
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what are the units for density
...........g(mass)/cm3(volume
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what is pressure
Pressure is a measure of how much force is acting on an area.
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what is the equation for pressure?
force/area
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why is it good to have a large surface area and the same weight but not a smaller surface area
because if you have a large surface area it will spread the weight and distribute the amount of pressure making
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what is pressure measured in ?
N(force (newtons))/cm2(area(centremetres)) N(force(newtons/m2(area(metres))
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what is a moment?
the turning effect of a force
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what is a pivot?
the turning point
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how do you calculate a moment
force applied*distance from turning point
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what is a moment measured in
Nm (Neuton metres)
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is it true that further away something is the less gravitational force between them.
TRUE!!!!!!1
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What is gravity
the effect of gravitational attraction between masses
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why do we have seasons ?
because the earth is tilted and when its winter the northern hemisphere is facing away from the sun whereas in the summer it is facing towards the sun making it much warmer!!
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why in winter does the sun look not as far away
because the northern hemisphere is faced away from the sun (he
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how hot is the sun
5527 c
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what is a light year?
it is the distance travelled by light in 1 year
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Card 2

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is it true that the more dense the object is the heavier it feels

Back

TRUE - the more dense something is the heavier it feels.

Card 3

Front

what is the equation for density

Back

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Card 4

Front

what are the units for density

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Card 5

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what is pressure

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