What is the cornea and what is its role in the eye?
It is a transparent window, it does most of the eyes focusing.
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What is the iris ad what's its role in the eye?
It is the coloured part of the eye, it controls the intensity of light entering the eye.
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What is the lens's role in the eye?
It is connected to the ciliary muscles by the suspensory ligaments and when the ciliary muscles contract, tension is then released and the lens takes on more of a fat and spherical shape.
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Where are images formed?
On the retina, which is covered in light sensitive cells. These cells detect light and send signals to the brain to be interpreted.
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What is the equation for a moment?
MOMENT=perpendicular DISTANCE from the line of action of the force the pivot X FORCE
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How do you get the maximum moment?
You need to push at right angles perpendicular to the object.
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How is a resultant force made?
If the total anticlockwise moments do not equal the total clockwise moments.
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What is the time taken for a pendulum to swing from one side to the other?
A time period
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Pressure in a liquid...
Is transmitted equally in all directions.
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What are hydraulics used for in every day life?
Car Breaking systems,car jacks, manufacturing, deployment of landing gear.
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What is the force that keeps something moving in a circle?
The centripetal force
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What force is providing the centripetal force?
Friction, Tension and gravity.
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What does centripetal force depend on?
Mass, speed and radius.
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What is a magnetic field?
A magnetic field is a region where magnetic materials (like iron and steel) and also wires carrying currents experience a force acting on them.
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Which way does a magnetic field travel?
North to south pole
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What is a magnet called when its current can be switched off?
An electomagnet
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Other cards in this set
Card 2
Front
What is the iris ad what's its role in the eye?
Back
It is the coloured part of the eye, it controls the intensity of light entering the eye.
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