• Created by: phoebe_98
• Created on: 10-04-15 14:22
WHAT ARE NEWTONS THREE LAWS ON MOTION?
If forces are equal and opposite (balanced) then object remains as it was, Resultant force will cause acceleration in that direction and Objects in contact will exert an equal and opposite force on each other
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DESCRIBE THE DIRECTION WITH AN EXAMPLE FOR D.C. AND A.C. CURRENT IN A CIRCUIT
D.C. – current is in same direction e.g. a battery A.C. – current is always changing direction e.g. generator
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NAME THE THREE WIRES FOUND IN A PLUG AND THEIR COLOURS
EARTH – yellow and green NEUTRAL – blue LIVE - brown
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DESCRIBE THE STRUCURE OF ALPHA & BETA PARTICLES AND GAMMAR RAYS
ALPHA – made up of 2 neutrons and 2 protons (helium nucleus) BETA – high speed electron from the nucleus GAMMAR RAYS – high frequency electromagnetic wave
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WHAT IS FUSION?
4 hydrogen nuclei are fused to create a helium nucleus producing light energy. However, a very high temperature is required
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NAME THREE WAYS IN WHICH YOU SHOULD HANDLE RADIOACTIVE SUBSTANCES
Keep as far a way as you can, use them for the shortest time possible, use protective clothing to stop ingesting them and use shielding to absorb radiation before it gets to you
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HOW DO ELECTRONS GET ROUND A SERIES CIRCUIT? (EXPLAIN USING CURRENT AND POTENTIAL DIFFERENCE)
There's only one way for the electrons to go. Components have the same current but share the pd (voltage)
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HOW DO ELECTRONS GET ROUND A PARALLEL CIRCUIT? (EXPLAIN USING CURRENT AND POTENTIAL DIFFERENCE)
There's more than one way for the electrons to go. Components have the same pd (voltage) but share the current
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WHAT IS HOOKE'S LAW?
The extension of a spring is directly proportional to the force applied.
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EXPLAIN HOW A BACKWARDS FORCE IS APPLIED TO PEOPLE IN THE CAR WHEN THEY HAVE A COLLISION TO REDUCE THEIR VELOCITY TO 0
A seat belt and airbag applies a backwards force. The crumple zone at the front of the car increases the time for the velocity to drop to 0.
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LIST THREE SOURCES OF BACKGROUND RADIATION
Radon gas (rocks), medical uses, ground and buildings, food and drink and cosmic rays
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WHAT HAPPENS TO THE OBJECT IF THE RESULTANT FORCE IS OPPOSITE TO THE DIRECTION OF MOTION?
The object will decelerate/slow down.
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NAME TWO WAYS IN WHICH THE THINKING DISTANCE CAN BE INCREASED
Drugs e.g. alcohol and distracting the driver with mobile phones
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GIVE THREE WAYS THAT THE SIZE OF THE AIR RESISTANCE CAN BE INCREASED
Increase the speed of the object, increase the surface area of the object and make the shape of the object less streamlined
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WHAT IS WORK?
It is an object moving in a direction of the applied force. Every time work is done energy is transferred.
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DESCRIBE HOW STARS ARE BORN
A large cloud of gas (nebula) collapses under its own weight. Gravity pulls the particles closer, heating the cloud. A protostar (glowing, hot ball of gas) forms . A star forms when the temperature at the center is high enough for fusion reactions
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## Other cards in this set

### Card 2

#### Front

DESCRIBE THE DIRECTION WITH AN EXAMPLE FOR D.C. AND A.C. CURRENT IN A CIRCUIT

#### Back

D.C. – current is in same direction e.g. a battery A.C. – current is always changing direction e.g. generator

### Card 3

#### Front

NAME THE THREE WIRES FOUND IN A PLUG AND THEIR COLOURS

### Card 4

#### Front

DESCRIBE THE STRUCURE OF ALPHA & BETA PARTICLES AND GAMMAR RAYS

WHAT IS FUSION?