Physics P2 Rev
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is a force? | Can cause change to shape or movement of an object
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| What does a slope mean on a distance/time graph? | Steady speed/Accelerating
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| What does a straight flat line mean on a distance/time graph? | Stopped
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| On a distance/time graph GRADIENT= | Speed
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| On a velocity/time graph a sloping line up means | Acceleration
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| On a velocity/time graph a flat line means | Steady Speed
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| On a velocity/time graph a line along the bottom axis means | Stopped
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| On a velocity/time graph a sloping line down means | Decelerating
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| On a velocity/time graph GRADIENT= | Acceleration
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| What is terminal velocity | When you fall through a fluid and there is a frictional force (drag)
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| What is acceleration | When an objects velocity changes
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| Pull forces are always | Equal and opposite to eachother as they increase
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| Extension of a spring is | Directly Proportional
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| Extension of an elastic band is | Not directly Proportional
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| Speed- | Distance divided by time
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| Regenerative Braking systems... | Uses system that drives the vehicle to do the majority of the breaking. Puts the vehicle in reverse
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| Air Bags... | Slow you down more gradually to prevent you from hitting hard surfaces inside the car
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| Crumple Zones... | Crumple on impact as kinetic energy is converted into other typed of energe by the car body as the shape changes. It increases the impact times.
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| Side Impact Bars... | Direct kinetic energy of crash away from passengers
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| Seat Belts... | Increases time for the wearer to stop and reduces the forces in the chest
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| What is Momentum? | The property of moving objects
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| Momentum before= | Momentum after
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| The current in a circuit depends on | The resistance of the components and the supply (Amps)
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| What is potential difference? | The driving force that pushes the current around the circuit
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| How is static electricity made? | By rubbing 2 different non conductors together
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| In static electricity which electrons move? | Negative
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| If a material gains electrons... | It becomes negatively charged
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| In series circuits potential difference is... | Shared
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| In series circuits current is... | The same everywhere
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| In series circuits cell voltages... | Add up
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| In Parallel circuits potential difference is... | The same everywhere
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| In Parallel circuits current is... | Shared between branches
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| What is direct current? | Cells and batteries supply current that always passes in the same direction
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| What is alternating current? | Current that is constantly changing direction
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| How many cycles are there per minute in mains electricity | 50
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| Blue cable is | Neutral
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| Brown cable is | Live
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| Green and yellow cable is | Earth
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| What is a circuit breaker? | An electrical device that protects the circuit from damage if too much current flows
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| What is the function of a fuse? | When the current in a fuse wire exceeds the rating of the fuse it will melt so breaks the circuit
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| The nucleus in the plum pudding model... | Is tiny and makes up most of the mass of the atom because it contains protons and neutrons so has a positive charge
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| The majority of an atom is | Mostly empty space
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| Negative electrons... | move around the nucleus really fast which gives it it's overall size
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| Alpha radiation... | has 2 protons and 2 neutrons so is a helium nucleus. They are big, heavy and slow moving and are stopped by almost any material
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| Beta radiation... | Are quite fast and small and have a long range. They are electrons with a charge of -1.
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| Gamma radiation... | Penetrate far into materials and have no mass or charge as they are EM waves
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| What is half life? | The average time it takes for the number of nuclei in the isotope in a sample to halve
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| What is fission | When the nuclei SPLITS into 2 smaller nuclei and 2 or 3 neutrons and releases energy
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| What are the 2 fissionable substances? | Uranium-235 and Plutonium-239
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| What is fusion? | The joining of 2 atomic nuclei to form a larger one. It is the process in which energy is released in stars
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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