Year8_Physics_1

These are the ones very hard or gone wrong

The height of a wave is called?

amplitude

What is the point of a turning force acts around called?

pivot

What can an unbalanced force cause?

change in direction, change in speed

Speed

Distance over time

What is renewable energy?

energy that derives from natural sources and can be replenished infinitely (if the conditions are right): HEP, wind, biomass, geothermal, solar

Pressure

Force over area

Force

mass x acceleration

The directions the undulations of a tranverse wave travel at?

90 degrees

Refraction

light bends

Reflection

light turns at the same angle. angle of incidence = angle of reflection

Why does a duck float?

upthrust

voltage

The potential difference of two charges

amperes

The flow of electrons

resistance

how hard it is for the current to get through

resistance formula

Volts over amps (ohms)

Moment

the tendency for a body to move at an axis; FORMULA: distance x force

parallel circuit

branches so that the current is divided; voltage is equal

series circuit

current flows through the same wire; voltage decreases

Ohm’s law

Voltage is directly proportional to amps