Exam Topics

Electrical method

________- forms a temporary magnet, wrap the steel bar with a solenoid.

Kinetic energy

________ which strikes the ground, is lost as heat and sound.

Transverse

________ Waves- transmit energy by motion at right angles to or across the direction in which the energy is moving.

Ultrasound

________- sound waves with a frequency higher than human audibility (20, 000Hz)

Infrasound

________- sound waves with a frequency below human audibility (20Hz)

X rays

________ pass easily through flesh but not through bone.

Electromagnetic induction

________ then occurs in the coil producing the alternative voltage.

opposite reaction

Every action has an equal and ________.

Potential energy

________= weight x change in height.

Specific heat capacity

________= (energy)/mass x temperature.

constant magnetic field

It deflects a pointer in response to an electric current flowing through a coil in a s= ________.

Ray

Reflected ________- light ________ which bounces off the mirror.

longitudinal wave

Sound is a(n) ________.

Lift/Upthrust reaction/normal

upward force

Drag/friction

backward force

thrust

forward force

weight

gravitational force

Mass

Scalar

Weight

Vector

Longitudinal Waves

transmit energy in the same direction as the wave

Transverse Waves

transmit energy by motion at right angles to or across the direction in which the energy is moving

The Normal

the perpendicular to the mirror at the point where the incident ray strikes it

Incident Ray

light ray which hits the mirror

Reflected Ray

light ray which bounces off the mirror

Angle of incidence (i)

the angle between the incident ray and the normal

Angle of reflection (r)

the angle between the reflected ray and the normal

By stroking

stroking an un-magnetized material in one direction only, with a magnet, lines up each domain, so that they are all ‘pointing in the same direction

Magnetic Induction

a magnetic pole induces an unlike pole near it and a like pole away from it

Electrical method

forms a temporary magnet, wrap the steel bar with a solenoid

Infrasound

sound waves with a frequency below human audibility (20Hz)

Ultrasound

sound waves with a frequency higher than human audibility (20,000Hz)