[BU3] Module 3: Velocity and Speed of Sound Wave, Wavelength

sound wave

a pressure disturbance that travels through a medium by means of particle to particle interaction

velocity

quantity that designates how fast and in what direction a point is moving

speed

a scalar quantity that refers to the rate of change of position of an object in any direction

speed

function of distance travelled

velocity

function of displacement

instantaneous velocity

velocity of a body at any given time

speed

_____ of an object moving can never be negative

velocity

_____ of a moving object can be zero

speed

______ is a prime indicator of the rapidity of the object

velocity

_____ is the prime indicator of the position as well as the rapidity of the object

wavelength x frequency

formula for wave velocity

true

all soundwave travel with the same speed in air regardless of their frequency

0.33km per km

velocity of sound in air

1.5km per km

velocity of sound in water

5km per km

velocity of sound in steel

high; low

when an object moves outward, it creates an area of ___ pressure. when an object moves inward, it creates an area of ____ pressure.

speed of sound

distance travelled per unit time by a sound wave as it propagates through an elastic medium

distance/time

formula for speed

false

the faster a sound wave travels, the less distance it will cover in the same period of time

elasticity

properties related to the tendency of a material to maintain its shape and not deform whenever a force or stress is applied to it

true

rigid materials have high elasticity

true

a sound wave will travel faster in a less dense material than a denser material

sound propagation

travelling of sound from the sound source to the surrounding medium

343 m/s

average speed of sound, air at 20 degrees

60 m/s

speed of sound of rubber

1,210 m/s

speed of sound of lead

3,240 m/s

speed of sound of gold

4,540 m/s

speed of sound of glass

wavelength

distance travelled by the pressure wave during one cycle

true

waves can bend around small objects, while larger objects may block waves

wavelength

essential quantity to know when trying to understand how waves move through the world

omnidirectionality

sound spreads evenly in all directions