Sound

Sound

Multiple Choice

Sound is produced by -----

• Heat energy

• Low temperatures

• Vibrations

• Friction

Multiple Choice

An object that does not vibrate cannot produce

• Sound

• Light

• Heat

• Electricity

Multiple Choice

When does sound refract?

• When it travels in a vacuum.
• When it moves through cold air.
• When it travels in only one medium.
• When it moves from one medium to another.

Multiple Choice

This is what you get when sound waves are reflected, or bounce back, off of a hard surface.

• Amplitude

• Pitch

• Volume

• Echo

Multiple Choice

What is an echo

• deflected sound

• refracted sound

• reflected sound

• diffracted sound

Multiple Choice

In which medium sound can't travel?

• solid

• liquid

• gas

• vacuum

Multiple Choice

What type of wave are sound wave?

• longitudinal

• transverse

• electromagnetic

• sea wave

Multiple Choice

Determine the time delay between the pulse emitted by a person yelling in the Grand Canyon, and the reflected pulse as it bounces off the far canyon wall 500 meters away. The velocity of the emitted pulse is 352 m/s.

• 1.42 s

• 2.84 s

• .704 s

• .352 s

Multiple Choice

What medium does sound travel through slowest?

• gas

• solid

• liquid

• trees

Multiple Choice

Sound travels FASTEST through which of these materials?

• Air

• Empty space

• Metal

• Water

Multiple Choice

Sound waves travel the FASTEST through _____________.

• Gases

• Liquids

• Solids

Multiple Choice

High amplitude is quiet or loud?

• Quiet
• Loud

Multiple Choice

______ is how loud or soft a sound is; depends on the amplitude.

• pitch

• frequency

• loudness

• medium

Multiple Choice

A soft, low pitch sound would have which of the following....

• low frequency 
  high amplitude 
• high frequency 
  high amplitude 
• low frequency 
  low wavelength  
• low frequency
  low amplitude 

Multiple Choice

True or False: The higher the pitch, the lower the frequency.

• True

• False

Multiple Choice

Which sound wave has the lowest pitch?

Multiple Choice

Which of these sound waves has the highest frequency?

Multiple Choice

What is volume?

• how high or low a sound is

• the loudness or softness of a sound

• the number of vibrations per second

• vibrations

Multiple Choice

look at the picture. There are 4 sound wave with different amplitude and wavelength. Which sound wave has loudest sound?

• A

• B

• C

• D

Multiple Choice

After closing a deal with a client, Kent leans back in his swivel chair and spins around with a frequency of 0.5 Hz. What is Kent’s period of spin?

• 120 s

• 0.0083 s

• 0.5 s

• 2 s

Multiple Choice

Frieda the fly flaps her wings back and forth 100 times each second. The period of her wings flapping is:

• 100 s

• 0.01 s

• 0.01 Hz

• 100 Hz

Multiple Choice

The period of a pendulum is 10 s. What is its frequency?

• 10 Hz

• 1 Hz

• 0.5 Hz

• 0.1 Hz

Multiple Choice

What frequency range represent the human hearing capacity

• Below 20 Hz
• Between 20 Hz and 20 000 Hz
• Between 20 000Hz and 40 000 Hz
• Above 20 000 Hz

Multiple Choice

You cannot hear ultrasound because it is:

• too loud
• too quiet
• high frequency
• low frequency

Multiple Choice

The sound frequencies used by Bats to navigate is

• Infra sound

• Super sonic

• Audible

• Ultrasound

Multiple Choice

A sound with a frequency below 20 Hz can be heard by

• Man

• Woman

• Elderly persons

• Elephant

Multiple Choice

Ultrasound occurs at frequencies above 20,000 Hz.

• True

• False