? auditory nerve; cochlea; hammer, anvil & stirrup bones; eardrum a microphone changes ? light energy into electrical energy ? sound energy into light energy ? electrical energy into sound energy ? sound energy into electrical energy sound travels ? slightly slower than light ? at the same speed as light ? much slower than ? faster than light where does sound travel fastest? ? in gases ? in solids ? the speed is the same in solids, liquids and gases ? in liquids Emily claps her hands, and hears the echo from a wall 2 seconds later. (Speed of sound = 330 m/s) ? the wall is 300 metres away ? the wall is 165 metres away ? the wall is 660 metres away ? the wall is 330 metres away the speed of sound in air is around ? 1,500 m/s ? 550m/s ? 330 m/s ? 1,100 m/s ultrasound is used by ? bats ? cats ? whales ? elephants which of these is true? ? cannot travel through a vacuum ? sound travels faster through gases than through solids ? sound cannot travel through solids ? can travel through a vacuum with a longitudinal wave ? the vibration has a low frequency ? the vibration is in the same direction as the wave travels ? the vibration is at right angles to the direction the wave travels ? the vibration is small which of these is false? ? sound travels slower through gases than through solids ? frequency is measured in Hertz ? sound cannot travel without a medium ? sound cannot travel through liquids a wave with a high frequency has ? a short wavelength ? a low pitch ? a small amplitude ? a long wavelength The usual range of human hearing is from ? 20Hz to 18KHz ? 30Hz to 25kHz ? 10Hz to 13kHz ? 50Hz to 25kHz where will you hear the most echoes? ? an empty sports hall ? a crowded sports hall
? auditory nerve; cochlea; hammer, anvil & stirrup bones; eardrum a microphone changes ? light energy into electrical energy ? sound energy into light energy ? electrical energy into sound energy ? sound energy into electrical energy sound travels ? slightly slower than light ? at the same speed as light ? much slower than ? faster than light where does sound travel fastest? ? in gases ? in solids ? the speed is the same in solids, liquids and gases ? in liquids Emily claps her hands, and hears the echo from a wall 2 seconds later. (Speed of sound = 330 m/s) ? the wall is 300 metres away ? the wall is 165 metres away ? the wall is 660 metres away ? the wall is 330 metres away the speed of sound in air is around ? 1,500 m/s ? 550m/s ? 330 m/s ? 1,100 m/s ultrasound is used by ? bats ? cats ? whales ? elephants which of these is true? ? cannot travel through a vacuum ? sound travels faster through gases than through solids ? sound cannot travel through solids ? can travel through a vacuum with a longitudinal wave ? the vibration has a low frequency ? the vibration is in the same direction as the wave travels ? the vibration is at right angles to the direction the wave travels ? the vibration is small which of these is false? ? sound travels slower through gases than through solids ? frequency is measured in Hertz ? sound cannot travel without a medium ? sound cannot travel through liquids a wave with a high frequency has ? a short wavelength ? a low pitch ? a small amplitude ? a long wavelength The usual range of human hearing is from ? 20Hz to 18KHz ? 30Hz to 25kHz ? 10Hz to 13kHz ? 50Hz to 25kHz where will you hear the most echoes? ? an empty sports hall ? a crowded sports hall