20 Answered Questions for the topic Sound And Light Waves

Sound And Light Waves

03/01/18

Is sound caused by an echo
 I need to know if sound is caused by echos
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Sound And Light Waves Science Physics Communication

03/30/17

The Inverse Square Law
Hi, I have a hard time understanding the concept of the Inverse Square Law, and hence, answering this question. Please help!   The inverse square law for the intensity of light explains why we... more
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Sound And Light Waves Science Physics Word Problem

03/18/17

Waves and energy
"When you speak to someone, the air molecules travel from your voice box into the person's ear, thus carrying the sound wave to them."   Is the above statement correct? Explain your... more
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Sound And Light Waves

04/21/16

If a have a green light what is its wavelength?
Say I bought a green colored light from the hardware store would there be a specific range for the light's wavelength to be or could it be any wavelength that we can see?
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Sound And Light Waves Physics Energy

01/22/16

Is sound energy renewable or non-renewable?
Is sound energy renewable or non-renewable?
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Sound And Light Waves Physics Astronomy Physics C

12/05/15

Hubble Telescope question
The Hubble Space Telescope is a reflecting telescope in orbit about the earth so that its resolution would not be limited by turbulence in the atmosphere. Its objective diameter is 2.4 m. For... more
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Sound And Light Waves Science Physics Mechanical Physics

08/31/15

Two Forces are acting on an object, a 12-N force and a 5-N force. What is the minimum net force can act on the object?
Two Forces are acting on an object, a 12-N force and a 5-N force. What is the minimum net force can act on the object? Decribe the orientation of the forces in order to give a minimum net force.... more
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Sound And Light Waves Math Science Physics

07/22/15

Physics: What are the following for this system: amplitude, frequency, period, spring constant, max velocity and total energy?
A 27.8 gram mass oscillates on the end of a spring and its motion can be described by: (1.5 )sin (21.4 t ) [here the units are standard, meters and seconds]   What are the following for this... more
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Sound And Light Waves Math Science Physics

07/15/15

Physics: Doubling the intensity of sound (MC)
Doubling the intensity of sound:   a. Doubles the sound level. b. Increases sound level by factor of √2 . c. Increases sound level by 3 dB.
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Sound And Light Waves Physics Physics B Frequency

05/19/15

waves question?
There are two lines of string connected to an oscillator, one only slightly longer. The oscillator is set to vibrate at the lowest frequency, creating a standing wave in the shorter one. Will this... more
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Sound And Light Waves Physics Amplitude Waves

02/09/15

displacement, pressure amplitude & distance to sound level
A certain source of sound radiates uniformly in all directions in air. At a distance of 5 m the sound level is 80 dB. The frequency is 440 Hz. (a)What is the displacement amplitude at this... more
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Sound And Light Waves Physics Percentage Sustainable Energy

09/19/14

Calculate the average power density of rainwater in W/m2.
A location at an altitude of 1,220 m recieves annual rainfall of 790 mm. Calculate the average power density of rainwater in W/m2. You may assume that every drop of rain is captured in a dam and... more
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Sound And Light Waves Physics Percentage Energy

09/19/14

What percentage of Australia’s electricity consumption could be produced by wave farms?
It is estimated that 1 million GWh of wave energy hits Australian shores annually. Australia’s electricity consumption in 2012 was 225 billion kWh.Assuming 10% of our shores had wave farms with an... more
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Sound And Light Waves Math Physics Energy

09/17/14

Sustainable Energy
An upper limit of 24 kWh/d/p on the power available from wind in Australia was presented, subject to certain assumptions. The installed wind capacity in Australia in December 2012 was 2.576 GW. The... more
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Sound And Light Waves Physics Math Question Sustainable Energy

09/17/14

Sustainable Energy: Wind
A wind farm occupying a certain (unspecified) area in which the average wind speed is 3 metres per second (m/s) generates an average power of 5 kWh/d. If the wind speed is doubled to 6 m/s, what is... more
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Sound And Light Waves Math Physics Meters

09/17/14

Sustainable Energy
The average annual rainfall in the Newcastle region is 1133 mm and the average land elevation is 21 metres. What would the hydroelectric power density be for the Newcastle region assuming everydrop... more
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Sound And Light Waves Physics Wave Theory Sustainable Energy

09/17/14

Sustainable Energy
A location at an altitude of 1,220 m recieves annual rainfall of 790 mm. Calculate the average power density of rainwater in W/m2. You may assume that every drop of rain is captured in a dam and... more
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Sound And Light Waves Physics Energy Wave Theory

09/17/14

What is it’s capacity factor?
The Pelamis Sea Snake wave energy collector has a peak power output of 750 kW, and can produce 2600 MWh annually.
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Sound And Light Waves

07/09/14

help with light waves and sound waves
      1,  do sound waves reflect off an object, then angle of  incidence equals the angle of reflection 2.  do light waves reflect off an object, then angle of incidence equals the angle of... more
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Sound And Light Waves

07/08/14

help with sound waves and light waves
I am confused with a few questions?   1.  can sound waves be polarized? 2.  can light waves be polarized?   3.  can light waves produce resonance? 4.  can sound waves produce... more
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