The string must be pulled taut in order for the phone to work. Longitudinal waves travel through a medium by a process of compression and rarefaction, which in this case alters the tension of the string. If the string is not taut, the alterations in tension will not vibrate the listener's cup. Similarly, elastic strings will not work properly, because the wave will just stretch the string without vibrating the listener's cup.
Don't let the string come into contact with any other objects, as this will partially divert the sound wave into the object, causing a weaker signal on the receiving end. Speaking into the cup transmits the sound of the speaker's voice into the bottom of the cup. The bottom of the cup acts as a diaphragm and vibrates with the sound of the speaker's voice. As the bottom of the cup vibrates, it transmits the vibrations into the taut string. The sound travels along the string as a longitudinal wave and ultimately vibrates the bottom of the receiving cup. The cup transmits the sound into the air around the listener's ear, allowing her to hear the speaker. Because the sound travels through solid mediums--the cup and the string--it travels more effectively than through air, allowing the users to communicate across large distances with volumes that would be inaudible if spoken through air
first you plug that in then plug that in the do this go over there and press the button
AAHASS
Styrofoam insulates better than a single layer of plastic. If, however, you have one of those plastic cups that have an outer and an inner "wall" with a sealed air space in between, that should work better than the Styrofoam.
You're talking about holding the temperature of the water, right? As far as containing the liquid, they're about equal...but a styrofoam or double-wall plastic cup would hold temp better than a glass cup which would work better than a single-wall plastic cup.
Who was Tracy who drinks for a plastic cup
it takes 6 plastic bags to make a Starbucks plastic cup
A plastic cup can be recyclabe but it's definitely not renewable.
Plastic is less dense than glass, so normally a plastic cup is considerably lighter than a glass cup, although in theory a very small glass cup could weigh less than a very large plastic cup.
Plastic is bad for the environment and foam isnt
The thin plastic cup is a poor insulator.
Yes A2: Yes, If it's a Foam cup. Not if it's simply a solid plastic cup.
A glass cup will conduct heat away quickly - a plastic cup would hold heat the best.
is a plastic cup manufactured
AnswerYES !!! GSM Phones, CDMA Phones will work in India