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Kiran (Student) March 23 2015
Kiran (Student) May 7 2015
Hazel (Parent) May 31 2015
Hazel (Parent) May 14 2015
Our conventional numbering system is based around the idea that we can represent any number with 10 different digits arranged in a specific order. Because of this, this is called a base-10 or decimal system. In binary, we can represent any number we want with only two different numbers a 1 or 0, so it is called a base-2 system.
Let's look at an example, first in decimal.
The number 1234 can be broken down into:
1 x 4 +
10 x 3 +
100 x 2 +
1000 x 1
100 x 4 +
101 x 3 +
102 x 2 +
103 x 1
From this we can see the evidence of a base 10 system, each time we look at the next digit, we increase the power of the multiplier.
So bearing this in mind, we can look at a binary number, made of just 1's and 0's, for example 0110.
Just as above, every time we look at teh next digit, we increase the power of the multiplier BUT binary is base-2...so:
20 x 0 +
21 x 1 +
22 x 1+
23 x 0
And adding all these numbers up lets you convert a binary number to decimal. So 0110 in decimal is 0+2+4+0 = 6!see more
To understand this, we must first know how sound energy gets from one place to another. This is done via waves, of which there are two different types: longitudinal and transverse.
Light is a transverse wave which travels just like a piece of string would if it was fixed at one end and moved up and down at another, and looks like a sine wave.
Sound, however is longitudinal which means energy (sound in this case) moves along by hitting the atoms next to it. These atoms then vibrate and hit their neighbours and so on. Eventually these vibrations reach our eardrum and start vibrating that which is how we hear.
Space is a vaccum meaning there are no particles to vibrate. If nothing can vibrate then no energy can be transferred meaning no noise!see more