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Aduh...lama rasanye cgu tk updated blog nie...ada ke yg rindu..?? Bukannye apa..cgu tahu you all cuti2 mana bukak blog nie...bila suruh ambil bahan je baru nak buka...jadi masa cuti tahun baru cina..cgu bagi you all cuti panjangggggg....he3.
Yes..cgu tahu ramai yg nak tengok gambar masa kita tengah belajar, buat eksperimen dan buat PEKA kan..!!
Cgu akan upload satu persatu ye..nanti panjang sangat lah pulak.. Bolehlah tunjukkan pada your parents yang kita tengah belajar..bukan main2 dalam lab..!!
Sambil cgu upload gambar..cgu tambahkan sedikit bahan utk bacaan ttg topik yg sedang kita pelajari..jgn lupa ye homework dalam buku SPS page 33-38...standby utk coming exam..!!Another execises will be updated later....
OK..let's begin ..!
SOUND
Sound is a vibration. When something makes a noise it is vibrating, and this causes air molecules around it to vibrate too. These vibrations are transmitted through the air, to our ears, where we perceive them as sound.
You can actually see the effect of sound vibrations with an easy experiment. Get a bowl and cover the top with plastic sandwich wrap. Pull the plastic tight across the top in all directions until it is flat and smooth; tape it tight if necessary. Then sprinkle some salt onto the plastic.
Now get a pot and spoon; hold them near the bowl and hit the bottom of the pot hard with the spoon. You should see the salt jump on the plastic. Try yelling loudly next to the bowl, and you may be able to make the salt jump using the vibrations from your voice.
The loud noise you make is a vibration, which is transmitted through the air, to your ear and also to the plastic. The plastic vibrates, and makes the salt crystals jump! Let's examine how sounds from a vibrating object turn into sound you hear.
You can actually see the effect of sound vibrations with an easy experiment. Get a bowl and cover the top with plastic sandwich wrap. Pull the plastic tight across the top in all directions until it is flat and smooth; tape it tight if necessary. Then sprinkle some salt onto the plastic.
Now get a pot and spoon; hold them near the bowl and hit the bottom of the pot hard with the spoon. You should see the salt jump on the plastic. Try yelling loudly next to the bowl, and you may be able to make the salt jump using the vibrations from your voice.
The loud noise you make is a vibration, which is transmitted through the air, to your ear and also to the plastic. The plastic vibrates, and makes the salt crystals jump! Let's examine how sounds from a vibrating object turn into sound you hear.
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*** Awesome Puzzles:
What Am I ? Riddle.
Write the letters from the clues on the line to work out the riddle.
My first is in RAT but not in MAT
My second is in DAFT but not in DEFT
My third is in SINK but not in SANK
My fourth is in NOW but not in COW
My fifth is in BLUE but not in CLUE
My sixth is in DOWN but not in DAWN
My seventh is in WALK but not in TALK
Well..What am I ? _____________________________
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