Need For Speed

- Displacement is the shortest distance travelled by a body from one point to other. It is a vector quantity. Which has both magnitude and direction. The displacement is illustrated by the given figure. Then there is distance.

Distance is a measure to find out how much area is covered by a moving body when it is travelled from one point to the other it is similar quantity , which does not have any direction only the magnitude is there in the case of the distance. The given figure will explain about the distance.

Speed is the distance that is travelled by an object. But then there is velocity where distance is travelled by an object per unit time in a certain direction. Velocity is a vector quantity, where as Speed has scalar quantity.

Science Experiment. Part 2 Paper Experiment

Science experiment:

Question: What will happen to the sound if I change the shape of a piece of paper? (e.g. from a flat shape to a funnel shape)

Links to research about Sound:

http://www.thetech.org/exhibits/online/robotzoo/guide/bats_and_echoes.html

http://www.ask.com/question/how-do-animals-hear

http://www.dosits.org/science/soundmeasurement/soundsanimalshear/

http://en.wikipedia.org/wiki/Cat_senses

http://www.pbslearningmedia.org/resource/tdc02.sci.life.reg.animalhear/animal-hearing/

Hypothesis: (What do you think will happen?) e.g. I think that it will the sound will get louder and quieter every time I change the directions.

Materials needed:

A Flat Paper, Your self, Tape, and a tissue.

Experiment (procedure):

e.g. Step 1 - First hold a flat piece of paper against your ear. Block your other ear with your hand. Get your partner to speak to you. What is the sound like? Can you hear clearly?

Step 2 - Next, roll the piece of paper into a funnel shape. Put the funnel against your ear. Face the funnel towards your partner and listen to them speak. What does it sound like? Can you hear clearly?

Step 3 - Next, face the funnel to the side while your partner speaks to you. Does it make a difference to the sound that you can hear?

Step 4 - Put some cotton balls or tissue paper into the funnel to block one end. Does it make a difference to the sound you hear? Is the sound quality the same?

Step 5 - Next, roll the piece of paper up and face one end of the paper roll towards your partner. Listen to your partner speak. Is there a difference to the sound you hear?

Step 6 - Finally, turn to the side with your paper roll and listen to your partner speak. What is the sound like?

Data (What happened?)

	Shape/object/materials	Results:
1	flat piece of paper	clearer? Didn’t make any difference.
2	funnel facing to the front towards partner	It actually sounds really loud
3	funnel facing to the side (opposite partner)	Its more quieter than when it was facing towards my partner.
4	cotton ball blocking funnel	I could hear echos
5	rolled up piece of paper (facing to the front)	It was really loud. It even made my ears hurt.
6	rolled up piece of paper (facing to the side)	It was normal.

Observations:

When I put the flat piece of paper to my ears it did not make any difference. But then when I got to fold it, it finally made quite louder sound. As I switched the funnel to the opposite side of my partner It was more quieter than when it was facing towards my partner. Then it was time to put the tissue in it and the weird thing was that all I could hear was echos. The rolled piece of paper - It was REALLY Loud, and it even made my ears hurt. Then it was finally the rolled up piece of paper (facing to the side) Which was normal.

Conclusion:

Just like my hypothesis said. And my Observation. Every time I had switched my funnel to the opposite side of my partner it was quieter and different.

Science Experiment

Science experiment:

Question: What will happen to the sound if I cut the straw shorter?

Links to research about Sound:

e.g. http://www.physicsclassroom.com/class/sound  

http://www.universetoday.com/61166/what-is-sound/

http://en.wikipedia.org/wiki/Sound

Hypothesis: (What do you think will happen?) e.g. I think that the sound will get higher.

Materials needed:

Scissors, Myself, Straw.

Experiment (procedure):

e.g. Step 1 - Creased the straw 2-3cm.

Step 2 - Then using the scissors again cut the end of the straw into a triangle.

Step 3 - Put the triangle shape into your mouth and blow,

Step 4 - Cut the straw shorter.

Step 5 - Blow the straw on the cut end. Then listen to what the sound makes.

Data (What happened?) Observation

Length:                                           Results:

Long 15cm	makes a sound
10cm	sound was higher
5cm	sound was high pitched

Observation

Long 15cm: When we first received our straws. The sound was very low

10cm:  The sound got higher.

5cm:  The was High Pitched.

Conclusion:

I have realised that when you cut the straw shorter. The sound will get Higher and higher every moment you cut it.