Helpmyphysics

Hi Physics lovers, here are the answers to the homework problems 1.24 to 1.29

1.24 Displacement = -30.6m so depth = 30.6m
1.25 Displacement = -0.82m so height dropped = 0.82m

1.26 (a) 0m/s
(b) 10m
(c) -14m/s ie 14m/s going down
(d) 2.86s

1.27 (a) From the instant it is released it will be subject to negative acceleration -9.8m/s2 So its velocity will decrease to zero and then increase negatively until it strikes the ground.
(b) Displacement = -32.1m so height = 32.1m
(c) Final velocity = -25.4m/s
1.28 (a) 1.53s
(b) 11.5s
(c) 14.7m

1.29 (a) 6.1s
(b) 183.7m

Mr Mallon

Jamie Lang of Mr Mallon`s Physics class shows how to measure the speed of sound using two microphones attached to an electronic timer.
The distance between the microphones was 1 metre.

Download speed of sound worksheet here.

Ever wondered which is faster between light and sound?

Well our new standard grade physics class along with our technician Mr McKenna set out to race sound and light.
We used a special machine that activated a flash lamp when it detected sound. So the light flashed at the same time as the sound was created.

Can you think of anything in nature where sound and light are created at the same time?
Who will win the race. Check out the video!

During my visit to CERN I had the privilege to speak to particle physicist Rolf Landau. Rolf gave our sixteen strong Scottish physics teachers (plus about fifty English physics teachers) three lectures on the history of particle physics.
Rolf also hosted a couple of question and answer sessions about various aspects of what is happening at CERN.

It was Rolf`s introduction about the curiosity that is needed to become a great physicist that caught my imagination.
I took the opportunity to ask him to record that advice to the many Scottish young people who are about to take up Physics.
You`ll find the recording below.

Rolf works on antimatter and was a consultant to Dan Brown`s Angels & Demons movie.

CERN EDUCATION

 

 Standard Podcast [0:59m]: Play Now | Play in Popup | Download

Hi Physics luvvers! Here is your last Nasty Nine of the season. Remember it is only nasty if you have not studied;-)

Started Standard Grade Physics with my new S3.
We thought about what we would explore on our two year journey as though we were embarking on a similar journey into space.

As a class we wrote down what areas of knowledge and expertise would be needed to make the space journey successful.

Well what we wrote down was remarkably like the topics we will be studying over the next few years.

Well done S3 and the best of luck for your Standard Grade journey into physics.

Colliding Particles – Episode 2: Big Bang Day from Mike Paterson on Vimeo.

OK so you have chosen to study physics over the next two years at Standard grade or have chosen Intermediate 1,2 or are even crashing the Higher.

Congratulations! You have chosen a cracking good subject in physics and I wish you well.

Want to see top class physicists in action? Then follow this brilliant series documenting the lives of physicists working at the Centre of European Nuclear Research (CERN) in Geneva Switzerland.

I had the great privilege of visiting CERN last week along with 15 other physics teachers from all over Scotland. It was great to see people from all over the world working on the great mysteries of the Universe.

Who knows that by the end of your school physics you could be on your way too to answering the great questions of science.

Colliding Particles

Here is a sketch of Albert Einstein by Joe McGlone.
Joe is a third year pupil in my physics class.
I think it is a cracking good likeness and has caught something of the great man.
Well done Joe.

The distances in space are far too large to be measured in kilometres. It is a bit like marking the road distances in millimetres.
Instead astronomers use the light year. The light year is the distance a beam of light travels in one year.

You can use the fantastic Wolframalpha website to explore the distances in space and on Earth in terms of how quickly a beam of light will take to cover he distance.
All you have to do is type into the box light year. You will find the distance a light year in metres.

Try typing in:
Glasgow to Paris. You can equate the distance in terms of how long it would take light to travel this distance = 2.99milliseconds. So we could say that Paris is about 3 milli-light-seconds from Glasgow.
Try typing in Earth to Mars you`ll find that the distance between Earth and Mars is 9.6 light-minutes.

You can download a special worksheet which you can use with Wolfram Alpha.

Download worksheet here. (pdf)
WolframAlpha

Have fun converting distances into lightyears, lightminutes or even lightmilliseconds.

I hope you have completed your bootcamp question booklet and you now have to complete your Easter revision booklet.
I will post the answers over the holidays, so keep looking at the Standard Grade Zone.

Anyway have a happy Easter holiday but remember to work hard.

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