ib physics
DESCRIPTION
IB Physics. Folders, text books, calculators. Paper 1 (Multiple Choice) Paper 2 (Extended response- some choice) Paper 3 (Options) CourseworkSL-40 hours HL-60 hours. Let’s have a ball!. Topic 1 – Physics and physical measurement. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/1.jpg)
IB Physics
![Page 2: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/2.jpg)
Folders, text books, calculators
![Page 3: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/3.jpg)
• Paper 1 (Multiple Choice)
• Paper 2 (Extended response- some choice)
• Paper 3 (Options)
• Coursework SL-40 hours HL-60 hours
![Page 4: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/4.jpg)
Let’s have a ball!
![Page 5: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/5.jpg)
Topic 1 – Physics and physical measurement
Use the syllabus particularly when
studying for examinations
![Page 6: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/6.jpg)
Ranges of sizes, masses and times
![Page 7: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/7.jpg)
Order of magnitude
We can express small and large numbers using exponential notation
The number of atoms in 12g of carbon is approximately
600000000000000000000000
This can be written as 6 x 1023
![Page 8: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/8.jpg)
Order of magnitude
We can say to the nearest order of magnitude that the number of atoms in 12g of carbon is 1024
(6 x 1023 is 1 x 1024 to one significant figure)
![Page 9: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/9.jpg)
Small numbers
Similarly the length of a virus is 2.3 x 10-8 m. We can say to the nearest order of magnitude the length of a virus is 10-8 m.
![Page 10: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/10.jpg)
Ranges of sizes, masses and times
You need to have an idea of the ranges of sizes, masses and times that occur in the universe.
![Page 11: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/11.jpg)
Size
On your paper can you write in order of decreasing size the names of 5 very small things.
![Page 12: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/12.jpg)
Size
Which is the smallest? What size is it to the nearest order of magnitude?
![Page 13: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/13.jpg)
Size
The smallest objects that you need to consider in IB physics are subatomic particles (protons and neutrons).
These have a size (to the nearest order of magnitude) of 10-15 m.
![Page 14: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/14.jpg)
Size
On your paper can you write in order of increasing size the names of 5 very large things.
![Page 15: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/15.jpg)
Size
Which is the largest? How large is it to the nearest order of magnitude?
![Page 16: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/16.jpg)
Size
The largest object that you need to consider in IB physics is the Universe.
The Universe has a size (to the nearest order of magnitude) of 1025 m.
![Page 17: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/17.jpg)
Mass
On your paper can you estimate the masses of the 5 smallest objects you wrote down earlier.
![Page 18: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/18.jpg)
Mass
What do you think the mass of the electron is?
10-30 kg!(0.000000000000000000000000000001 kg)
![Page 19: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/19.jpg)
Mass
We have already decided that the Universe is the largest object. What do you think its mass is?
1050 kg
(100000000000000000000000000000000000000000000000000 kg)
![Page 20: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/20.jpg)
Time
Now think of 5 small time intervals
(For example, the time it takes sound to travel 1 metre is a small time interval. Can you think of smaller?)
![Page 21: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/21.jpg)
Time
Can you add order of magnitude estimates for your time intervals?
(For example, the time it takes sound to travel 1 metre is 10-3 seconds to the nearest order of magnitude)
![Page 22: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/22.jpg)
Time
The smallest time interval you need to know is the time it takes light to travel across a nucleus.
Can you estimate it?
10-23 seconds
![Page 23: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/23.jpg)
Time
What’s the longest time interval you can think of?
![Page 24: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/24.jpg)
Time
The age of the universe.
Any ideas?
![Page 25: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/25.jpg)
Time
The age of the universe.
1018 seconds
![Page 26: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/26.jpg)
Copy please!
Size10-15 m to 1025 m (subatomic particles to the
extent of the visible universe)Mass
10-30 kg to 1050 kg (electron to the mass of the Universe)
Time10-23 s to 1018 s (time for light to cross a
nucleus to the age of the Universe)
![Page 27: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/27.jpg)
A common ratio – Learn this!
Hydrogen atom ≈ 10-10 m
Proton ≈ 10-15 m
Ratio of diameter of a hydrogen atom to its nucleus
= 10-10/10-15 = 105
![Page 28: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/28.jpg)
Estimation
For IB you have to be able to make order of magnitude estimates.
![Page 29: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/29.jpg)
Estimation/Guess
What’s the difference?
![Page 30: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/30.jpg)
Estimate the following:
1. The mass of an apple
(to the nearest order of magnitude)
![Page 31: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/31.jpg)
Estimate the following:
1. The mass of an apple
2. The number of times a human heart beats in a lifetime.
(to the nearest order of magnitude)
![Page 32: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/32.jpg)
Estimate the following:
1. The mass of an apple
2. The number of times a human heart beats in a lifetime.
3. The speed a cockroach can run.
(to the nearest order of magnitude)
![Page 33: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/33.jpg)
Estimate the following:
1. The mass of an apple
2. The number of times a human heart beats in a lifetime.
3. The speed a cockroach can run.
4. The number of times the earth will fit into the sun (Rs = 6.96 x 108, Re = 6.35 x 106)
(to the nearest order of magnitude)
![Page 34: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/34.jpg)
Estimate the following:
1. The mass of an apple
2. The number of times a human heart beats in a lifetime.
3. The speed a cockroach can run.
4. The number of times the earth will fit into the sun (Rs = 6.96 x 108, Re = 6.35 x 106)
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 35: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/35.jpg)
Estimate the following:
1. The mass of an apple 10-1 kg
2. The number of times a human heart beats in a lifetime.
3. The speed a cockroach can run.
4. The number of times the earth will fit into the sun (Rs = 6.96 x 108, Re = 6.35 x 106)
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 36: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/36.jpg)
Estimate the following:
1. The mass of an apple 10-1 kg
2. The number of times a human heart beats in a lifetime. 70x60x24x365x70=109
3. The speed a cockroach can run.
4. The number of times the earth will fit into the sun (Rs = 6.96 x 108, Re = 6.35 x 106)
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 37: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/37.jpg)
Estimate the following:
1. The mass of an apple 10-1 kg
2. The number of times a human heart beats in a lifetime. 70x60x24x365x70=109
3. The speed a cockroach can run. 100 m/s
4. The number of times the earth will fit into the sun (Rs = 6.96 x 108, Re = 6.35 x 106)
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 38: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/38.jpg)
Estimate the following:
1. The mass of an apple 10-1 kg
2. The number of times a human heart beats in a lifetime. 70x60x24x365x70=109
3. The speed a cockroach can run. 100 m/s
4. The number of times the earth will fit into the sun (6.96 x 108)3/(6.35 x 106)3 = 106
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 39: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/39.jpg)
Estimate the following:
1. The mass of an apple 10-1 kg
2. The number of times a human heart beats in a lifetime. 70x60x24x365x70=109
3. The speed a cockroach can run. 100 m/s
4. The number of times the earth will fit into the sun (6.96 x 108)3/(6.35 x 106)3 = 106
5. The number of classrooms full of tea Mr Porter will drink in his lifetime.
(to the nearest order of magnitude)
![Page 40: IB Physics](https://reader033.vdocuments.us/reader033/viewer/2022061612/56813e2a550346895da80aeb/html5/thumbnails/40.jpg)
Let’s do some more estimating!