Oscillations and mechanical waves

[meech-ward]

Learning Material

• Khan Academy
• Crash Course
• Brilliant.org wave wiki
• Physics Classroom sound waves

Distributed Practice

• Varsity Tutors

Distributed Practice questions answered correctly:

• [ ] 1
• [ ] 2
• [ ] 3
• [ ] 4
• [ ] 5

Quiz

• [ ] Varsity Tutors

[meech-ward]

Good reference for this section: https://www.khanacademy.org/science/physics/work-and-energy/hookes-law/a/what-is-hookes-law

[meech-ward]

Videos

• Simple harmonic motion
• Simple harmonic motion (with calculus)

Practice

• Questions 1-3

[meech-ward]

Videos

• Introduction to waves
• Properties of periodic waves https://www.khanacademy.org/science/physics/mechanical-waves-and-sound

Practice

• Questions 4-6 & last(frequency)

A block of mass 1.3 kg is attached to a spring whose force constant, $\displaystyle k$, is $\displaystyle 250 \:\frac{N}{m}$.  What is the frequency and period of the oscillations of this spring-block system?

[meech-ward]

Videos like The equation of a wave are unnecessary to watch if you're comfortable with trigonometry.

[meech-ward]

Today and yesterday I worked on the start of oscillations and waves. A lot of it is trigonometry, which I am very comfortable with, so it's just a bit of review. It's nice to see it used in the real world though. I feel that it would have been nice to have a better understanding of calculus before taking physics too. I might try to complete the khan differential and integral calculus courses before continuing on with more advanced physics after this physics course.

Next time, on to sound https://www.khanacademy.org/bigbingo_redirect?continue=https%3A%2F%2Fwww.khanacademy.org%2Fscience%2Fphysics%2Fmechanical-waves-and-sound%2Fsound-topic%2Fv%2Fproduction-of-sound&conversion_ids=condensed_tutorial_title_click

[meech-ward]

Today I learned about sound wavelengths, periods and the speed of sound. There are 4 video's at the beginning of this section that kind of introduce sound. I think it would be good to do some practice about sound properties after watching the 4th video which I'm doing next time.

next time: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/sound-topic/v/relative-speed-of-sound-in-solids-liquids-and-gases

[meech-ward]

A cool resource for more on sound as a mechanical wave http://www.physicsclassroom.com/class/sound/Lesson-1/Sound-is-a-Mechanical-Wave

[meech-ward]

I completed the 4 sound videos, this resource is great for more information and practice questions: http://www.physicsclassroom.com/class/sound/Lesson-2/The-Speed-of-Sound

[meech-ward]

today I learned more about the speed of sound and did some practice questions about that. I also larned about decibels and mach

next time Why do sounds get softer?