# Category: Grade 11

## Fahrenheit 451 essay

## Constructive and destructive wave

A constructive wave id when two crests from opposite directions converge and the end result wave is the sum of the two crests.

A destructive wave is when a crest and a troph from opposite directions converge. the end result wave usually cancels out (no wave) or they act against each other.

How do noise-cancelling headphones use wave interference to eliminate unwanted sound?

A : The music going into the ear acts as a constructive wave. Another wave is created through the headphones that acts as the troph with the same amplitude, and the background noise acts as the crest that creates a destructive wave that cancels out any noise.

## Types of waves

Pulse wave: A pulse wave is a non-repeating wave; single disturbance.

Periodic : Periodic waves are waves that repeat at regular intervals. they require regularly repeating disturbances in order to be considered a periodic wave.

Longitudinal: A longitudinal wave is when several turns of the spring are compressed and released. The disturbance is in the same direction as the direction of travel. This wave occurs lengthwise.

Transverse: This wave occurs sideways. The spring is pulled sideways at a 90 degree angle (right angle) then released. The wave will travel across instead of lengthwise.

## Thermos challenge

## Fahrenheit 451 Reflection

Contributions : (pg.41-46)

- I completed and presented the literary luminary role.
- Created 2 discussion questions and was prepared to assist with the discussion if necessary.
- I made a total of 5 slides for the presentation with supporting images to go with each slide.
- Created the title of the presentation.

## Newton’s laws of motion

## Blog log 2

## Blog Log #1

## week 17 precalc

This week in precalc we finished our trigonometry unit with sine and cosine laws. these are fairly simple concepts knowing that it’s just a formula and a little bit of algebra. in Sine law you must remember that there can be two possibilities to an angle if it’s extraneous.

Sine law :

cosine law :

example of sine law example of cosine law