Posts Tagged ‘volume’

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Sound Math 1: Good Vibrations!

May 1, 2019

There is so much maths around sound, but sound is simple.

Sound is made by something vibrating in air. The vibrations create waves and these pressure waves hit your ear.

Projects Studio Handbook HARMONICS

This is a vibration plate. Sand collects in the areas which do not vibrate and create patterns. The patterns are called CHLADNI figures.

In fact, the sand collects in places where standing waves – waves that cancel each other out – form. The rest of the plate is vibrating and making the sound.

You will find more info about this violin shaped vibration plate here.

The frequency of the sound creating this Chladni pattern is shown in Hertz Hz (no. pressure waves per second that his your ear) is shown  for each pattern. (More about frequency in following posts)

Other Sound Math:

Make a match Box sing like Sinatra

The Curious Nature of Drummers’ Brains

Headbanger Maths

Pump Up the volume or Knock, Knock Knockin on Your skull wall!

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Sound Math 2: Can you hear this high pitch sound?

April 29, 2019

One of the best summaries of sound can be found here at Maths is Fun

Other Sound Math:

Make a match Box sing like Sinatra

The Curious Nature of Drummers’ Brains

Headbanger Maths

Pump Up the volume or Knock, Knock Knockin on Your skull wall!

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Sound Math 3: How loud is LOUD?

April 27, 2019

The logarithmic equation for sound and the decibel calculator here

More here

Other Sound Math:

Make a match Box sing like Sinatra

The Curious Nature of Drummers’ Brains

Headbanger Maths

Pump Up the volume or Knock, Knock Knockin on Your skull wall!

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Sound Math 4: Make a match Box sing like Sinatra

April 27, 2019

Other Mathspig Sound Posts:

The Curious Nature of Drummers’ Brains

Headbanger Maths

Pump Up the volume or Knock, Knock Knockin on Your skull wall!

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Death by Caffeine: The Maths  Part 2 METRIC

August 20, 2018

Death by Caffeine: The Math  Part 2 USA UNITS HERE.

Caffeine content sources Caffeine Content Data Base

On April 12 2017 16-year-old Davis Cripe collapsed at school in South Carolina and died later in hospital.  In the span of two hours, Davis drank a cafe latte from McDonald’s and a large Mountain Dew, then “chugged” a 16-ounce energy drink when he got back to art class.

Here, assuming Davis drank large sized drinks, is the lethal caffeine consumption.

NOTE: Davis lived in the USA where standard drink volumes are slightly different to Australia & UK. The USA volumes are used here converted to litre and ml.

The official cause of death was “caffeine-induced cardiac event causing a probable arrhythmia,” the coroner concluded. Source: Washington Post

Caffeine can kill.

WARNING: “Mixing caffeine with alcohol is a dangerous practice because it may lead to higher levels of alcohol consumption as the person often believes and feels they are more alert,” said Dr Robert Glatter, ER doctor at Lenox Hill Hospital, NYC . “The risk of alcohol poisoning increases as people consume more alcohol because they feel the caffeine will keep them awake and alert.” Source: USA Today

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Death by Caffeine: The Math  Part 2 USA UNITS

August 20, 2018

Death by Caffeine: The Math  Part 2 METRIC HERE.

Caffeine content sources Caffeine Content Data Base

On April 12 2017 16-year-old Davis Cripe collapsed at school in South Carolina and died later in hospital.  In the span of two hours, Davis drank a cafe latte from McDonald’s and a large Mountain Dew, then “chugged” a 16-ounce energy drink when he got back to art class.

Here, assuming Davis drank the large sized drinks, is the lethal caffeine consumption. 

The official cause of death was “caffeine-induced cardiac event causing a probable arrhythmia,” the coroner concluded. Source: Washington Post

Caffeine can kill.

WARNING: “Mixing caffeine with alcohol is a dangerous practice because it may lead to higher levels of alcohol consumption as the person often believes and feels they are more alert,” said Dr Robert Glatter, ER doctor at Lenox Hill Hospital, NYC . “The risk of alcohol poisoning increases as people consume more alcohol because they feel the caffeine will keep them awake and alert.” Source: USA Today

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8b. How much blood can YOU lose and survive? ……………METRIC

August 16, 2017

The Complaint

8b: When will I EVER use this maths?

The Cause:

Students doing repetitive text book exercises without using maths to solve REAL WORLD problems.

The Solution:

You are going to use this maths NOW…………………..

……………………………………………………………………………….

How much blood can YOU lose and survive?

………….METRIC UNITS

Remember the best calculator to use is the WEB 2.0 Calculator as it shows the worked equation as you go. 

CAREERS: It’s not only health workers who need to understand these calculations, but also creatives running health campaigns online, on TV, radio and in magazines.

TOPICS: Decimals, %, algebra, vol, weight units (METRIC) 

PDF WORKSHEET HERE:How much blood can you lose and still survive? WORKSHEET METRIC