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Thermometer

Theme B - The Particulate Nature Of Matter

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Rocket

Theme A - Space, Time & Motion

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Water Wave

Theme C - Wave Behaviour 

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Magnifying Glass Tilted Right

Theme D - Fields

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Microscope

Theme E - Nuclear & Quantum Physics

<ul>
	<li>
	Definition: Pressure (P) is the force (F) divided by the area (A) it&#39;s acting on. P=\(\frac FA\)
	</li>
	<li>
	It exists in solids, liquids, and gases.
	</li>
</ul>

<ul>
	<li>The weight (W) of a solid pushes down onto the surface it&#39;s on.</li>
	<li>For example, think about a heavy box on your wooden floor. Its weight (gravity&#39;s pull on it) causes pressure on the floor. P = \(\frac WA\)</li>
</ul>

Pressure (P) in a liquid is influenced by:

<ul>
	<li>How deep (h) you go.</li>
	<li>The liquid&#39;s density (&rho;).</li>
	<li>The gravity (g) acting on it.</li>
</ul>

So, the deeper you dive into the ocean, the higher the pressure you&#39;ll feel. That&#39;s why divers have to be careful! P = &rho;gh

<ul>
	<li>
	Gas molecules love to move! They hit container walls, bouncing off and transferring momentum.
	</li>
	<li>
	Pressure in gases depends on:

	<ul>
		<li>Number of gas particles.</li>
		<li>Container volume.</li>
		<li>Gas temperature.</li>
	</ul>

	Think of a soda can. If you shake it, the gas builds up pressure, and when you open it... POP!
	</li>
</ul>

<ul>
	<li>Cycling Time! 🚴
	<ul>
		<li>A cyclist puts 800N force on a 6.5cm x 2.5cm pedal.</li>
		<li>Pressure = 8000.065&times;0.0250.065&times;0.025800​ = 4.9 x 105105 Pa.</li>
		<li>It&#39;s like having 5 atmospheres pressing on a tiny pedal spot!</li>
	</ul>
	</li>
</ul>

<ul>
	<li>Listen Up! 🦻

	<ul>
		<li>Quietest sound we can hear = air pressure change of about 2 x 10&minus;510&minus;5 Pa.</li>
		<li>On an eardrum of diameter 9mm, that&#39;s a force of around 10&minus;910&minus;9 N.</li>
		<li>So our ears are super sensitive, detecting even the tiniest forces!</li>
	</ul>
	</li>
</ul>

<ul>
	<li>Ice Skating Magic ⛸

	<ul>
		<li>Skater pushes with 1.2kN on the skate with a tiny contact area.</li>
		<li>Pressure = 1.21037.010&minus;47.0x10&minus;41.2x103​ (You do the math! 😉)</li>
	</ul>
	</li>
</ul>

<ul>
	<li>
	Ancient Chinese Balloons: Used around 300CE for signalling.
	</li>
	<li>
	French Revolution of Ballooning:

	<ul>
		<li>1783, Montgolfier brothers show off with hot air balloons. They even made a sheep, duck, and cockerel fly!</li>
		<li>Principle? Hot air expands and is lighter. If the balloon is lighter than the air outside, it goes up!</li>
	</ul>
	</li>
	<li>
	Gas Laws &amp; Ballooning:

	<ul>
		<li>Jacques Charles (yep, Charles&#39;s Law) liked using hydrogen for buoyancy. It was the rage until...BOOM! Hydrogen&#39;s flammable nature caused accidents.</li>
		<li>Today, we enjoy views from helium balloons. They&#39;re safe, and you don&rsquo;t risk sounding like Mickey Mouse.</li>
	</ul>
	</li>
</ul>

<ul>
	<li>
	Boyle&#39;s Law (1662): Pressure and volume have a unique relationship.
	</li>
	<li>
	Charles&#39;s Law &amp; Pressure Law (1802 by Gay-Lussac): Talked about temperature&#39;s effect on gases. Jacques Charles observed it earlier but kept his discovery a secret!
	</li>
</ul>

Remember: Pressure is everywhere! Whether you&#39;re pushing down on your bike pedals, diving deep underwater, or enjoying a fizzy drink. Always keep an eye (and ear!) out for pressure in action! 🌌🚀🎉

Theme B - The Particulate Nature Of Matter

Understanding Pressure: Solids, Liquids, and Gases Explained

Table of content

PRESSURE - what's the deal? 🤔

Solids 🧱

Liquids 🥤

Gases 🎈

Unlock the Full Content!

Theme B - The Particulate Nature Of Matter

Understanding Pressure: Solids, Liquids, and Gases Explained

Table of content

PRESSURE - what's the deal? 🤔

Solids 🧱

Liquids 🥤

Gases 🎈

Unlock the Full Content!