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9702 · 4.3

Density and pressure

Welcome to the world of **Density and Pressure**! These fundamental concepts help us understand everything from why ships float to how hydraulic brakes work. We'll explore how **mass** and **volume** define density, how **force** and **area** create pressure, and the mysterious upward push known as **upthrust** in fluids. This pilot aligns with **Senpai Corner** AS notes (2025-2027) for topic **4.3**.

Need to know

What you need to know

  • Density ($\rho$) is the mass ($m$) per unit volume ($V$) of a substance.
  • The formula for density is $\rho = \frac{m}{V}$.
  • The standard SI unit for density is kilograms per cubic meter (kg m^{-3}).
  • Density is an intrinsic property of a material.

Explanation

Density and pressure

  1. Density ($\rho$) is the mass ($m$) per unit volume ($V$) of a substance.
  2. The formula for density is $\rho = \frac{m}{V}$.
  3. The standard SI unit for density is kilograms per cubic meter (kg m^{-3}).
  4. Density is an intrinsic property of a material.
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