IGCSE Physics Formulae - Energy and Pressure Test

Flashcards covering key IGCSE Physics formulae, definitions, and units related to Energy and Pressure, as presented in the lecture notes.

In a magic triangle where a = b / c, how can you express 'b'?

b = a x c

In a magic triangle where a = b / c, how can you express 'c'?

c = b / a

What is the formula for calculating Weight (W)?

W = mass x gravity (m x g)

What is the approximate value of 'g' (acceleration due to gravity) in m/s² or N/kg?

9.8 m/s² or 9.8 N/kg

What is the formula for calculating Density (ρ)?

Density = mass / Volume (m / V)

What is the formula for Work done (W) or change in Energy (ΔE)?

Work = Force x distance (parallel to Force) (F x d)

What is the formula for Gravitational Potential Energy (GPE or ΔEp)?

GPE = mass x gravity x height (m x g x Δh)

What is the formula for Kinetic Energy (KE or Ek)?

KE = ½ x mass x (velocity)² (½ m v²)

What fundamental principle states that energy cannot be created or destroyed?

Law of conservation of energy

What is the formula for Power (P) in terms of work done or energy transferred and time taken?

Power = work done / time taken (ΔE / t or W / t)

What is the formula for calculating Pressure (p)?

Pressure = Force / Area (F / A)

What is the formula for calculating Pressure in Liquids (Δp)?

Pressure = density x gravity x depth (ρ x g x Δh)

What is the formula for calculating Efficiency?

Efficiency = (useful Energy (or power) output / Energy (or power) input) x 100%

What multiplier does the prefix 'Mega-' (M) represent?

x 1 000 000 (10^6)

What multiplier does the prefix 'Giga-' (G) represent?

x 1 000 000 000 (10^9)

What multiplier does the prefix 'Kilo-' (k) represent?

x 1000 (10^3)

What operation does the prefix 'milli-' (m) represent?

Divide by 1000 (10^-3)

What operation does the prefix 'Micro-' (µ) represent?

Divide by 1 000 000 (10^-6)

What operation does the prefix 'Nano-' (n) represent?

Divide by 1 000 000 000 (10^-9)

What are the standard units for Force and Weight?

Newtons (N)

What are the standard units for Mass?

grams (g), kilograms (kg)

What are the standard units for Velocity and Speed?

m/s, km/h

What is the standard unit for Acceleration?

m/s²

What is the standard unit for Power?

watts (w)

What are the standard units for Density?

g/cm³, kg/m³

What are the standard units for Pressure?

Pascals (Pa), N/cm²

What are the standard units for Work and all Energy types?

Joules (J)