Study Notes: SAT Physics Subject Test

Heat and Thermodynamics

Temperature scales: \small T(K)=T(^{\circ}C)+273

Temperature change: \small Q=mc \Delta T (c is the specific heat.)

Phase change: \small Q=mL (L is the latent heat of transformation.)

Thermal expansion

\small \Delta L = \alpha L_{0} \Delta T (\small \alpha is the coefficient of linear expansion.)

\small \Delta V = \beta V_{0} \Delta T (\small \beta is the coefficient of volume expansion.)

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Study Notes: AP Physics C Reference Sheet

Coulomb’s Law

Force between two point charges: \small F=\frac{Q_{1}Q_{2}}{4\pi \varepsilon _{0}R^{2}}

Electric Fields

Definition of Electric Field: \small E = \frac{F}{Q}=\frac{Q}{4\pi \varepsilon _{0}R^{2}}
For a single point: \small F=qE

Potential and Voltage

Definition of electric potential V: \small V = \frac{U}{Q}
For a constant electric field: \small E_{x}=-\frac{\Delta V}{\Delta x}
Potential due to a point charge at distance a: \small V(a)= \frac{Q}{4 \pi \varepsilon _{0}a}

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