Physics equations/Equations/Blank (no equations)

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13-Temperature, Kinetic Theory, and Gas Laws

• $T_{C}=T_{K}-273.15$ converts from Celsius to Kelvins.
• $T_{F}={\frac {9}{5}}T_{C}+32$ converts from Celsius to Fahrenheit.

14-Heat and Heat Transfer

• $Q=mc_{S}\Delta T$ is the heat required to change the temperature of a substance of mass, m. The change in temperature is ΔT. The specific heat, c_S, depends on the substance (and to some extent, its temperature and other factors such as pressure). Heat is the transfer of energy, usually from a hotter object to a colder one. The units of specfic heat are energy/mass/degree, or J/(kg-degree).
• $Q=mL$ is the heat required to change the phase of a a mass, m, of a substance (with no change in temperature). The latent heat, L, depends not only on the substance, but on the nature of the phase change for any given substance. L_F is called the latent heat of fusion, and refers to the melting or freezing of the substance. L_V is called the latent heat of vaporization, and refers to evaporation or condensation of a substance.

16-Oscillatory Motion and Waves

• $x=X\cos {\frac {2\pi t}{T}}$ describes oscillatory motion with period T. The amplitude, or maximum displacement is $X$. Alternative notation includes the use of $x_{0}$ instead of $X$). Using by $\omega _{0}T=2\pi$ allows us to write this in terms of angular frequency, ω₀:
• $x(t)=x_{0}\cos \left(\omega _{0}t-\varphi \right)$ , where we have introduced a phase shift to permit both sine and cosine waves. For example, $\cos \left(\omega _{0}t-\varphi \right)=\sin \omega _{0}t$.
• $\omega _{0}={\sqrt {\frac {k_{s}}{m}}}={\frac {2\pi }{T}}$ holds for a mass-spring system with mass, m, and spring constant, k_s.
• $\omega _{0}={\sqrt {\frac {g}{L}}}={\frac {2\pi }{T}}$ holds for a low amplitude pendulum of length, L, in a gravitational field, g.
• $PE={\frac {1}{2}}k_{s}x^{2}$ is the potential energy of a mass spring system. This equation can also be used for a pendulum if we replace the spring constant $k_{s}$ by an effective spring constant $k_{eff}=mg/L$.

27-Wave Optics

===28-Special Relativity=== <section begin=28-Special_Relativity/> <section end=28-Special_Relativity/> ===29-Introduction to Quantum Physics=== <section begin=29-Introduction_to_Quantum_Physics/> <section end=29-Introduction_to_Quantum_Physics/> ===30-Atomic Physics=== <section begin=30-Atomic_Physics/> <section end=30-Atomic_Physics/> ===31-Radioactivity and Nuclear Physics=== <section begin=31-Radioactivity_and_Nuclear_Physics/> <section end=31-Radioactivity_and_Nuclear_Physics/> ===32-Medical Applications of Nuclear Physics=== <section begin=32-Medical_Applications_of_Nuclear_Physics/> *foo <section end=32-Medical_Applications_of_Nuclear_Physics/> ===33-Particle Physics=== <section begin=33-Particle_Physics/> *foo <section end=33-Particle_Physics/> ===34-Frontiers of Physics=== <section begin=34-Frontiers_of_Physics/> *foo <section end=34-Frontiers_of_Physics/>