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Physics

Why Is Radioactive Decay Random and Spontaneous?

Learn why radioactive decay is random for individual nuclei yet predictable for large samples, and why no external trigger is required in IB Physics.

E.3 Radioactive decay

How Do You Use Mass-Energy Equivalence (E = mc²) in Nuclear Reactions?

Learn how to calculate energy released or absorbed in nuclear reactions from mass defect using E = mc², atomic mass units, MeV and IB exam conventions.

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Every question IB students actually ask.

Physics

Why Is Radioactive Decay Random and Spontaneous?

How Do You Use Mass-Energy Equivalence (E = mc²) in Nuclear Reactions?

MYP Subjects

Physics

Why Is Radioactive Decay Random and Spontaneous?

How Do You Use Mass-Energy Equivalence (E = mc²) in Nuclear Reactions?

Why Is Compton Scattering Considered Stronger Evidence for Photons Than the Photoelectric Effect?

What Is Nuclear Binding Energy and Mass Defect?

How Does Binding Energy per Nucleon Vary with Nucleon Number; and What Does That Curve Tell You?

What Is the Strong Nuclear Force?

What Are Isotopes?

What Is Compton Scattering and What Does It Prove About Light?

How Do You Calculate the Wavelength Shift in Compton Scattering?

What Is Electric Potential Difference (Voltage)?

What's the Difference Between a Conductor and an Insulator at the Particle Level?

How Do You Calculate Electric Current (I = Δq/Δt)?

What Is the Work Function of a Metal?

What Is Wave-Particle Duality?

How Does Electron Diffraction Prove Matter Has Wave Properties?

How Do You Use Einstein's Photoelectric Equation (Emax = hf - Φ)?

What Is Threshold Frequency in the Photoelectric Effect?

What Is the Photoelectric Effect and Why Couldn't Classical Wave Theory Explain It?

What Are the Discrete Energy Levels in the Bohr Model of Hydrogen? (HL)

Why Does the Bohr Model Fail for Atoms Other Than Hydrogen? (HL)

How Does Angular Momentum Quantization Explain the Bohr Model? (HL)

What Causes Electrical Resistance?

How Do You Calculate Resistivity?

How Do You Calculate the Distance of Closest Approach in a Scattering Experiment? (HL)