Constants

• What is the value of gravitational acceleration (g)?

  9.81 m s⁻²
• What is the charge of an electron (e)?

  1.60 × 10⁻¹⁹ C
• What is the speed of light (c)?

  3.00 × 10⁸ m s⁻¹
• What is Planck's constant (h)?

  6.63 × 10⁻³⁴ J s
• What is Avogadro's number (Nₐ)?

  6.02 × 10²³ mol⁻¹
• What is the gas constant (R)?

  8.31 J mol⁻¹ K⁻¹
• What is the gravitational constant (G)?

  6.67 × 10⁻¹¹ N m² kg⁻²
• What is the permittivity of free space (ε₀)?

  8.85 × 10⁻¹² F m⁻¹
• What is the mass of an electron (mₑ)?

  9.11 × 10⁻³¹ kg
• What is the mass of a proton (mₚ)?

  1.673 × 10⁻²⁷ kg
• What is the mass of a neutron (mₙ)?

  1.675 × 10⁻²⁷ kg
• What is the atomic mass unit (1 u)?

  1.661 × 10⁻²⁷ kg