Blue light has shorter wavelength and is scattered more by atmospheric molecules (Rayleigh scattering)

Lorentz force F = q(v × B). When v is parallel to B, the cross product is zero, so no force acts

Vertical component of velocity: u_y = 20 sin(45°) = 20/√2 = 10√2 m/s. Maximum height h = u_y²/(2g) = (10√2)²/(2×10) = 200/20 = 10 m.

The first law of thermodynamics (ΔU = Q - W) states that energy cannot be created or destroyed, only transferred. It is based on conservation of energy.

Using transformer equation: V_s/V_p = N_s/N_p. Therefore V_s = V_p × (N_s/N_p) = 220 × (100/500) = 220 × 0.2 = 44 V.

Momentum = mass × velocity = kg·m/s. Impulse = force × time = N·s = (kg·m/s²)·s = kg·m/s. Both have equivalent units.

Stars appear as point sources. Turbulent layers in the atmosphere refract starlight randomly, causing intensity variations (twinkling). Planets appear as extended sources, so refraction averaging effect minimizes visible twinkling.

Carnot efficiency: η = 1 - (T_cold/T_hot) = 1 - (300/400) = 1 - 0.75 = 0.25 = 25%. This is the theoretical maximum for any heat engine.

At critical angle θ_c, refracted ray becomes parallel to the interface. Beyond this angle, no refraction occurs; light completely reflects back into the denser medium (total internal reflection). This principle enables fiber optics.

Young's modulus is a material property independent of the wire's dimensions or elastic deformation state. It depends only on the material composition and atomic structure, not on physical changes.