First law = Law of Inertia.

Current measured in Amperes.

V = I × R (Ohm Law).

Sound needs medium, not vacuum.

Using v² = u² - 2gh, where final velocity v = 0, u = 40 m/s, g = 10 m/s². We get h = 1600/20 = 80 m

Newton is a derived unit (kg⋅m⋅s⁻²). Ampere, Kelvin, and Mole are SI base units

Using v² = u² + 2as, where v = 0, u = 20 m/s, a = -5 m/s². We get s = 400/10 = 40 m

Pascal (Pa) is the SI unit of pressure, equal to 1 N/m²

Rainbows form due to refraction of sunlight entering water droplets and dispersion of different wavelengths

According to law of reflection, angle of incidence equals angle of reflection