How do i do dimensional analysis

Base Quantities and Base Unit s (you need these to figure out which unit to use in the questions)

Length - meter (m)

Mass - kilogram (kg)

Time - second (s)

Electric - Current ampere (A)

Temperature - kelvin (K)

Amount of Substance - mole (mol)

Luminous Intensity - candela (cd)

1. You already have the equation for density ⇒ m/v.

mass= kg

v= length×length×length⇒ m³

so your equation is kg/m³

It's the same procedure for the rest.

I hope that actually makes sense

c)as speed changes, wavelength and frequency change.

everything changes!