1. What is unit? Write down the units of mass, temperature, power and density. 2. Write any three differences between fundamental units and derived units?

3. What is SI system? Why has SI system been developed? Give reasons?

4. What is the unit of pressure? Why is it called a derived unit? Give reasons.

The standard chosen for measurement is unit . unit of mass is kilogram (kg)

unit of temperature is Kelvin (k) unit of power is watt(w)and density is kg\m3(kilogram

per cubic meter)

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

yo yo yo its papaguy in the house lol

okay, ima .

um it shows links to uh so kinda microsoft website is that were ima go or no? ?