The unit of power in the SI system is the Watt, which is defined as one Joule per second.

The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².

The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².

The SI unit of pressure is Pascal (Pa), defined as one newton per square meter (N/m²).

The unit of rate constant for a second-order reaction is L/(mol·s).

The unit of resistance in the SI system is the Ohm (Ω).

The unit of resistance is Ohm, which is defined as the resistance between two points when a constant potential difference of one volt produces a current of one ampere.

The unit of resistivity is Ohm-meter (Ω·m).

Sound intensity is measured in decibels (dB).

The unit of surface tension is Newton per meter (N/m).

Surface tension is defined as force per unit length, hence its unit is Newton per meter (N/m).

The gas constant R is commonly expressed in the unit L·atm/(K·mol).

The unit of the magnetic field as defined by the Biot-Savart Law is Tesla.

The unit of the magnetic field is Tesla (T), which is derived from the Biot-Savart Law.

The unit of the rate constant for a first-order reaction is s⁻¹.

The unit of the rate constant for a second-order reaction is L²/mol²·s.

The unit of thermal conductivity is Watts per meter per Kelvin (W/m·K).

The unit of torque in the SI system is Newton-meter (Nm).

The SI unit of work is Joule (J).

Young's modulus is defined as stress divided by strain and is measured in Pascals (Pa).

Unit vector = (3, 4) / √(3^2 + 4^2) = (3/5, 4/5).

Unit vector = (3, 4, 0) / √(3^2 + 4^2) = (3, 4, 0) / 5 = (0.6, 0.8, 0).

Unit vector = (4/5, 3/5) where magnitude = √(4^2 + 3^2) = 5

Unit vector = (4/5, 3/5) since magnitude = 5.

Unit vector = v / |v| = (3, 4) / 5 = (0.6, 0.8)

Unit vector = A / |A| = (3, 4) / 5 = (0.6, 0.8).

Unit vector = A / |A| = (4i + 3j) / √(4^2 + 3^2) = (4i + 3j) / 5 = (4/5)i + (3/5)j.

Magnesium has a valency of 2, as it can lose two electrons.

Oxygen has a valency of 2, as it needs two electrons to complete its outer shell.

Using the binomial theorem, (1 + 2)^5 = 3^5 = 243.