Explanation

The ampere, symbol A, is the SI unit of electric current.

It is defined by considering the fixed  value of the elementary charge e as 1.602 176 634 x 1019,

where the unit C is equal to As and the second is defined by Δν Cs.

Explanation

• Weight is a force.
• The unit of measurement for force is the Newton (N).

Explanation

Poison dosage is measured in milligrams (mg) based on body weight.

Even a small variation in mg can determine whether a substance is safe or toxic.

Explanation

The SI unit of force is the Newton, symbol N.

The base units relevant to force are:

1. The metre, unit of length — symbol m
2. The kilogram, unit of mass — symbol kg
3. The second, unit of time — symbol s

Explanation

The SI unit of electric resistance is the ohm (Ω).

1 Ω = 1 V/A.

while

The SI unit of resistivity is an ohm-meter.

Explanation

A kilowatt hour (kWh) measures the amount of energy consumed when 1 kilowatt of power is used for 1 hour.

It is a unit of electrical energy.

Kilowatt hour is the unit of ENERGY.

Watt or Kilowatt is the unit of POWER.

Explanation

Unit of torque: newton metre (N m)

Explanation

The SI unit of radioactivity is becquerel (Bq).

Curie is a non-SI unit, with 1 curie equal to 37 billion Bq.

Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration)

It is the process by which an unstable atomic nucleus loses energy by radiation.

Three of the most common types of decay are:

• Alpha
• Beta
• Gamma decay

Explanation

The SI unit of power is the watt (W). 

Explanation: A watt is equal to one joule of work done per second. 

Key points:

Symbol: W

Definition: 1 watt = 1 joule per second

Named after: James Watt 

Explanation

Based on the search results, Velocity is not a unit.

It is a physical quantity, specifically a vector quantity, that measures the rate of displacement. 

Meter (m): This is the SI unit of length

Time: This is a fundamental physical quantity, and its SI unit is the second (s).

Kilogram (kg): This is the SI unit of mass.