Explanation

SI (International System of Units) fundamental units include meter (length), kilogram (mass), and second (time).

All other units like Newton, Joule, etc., are derived from these base units.

Explanation

Antoine Henri Becquerel was an engineer, physicist, Nobel laureate,

First person to discover evidence of radioactivity.

 He belonged to France.

Explanation

The SI unit of electric charge is the coulomb, represented by the symbol C.

One coulomb is the amount of charge that passes through a conductor carrying one ampere of current for one second.

It's also equal to the charge of about 6.24 quintillion electrons or protons.

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

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