1 joule is equal to how many erg

• A Joule (J) is the standard unit of energy in the International System of Units (SI). Here’s a detailed point-wise exploration of the Joule:

1. Definition:

• A Joule is the amount of energy transferred when a force of one newton is applied over a distance of one meter.
• Mathematically, 1 Joule = 1 Newton * 1 meter (1 J = 1 N·m).

  2. SI Unit:

• The Joule is the SI unit for energy, work, and heat.

It is named after the English physicist James Prescott Joule.

3. Fundamental Units:

• In terms of fundamental SI units, a Joule is equivalent to one kilogram meter squared per second squared (1 J = 1 kg·m²/s²).

  4. Relation to Other Units:

• 1 Joule is equal to 1 watt-second (1 J = 1 W·s).
• 1 Joule is also equal to 0.239 calories (1 cal = 4.184 J).

  5. Examples in Daily Life:

• Lifting an apple weighing about 100 grams to a height of 1 meter uses approximately 1 Joule of energy.
• A 60-watt light bulb uses 60 Joules of energy per second.

  6. Applications:

• Joules measure the energy released or consumed in physical, chemical, and biological processes.
• They are used in fields such as physics, engineering, chemistry, and environmental science.

  7. Conversion Factors:

• 1 Joule = 0.000278 kilowatt-hours (kWh).
• 1 Joule = 0.7376 foot-pounds (ft·lb).
• 1 Joule = 9.8692 x 10^-4 BTU (British Thermal Units).
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