In words: Work is equal to the force that is exerted times the distance over which it is exerted. In equation form: work (joules) = force (newtons) x distance (meters) , where a joule is the unit of work, as defined in the following paragraph.
What is the equation for joules?
In words: Work is equal to the force that is exerted times the distance over which it is exerted. In equation form: work (joules) = force (newtons) x distance (meters) , where a joule is the unit of work, as defined in the following paragraph.
What is a joule in SI units?
In the SI system, the unit of work or energy is the Joule (J). One Joule represents the work done by a force of 1 Newton moving 1 m in its own direction.
What is a joule in simple terms?
Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 10 7 ergs, or approximately 0.7377 foot-pounds.
What is a joule in chemistry?
The SI unit of energy, work, and heat is the joule (J). A joule is a tiny amount of energy. For example, it takes about 4 J to warm 1 mL of H 2 O by 1°C. Many processes occur with energy changes in thousands of joules, so the kilojoule (kJ) is also common.
What is Watt formula?
The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second. For example, a 60-watt light bulb uses 60 joules per second.
How do you calculate joules to heat water?
Answer: The specific heat capacity of water is (roughly) 4.184 kilojoules / kg K . (10 kg) × (40 degrees Celsius temperature change) × (4.184 kJ / kg K) = 1673.6 kilojoules.
How much energy is in a joule?
1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter . 1 Watt is the power from a current of 1 Ampere flowing through 1 Volt. 1 kilowatt is a thousand Watts. 1 kilowatt-hour is the energy of one kilowatt power flowing for one hour.
What is SI unit of power?
The SI unit of power is the watt (W) , in honor of Scottish inventor James Watt (1736 – 1819). ... One watt equals one joule per second (W = J / s).
Is newton a unit?
The SI unit of force is the newton , symbol N. The base units relevant to force are: The metre, unit of length — symbol m.
What are some examples of joule?
Everyday examples of the Joule. the energy required to lift a small apple one meter straight up. the energy released when that same apple falls one meter to the ground. the energy released as heat by a quiet person, every hundredth of a second.
Is higher joules better?
All about the joules
Generally, the more joules the better , as this means the device can handle one large surge, or multiple smaller surges, before your gear is in danger.
Is watt and joule same?
Watts are defined as 1 Watt = 1 Joule per second (1W = 1 J/s) which means that 1 kW = 1000 J/s. A Watt is the amount of energy (in Joules) that an electrical device (such as a light) is burning per second that it’s running.
What is the symbol for joule?
The joule ( symbol J ) is the SI unit of energy—a measure of the capacity to do work or generate heat. One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m).
What is a Newton equal to?
Newton, absolute unit of force in the International System of Units (SI units), abbreviated N. ... One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of about 0.2248 pound in the foot-pound-second (English, or customary) system.
Who named joule?
It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).
