What is a joule in simple terms?
Encyclopædia Britannica, Inc. 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 107 ergs, or approximately 0.7377 foot-pounds.
Where are joules used?
The joule (pronounced DJOOL) is the standard unit of energy in electronics and general scientific applications. One joule is defined as the amount of energy exerted when a force of one newton is applied over a displacement of one meter.
What is a joule used to measure?
Scientists use the joule to measure work. One joule is equal to the work done by a force of one newton to move an object one meter in the direction of the force.
How do you calculate Joules examples?
If you multiply the number of watts by the number of seconds, you’ll end up with joules. To find out how much energy a 60W light bulb consumes in 120 seconds, simply multiply (60 watts) x (120 seconds) = 7200 Joules.
How many joules does it take to pick up an apple?
When we raise an apple up to a height of one meter, we perform approximately one joule of work.
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 H2O by 1°C. Many processes occur with energy changes in thousands of joules, so the kilojoule (kJ) is also common.
Is joules a unit of energy?
1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter.
How do you find kJ in chemistry?
Kilojoules per mole (kJ/mol) A Joule, J, SI unit is energy and is defined as one kg per m2/s2. The default kilo means 10, so a kJ = 1000 J. The total energy released or absorbed is given by : q = m × C × ΔT, when q is energy, m is mass, C is specific heat and T is temperature.
What can 1 joule of energy do?
One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass. Therefore, one joule equals one newton•meter.
Is a Joule the same as a Newton-meter?
A Joule is the same as a newton meter. Mechanical energy is usually given in Nm, and electrical and heat is usually given in Joules, but they are really the same unit. A watt is one Joule in one second, or to put it another way, a Joule is a watt-second. For comparison, a Joule is about .74 Foot Pound .
What does the name joule mean?
Origin and Meaning of Joules. A user from New Zealand says the name Joules is of Indian ( Sanskrit ) origin and means “Amazing”.
What units are used to measure Joule?
The joule (J) is the unit of measure for energy used in the International System of Units (SI), and the one accepted in scientific circles.
How do you use Joule in a sentence?
The energy applied in each pulse was 25-30 joules.