What is a Joule Second? - Explained Easily!

[cnidocyte]

I can easily picture joules per second (I just see light of varying intensities passing a point at varying rates) I don't know what a joule second is. I know that Plancks constant is just to use the frequency of the photon to find out its energy but what in the name of God is a joule second?

 

[dulrich]

It is the unit of action -- as in the least action principle.

It is also the unit of angular momentum -- cf. the Bohr atom.

 

[russ_watters]

A joule in mechanical work is 1 N of force applied on an object to move it a distance of 1 m. So a joule persecond is doing the above action in one second.

Btw, a "joule per second" and a "joule second" are not the same thing. Jule per second is dividing by seconds, joule second would be multiplying by seconds.

 

[0xCACA]

[...] but what in the name of God is a joule second?

If i understood correctly you can consider this example:

you can boil 1 m^3 of water by transferring to it N*dE energy in a 1 second OR
you can boil 1 m^3 of water by heating water N*dt time with 1 joule of energy

and thus we can define minimal action needed for 1 m^3 water to be boiled -
N*dE*dt

As about Plank constant we can interpret it also like this:
you can't transfer less energy than h in 1 second OR
you can't transfer 1J of energy in less than h seconds.

 

[pmacias]

A Joule Second, also known as a Watt Second, is a unit of measurement used in physics to describe the amount of energy transferred in a given amount of time. It is equal to one Joule of energy being transferred in one second. This unit is commonly used to measure the power output of various devices, such as light bulbs or electric motors. In simpler terms, it is a measurement of the rate at which energy is being transferred. So, if a light bulb uses 60 Watts of power, it is equivalent to 60 Joules of energy being transferred every second. I hope this helps clarify the concept of a Joule Second for you.