1. aleksandr_simonov says:

In this question, it is not entirely clear what a “thought”is. The thought can be very long or very short, and their weight will vary accordingly.

Thought can be called the result of the brain, and the work done in the body leads to an increase in body weight. It is obvious that the movement of neurons and electrical impulses during signal transmission are types of work. To calculate the weight of a thought, the key task will be to count the number of thoughts over a time period. The rest of the data is available in open sources and can be refined.

So, given:

Human heat output varies depending on the type of load. For simplified calculations, the value of 100 W is usually used, while the heat output of knowledge workers is assumed to be 120 W;

A quick Google search reports that the brain consumes, and therefore allocates, 20% of the energy consumed (and released) by the body. It is obvious that with mental stress, the percentage increases (by how much – to clarify);

As you know, to increase body weight by one gram, it should be given an energy of 25 million kilowatt-hours.

I. e.

0.2*0.100 kW * 24h/25000000kwh / g = body weight increases by 0.0000000192 grams due to the work performed by the brain (per day).

It remains only to select the percentage of energy spent on, in fact, thoughts, and calculate the number of thoughts (in this case, per day) and, dividing the energy into thoughts, get energy consumption for one average thought and find the mass equivalent of this thought.

You can develop a methodology for using other data as well. For example, an unconfirmed and dubious experiment by Duncan McDougall proved that the soul weighs 21 g. It remains to find a method for calculating the specific share of mental activity in the activity of the soul as a whole.

2. ivan_erokhin says:

Not at all. Just like that. A thought is a collection of several million electrical impulses that have passed between neurons in your brain in a few milliseconds