Light is affected by black holes because of the theory of general relativity, which states that any massive object warps the spacetime around it. Since a photon travels by the shortest distance between two points, light appears to bend...

In this video, we'll look at:<br/>
- What the early atmosphere was li<br/>ke on earth
- How that atmosphere changed t<br/>o be suitable for life
- The processes responsible for features of the earth we see today

This video covers: - Collision theory, and how it relates to the rate of reaction - The effect of temperature - The effect of concentration and pressure - The effect of surface area - The effect of catalysts

Why on earth does your brain take you on wild adventures when you sleep? What purpose does dreaming serve? Well, come take a deep dive into the mysterious world of dreams with me. From ancient beliefs about divine messages to Freud's...

Weird History Food is opening up a bag of the history of Oreos. Oreo cookies are one of the most recognizable cookies in the world. We're going to show you the entire history of Oreo, not to mention its rival Hydrox, and explore every...

Dr. Forrester defines the terms: molecule and compounds. She explains that every substance of matter is made up of atoms, and she discusses Dalton’s atomic theory.

With various environments better understood, it's now time to look at specific types of organisms. Let's start with plants, also known as flora. We learned about these in the botany series, but now let's contextualize some of that...

Role congruity theory proposes that a group will be positively evaluated when its characteristics are recognized as aligning with that group's typical social roles.

Conventional current and electron flow. In this video we briefly learn the difference between conventional current and electron flow. We learn how the electron was discovered and why battery terminals are positive and negative. What is...

The traditional way we approached the cause and treatment of depression is to see it as a chemical imbalance. That is you have in sufficient amounts of the neurotransmitters serotonin, norepinephrine and dopamine and low...

Social facilitation is a social phenomenon in which being in the presence of others improves individual task performance. That is, people do better on tasks when they are with other people rather than when they are doing the task alone.

Depression affects millions of people. We’ve developed lots of medication treatments and even therapy treatment, but despite this, about a third of people don’t respond to these treatments and remain depressed. Today I’m going to tell...

Mr. Beat explains the Great Replacement Theory and how manipulative propaganda fools us into believing white nationalist talking points.

In this video I talk about the German two-way prepositions (Wechselpräpositionen). <br/>

Price gouging during a crisis is universally frowned upon and punishable by law in most states... so why would economists say it's actually not a bad thing?

What is the Diffusion of Innovations Theory? Diffusion of innovations is a theory that seeks to explain how, why, and at what rate new ideas and technology spread. The theory was popularized by Everett Rogers in his book Diffusion of...

What is Dialogic Organization Development? Dialogic Organization Development is a compelling alternative to the classical action research approach to planned change. Organizations are seen as fluid, socially constructed realities that...

What is Conflict Theory? Conflict theories are perspectives in sociology and social psychology that emphasize a materialist interpretation of history, dialectical method of analysis, a critical stance toward existing social arrangements,...

What is Balance Theory, also known as Cognitive Balance? Cognitive balance theory was devised by Heider (1946, 1958) to explain how people resolve inconsistencies in their interpersonal affects. For example, if a person p likes another...

What is Attribution Theory? Attribution is a term used in psychology which deals with how individuals perceive the causes of everyday experience, as being either external or internal. Models to explain this process are called Attribution...

What is Adaptive Expectations Theory? In economics, adaptive expectations is a hypothesized process by which people form their expectations about what will happen in the future based on what has happened in the past.

What is the Acceptance Theory of Authority? Acceptance theory of authority states that a manager's authority rests on workers' acceptance of his right to give orders and to expect compliance. Workers have to believe that the manager can...

What is the Theory of Constraints? The theory of constraints is a management paradigm that views any manageable system as being limited in achieving more of its goals by a very small number of constraints.

What is Theory E? What is Theory O? Theory E is change based on economic value. Theory O is change based on organizational capability. Both are valid models; each theory of change achieves some of management's goals, either explicitly or...