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Science

# MCAT

This collection is being developed for the revised MCAT® exam that will first be administered in spring 2015. Videos will be added to the collection through fall 2014. All content in this collection has been created under the direction of the Khan Academy and has been reviewed under the direction of the Association of American Medical Colleges (AAMC). All materials are categorized according to the pre-health competencies tested by the MCAT²⁰¹⁵ exam; however, the content in this collection is not intended to prescribe a program of study for the MCAT²⁰¹⁵ exam. The content is also included in the Pre-health Collection within MedEdPORTAL’s iCollaborative sponsored by the AAMC: www.mededportal.org/pre-health *MCAT® is a program of the AAMC and related trademarks owned by the Association include Medical College Admission Test, MCAT, and MCAT²⁰¹⁵. For more information about the MCAT exam visit : www.aamc.org/mcat2015
Community Questions
Physical processes
Foundational Concept 4: Complex living organisms transport materials, sense their environment, process signals, and respond to changes using processes that can be understood in terms of physical principles.

### Vectors and scalars

4A: Find out what makes vectors different from scalars! Find out how to break vectors into components, and go over the different ways to represent vectors. By Sal.

### Newton's laws and equilibrium

4A: Go back in time and rediscover Newton's three laws! These powerful laws help explain inertia, equal and opposite forces, and calculation of acceleration based upon forces. By Sal.

### Speed and velocity

4A: Think to calculate speed and velocity, and then go on to learn about average and instantaneous speed and velocity. By Sal and David SantoPietro.

### Acceleration

4A: Learn how to calculate acceleration, and how distance, velocity, and acceleration can be related to one another using velocity graphs. By Sal.

### Force of tension

4A: Discover the force of tension and how we can use it to solve very interesting problems! By Sal.

### Normal forces

4A: Learn about the normal force, and try some examples that demonstrate how the normal force is affected by the motion of an elevator, as well as how the normal force affects friction. By Sal.

### Forces on inclined planes

4A: Learn about the forces that an object experiences on a ramp or inclined plane. Examples include inclines with and without friction. By Sal.

### Work and energy

4A: Learn about the concepts of work, mechanical advantage, and power. After understanding the principle of conservation of energy, you can apply it to different types of energy including kinetic energy, gravitational potential energy, and spring potential energy. Finally, learn about the conservative force as well as how to find mechanical advantage. By Sal and David SantoPietro.

### Fluids at rest

4B: Learn the physics behind fluids at rest. Some of the ideas explored are density, pressure, Pascal's principle, Archimedes' principle, buoyant forces, and specific gravity. By Sal.

### Gas phase

4B: Let's learn about gas phase chemistry! Discover the history and application of the ideal gas law. We'll walk through topics like temperature, STP, partial pressure, and the difference between real gases and their ideal counterparts. By Ryan Patton.

### Capacitors

4C: Learn how a capacitor works, and the mathematical formulas that explain their behavior. By David Santo Pietro.

### Stoichiometry

4E: Think about the concept of the "mole" and how we can use it to help us balance chemical reactions. By Sal.

### Redox reactions

4E: Discover how to assign oxidation states/numbers in redox reactions, then go on to balance redox reactions! By Jay.

### Periodic table

4E: Learn about how the periodic table is organized and then explore ionization energy and electron affinity. By Jay.