Mr.P introduces power which equals work divided by change in time and it also equals force times velocity times cosine theta.

It explains the state of the system by state functions or state variables and describes internal energy as a state function.

Mechanical Cooling Towers can be identified by the use of fans to create airflow. An induced draft tower will have fans at the top, which pulls air through. A forced draft tower will have fans at the bottom used to force air into the...

Physical Science for Kids is the fun way to learn important facts about physical science and get ready for tests. Take a fascinating journey to the Super Science Station to learn about light and energy.

You sent us your nano questions, and we answered! In this Ask a Scientist – Nano Edition, we join nano expert Saniya LeBlanc, from George Washington University.



See more nano videos and check out our Generation Nano: Small...

The stomach is an amazing organ. It varies in size from person to person but can contain up to 2 litres of food and liquid. The stomach is one of the organs in the digestive system. It is essentially a bag of muscle where food is kept...

Upon viewing the Exploring Energy video series, students will be able to do the following: Define energy as the ability to do work. Cite everyday examples of how energy is used to do work. Understand that kinetic energy is sometimes...

This live-action video program is about erosion. The program is designed to reinforce and support a student's comprehension and retention of the term through use of video footage, photographs, diagrams and colorful, animated graphics and...

Sing and learn about Work and Mechanical Energy with Bo!