Posts tagged Lesson

AC and DC power: Voltage Lesson 2 of 2


This video discusses the difference between AC and DC power supplies including batteries, wall outlets, and voltaic cells. This is the second video of a broader discussion about voltage. The video also makes use of computer simulations created by: PhET Interactive Simulations University of Colorado
Video Rating: 4 / 5

120%+ SUPER BATTERY LIFE! Buy Cheap Laptop Batteries at

ScienceMan Lesson – Unibody MacBook Pro Hard Drive / Battery Replacement

21 provides free digital lessons and technology integration help for teachers and students. In this digital lesson, a MacBook Pro 15″ hard drive is replaced, and problems with swollen batteries are discussed. ScienceMan™ and ScienceMan Digital Lessons are protected by copyright. All rights reserved.
Video Rating: 4 / 5

UNBEATABLE 66% OFF DISCOUNT! Buy Laptop Batteries on

Go to Top