Hewitt-Drew-it! PHYSICS 99. Car Battery Power

A summary of current, voltage, resistance and power.

 

Hewitt-Drew-it! PHYSICS 98. Battery Demo

Circuit features featuring a car battery and bulbs.

 

How Modern Light Bulbs Work

Incadescent lamps, halogen lamps, fluorescent lamps, vapor lamps, LED.

Hewitt-Drew-it! PHYSICS 97. Circuit Resistances

Finding equivalent resistances for complex circuits.

 

How do figure skaters exploit Newtonian physics when they spin?

Legendary MIT physics professor Walter Lewin describes some of the science that was in action during the Winter Olympics in Sochi. He explains how ice-skaters use their arms to moderate their moment of inertia, which in turn affects the angular velocity of their spins. The biomechanics is fairly straightforward, but Walter Lewin always manages to make his lessons engaging thanks to his trademark charisma.

 

Hewitt-Drew-it! PHYSICS 96. Equivalent Resistance

Rules for equivalent resistance for series and parallel circuits explained.

 

Hewitt-Drew-it! PHYSICS 95. Electric Power

Battery and brightness of bulbs explained.

 

Hewitt-Drew-it! PHYSICS 94. Bulbs in Parallel

The rules of parallel circuits illustrated.

 

Hewitt-Drew-it! PHYSICS 93. Water and Electron Circuits

The similarities and differences between electric and hydraulic circuits.

 

Hewitt-Drew-it! PHYSICS 92. Voltage Drop

Why the sum of the voltages across bulbs in series adds to battery voltage.

 

Collin's Lab: Multimeters

Adafruit's new series of videos with Collin Cunningham is here! Collin's Lab: Multimeters! The multimeter is your greatest ally when working with electronics. Learn how to measure voltage, resistance, current, & continuity - as well as which meter works best for specific tasks.

 

Licking a 9 Volt Battery

SparkFun engineer Shawn breaks down the science behind the tingling sensation you get when licking a 9 volt battery.

 

Hewitt-Drew-it! PHYSICS 91. Ohm's Law

Battery and bulb to explain, with numerical examples.

 

Hewitt-Drew-it! PHYSICS 90. Electric Potential

Compared with electric potential energy, with novel situations.