Because an accelerometer senses motion and gravity, it may sense the angle at which it is being held. This is what makes the Wii work: Instead of a joystick, the user or player manipulates a controller (fairly like a distant…

On the opposite end of the spectrum, two-cycle gasoline lawn mowers are inefficient and release 25-30 % of their mixture of oil and fuel unburned into the air [supply: Folks Powered Machines]. A four-cycle lawn mower engine burns its fuel…

­Workout guru Richard Simmons was a formerly overweight child who lost greater than a hundred pounds (forty five kilograms) and determined to make use of his success to cheerlead the rest of the nation into its skinny jeans. In the…