Redirected from 728 BC
Decades: 770s BC 760s BC 750s BC 740s BC 730s BC - 720s BC - 710s BC 700s BC 690s BC 680s BC 670s BC
Significant People
... axis is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brake the spinning gyroscope, with a maximum effect when ...