If the theoretical tensile strength of flawless Borosilicate Glass is 5.6 GPa, what is the maximum allowable length of an internal elliptical flaw, whose radius of curvature at the flaw tip is 5 micrometers, if the part must withstand a tensile stress of 250 MPa

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it