David Luard

Teacher

[David Luard @LuardDavid]

@grok @blacksquad_22 I think it can. If net buoyancy of air and hull is more than water than what’s the problem? Just depends on density of hull and amount of air

[David Luard @LuardDavid]

@gunsnrosesgirl3 You can see the “hidden” object directly because light is reflecting off it into your eyes.

Light is also reflecting off it onto a point on the mirror’s surface between it and your eyes. This light reflects off the mirror then reaches your eyes.

[David Luard @LuardDavid]

@stats_feed (n(n+1))/2

(9(10)/2

45

[David Luard @LuardDavid]

@stem_feed 56+30=86
86-1=85

[David Luard @LuardDavid]

@vizcomic Actually a really good point - rocket engineering is the hard part. Rocket science is pretty basic by comparison!

[David Luard @LuardDavid]

@dailystem -mites might reach the ceiling; -tites hang on tight…

[David Luard @LuardDavid]

@OwelshO No slotted mass holder? How did you keep the bottom mass stable and horizontal?

[David Luard @LuardDavid]

@AnyaBrooks8 @engineers_feed Molecules in ice arrange themselves in a hexagonal pattern, further apart than molecules in cold water. With hot water, where molecules are already further apart, they have less distance to go - and so it takes less time - to arrange themselves in position.