Physics and Chemistry have been very useful in Construction!

And Mathematics as well as this is underpins all the Sciences!

Some direct & interesting examples I have come across:

• Torque formula in using a larger knife to cut
• Chemistry of soap in making sure you have all 3 present (not 2 or 1) - water, soap and agitation when you are cleaning! 
• The Statics of leaning a pole or beam against an object such that it is stationary e.g. wet mop
• ...

The Scientific Method is great as well - your customers, partners and investors can't argue with that!

Decisions in Business (particularly Trades) are made based on Legal Reasoning but Scientific Reasoning and a well presented case will always resolve arguments!