Question

explain using physics theory either one

Why should you not put foil in the microwave? or Why are skis so long?

Answer 1

Why Are Skis Long?

There Are Several Reasons Behind This But According To Physics Since Long Skis Have A Greater Surface Area Under Them they Exert Lesser Pressure Beneath The Ski To Helps To Avoid Sinking To Person Into Snow.

Also Since The Ski Is Long It Creates Just Enough Pressure To Melt Snow In Front Of Person Using The Ski So As By The Time He Reaches That Point The Snow Is Melted To Form A Thin Water Layer And Helps Him Glide Smoothly Over It.

Also They Help In Maintaining Balance By Distributing Weight Over Their Long Surface Area.

Why Should You Not Put Foil In Microwave ?

First of All According To Physics Microwaves Cannot Pass Through The Metals And Hence The Food Will Not Be Heated Instead The Heat Will Be Absorbed By The Foil And Will Start To Burn.

Also If The Foil Has Sharp Edges On It Due To Uneven Folding Then Through It Electric Current Will Run And Cause Sparks due To Accumulation Of Free Charges Of Metal Foil On That Edge.This Spark May Cause A Fire.