What is an object that allows some electrons to go through it

Me finding out bananas are curved because they grow towards the sun what do you think about this?

When you traveling downhill on a roller coaster, you experience a light feeling in your stomach. why

What is the correct reference frame for a given situation?

What type of charge can move?

As the distance between two charged objects increases the strength of the electrical force between the objects

Two identical objects are moving directly toward one another at the same speed v. ~v - ~v m m What is the total kinetic energy of the system of the two objects?

Why would a long series of gradual ramps be better than one short, steep ramp for moving heavy blocks of stone?

Why are some liquids more viscous than others?

If a person weighs 125 lbs, 8oz., how many mg does s/he weigh

An iron rod is: A:a good conductor of heat and electricity, but not magnetic B: magnetic and a good conductor of heat, but is an insulator of electricity C: magnetic and a good conductor of heat and electricity D: not magnetic and an insulator of