200 Newton is suspended to the lower extremity a coppr wire of length one metre .calculate elongation of the wire if the radius of its cross-section is 1 mm and young models of its material is 1.1 x 10 to the power of 7 Newton per metre square.​

What is a subatomic particle with a negative charge and very little mass?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

If frequency goes up, what happens to wavelength? does it get shorter or longer?