Which is an unnecessary rule for writing chemical formulas? 1. identify the positive ion and charge
2. balance the charges
3. write the negative ion first
4. identify the negative ion and charge

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?