I MULTIPLE CHOICE QUESTION
In the "sea of electrons" model of metallic bonding
A .the nuclei are the negatively charged boats floating in a positively charged sea of electrons
B. the nuclei are the positively charged boats floating in a positively charged sea of electrons
. C. the nuclei are the negatively charged boats floating in a negatively charged sea of electrons
D. the nuclei are the positively charged boats floating in a negatively charged sea of electrons

An ionic compound can conduct electricity when a it is dissolved in water b its crystals are ground into powder c it is in solid form d it is heated to just below its melting point

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc