A hollow, conducting, discharge sphere of mass floats in a dielectric liquid of constant K, keeping 3/4 of its volume out of the liquid. At what potential must the sphere be charged to float half its volume

How many molecules are present in 3 mols of silicon dioxide (sio2)?

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.