An antiaircraft shell is fired vertically upward with a muzzle velocity of 1000 m/s. Calculate: (a) The maximum height it can attain. (b) The time taken to reach this height. (c) The instantaneous velocities at the ends of 20 secs and 50 secs.​

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

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

Why does lightning travel from clouds to the ground?