An uncharged capacitor is connected to a 21-V battery until it is fully charged, after which it is disconnected from the battery. A slab of paraffin (K= 2.2) is then inserted between the plates. Required:
What will now be the voltage between the plates?

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?