The flash of a camera uses a 3,0 volt battery to charge its capacitor. The capacitor is charged slowly, but the charge (and the energy) is released in a time of 10 µs when the button is pressed. (a) If the flash operates at a power of 10 W, how large capacitance should the capacitor have in order to make the flash function?
(b) In which ways could you improve the capacitance of the capacitor?
(c) Describe what happens in a capacitor if more charges are added to the capacitor plates than the dielectric medium allows (you might need to look this up from the internet).

I'm trying to figure this out, I'm just really confused where 10W or 10µs comes in :( Any help is so greatly appreciated!

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c