If a pressure of 70.kpa on a volume of 80.cm cubed is reduced to 10.kpa, by what factor does the pressure change

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?

Acorporation gives out its profits as dividends paid to whom?