A4m^3 container is being filled at a rate of 0.051m^3/s. what is the time required to completely fill this container?

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.