On July 8th, I will be 8.51472x10 8 seconds old. How old will I be in years?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?