apricothare693

A rocket from house A is lunched to house B. The path of his rocket is given by R(t) = 0.1t^2 + 124t , where R(t) is the rocket’s height, in metres and t is the time, in seconds since it was launched. House B has a satellite capable of shooting down rockets. The path of House B's projectile is given by P(t) = −4t +80000, where P(t) is the height of the projectile, in metres. Determine the rocket’s height when it is shot down

(a) An electron has a kinetic energy of 6.00 eV. Find its wavelength.
 nm

(b) A photon has energy 6.00 eV. Find its wavelength.
 nm

In a photoelectric experiment, a metal is irradiated with light of energy 6.56 eV. If a stopping potential of 1.04 V is required, what is the work function of the metal?
 eV