When 7.9×1014 hz light shines on a plate of unknown material, it is determined that the stopping potential is 1.1 v. determine the work function (in ev) & the cutoff frequency. wo = ev fo =

Which two particles are found in the center of an atom

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Ascientific blank must be testable and capable of being proven false?