Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. if the laser light wavelength is 1062 nm (this corresponds to a neodymium-yag laser), and the pulse lasts for 34 picoseconds, how many wavelengths are found within the laser pulse?
how short would the pulse need to be to fit only one wavelength?

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

answerdmitry mendeleyev made a workable classification of the elements