A stone is thrown horizontally from the top of a building. It has an initial speed of 5m/s2. Use g= 10m/s2. The height of the building is 50m. The ground is at the base of the building. a) Define your initial conditions at t=0 in the following:
xi= yi= (Vx)i= (Vy)i=

b) Find the time the stone stays in the air

c) find the range (Xf-Xi) of the stone:

d) find the speed of the stone at the landing

Will you chech and finish these for me, because i am stumped with them.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot