The delocalized π system in benzene is formed by a cyclic overlap of 6 orbitals.

unhybridized pi oribtals

Explanation:

The pi bond is always formed by the sideways overlap of unhybridized p-orbitals that include Py and Pz orbitals.

The 2Py and 2Pz orbiatls in each carbon atom forming the benzene ring, are unhybridized that are responsible for pi bond formation between the carbon atoms that form a benzene ring.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j