Select the correct description of atomic structure. * A. Protons and electrons are located in the nucleus.
B. Protons and neutrons are located in the nucleus and electrons circle.
C. Atoms are in the nucleus and electrons circle.
D. Electrons and neutrons are located in the nucleus and protons circle.

you either don't have the answers wrote out correctly or none are correct but b looks like closest answer

Explanation:

protons are positive and rest in the center with neutrons electrons (like the name suggests) go in the electron cloud (or circle)

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