The discovery of atomic structure in the early 1900’s was discussed in chapter 2 of your textbook. one atomic model proposed during this period was the plum pudding model. which statement best describes this model?

(a) most of the atom is "empty space" with an electron moving in a region outside of the nucleus.
(b) all three of the other options are correct
(c) it included negatively charged particles.
(d) it relied on millikan's determination of the electron's charge.

The correct option is: (C) It included negatively charged particles.

Explanation:

Sir Joseph John Thomson proposed an atomic model, known as the plum pudding model in 1904.

In this model, he compared an atom to a plum pudding and suggested that the negatively charged electrons are the plums that are embedded in a uniform positively charged spherical pudding.

Therefore, according to the plum pudding model, an atom has no net electric charge and contains negatively charged electrons.

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