Does this model represent a compound? Explain your answer.

2 green spheres connected by 1 grey stick.

A model consisting of 2 green spheres connected by 1 grey stick cannot represents a compound.

This is based on the assumption that each of the green spheres in the model represents an atom of the same element while the grey stick represents a bond.

Two atoms of the same element cannot form a compound even if they have a bond between them. This is because a compound is a substance made of 2 or more atoms of different elements linked together by bonds.

More on compounds can be found here: link

The model does not represent a compound because it shows two atoms of the same element combined. To be a compound, the model would need to contain atoms of different elements, represented by different-colored balls.

Explanation:

It's the sample response. The answer above works perfectly as well tho.

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

it's all four options.