Maria examines a mixture that appears to be the same throughout. however, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid. which conclusion best fits her observations? the mixture is a solution because it has the same appearance throughout the sample. the mixture is a suspension because it is composed of two different-appearing substances. the mixture is a heterogeneous mixture because one liquid is dissolved in the other. the mixture is a colloid because two different substances can be seen in a small sample.

The correct statement is the last one.

Explanation:

A microscopically insoluble component, which is suspended all through the other substance is known as a colloid. As the existence of an emulsifying agent, that is, a mixture of water and oil becomes a colloidal dispersion.  

Colloidal dispersion is a system in which the droplets, discrete particles, or bubbles of a dispersed phase (oil) are distributed in the other, generally the continuous phase-dispersion medium (water) varying from the dispersed phase in the state of aggregation or composition.  

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