Water exists in all three phases (solid, liquid, and vapor) on Earth's surface because of the presence of bonds.

Hydrogen bond

Explanation:

Hydrogen bonds are usually referred to those bond that commonly occurs when a highly electronegative atom like fluorine, nitrogen or oxygen atom is attached to the hydrogen atom. For example, in water, the oxygen atom is attached with two hydrogen atoms and due to the difference in their electronegativity, there is a partial positive charge on hydrogen atom and a partial negative charge on the oxygen atom.

Hydrogen bonds are not actually considered to be true bonds like other bonds. They are comparatively much weaker bonds. This bond is responsible for the increasing cohesiveness between the water molecules, that enables them to cling to one another.

Due to the presence of this bond, water can exist in all three phases on the surface of the earth.

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

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.