How would you balance this equation?
Ca + O2 = CaO

2Ca+2O2->2CaO

Explanation:

You have 2 O’s on the left side so you multiply the right side by 2.

Ca + O2 -> 2CaO

Now that you have 2 Ca on the right side and only 1 on the left, you multiply the Ca on the right by 2.

2 Ca + O2 -> 2 CaO

more info ? ? i don't understand what the question is

explanation:

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