What happens if sodium sulfide is added to iron(II) sulfide? [Fe^2+] increases and [S^2] decreases because sulfide is a common ion.

[Fe^2+] decreases and [S^2] increases because sodium is a common ion.

[Fe^2+] and [S^2] remain the same because sodium is not a common ion.

[Fe^2+] decreases and [S^2] increases because sulfide is a common ion.

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

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

the answer is   c.) 1575 j.

explanation:

am i too late?

explanation: