Igot a few questions 1.are we alone in the universe? 2.what makes us human 3.what is consciousness? 4. why do we dream? 5.how do we get more energy from the sun? need asap

1. We don't know yet, but personally I think there are "aliens" in the universe

2. Humans communicate with a very complex language plus we're not crazy like animals

3. the state of being aware

4. I think we dream so the brain can sort out all of our memories throughout the day.

5. The sun gives us many different types of vitamins through our skin.

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

the answer would be c