The percent yield can never be greater than 100%. (t/f)

True

Explanation:

The percentage yield of a reaction , is given by the formula -

Percentage yield = (actual yield)/(theoretical yield)  * 100

Actual yield = the exact amount of yield obtained from an experiment

Theoretical yield = the calculated yield of the experiment.

The denominator value i.e. theoretical yield can never exceed the numerator value , i.e. the actual yield ,

Hence,

percentage yield can never be more than 100% .

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