When an object is lifted 12 meters off the ground, it gains a certain amount of potential energy. if the same object is lifted 24 meters off the ground, its potential energy is which of the folowing? the same. b. three times as much. c. four times as much. d. twice as much.

D. twice as much.

Explanation:

The question varies the potential energy at two different heights.

The formular for potential energy is given as;

P.E = m × g × h

where;

m = mass

g = gravitational force

h = height

In both cases, m and g are both constants so we have;

First Case; P.E = mg * 12 (when h = 12)

Second Case; P.E =mg * 24 (when h = 24)

Comparing both cases, we can deduce that;

Second Case =  2 * First Case.

This means that the potential energy would be twice as much.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.