Example 1 How much of an 8-gram sample potassium-40 remains after 3 half-lives have passed? Complete the table below to 'show your work'. Enter
your answers as whole numbers

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

answer(20) psi;

the ima (higher than 1m) will be greater than the ima with the height of 1m.