Back of the envelope in addition to solving the problems below, discuss the typical values and/or ranges for the parameters you will need? (a) how long does it take a thermal perturbation at the base of a craton to reach the sur face? consider what you will need to know to solve this problem (b) the retreat of glaciers at the end of the pleistocene (~10 ka) allowed warmer air tem- peratures to heat the ground. how deep a borehole would we need to observe temper atures undisturbed by warming? assume a diffusivity of 0.8x 10-6 m2 s-1.

that would be b i just took the test : )

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.