The radius of a typical human eardrum is about 4.15 mm. calculate the energy per second received by an eardrum when it listens to sound that is at the threshold of hearing, assumed to be 1.20e-12 w/m2

Power energy per second will be equal to

Explanation:

We have given radius of human eardrum r = 4.15 mm = 0.00415 m

Intensity at threshold of hearing

Area is given by

We know that power is given by

So power energy per second will be equal to

whichever one it is, it's definitely not one that you included on the list you provided.

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.