Pluto was first observed in 1930, and its largest moon, charon, was discovered in 1978. a few years after charon’s discovery, astronomers were able to observe a series of eclipses as pluto and charon passed in front of one another. by studying how the brightness of pluto and charon changed as they eclipsed each other, astronomers were able to measure the masses and radii of both pluto and its moon. what did these measurements imply about the average densities of pluto and charon?

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.

wavelength divides in half and speed stays the same.

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