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?

a. pluto and charon have average densities that are expected for objects made mostly of water ice.
b. pluto and charon have average densities that are expected for objects made of rock.
c. pluto and charon have average densities that are expected for objects made mostly of gas.
d. pluto and charon have average densities that are expected for objects made mostly of liquid.

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth's center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance