In 1869, dmitri mendeleev was trying to arrange the 65 known elements in a logical way. he arrived at the solution when he saw the elements arranged by atomic weight in a dream. he tried this arrangement and it worked! what is this an example of?

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!

there are no components of a physical goal mentioned on the list of choices that you've provided.

conservation of mass

mass before something happens = mass afterwards