Question

What happens when an object is dropped?

A.
force and mass increase every four seconds

B.
accelerates due to the force of gravity

C.
change in velocity depends on mass

D.
decelerates as it gets closer to the ground

Answer 1

@Destinymasha @myininaya @iambatman @chosenmatt @Joel_the_boss @CloverRacer

Answer 2

accelerates due to the force of gravity

Answer 3

How can two atoms of the same chemical element be different?

A.
They may be different allotropes of the element. Each allotrope of the same element has a different number of electrons.

B.
They may be different isotopes of the element. Each isotope of the same element has a different number of neutrons.

C.
They may be different isotopes of the element. Each isotope of the same element has a different number of electrons.

D.
They may be different allotropes of the element. Each allotrope of the same element has a different number of neutrons.

Answer 4

@aaronq

Answer 5

I can help you by telling you that atoms of the same element are different by being isotopes. It's up to you to look up the definition of an isotope.

Answer 6

i still don't understand @aaronq

Answer 7

it is not allotrope, those are different arrangements of the atoms. Like carbon is arranged in different structures to form, graphite, diamond, C60 fullerines...

For an atom to be different, it has to have a different number of protons, neutrons, or electrons.
Look up what isotope means.

Answer 8

The answer is in the very first sentence here...
http://en.wikipedia.org/wiki/Isotope

Answer 9

i still don't get it