Question

The table below compares the radioactive decay rates of two materials.

Material Original mass of material (in grams) Mass of material after 60 hours (in grams)
1 208 13
2 200 50

Based on the table, which of these conclusions is most likely correct?

The half-life of Material 1 and Material 2 are equal.

The half-life of Material 2 is double the half-life of Material 1.

The half-life of Material 2 is 30 hours more than the half-life of Material 1.

The half-life of Material 1 is 30 hours more than the half-life of Material 2.

Answer 1

@Lunarwolf58

Answer 2

OK. So far i've got that the Half life of Mat. 1 Decays every 15 hours Because it decayed Four times. Mat. 2 decays every 30 Since it decayed twice...

Answer 3

So it'd be from what im guessing B: Mat. 2's Half Life is Double Mat. 1s

Answer 4

Australia is in the Southern hemisphere. Which of these statements is correct about Australia?

It experiences the first day of summer at Position 3 and first day of winter at Position 1.

It experiences the first day of summer at Position 1 and first day of winter at Position 3.

It experiences the first day of autumn at Position 3 and first day of spring at Position 1.

It experiences the first day of autumn at Position 1 and first day of spring at Position 3.

Answer 5

@Lunarwolf58

Answer 6

I THINK its B i can be wrong :/ Sorry dude But From the positioning and light thats what i seems to be

Answer 7

thanks though :p

Answer 8

Which of these provided the first evidence of life on Earth?

ancient virus

ancient bacteria

non-living molecules

reproducing molecules

Answer 9

@Lunarwolf58

Answer 10

answer^?