Question

#1: How many meters are in 0.05 kilometers?
A. 50

B. 500

C. 5,000

D. 50,000
**MY answer: A
is that right?? :)

Answer 1

#2: A container has the dimensions of 30 cm x 50 mm x 0.1 m. The density of its contents is 2.5 g/cm^3. What is the mass of the substance in kilograms? (D = m/V)

A. 3.8 kg

B. 38 kg

C. 380 kg

D. 3,800 kg
***Idk :( please explain? :) thanks :)

Answer 2

heyy!! :) so did i get #1 right?? is it A. 50??

Answer 3

hey ! yep # 1 is A

for #2 use the formula Density = mass/ Volume

Answer 4

1 cm^3 = 1 mL

Answer 5

do find the volume of the box.. length x width x height

Answer 6

wait what?? so i use mass/volume=d
so how do i find the mass??
and the density is 2.5 g/cm^3?
so i plug in and get this?
2.5 g/cm^3=m/??
idk how to find the volume :(
is this the lxwxh??
30 cm x 50 mm x 0.1 m.

Answer 7

haha yep, to get the volume of a rectangular box you multiply all 3 lengths in the 3 dimensions

Answer 8

but you have to convert all the units to the same unit

Answer 9

how do i do that?? I'm so bad at converting :(

Answer 10

1 m = 100 cm = 1000 mm

Answer 11

it's easy with the metric system, i hate inches and yards all that nonsense

Answer 12

so i get this?
30 cm x 50 mm x 0.1 m
=0.3m x 0.5m x 0.1 m
??

Answer 13

30 cm = 0.3 m
50 mm= 0.05 m remember just move the decimal point over 3 times when dividing by 1000

Answer 14

ohh so i multiply all that and get this?
0.0015 m
???

Answer 15

yep m^3 though remember your units

now notice that they give you density in units of g/cm^3 so you have to convert either one to match .. id suggest convert m^3 to cm^3 ..

Answer 16

wait so i get this?
V=30cm x 5cm x 10cm=1500 cm3

Answer 17

???

Answer 18

and then i get this?? d=m/V which is the same as m=dV so i get this???

m=2.5g/cm3 x 1500cm3 = 3750g = 3.75kg which is about 3.8.
So the answer is 3.8kg???
is answer A. 3.8 kg my answer??
@aaronq ?? :D

Answer 19

yep!

Answer 20

sorry my internet connection is garbage and i keep cutting off

Answer 21

but you are correct ma friend

Answer 22

oh it's okay!! YAYYYY :) woot woot!! Thanks :)

Answer 23

and yeah my internet is like sooo annoying sometimes :(

Answer 24

wooo (y) no problem, it was all you man!

Answer 25

yeah! any other site would load except this one, it's silly

Answer 26

haha thanks :) and yeah OS is supeeeerr slow sometimes, like it crashes a lot and lags too :(

Answer 27

haha thanks :) and yeah OS is supeeeerr slow sometimes, like it crashes a lot and lags too :(