Question

http://prntscr.com/kck19b

Answer 1

@Vocaloid @nuts @Ultrilliam

Answer 2

basically so there's a consensus about which units to use and reduce the need to convert between units. as a real life example, because of confusion between imperial and metric, NASA ended up losing a spacecraft (the mars climate orbiter) because of a lack of consistency in their units

Answer 3

Soooo thats the response ?

Answer 4

I mean, you can't copy-paste it, but it should give you a general idea of what to write

Answer 5

ohh ok

Answer 6

http://prntscr.com/kck2qn

Answer 7

100 cm = 1 m
10 dm = 1 m

so to convert from cm to m, divide by 100; to convert from dm to m, divide by 10

see which one is longer

Answer 8

so do that for 2,500 and 25

Answer 9

yes

Answer 10

http://prntscr.com/kck454

Answer 11

most solids decrease in volume at low temperatures - assuming mass is constant does the density increase or decrease?

Answer 12

increase

Answer 13

good so your answer should include something like

> the volume decreases
> density = mass/volume
> so density increases if mass is constant

Answer 14

http://prntscr.com/kck51y

Answer 15

a couple of problems I see

> it's not specific (how much chocolate?)
> it's not measurable (how are we going to measure how much their happiness changes?)

Answer 16

http://prntscr.com/kck5gz

Answer 17

"qualitative" so see which parts of the data are descriptions rather than numbers

Answer 18

http://prntscr.com/kck61r

Answer 19

hm that's the same question again

Answer 20

http://prntscr.com/kck6jp

Answer 21

"she thinks they are cleaner" but she needs to compare the cleanliness level of the old detergent vs new detergent in a controlled experiment, where the only variable changed is the detergent type, and she must determine some quantitative way to compare the cleanliness level, like seeing what percentage of the clothing is dirty or something like that

Answer 22

http://prntscr.com/kck7gb

Answer 23

any ideas? which variable (the type of cleaner, or the amt. of soap scum removed) is being changed by the experimenter?

Answer 24

The cleaner?

Answer 25

good so the type of cleaner (new vs old) is the independent and the amount of soap scum removed is the dependent

Answer 26

Okay thanks voca