Question

Help me here and you'll get medal

Answer 1

@Hero

Answer 2

@DarkBlueChocobo

Answer 3

@amistre64

Answer 4

2. inspector Lestrade has sent a small piece of very reactive metal to the crime lab. Lab technician Earl LaMayer weighs the soft metal and finds that it weighs 54.3g. It appears to be either lithium,sodium,or potassium, all highly reactive with water. Therefore LaMayer places the metal into a glass graduated cylinder of radius 4 cm that contains a nonreactive liquid. The meatal causes the liquid level to rise 2.0 cm. Which metal is it?

Answer 5

http://www.docstoc.com/docs/80649033/Volume-Problem-Set
number 5 and 7 only :D

Answer 6

the soft metal weighs 54.3g.

It appears to be either lithium,sodium,or potassium, all highly reactive with water.

Therefore LaMayer places the metal into a glass graduated cylinder of radius 4 cm that contains a nonreactive liquid.

The meatal causes the liquid level to rise 2.0 cm. Which metal is it?

what is the volume of the shape?

Answer 7

i dont see this problem in your link ..

Answer 8

does the metal sink or float?

Answer 9

yup, its separated. so the volume of cylinder V=pi r^2 h

Answer 10

so the radius is 4 and high is 2?

Answer 11

yep

Answer 12

i got the answer of 0.54

Answer 13

D=m/V

Answer 14

how? either you havent given the full problem, or im missing something

Answer 15

D= 54.3g/100.53 cm^3

Answer 16

D= 0.54 g/cm^3

Answer 17

100.53 i get :)

Answer 18

was the metal fully submerged tho? the volume of the piece is only equal to the volume displaced IF the shape is fully submerged

Answer 19

if a cube is floating half way out of the water, the volume of the water displaced is not equal to the volume of the cube, right?

Answer 20

what number are you talking about?

Answer 21

what is the original question? i dont see it asking for anything ... what am i missing?

Answer 22

ok, lets do number 5 lol

Answer 23

gut a large cylindr with a small cylindar

Answer 24

pi R^2 h - pi r^2 h = pi h (R^2-r^2)

Answer 25

can you substitute the given, im dizzy in this problem lol

Answer 26

what our lengths?

Answer 27

200

Answer 28

no, thats the number of pipes

Answer 29

160

Answer 30

number of pipes?

length of each pipe?

outer radius?

inner radius?

pi?

Answer 31

200
160
6
5
3.14

Answer 32

radiuses, they arent 6 and 5

Answer 33

3, 2.5

Answer 34

6/2 and 5/2 are fine for me

so

160 pi (6^2-5^2)/2^2 is the volume of material for each pipe

Answer 35

the high is 160?

Answer 36

well yeah, stand the pipes on end ....

Answer 37

i got 440pi

Answer 38

so that is the total volume

Answer 39

440pi cm^3

and it weighs 7.7 grams per cm^3 giving us?

Answer 40

D=m/V
7.7 = m/440pi
m=3388pi

Answer 41

thats the wieght of each pipe in grams .. and we have 200 of them ... so total weight is?

Answer 42

3388pix200?

Answer 43

yeah, unless you want to add it all up instead

Answer 44

2128743.182

Answer 45

might be a little catch here, the pipes are discrete, so we cant haul more than so many at a time ...

what is a 1/4 tonne ?

Answer 46

250kg

Answer 47

3388pi * n <= 1/4 tonne is how many she can fit on one load

Answer 48

3.388pi kg is a fair conversion?

Answer 49

n <= 250/(3.388pi)

Answer 50

10.64 kg

Answer 51

23.5

Answer 52

and i assume we aint cutting them in half, so 23 full pipes per load

Answer 53

this is a little aside, it may be that they didnt think of it .... its just precautionry is all

Answer 54

23 divides 200 into how many loads?

Answer 55

8.7

Answer 56

so 8 + 1more trip

Answer 57

9

Answer 58

now assuming this is just over thinking

2128743.182 grams

2128.743182 kg in total, divided by 250 kg per load

Answer 59

still gets us 8.5 loads ... so it was negligble

Answer 60

8.5 loads will transport to deliver the 200length of steel pipe?

Answer 61

no driver makes half a run ... the .5 means that we make 1 last run after 8 are finished.

Answer 62

at least thats my take on it, i dunno whos grading it tho

Answer 63

well, lets move in number 7

Answer 64

im moving elsewhere ...

Answer 65

long posts lag my system