Question

A man decides to build a boat. In order to make it durable, he decides to use solid steel. When he brings his boat to the lake, it sinks straight to the bottom. What could the man do to help make a boat that floats?
A)
He will never be able to use steel to make his boat.
B)
Add more steel to the sides of the boat to help it balance.
C)
Make the boat smaller, but continue to use the solid steel.
D)
Create a hollow area inside the steel to help lower the boats density.
@maddy1251

Answer 1

Well, adding more steel to the sides really isn't going to help it float. Me thinks it will make it heavier, thus causing it to possibly sink - again. (sigh) we don't want that. Making an object smaller with the same solid steel will not help.. It will still sink, it's made of the same matter (think like big rock sinks just like little rock sinks) And it is false that he will never be able to use steel to make his boat.. They use steel now in boats (I think, I am no mechanic)
However, lowering the boats density will in fact help it stay afloat, because the mass isn't as high. There won't be such a concentration to the boat, making it more "airy". May not be a professor explanation, but that gives you reasons for each answer.

Answer 2

0.0 huge paragraph....

Answer 3

sorry my brain doesn't cope with huge paragraphs

Answer 4

Haha that's okay, its been a Monday (but it's Tuesday) I am simply stating D as your answer.

Answer 5

The system of equations is inconsistent.

What are the missing values?


y= 2/3x+3
y= _/_x + 5

Answer 6

@maddy1251

Answer 7

I think it's 2/3.

Answer 8

If parallel.

Answer 9

Is
4x+y = 8
x+ 3y = 8

A. consistent independent
B. Coincident
C. inconsistent

Answer 10

@Maddy1251

Answer 11

@RainbowBrony555

Answer 12

What do you think is the answer for that one? ^

Answer 13

C?

Answer 14

@RainbowBrony555

Answer 15

@Zela101

Answer 16

Ya

Answer 17

-4x+6y = -2
2x-3y = 1

what about these?

Answer 18

@RainbowBrony555

Answer 19

@hannah130

Answer 20

@poopsiedoodle

Answer 21

@Squirrels

Answer 22

All the boat has to do is have a lower density than the water and not freakin' tip over.

Answer 23

D

Answer 24

Common sense.

Answer 25

dude. it is 11:22 at night. I

Answer 26

really am not in the mood for your games

Answer 27

I have no life.

Answer 28

I gave you the answer.

Answer 29

me neither. why do you think i'm doing school work at 11 at night

Answer 30

that. is not an answer

Answer 31

What do you mean?

Answer 32

what you're saying. Does that mean inconsistent

Answer 33

Is this a math question or science? I see no equations.

Answer 34

@UnbelievableDreams

Answer 35

let me run you through this.

A)
He will never be able to use steel to make his boat.
B)
Add more steel to the sides of the boat to help it balance.
C)
Make the boat smaller, but continue to use the solid steel.
D)
Create a hollow area inside the steel to help lower the boats density.

A is wrong because steel boats exist.

B is wrong because it's not tipping over that made it sink. C could be right but I don;t think so because some cruise ships are made of steel and D is probably right because right now the boat has a higher density than the density of water which is 0.9982.

Answer 36

so by lowering the density of the boat to 0.9881the boat would???

Answer 37

That's right. It would float.

Answer 38

wrong question bud

Answer 39

WOW you should have told me this.

Answer 40

You know.

Answer 41

I have no idea.

Answer 42

whale then

Answer 43

During science lab, some students added small pieces of magnesium ribbon to 10 mL of hydrochloric acid. They noticed that bubbles formed, the test tube got hot, and the magnesium disappeared.
Which is a sign that a chemical reaction has taken place in this experiment?
A)
change in odor
B)
change in color
C)
release of heat energy
D)
disappearance of magnesium

Answer 44

@FLVSKidd

Answer 45

@JasperRayWolf88

Answer 46

@Bixslo

Answer 47

@hyperlunatic

Answer 48

@YoungStudier

Answer 49

@jesus

Answer 50

@RCCB

Answer 51

@celinegirl

Answer 52

/@escamer

Answer 53

It would be C in this case

Answer 54

both A and B could be correct, but in the explanation, it says that heat was produced. Thus, that's your answer

Answer 55

1. Change of color

2. Formation of gas

3. Formation of precipitate

4. Change of temperature

5. Energy produced

Answer 56

Which of these is caused by a chemical change?
A)
The honey in a jar crystallizes and will no longer pour.
B)
The skin of a banana turns from green to yellow as it ripens.
C)
A box of powdered brown sugar turns into a solid brick over time.
D)
The salt crystals in a shaker cake and will no longer pour easily.

Answer 57

btw i was just making sure

Answer 58

That would have to be B, as the banana experiences a chemical change in order to change color.

Answer 59

The other choices mainly concern the change of states so they don't count as chemical, but only physical

Answer 60

In Antoine Lavoisier’s classic experiment, mercuric oxide is heated in a sealed container. The solid red powder is changed into two products: silver liquid mercury and oxygen gas.
If Lavoisier heated 100 grams of powdered mercuric oxide to produce 93 grams of liquid mercury, how much oxygen would be released?
A)
7 grams
B)
16 grams
C)
32 grams
D)
93 grams

Answer 61

@BarfBag

Answer 62

The total mass of both is 100 grams, if 93 grams of liquid mercury is produced, how much oxygen is produced?

Answer 63

Its just a matter of subtraction

Answer 64

100 - 93 = 7 g of Oxygen

Answer 65

Known Melting Points

Substance Melting Point (oC)
Lead 328
Aluminum 660
Iron 1538
Water 0
Table salt 801
Table sugar 185

The task in science lab: discover which solid substance, without tasting, is sugar. Donna and Dave have five substances to test, and unfortunately, two are white! "Let's heat them!" suggested Donna.

Did Donna have a reasonable solution to their problem?
A)
Yes, it would help narrow the search to salt or sugar.
B)
No, all four substances have pretty low melting points.
C)
No, it's impossible to reach these temperatures in a student lab.
D)
Yes, sugar's melting point is much lower than the other four solids.

Answer 66

@jas

Answer 67

@JasperRayWolf88

Answer 68

@EmoMuch?Yes.

Answer 69

@DavidUsa

Answer 70

@Owlcoffee

Answer 71

Well, to make it easy for you, the melting point for sugar is about 186ºC while th melting point for salt (supposing it's NaCl) is about 801ºC.
Now, those are the solids that look more like eachother, since they are cristaline solids, this becomes more tacit indeed.
So, if we were to heat both up, we will notice that one will reach it's melting point quicker than the other, thereby, the quickest one is sugar while the other one is salt.

Answer 72

0.0....paragraph...

Answer 73

.......yeaaaahhhhhh my brain doesn't cope with paragraphs

Answer 74

i literally can'tread that

Answer 75

@BRONCOBURDEN17

Answer 76

hey

Answer 77

ummmmm hold on

Answer 78

he melting point for sugar is about 186ºC while th melting point for salt (supposing it's NaCl) is about 801ºC.
Now, those are the solids that look more like eachother, since they are cristaline solids, this becomes more tacit indeed.

Answer 79

heat both up, we will notice that one will reach it's melting point quicker than the other, thereby, the quickest one is sugar while the other one is salt.

Answer 80

there i found ur answer on google

Answer 81

xD whale

Answer 82

lol XD

Answer 83

hello u thr

Answer 84

XDD WTF

Answer 85

lol

Answer 86

Looking at the picture above, which image(s) would be best classified as molecules?
A)
A and B
B)
A and C
C)
B and C
Eliminate
D)
A, B, and C

Answer 87

http://www.usatestprep.com/modules/gallery/files/125/12549/12549.jpg

Answer 88

@BRONCOBURDEN17

Answer 89

srry idk srry

Answer 90

Pure Aluminum foil
distilled water
NaCl (table salt)
Gold Bar (pure Au)
All of these may be classified as
A)
elements.
B)
compounds.
C)
pure substances.
D)
organic compound.

Answer 91

@BRONCOBURDEN17