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agasfer [191]
3 years ago
13

What is a cool 1 week or less science fair project for grade 9?

Chemistry
2 answers:
Nina [5.8K]3 years ago
5 0
How different genres of music affect animals. If you have any hamsters, fish etc you can separate them and expose them to different types of music for long periods of time and observe their behavior. Make sure u have a control group which isn't listening to music.
Leno4ka [110]3 years ago
3 0
Make a fizzing volcano with facts and pictures of a volcano
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6. if a cross country runner travels at a speed of 10 mph and he runs for 2 hours, how many miles will he have run at the end of
storchak [24]

Explanation:

distance = speed x time

distance = 10 x 2

distance = 20miles

hope that helps :)

5 0
2 years ago
Please help meee 1st question​
spayn [35]
360 seconds?

i’m guessing that is the answer as the question is unreasonable
5 0
3 years ago
You are on an alien planet where the names for substances and the units of measures are very unfamiliar. Nonetheless, you obtain
Margarita [4]

Answer: 12


Explanation.


This problem was recently posted and deals with the conversion of units,so I give the same answer.


You need to convert the 9 quibs of skvarnick to sleps, to determine how many sleps you have.


The conversion of units is easily undertaken once you build your conversion factors.


Conversion factors are ratios (fractions) equivalent to one, which permits use the identity property of the multiplication to change one unit to a different equivalent one.


Remember that the identity property of multiplication states that any amount multiplied by 1 remains unchanged, i.e.

               a.1=a

Then, build your conversion factor from the definitions given:

  •    12 sleps is equal to 9 quibs.
  •    12 sleps = 9 quibs
  •    in virtue of the division property of equality, you can divide both sides by 12 sleps and get:

                                       1 = 12 sleps /  9 quibs ← conversion factor

Now you can multiply the amount 9 quibs by the conversion factor, which is equal to 1, to find the equivalent amount of sleps:


  •    identity property: 9 quibs = 9 quibs × 1
  •    substitution property: 9 quibs = 9 quibs ×  12 sleps/  9 quibs

You can see that the unit quibs appear in the numerator and the denominator so it cancels out, and the result will be in sleps.


So, all you have to do now is the operations with the numbers:

       9 quibs = (9 ×  12 / 9) sleps = 12 sleps ← answer

3 0
3 years ago
A natural sample of boron consists of two isotopes
amid [387]
Boron: isotope data. Both isotopes ofBoron, B-10 and B-11, are used extensively in the nuclear industry. B-10 is used in the form of boric acid as a chemical shim in pressurized water reactors while in the form of sodium pentaborate it is used for standby liquid control systems in boiling water reactors
7 0
3 years ago
Question 6 *
ycow [4]

Answer:

33 g

Explanation:

Given data:

Number of moles = 5 mol

Mass of compound = 165 g

Molar mass or gram formula mass = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Now we will put the values in formula.

5 mol = 165 g/ gram formula mass

Gram formula mass = 165 g / 5 mol

Gram formula mass = 33 g/mol

7 0
3 years ago
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