MATH - Convert & Density
Convert
150 cg = _____?______ g
1.5 g
If a box is pushed with 75N of force to the left and 70N to the right, what is the net force?
Net = 5N to the left
How fast does a bowling ball roll down the lane if it can go 10 meters in 5 seconds?
S = d/t
= 10m/5s = 2m/s
Two nonmetals share electrons in a _____ bond
covalent
What is a claim?
An unsupported statement, like a hypothesis or prediction
Convert
47.9 km = _____?______ cm
4790000. cm
How much force is applied if a 5 kg mass accelerates at 3 m/s2?
F = ma
F = ma
= 5 x 3 = 15 N of force
A 200 kg bear runs toward you at 11 m/s.
What is the bear’s velocity?
11 m/s toward you
positively. they lost electrons, making them more positive.
"the leaf is green"
Is this claim, evidence, or reasoning?
Evidence. It is an observation.
Convert
98 mL = _____?______ L
0.098 L
How fast does a ball accelerate if it has 12 kg of mass and is thrown with 24N of force?
F = ma
F = ma so a = F/m
= 24/12 = 2m/s2
How fast is a wave that is 0.5 m long and has a frequency of 40 hZ?
Speed = freq x wavelength
S = f x w
= 40 x 0.5 = 20 m/s
How many Carbon atoms are there in 2H2CO2
2. The coefficient 2 multiplies everything in the compound.
"I ski faster than you do."
Is this claim, evidence, or reasoning?
Claim - there is no evidence to support it (yet).
How dense is a rock if it has 30kg of mass and takes up 2mL of space?
D = m/v = 30/2 = 15 g/mL
Moon’s gravitational acceleration is only 1.6 m/s2.
If a 6 kg puppy is sent to the moon, how much mass does the puppy have on the moon?
6 kg
A ball with accelerates down a hill, going from 10 m/s to 20 m/s in 5 seconds time.
How fast does is accelerate?
(20-10) / 5 = 10/5 = 2m/s2
How many Oxygen atoms are there in 2H2CO2
4.
The 2 coefficient multiplies by the O2 and 2 x 2 = 4
In a CERUN conclusion, what is the "U"?
Describing uncertainties, or errors/flaws, in the lab.
How massive is a sample of gold that has 200cm3 of space and a known density of 19.3 g/cm3?
D = m/v
m = DV
= 19.3 x 200 = 3860 g
Moon’s gravitational acceleration is only 1.6 m/s2.
If a 6 kg puppy is sent to the moon, how much does the puppy weigh on the moon?
F = ma = 6 x 1.6 = 9.6 Newtons
What is the energy of a 15 kg bowling ball moving at a velocity of 20 m/s?
* Potential E = m⋅g⋅h Kinetic E = ½ m⋅v2 Earth’s gravity (g) = 9.8m/s2
KE formula:
KE = 0.5 x 15 x 202
= 7.5 x 400 = 3000 Joules
Balance this equation by indicating how many H2O molecules there must be in the product.
4H + 2O --> ___ H2O
2.
"2" coefficient (2H2O = 4H and 2O) multiples everything in the compound.
Write a proper hypothesis for this question:
How long will it take you to walk to the main office from this classroom?
If _____ then_____ because_____...