INTRODUCTION - fill the blank for full creditbank: 0.1, 1000, Earth, 100, 0.01, 10, force, 0.001, 9.8
1 m = _____cm , 1kg = _______g, 1cm = ______mm, 1m = ________mm,
1cm = _____m , 1g = ________kg, 1mm = ______cm, 1mm = ________m
weight (N) = mass (kg) x _____ . N is for the unit newton. It is the unit for pull or push, that is the unit for ________.
The weight is the downward ________ exerted by ________ on objects.
PROCEDURE
Remember: Volume ( cm3) = V = L (cm) x W (cm) x H (cm) (for a cube or any box)
total surface area (cm2)= A = sum of the areas of the faces = L (cm) x W(cm) x 6 activity1:
work with the blocks. You need a spring scale and a ruler. Make sure you use the right unit. Fill the table.
| L = length in cm (ruler) | W= width in cm (ruler) | compute area in cm2 A = L x W |
| block1 | | | |
| block2 | | | |
| block3 | | | |
activity2: Work now with the 2 Physics book. You will need a plate scale and a ruler.
WEIGHT(N) = MASS (kg) x 9.8
mass in kg
use the plate scale in kg | mass in g
(convert)
| weight in Newton (N)
| L= length in cm (ruler) | W= width in cm (ruler) | h = height cm
(ruler) | V= volume in cm3
|
| _______ | _______ | _______ | _______ | _______ | _______ | _____ |
| _______ | _______ | _______ | _______ | _______ | _____ | _____ |
activity4: You need 1$ bill.
Find the width of a $ bill in centimeter W = ______cm = _____mm = ________m
Find the length of the $bill in centimeter L = ________cm = _____mm =_________m
Find the area in cm2 (follow steps:) A = W (cm) x L (cm) = ____cm x ______ cm = ________ cm2
Find the area in mm2 (follow steps:) A = W (mm) x L (mm) = _____mm x _____mm = _______mm2activity5: You need a cylinder (any thing with the shape od a cylinder)
Measure the diameter of the cylinder can D = ______ cm
Measure the radius of the cylinder R = D/2 = ______cm
Measure the area of the top of the cylinder A =п R2 = _______ cm2Measure the height of the cylinder H = _________cm
Find the Find the volume of the cylinder V = A x H = _______ cm3
activity 6: Using a meter stick:
Find the width of the Physics lab door in meters W = _____ m = ______ cm = _____________ mm
Find the length of the Physics lab door in meters L = ______m = ______cm = ______________mm
Find the area of the door Area A = L (m) x W (m) = _____ m x _____ m = ________ m2
Find the area in cm2 A(cm2) = L(cm) x W (cm) = _______ cm x _____ cm = ___________cm2
activity7: Use the bathroom scale to find your mass in kilograms.
m = ______ kg convert to grams m = _______ g .
Find your weight W in newtons W (N)= mass (kg ) x 9.8 = _____ N
Find your weight in pounds W = ___________ lbs hint: 1 N = 0.22 pounds
activity 8 : You need an apple and a plate scale (in grams)
Find the mass of an apple in grams m = ______g.
convert to kg m = _____kg.
Find the weight W = _____N hint: weight (N) = mass (kg) x by 9.8 (m/s/s)
activity 9: You need a ream of paper. A ruler.
Take a guess ? what is the the volume of on single sheet of paper ? 1cm3 ? 5cm3 ? 10cm3 ? (about).
You are going to check your guess.
Find the length L of the ream = ______ cm. Find the width W = _______cm.
We need to find now the height of a single sheet. TO do so, lets measure the height of 500 papers:
H = _______ cm. So the height of a single paper = H/500 = _______cm
Volume of a sheet = W(cm) x L (cm) x h (cm) = ________cm3. where you right ?
activity10: you need pennies. A ruler.
Let's find the volume of a single penny. Take a guess: V = _______ cm3Volume penny = volume of a cylinder =п R2 x h in cm3. R is the radius of the penny (half of the diameter D).
h is the height (cm). First find D the diameter using a ruler D = ____cm. So R = D/2 = _____cm
Let's find the height of 10 pennies in cm: H = ____ cm. So the height of one penny = H/10 = _____cm
So volume = пR2 h = п x _____cm2 x _______cm = _______ cm3where you right ?
GOING FURTHER: geometry (try without hint)1) One of the largest pizzas made (in Glens FAlls, NY) had a R= 40 ft radius. WHat is the area of this crater (in ft)?
(hint: area = pi R
2) .
2) Summer storm is circular in shape with a 50 mile long diameter. WHat area does this storm cover ? (in mi
2)
(hint: first find R the radius = D/2)3)
One of the largest omelets made was cooked at Conestoga College, in
Ontario, Canada. It measured 30ft by 10ft. WHat was the area of this
rectangular omelet?
(hint: area = width x length)4) THe volume of a rectangular prism (a box) is computed by multiplying width x length x height
If an average rectangular block of limestone used to to build the great pyramid of Khufu at Giza is approximately
2.5
feet by 3 feet by 4 feet land limestone weights approximately 170
pounds per cubic foot, what is the weight of the nearly 2,300,000
limestone blocks used to build the pyramid ?
hint: follow the steps:
A) Find the volume V of one block in ft3
B) Find the weight of 1 block (multiply V by 170)
C) Find the weight for 2,300,000 blocks (multiply)
5)
Although the Exxon Valdez oil spill (11 million gallons of oil) is one
of the most notorious oil spills, it was small compared to the 250
million gallons of crude oil that were spilled during the 1991 Persian
Gulf War. A gallon occupies 0.13368 cubic foot. How many
rectangular pools, each 20 feet by 30 feet by 5 feet, could be filled
with 250 millions gallons of crude oil ?
hint: follow the steps:
A) Find the volume V occupied by the 250 millions gallons. (multiply by 0.13368)
B) Find the volume v of a pool (in ft3)
C) find out many v can fit into V (divide V by v)