daily quiz:
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Daily Quiz:
Daily Quiz:
1. Which of the following is a base unit?
A. volume
B. length
C. density
D. velocity
Daily Quiz:
2. If there were such a thing as a megadollar, it would be worth
A. $1,000
B. $100,000
C. $1,000,000
D. $100,000,000
Daily Quiz:
3. Density is equal to
A. mass x volume
B. mass ÷ volume
C. volume ÷ mass
D. length x width x height
Daily Quiz:
4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?
A. mass = 36 g, vol = 12 cm3
B. mass = 9 g, vol = 1.5cm3
C. mass = 3 g, vol = 2 cm3
Daily Quiz:
1. Which of the following is a base unit?
A. volume
B. length
C. density
D. velocity
Daily Quiz:
1. Which of the following is a base unit?
A. volume
B. length
C. density
D. velocity
Daily Quiz:
2. If there were such a thing as a megadollar, it would be worth
A. $1,000
B. $100,000
C. $1,000,000
D. $100,000,000
Daily Quiz:
2. If there were such a thing as a megadollar, it would be worth
A. $1,000
B. $100,000
C. $1,000,000
D. $100,000,000
Daily Quiz:
3. Density is equal to
A. mass x volume
B. mass ÷ volume
C. volume ÷ mass
D. length x width x height
Daily Quiz:
3. Density is equal to
A. mass x volume
B. mass ÷ volume
C. volume ÷ mass
D. length x width x height
Daily Quiz:
4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?
A. mass = 36 g, vol = 12 cm3
B. mass = 9 g, vol = 1.5cm3
C. mass = 3 g, vol = 2 cm3
Daily Quiz:
4. Adamantium has a density of 6g/cm3. which of the following samples is made of adamantium?
A. mass = 36 g, vol = 12 cm3
B. mass = 9 g, vol = 1.5cm3
C. mass = 3 g, vol = 2 cm3
Tonight’s Homework:
• Read pages 31-33
• Work practice problems 12, 13, 14, 15, 16
Today we will…1. Learn about scientific notation
2. See the effect of adding 40 zeros to a number.
Used to write very big
and very small numbers.
Scientific Notation
•Move the decimal place so that the number is between 1 and 10
•Count how many spaces you moved the decimal point
•If you moved it to the left, the exponent is positive; to the right, it is negative.
Scientific Notation
The diameter of the sun is
1,390,000,000 m
Scientific Notation
The diameter of the sun is
1,390,000,000 m
1.39 x 109 m
Scientific Notation
The diameter of the sun is
1,390,000,000 m
1.39 x 109 m
Scientific Notation
factor exponent
The mass of a proton is
0.000,000,000,000,000,0
00,000,000,001,672,62 kg
Scientific Notation
The mass of a proton is
0.000,000,000,000,000,0
00,000,000,001,672,62 kg
1.672,62 x 10-27
Scientific Notation
Adding:
If the exponents are the same, add the factors and leave the exponents alone.
Scientific Notation
Adding numbers is easy if the exponent is the same.
7.35 x 102 m
+ 2.43 x 102 m
Scientific Notation
Adding numbers is easy if the exponent is the same.
7.35 x 102 m
+ 2.43 x 102 m
9.78 x 102 m
Scientific Notation
If the exponents are not the same, you have to move the decimal point on one of the numbers to make them the same.
Scientific Notation
4.38 x 106
+ 1.51 x 107
?
Scientific Notation
4.38 x 106
+ 1.51 x 107
1.51 x 107 = 15.1 x 106
Scientific Notation
4.38 x 106
+ 15.1 x 106
19.48 x 106
Scientific Notation
4.38 x 106
+ 15.1 x 106
19.48 x 106
Scientific Notation
Is this number between 1and 10?
4.38 x 106
+ 15.1 x 106
19.48 x 106
= 1.948 x 107
Scientific Notation
4.38 x 106
+ 15.1 x 106
19.48 x 106
= 1.948 x 107
Scientific Notation
The factorgot smaller
4.38 x 106
+ 15.1 x 106
19.48 x 106
= 1.948 x 107
Scientific Notation
The factorgot smaller
The exponent
gets bigger
Scientific Notation
Multiplying:
Multiply the factors and add the exponents. (The exponents do not have to be the same.)
2 x 104
x 3 x 105
6 x 109
Scientific Notation
Homework
• Read pages 31-33
• Work practice problems 12, 13, 14, 15, 16
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