All Notes for exam
All Notes
Volume Notes
Volume notes
Volume = L x W x H (AxBxC in book)
standard unit length: meter (m)
1 centimeter (1cm) = 0.01m
100cm= 1m
unit cube
- a small cube 1cm on each side
- it is 1 cubic cm (1cm3)
Volume of Liquid Notes
- use graduated cylinder to measure volume
- Always check the intervals or scale units = milliliter (mL) OR cm3
- 1mL = 1cm3
- Read from bottom of meniscus
Box questions (3-8 pg. 8)
3. 50 cm3
4. it is possible because the hight and width of box A is larger
5. 7.0cm3
6. a) 8
b) 27
c) 8cm3 + 27cm3
7. The second 1
8. Because the cane is not the same width apart in each spot
(the higher you go the more surface there is)
(As the surface increases the depth decreases)
Mass and Volume Notes
Mass and Volume Notes
- Objects that are mad of the same substance that have the same volume will have the same mass, regardless of their shape
- the mass of an object will double if it's volume doubles
- objects that have the same volume but are made of different substances will NOT have the same mass.
Ex: brass and aluminum cylinders
Mass Notes
Mass Notes
Earliest balance found in Egypt (approx. 7,000 yrs. old)
Mass: standard unit grams (g)
1 kilogram (kg) = 1,000 (g)
1 kg = 2.2 pounds (lbs)
Conservation of Mass Notes
Groups that posses no delta Mass (Consider sense of balance)
Law of conservation of mass:
In a closed system mass will remain constant, regardless of the actions of the processes inside the closed system.
Density Notes
Density Notes
- a characteristic property
- is specific to liquids and solids
- can help to identify substances
- Density = M/V
Other Notes
Histogram Notes
First thing to do- find the largest and the smallest number you must graph
Single Pan Balance Notes
- check that the pan is clean and dry
- always zero the balance before each massing
- Push all riders to zero
- use the adjustment knob if needed
4. Pick up the balance by the red bar only
5.Do not zero balance when done
Penny Notes
Before 1982: 95% Copper
5% Zinc
After: 1982: 2.5% Copper
97.5% Zinc
(because computer and technology was being invented, price of copper went up)
1943:
- penny was made of steel and zinc
- copper was needed for shell casings
- A 1943 copper penny was sold for $82,500