Flu?
27 Oct 09
Students with any symptoms of the cold or the flu are asked to stay home until they recover.
Even if they believe their symptoms are minor, students are asked to stay home for the consideration of other students.
Students wishing to get tutoring at home through online tutoring can do so by contacting Simon at 403-400-6850.
Even if they believe their symptoms are minor, students are asked to stay home for the consideration of other students.
Students wishing to get tutoring at home through online tutoring can do so by contacting Simon at 403-400-6850.
DNA and RNA
19 Oct 09
What are the differences between DNA and RNA?
-deoxyribonucleic acid
-double helix
-lacks oxygen in its ribose sugar
-its nitrogenous bases are adenine, thymine, cytosine, and guanine
-ribonucleic acid
-single stranded
-contains oxygen in its ribose sugar
-its nitrogenous bases are adenine, uracil, cytosine, and guanine
-uracil replaces thymine in RNA
DNA
-deoxyribonucleic acid
-double helix
-lacks oxygen in its ribose sugar
-its nitrogenous bases are adenine, thymine, cytosine, and guanine
RNA
-ribonucleic acid
-single stranded
-contains oxygen in its ribose sugar
-its nitrogenous bases are adenine, uracil, cytosine, and guanine
-uracil replaces thymine in RNA
Chemistry: Energy Change
13 Oct 09
Determining when to use q=mc∆t and q=n∆H
Graph1. Change in Temperature of H2O
a) When there is a change in temperature or kinetic energy of an element or compound, q=mc∆t is used to determine the enthalpy (or energy) change.
In the graph above, regions A, C, and E display a change in temperature. Since ∆t represents a change in temperature, tf - ti, q=mc∆t is used to determine the energy change within those regions.
b) When an element or compound undergoes a change in phase, represented by regions B and D, q=n∆H is used to determine the enthalpy change within those regions.
Regions B and D show no change in temperature (kinetic energy). In B, ice melts into water. In D, water vaporizes. When there is a change in phase, no temperature change is observed; therefore, q=n∆H must be used to determine the enthalpy change.
Basic Exponents
11 Oct 09
Xa
X is the base, a is the exponent of the base
eg. X to the power of a
22 = 2 X 2 = 4
23 = 2 X 2 X 2 = 8
------------------------------------------------
Adding and Subtracting Exponents
23 + 22 = 8 + 4 = 12
23 + 22 = 8 - 4 = 4
------------------------------------------------
Multiplying and Diving Exponents
23 X 22 = 23+2 = 25 = 32
23 / 22 = 23-2 = 21 = 2
(22)3 = 22X3 = 26 = 64
X is the base, a is the exponent of the base
eg. X to the power of a
22 = 2 X 2 = 4
23 = 2 X 2 X 2 = 8
------------------------------------------------
Adding and Subtracting Exponents
23 + 22 = 8 + 4 = 12
23 + 22 = 8 - 4 = 4
------------------------------------------------
Multiplying and Diving Exponents
23 X 22 = 23+2 = 25 = 32
23 / 22 = 23-2 = 21 = 2
(22)3 = 22X3 = 26 = 64
Initial Projectile Velocities
07 Oct 09
Converting Velocities into its X and Y Components
Whenever a vector is given at angles other than 0o, 90o, 180o, 270o, or 360o, the vector just be broken into its X and Y components.
For the example above, the velocity of the projectile is 45 m/s at 30o to the horizon.
By using trig functions, we get the following setup:
Vx
cos 30o = Vx/45
Vx = 45cos(30o)
Vx = 38.9 m/s
Vy
sin 30o = Vy/45
Vy = 45 sin(30o)
Vy = 22.5 m/s
Whenever a question gives vectors at an angle, remember to convert the initial vector into its X and Y components by using trigonometric functions.
Whenever a vector is given at angles other than 0o, 90o, 180o, 270o, or 360o, the vector just be broken into its X and Y components.
For the example above, the velocity of the projectile is 45 m/s at 30o to the horizon.
By using trig functions, we get the following setup:
Vx
cos 30o = Vx/45
Vx = 45cos(30o)
Vx = 38.9 m/s
Vy
sin 30o = Vy/45
Vy = 45 sin(30o)
Vy = 22.5 m/s
Whenever a question gives vectors at an angle, remember to convert the initial vector into its X and Y components by using trigonometric functions.
Cold/Flu Season and School
05 Oct 09
It’s October and on days like today where the temperature is beginning to feel cold and with recorded signs of snow overnight, you know it’s the cold and flu season. The last thing anyone wants is to catch the cold or the flu especially with the current alarm of the H1N1 flu virus.
Well, what can you do as a student to prevent the spread of the cold and the flu in school?
1) Wash your hands thoroughly. Washing your hands does seem simple but just read Canada Health guide of washing your hands.
2) Keep an alcohol based hand sanitizer close.
3) Cough or sneeze into tissue, so keep some tissue in your pocket or backpack. As a last resort, cough or sneeze into your sleeve if there are no tissues close by.
4) Just be aware of the spots around school where you know it will be a potential place for infections like door knobs, stair rails or along the lockers.
5) Do not rub your eyes and avoid touching your face. Your eyes, nose and mouth are points of entry for bacteria and virus to infect your body.
6) Keep your immune system strong by sleeping well and eating healthy.
7) If you are feeling sick, stay home. Don’t risk spreading the cold or the flu to others.
If you’re curious about more information, Canada Health has a great link with all the information.
Well, what can you do as a student to prevent the spread of the cold and the flu in school?
1) Wash your hands thoroughly. Washing your hands does seem simple but just read Canada Health guide of washing your hands.
2) Keep an alcohol based hand sanitizer close.
3) Cough or sneeze into tissue, so keep some tissue in your pocket or backpack. As a last resort, cough or sneeze into your sleeve if there are no tissues close by.
4) Just be aware of the spots around school where you know it will be a potential place for infections like door knobs, stair rails or along the lockers.
5) Do not rub your eyes and avoid touching your face. Your eyes, nose and mouth are points of entry for bacteria and virus to infect your body.
6) Keep your immune system strong by sleeping well and eating healthy.
7) If you are feeling sick, stay home. Don’t risk spreading the cold or the flu to others.
If you’re curious about more information, Canada Health has a great link with all the information.
Naming Organic Compounds
01 Oct 09
Basic Hydrocarbons
Alkanes, CnH(2n+2)
- hydrocarbons containing single bonded carbon-carbon
- alkanes are saturated hydrocarbon which means it has the maximum number of hydrogens attached to the carbon chain
- CnH(2n+2)
- C2H6, C100H202,
- methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane
Alkenes, CnH2n
- hydrocarbon containing at least one double bond within the carbon carbon bonds
- alkenes are unsaturated hydrocarbons, thus, the carbon chain does not have the maximum number of hydrogens bonded to it
- CnH2n
- C2H4, C100H200,
-methene, ethene, propene, butene, pentene, hexene, heptene, octene, nonene, decene
Alkynes, CnH(2n-2)
- hydrocarbon containing at least one triple bond within the carbon carbon chain
- like alkenes, alkynes are unsaturated hydrocarbon
- CnH(2n-2), C2H4, C100H198
-methyne, ethyne, propyne, butyne, pentyne, hexyne, heptyne, octyne, nonyne, decyne
Alkanes, CnH(2n+2)
- hydrocarbons containing single bonded carbon-carbon
- alkanes are saturated hydrocarbon which means it has the maximum number of hydrogens attached to the carbon chain
- CnH(2n+2)
- C2H6, C100H202,
- methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane
Alkenes, CnH2n
- hydrocarbon containing at least one double bond within the carbon carbon bonds
- alkenes are unsaturated hydrocarbons, thus, the carbon chain does not have the maximum number of hydrogens bonded to it
- CnH2n
- C2H4, C100H200,
-methene, ethene, propene, butene, pentene, hexene, heptene, octene, nonene, decene
Alkynes, CnH(2n-2)
- hydrocarbon containing at least one triple bond within the carbon carbon chain
- like alkenes, alkynes are unsaturated hydrocarbon
- CnH(2n-2), C2H4, C100H198
-methyne, ethyne, propyne, butyne, pentyne, hexyne, heptyne, octyne, nonyne, decyne