Tutoring - Chem/Phys

Question 1

Sqrt 2

Answer 1

1.4

Question 2

Sqrt 3

Answer 2

1.7

Question 3

Sin 30

Answer 3

= Sqrt (1) / 2

= Cos 60

Question 4

Sin 45

Answer 4

= Sqrt (2) /2

= Cos 45

Question 5

Sin 60

Answer 5

= Sqrt (3) / 2

= Cos 30

Question 6

Log 0.01

Answer 6

-2

Question 7

Log 0.10

Answer 7

-1

Question 8

Log 1.0

Answer 8

0

Question 9

Log 10

Answer 9

1

Question 10

Log 100

Answer 10

2

Question 11

Ex:

Log 70

Answer 11

~ 1.7

Question 12

How do you draw vectors?

Answer 12

Tip to Tail

Question 13

Distance

Answer 13

Scalar

How much ground and object has covered during its motion

Question 14

Displacement

Answer 14

Vector
How far out of place an object is
Change in overall position

Question 15

Speed

Answer 15

Magnitude (no direction) —> Scalar

Question 16

Velocity

Answer 16

With direction
Change in displacement over time
(m/s)

Question 17

Acceleration

Answer 17

Change in velocity over time

m/s^2

Question 18

STP

Answer 18

0˚C = 273K

1 atm

Question 19

Standard (Lab) Conditions

Answer 19

25˚C = 298K

1 atm

Question 20

Human Body Temp

Answer 20

37˚C = 310K

Question 21

Fahrenheit to Celcius

Answer 21

(˚C x 1.8) + 32 = ˚F

Question 22

1 mol of Gas @ STP

Answer 22

= 22.4 L of volume

Question 23

Venturi Effect

Answer 23

Larger Radius to Smaller Radius —> Decrease in Pressure

Increase in Flow Rate

Question 24

Balancing Redox Reactions

Answer 24

1. Split into UNbalanced 1/2 reactions
2. Make sure all NON-oxygen and hydrogen atoms are balanced
3. Our method to add more oxygens is to add ENTIRE water molecules. Then add your hydrogens on the other side
4. Balance electrons
5. Cancel out your electrons to get your final answer

Question 25

Kinetic Molecular Theory

Answer 25

1. Gas particle size is negligible 2. Random motion w/ elastic collisions 3. Straight line motion in ALL directions, different speeds 4. Forces between gas particles are negligible 5. Average kinetic energy is proportional to temperature

Question 26

Heat

Answer 26

Transfer of energy between 2 things

Question 27

Temperature

Answer 27

Average Kinetic Energy

Question 28

Graham’s Law of Effusion

Answer 28

“Fat kid runs slow” | Heavy molecule —> slow speed

Question 29

Phase Diagrams

Answer 29

Holding temperature constant, increasing pressure —> phase change The temperature and pressure at which a substance is a S, L or G

Question 30

Phase Diagram of Hydrogen

Answer 30

Line tilts to the left (negative slope)

Question 31

Colligative Properties

Answer 31

Depends on the # of solute particles (not inherent nature 1. BP elevation 2. Freezing point depression 4. Vapor Pressure lowing 4. Osmotic pressure —> pressure required to STOP the process of osmosis

Question 32

Mole Fraction

Answer 32

Moles of solute / TOTAL moles of solution

Question 33

Molarity

Answer 33

Moles of solute / LITERS of solution

Question 34

Molality

Answer 34

Moles of solute / KG of SOLVENT

Question 35

+Q

Answer 35

Heat absorbed by the system

Question 36

-Q

Answer 36

Heat released by the system

Question 37

+w

Answer 37

Work done on the system

Question 38

-w

Answer 38

Word done by the system

Question 39

Delta G

Answer 39

- delta G = Exergonic = spontaneous 0 delta G = at equilibrium = no net RXN = no net transfer of energy + delta G = Endergonic

Question 40

Exergonic Rxns = - delta G

Answer 40

At ALL temp: - H , +S At LOW temp: - H , - S At HIGH temp: +H, +S

Question 41

Endergonic Rxns = +delta G

Answer 41

At ALL temp: +H, -S

Question 42

Gibbs Free Energy Equation

Answer 42

Delta G = Delta H - (Temp * Delta S)

Question 43

Specific Gravity

Answer 43

= Ratio of object’s density to water’s density

Question 44

Pressure

Answer 44

= Force over Area = F/A | = (N/m^2) = Pascal

Question 45

Archimedes principle

Answer 45

= upward buoyant force of fluid on an object is fluid density * volume of displaced fluid * gravity = buoyant force

Question 46

Pressure is greater at P2 than P1 because more fluid is pressing down

Answer 46

P2 = P1 + pgh 1. Vertical height difference 2. Same height = same pressure 3. Pressure same in all directions All lines originating at P1 have the same pressure (because they are originating at the same point)

Question 47

Incompressible fluids

Answer 47

``` f1 = f2 f= Av ```

Question 48

Viscosity

Answer 48

= thick / sticky

Question 49

Smooth flow

Answer 49

= streamline or laminar flow

Question 50

Bernoulli’s Equation for Laminar flow

Answer 50

Conditions Required: •Laminar flow / smooth/ streamline (H2O/blood) •Negligible viscosity •Steady flow rate •Incompressible fluids (usually just liquids) P1 + 1/2pv^2 + pgh = P2 + 1/2 pv^2 +pgh

Question 51

V efflux

Answer 51

= sqrt (2 g D) * velocity, not flow rate * Cylinder with hole

Question 52

Flow rate

Answer 52

= A • v | = Pi(r)^2 • v