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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is the equation for pressure?
Mg
Density (gravitational constant) height
L = wavelength/2 so L= (wavelength)(2)
When HIn is turned into In- - which is dependent upon the pKa of the indicator

2. What is the spin projection quantum number?
Positron because this is known as positron decay/electron capture
+/- 1/2
Strong acid and strong base/ weak acid and weak base
Ease of polarizability of the molecule and thus increasing molecular weight of mass

3. The closer the spacing of the anode wire - the better one can specify what?
180 degrees; when there is half a wave distance in phase between two waves
Where an event took place
Ability to locate an event in space
(+)

4. What type of acid and base would produce a pH closest to 7?
Pascal (N*m^2)
Strong acid and strong base/ weak acid and weak base
Neutrons; atomic number
Electron shell number

5. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Only temperature of the water bath
The density of the water and volume of the lead object
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

6. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
It has a positive oxidation potential so it is easily oxidized
F = GMm/r^2
The element's mass number

7. What is usually conserved over oscillation periods?
You look at what is being oxidized and reduced in the problem
Energy
The volume of the ice cube or whatever it is
180 degrees; when there is half a wave distance in phase between two waves

8. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The particle's charge and the magnitude of the electric field
That they are catalysts in the rxn because they react with the substrate and are reformed
No - it increases the speed at which the rxn reaches that equilibrium

9. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
One mole of electric charge
The element's mass number
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
0 Hz because they are traveling side by side at the same speed

10. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
Accelerated by a higher voltage between the cathode and anode
Negative

11. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
Momentum
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

12. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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13. In a rxn - how do you figure out which atom has the highest electron affinity?
Colligative; the number of solute particles present
Look at the reactants and see which atom is being reduced - since it accepts the electron readily and is reduced we can assume it has the highest electron affinity
When you have central atom with six ions on it
Mass number stays the same but the atomic number increases

14. Heat from friction comes from what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Decreasing potential energy
Mv = mv
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

15. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
How strong a base is
When you have central atom with six ions on it
Only temperature of the water bath
Total internal reflection

16. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
When electron falls from high energy to low energy level
No - it increases the speed at which the rxn reaches that equilibrium
How strong a base is
It will be reduced the voltage produced by the resistor which means IR; E- IR

17. In PV=nRT - if temp increases what will happen to volume?
Cathode; anode
It will increase as well because they are directly related - only if pressure is kept constant
Gravity
A saturated solution in which the aqueous ions are in equilibrium with the solid

18. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
How much energy is needed to raise one gram of a substance one degree celcius; it tells that you need more energy to increase temperature
An odd number
The particle's charge and the magnitude of the electric field
Colligative: it depends on the number of solute molecules in a given volume of water

19. If asked which electron configuration of an element is most stable which one do you choose?
+/- 1/2
How much energy is needed to raise one gram of a substance one degree celcius; it tells that you need more energy to increase temperature
Ability to locate an event in space
The regular one

20. Is the work done by air resistance - positive or negative?
Negative
Vertically; perpendicular to all surfaces
6.02 x 10^23 ions/mol
Only temperature of the water bath

21. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another
Colligative; the number of solute particles present
1000

22. The free energy change (G) must be negative when what?
How strong a base is
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
H = negative and S = positive
Going from solid to gas phase

23. What is weight equal to?
Mg
H has a small atomic radius
Strong acid and strong base/ weak acid and weak base
Helium; 4

24. When something is falling what is the force acting on it? Thus what would be the work done?

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25. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
When HIn is turned into In- - which is dependent upon the pKa of the indicator
A function of the total number of molecules; if there is one mol of CO2 for every 2 mol of H20 then H20 is 2/3 the total pressure
Decreasing potential energy

26. What is the equation for bouyant force? What is p?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
B = pVg; density
Half of the exponent

27. Why are bonds between H and another atom shorter compared to most?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
H has a small atomic radius
Its intensity in the spectrum

28. The concentration of OH and H30 ions are approximately equal at what pH?
Alkali metals = first column
7 always!!!
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Sp^3

29. If you have circuit elements in parallel what is the same across them?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Accelerated by a higher voltage between the cathode and anode
Voltage
Polar

30. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
The particle's charge and the magnitude of the electric field
It's weight = mg; h
It decreases; the work done by the gas in expanding decreases its internal energy
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

31. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
A function of the total number of molecules; if there is one mol of CO2 for every 2 mol of H20 then H20 is 2/3 the total pressure
T = (2h/g)^1/2; distance = vt

32. When does red litmus paper turn blue?
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
In the presence of a base
Electron shell number

33. Beta decay is the same as what?
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another
Positron because this is known as positron decay/electron capture
Positron emission
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

34. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
[A]^a[B]^b
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

35. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
Sp^3
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
It's weight = mg; the work would be the weight times the distance fell

36. In Bohr model of atom when is energy emitted?
-l to +l
Zero
When electron falls from high energy to low energy level
When you have central atom with six ions on it

37. What kind of charge is on Al?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The buoyant force on it; W = mg = pVg
NO; reduction-oxidation
3+

38. What is Newton's Universal Law of Gravitation?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
A saturated solution in which the aqueous ions are in equilibrium with the solid
F = GMm/r^2
When HIn is turned into In- - which is dependent upon the pKa of the indicator

39. What does spatial resolution refer to?
Mag and direction
Ability to locate an event in space
They do not differ
It can also equal 'mg'; the compressive strength of a substance

40. Why does light travel slower in an optically dense medium than through a vacuum?
They do not differ
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Mass per unit volume compared to water: so if mass is 15 g and displaces 5g of benzene the ratio of object to liquid mass is 15/5 = 3 and then times 3 by the specific gravity of benzene which is 0.7

41. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Going from solid to gas phase
P = IV
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Its twice that distance

42. What is the magnetic quantum number?
H = negative and S = positive
T = 2pi/angular velocity; v/r
Density (gravitational constant) height
-l to +l

43. In radioactive decay the atomic number (A) and mass number (Z) must what?
One that has more solute particles per liter of solution
It is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
That they are catalysts in the rxn because they react with the substrate and are reformed
They must balance

44. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
Pascal (N*m^2)
V/m or N/C

45. F in the Young's modulus equation can also equal what? What is E?

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46. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Add them together

47. The basicity constant Kb measures what?
The buoyant force on it; W = mg = pVg
How strong a base is
Strong acid and strong base/ weak acid and weak base
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

48. The square root of 10^anything is equal to what?
How strong a base is
Half of the exponent
The volume of the ice cube or whatever it is
Faraday/electrons

49. A floating ice cube implies that it's weight is balanced by what?
+/- 1/2
The buoyant force on it; W = mg = pVg
0 Hz because they are traveling side by side at the same speed
Force times the distance over which the force acts

50. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
The regular one
A function of the total number of molecules; if there is one mol of CO2 for every 2 mol of H20 then H20 is 2/3 the total pressure
A saturated solution in which the aqueous ions are in equilibrium with the solid