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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. The basicity constant Kb measures what?
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
P = F(v) = mg(v -terminal)
How strong a base is
They are directly proportional

2. In order to guarantee a non-zero spin how many electrons are needed?
Pascal (N*m^2)
The lowest whole number ratio of moles of each element in a mole of a cmpd
It has a positive oxidation potential so it is easily oxidized
An odd number

3. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
Ease of polarizability of the molecule and thus increasing molecular weight of mass
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

4. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
At an equal distance behind it as the object is in front of the mirror
The reaction between the base and water
The buoyant force on it; W = mg = pVg

5. What is the doppler equation for wavelength and frequency?
180 degrees; when there is half a wave distance in phase between two waves
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The current is the same

6. What is the principal quantum number (n)?
3+
Electron shell number
E = (kq)/r^2
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

7. What is the law of conservation of linear momentum?
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
Mv = mv
Cathode; anode
No - it increases the speed at which the rxn reaches that equilibrium

8. Why does light travel slower in an optically dense medium than through a vacuum?
The nucleus gains a proton and no neutrons
The path is longer on the inclined plane so it will take object longer to reach the bottom
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

9. Heat from friction comes from what?
The force along the board to the normal force
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Decreasing potential energy
Isolating an atom from minerals by decomposing the minerals with an electric current

10. What is newton's second law?
3+
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The element's mass number
A constant force on a mass causes it to have a constant acceleration

11. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
H has a small atomic radius
The nucleus gains a proton and no neutrons
That of static friction; there is a net accelerating force on the block once it starts to slide

12. What type of acid and base would produce a pH closest to 7?
When all the external forces = zero
It has a positive oxidation potential so it is easily oxidized
Strong acid and strong base/ weak acid and weak base
A saturated solution in which the aqueous ions are in equilibrium with the solid

13. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Polar
The particle's charge and the magnitude of the electric field
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

14. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
1000
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The element's mass number

15. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
Where an event took place
W = F(displacement)
You look at what is being oxidized and reduced in the problem

16. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
Cathode; anode
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
They are directly proportional

17. Always remember that velocity has ____ and ____
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
NO; reduction-oxidation
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Mag and direction

18. How do you balance redox rxns?

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19. What is usually conserved over oscillation periods?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
0 Hz because they are traveling side by side at the same speed
The cross-sectional area through which the fluid flows
Energy

20. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Colligative: it depends on the number of solute molecules in a given volume of water
NO; reduction-oxidation
The number of electrons emitted
Only temperature of the water bath

21. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
It will increase as well because they are directly related - only if pressure is kept constant
Where an event took place
Momentum

22. What is the equation for pressure?
The force along the board to the normal force
A constant force on a mass causes it to have a constant acceleration
Density (gravitational constant) height
That of static friction; there is a net accelerating force on the block once it starts to slide

23. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Add them together
Going from solid to gas phase
Look at how many times smaller the H concentration becomes with relation to rate law: if rate law says [H] is second order: ((10^-2)^2/(10^-1)^2 = 10^-2 and then times that answer by the original rate
Positive

24. What is the magnetic quantum number?
-l to +l
400 to 700 nm
T = 2pi/angular velocity; v/r
E = (kq)/r^2

25. The visible spectrum ranges from ____ to _____
B = pVg; density
The mass of an acid that yields one mole of H ions or the mass of a base that reacts with one mole of H ions
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
400 to 700 nm

26. What is sublimation?
Going from solid to gas phase
The reaction between the base and water
P = F(v) = mg(v -terminal)
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

27. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
It's weight = mg; the work would be the weight times the distance fell
[S][2S]^2 = 4S^3
V/m or N/C
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

28. In a rxn - how do you figure out which atom has the highest electron affinity?
A positron or electron; when atomic number goes up you know an electron has been emitted
The mass of an acid that yields one mole of H ions or the mass of a base that reacts with one mole of H ions
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
Yes - if the particle's trail is equidistant between two adjacent anodes

29. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
Add them together
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
No - it increases the speed at which the rxn reaches that equilibrium

30. What if the circuit elements are in series?
Its twice that distance
At an equal distance behind it as the object is in front of the mirror
The current is the same
T = 2pi/angular velocity; v/r

31. The probability of an X-ray emission event at a given wavelength is measured by what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The force along the board to the normal force
Its intensity in the spectrum

32. What is the formula for the power supplied by a battery to accelerate an electron beam?
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
Where an event took place
P = IV
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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

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34. In order to increase the kinetic energy of electrons - they must be what?
When all the external forces = zero
Mass number stays the same but the atomic number increases
At an equal distance behind it as the object is in front of the mirror
Accelerated by a higher voltage between the cathode and anode

35. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The current is the same
180 degrees; when there is half a wave distance in phase between two waves
When HIn is turned into In- - which is dependent upon the pKa of the indicator
(density[p])(volume)

36. What is the magnitude of the electric field produced by a point charge?
Density (gravitational constant) height
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
At an equal distance behind it as the object is in front of the mirror
E = (kq)/r^2

37. Beta decay is the same as what?
The force along the board to the normal force
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Positron emission
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

38. What is different between an inclined plane and free fall?
At an equal distance behind it as the object is in front of the mirror
The path is longer on the inclined plane so it will take object longer to reach the bottom
Positron because this is known as positron decay/electron capture
It will take longer to melt if the water bath is only at 90 degrees rather than 100 degrees because at 100 degrees the temperature is hotter and thus it will melt faster than at 90 degrees

39. A plane mirror produces an image where?
[A]^a[B]^b
At an equal distance behind it as the object is in front of the mirror
Positive
It minimizes the reabsorption of the light because the light must exit the scintillator to reach the photomultiplier where it is converted to an electrical pulse

40. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
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
Mass number stays the same but the atomic number increases
One mole of electric charge
Negative

41. How do you find wavelength if you known distance from adjacent crests and troughs?
Its twice that distance
External components of the circuit
It's weight = mg; the work would be the weight times the distance fell
The density of the water and volume of the lead object

42. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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43. What is the relationship between P and n in PV=nRT?
Going from solid to gas phase
They are directly proportional
Accelerated by a higher voltage between the cathode and anode
The force along the board to the normal force

44. What does the empirical formula show?
F =ma and F= qE
The cross-sectional area through which the fluid flows
The lowest whole number ratio of moles of each element in a mole of a cmpd
That of static friction; there is a net accelerating force on the block once it starts to slide

45. Terminal voltage is provided to what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
External components of the circuit
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

46. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
7 always!!!
One mole of electric charge
Strong acid and strong base/ weak acid and weak base

47. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
Positron emission
You look at what is being oxidized and reduced in the problem
The density of the water and volume of the lead object
Helium; 4

48. Nuclear masses can be approximated from what?

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49. What is the equation for bouyant force? What is p?
(+)
-l to +l
B = pVg; density
The force along the board to the normal force

50. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
That of static friction; there is a net accelerating force on the block once it starts to slide
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
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