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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.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
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
The element's mass number
The lowest one
Helium; 4

2. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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 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
Gravity
An odd number

3. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Only temperature of the water bath
Sp^3
The lowest whole number ratio of moles of each element in a mole of a cmpd
Momentum

4. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
One mole of electric charge
[A]^a[B]^b
(+)
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

5. The volume of an object is equal to water?
Polar
Liquid displaced by that object
(density[p])(volume)
An odd number

6. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
Half of the exponent
A positron or electron; when atomic number goes up you know an electron has been emitted
When all the external forces = zero

7. If you have circuit elements in parallel what is the same across them?
Voltage
In the presence of a base
0 Hz because they are traveling side by side at the same speed
3+

8. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
(+)
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The path is longer on the inclined plane so it will take object longer to reach the bottom

9. The square root of 10^anything is equal to what?
Half of the exponent
It decreases; the work done by the gas in expanding decreases its internal energy
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
It can also equal 'mg'; the compressive strength of a substance

10. How do you balance redox rxns?

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11. The closer the spacing of the anode wire - the better one can specify what?
The current is the same
Sp^3
Where an event took place
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

12. When does red litmus paper turn blue?
Helium; 4
In the presence of a base
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
The particle's charge and the magnitude of the electric field

13. When you are trying to calculate a galvanic cell's emf - what do you look at?
It's weight = mg; the work would be the weight times the distance fell
When HIn is turned into In- - which is dependent upon the pKa of the indicator
6.02 x 10^23 ions/mol
You look at what is being oxidized and reduced in the problem

14. How would you find rate of rxn from pH 1 to pH2?
It decreases; the work done by the gas in expanding decreases its internal energy
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
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The element's mass number

15. 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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16. Friction is caused by what?
Only temperature of the water bath
Yes - if the particle's trail is equidistant between two adjacent anodes
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Attractive molecular forces acting between material surfaces in contact

17. In general what is formed by an acid-base rxn?
Negative
A salt and water
It can also equal 'mg'; the compressive strength of a substance
P = F(v) = mg(v -terminal)

18. What is different between an inclined plane and free fall?
They do not differ
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
T = (2h/g)^1/2; distance = vt
The path is longer on the inclined plane so it will take object longer to reach the bottom

19. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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
When electron falls from high energy to low energy level
A constant force on a mass causes it to have a constant acceleration

20. What kind of geometry is octahedral?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
When you have central atom with six ions on it
6.02 x 10^23 ions/mol
The cross-sectional area through which the fluid flows

21. What is the principal quantum number (n)?
Decreasing potential energy
Add them together
Electron shell number
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

22. What kind of charge is on Al?
3+
The lowest whole number ratio of moles of each element in a mole of a cmpd
The path is longer on the inclined plane so it will take object longer to reach the bottom
Zero

23. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Going from solid to gas phase
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

24. What is the unit for Young's Modulus?
From peak to peak
Pascal (N*m^2)
The nucleus gains a proton and no neutrons
Colligative; the number of solute particles present

25. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Accelerated by a higher voltage between the cathode and anode
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
180 degrees; when there is half a wave distance in phase between two waves
Strong acid and strong base/ weak acid and weak base

26. If asked which electron configuration of an element is most stable which one do you choose?
The regular one
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Force times the distance over which the force acts
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

27. Hydrogen has what kind of standard oxidation or reduction potential?
Sp^3
(+)
Attractive molecular forces acting between material surfaces in contact
Zero

28. Nuclear masses can be approximated from what?

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29. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

30. What is one faraday equal to?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
One mole of electric charge
Positron emission

31. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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
Neutrons; atomic number

32. Beta decay is the emission of what? How do you know what it is the emission of?
The current is the same
H has a small atomic radius
It will increase as well because they are directly related - only if pressure is kept constant
A positron or electron; when atomic number goes up you know an electron has been emitted

33. 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?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The current is the same

34. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The reaction between the base and water
Strong acid and strong base/ weak acid and weak base
Mass number stays the same but the atomic number increases
When you have central atom with six ions on it

35. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
They are directly proportional
Going from solid to gas phase
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Faraday/electrons

36. How do you find 'g' from Newton's law of gravity?
Neutrons; atomic number
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

37. 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
[S][2S]^2 = 4S^3
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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

38. Isotopes have diff number of ______ but same what?
It will be reduced the voltage produced by the resistor which means IR; E- IR
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)
Neutrons; atomic number
V/m or N/C

39. What is the spin projection quantum number?
+/- 1/2
That of static friction; there is a net accelerating force on the block once it starts to slide
Positron emission
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

40. What is the relationship between P and n in PV=nRT?
Pascal (N*m^2)
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
They are directly proportional
It can also equal 'mg'; the compressive strength of a substance

41. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
The element's mass number
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
3+

42. The temperature of a metal will not increase above its melting point until what?
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
7 always!!!
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The regular one

43. Heat from friction comes from what?
Decreasing potential energy
You look at how many electrons are needed to reduce one cmpd and that number will be put in front of that cmpd and you do the same thing that's oxidized as well: review #38 on test #11
T = (2h/g)^1/2; distance = vt
Helium; 4

44. What is the law of conservation of linear momentum?
[A]^a[B]^b
Mv = mv
The buoyant force on it; W = mg = pVg
When electron falls from high energy to low energy level

45. What is the magnitude of the electric field produced by a point charge?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
E = (kq)/r^2
T = (2h/g)^1/2; distance = vt
The lowest whole number ratio of moles of each element in a mole of a cmpd

46. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
Mass number stays the same but the atomic number increases
They are directly proportional
In the presence of a base

47. Neither N2 or O2 have a permanent what? What does this mean?
A positron or electron; when atomic number goes up you know an electron has been emitted
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They increase because you hear a lower frequency
Energy

48. What is the equation for work done?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Ease of polarizability of the molecule and thus increasing molecular weight of mass
W = F(displacement)
F =ma and F= qE

49. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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50. What is the equation for a period (T)? What is the equation for angular velocity?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Energy
T = 2pi/angular velocity; v/r
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