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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Isolating an atom from minerals by decomposing the minerals with an electric current

2. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
One mole of electric charge
That they are catalysts in the rxn because they react with the substrate and are reformed
Density (gravitational constant) height

3. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
That they are catalysts in the rxn because they react with the substrate and are reformed
The buoyant force on it; W = mg = pVg
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

4. The temperature of a metal will not increase above its melting point until what?
The cross-sectional area through which the fluid flows
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
W = F(displacement)
F = GMm/r^2

5. Friction is caused by what?
Where an event took place
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Attractive molecular forces acting between material surfaces in contact
From peak to peak

6. Half-sine wave shape is what kind of wavelength with regards to length?
H has a small atomic radius
Mass number stays the same but the atomic number increases
Going from solid to gas phase
L = wavelength/2 so L= (wavelength)(2)

7. What is the spin projection quantum number?
A positron or electron; when atomic number goes up you know an electron has been emitted
+/- 1/2
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Ability to locate an event in space

8. In a rxn - how do you figure out which atom has the highest electron affinity?
The element's mass number
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
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

9. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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 buoyant force on it; W = mg = pVg
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
W = F(displacement)

10. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
The volume of the ice cube or whatever it is
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It can absorb light that lets other electrons fill those orbitals

11. What if the circuit elements are in series?
+/- 1/2
The current is the same
It will increase as well because they are directly related - only if pressure is kept constant
They must balance

12. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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
Sp^3
Isolating an atom from minerals by decomposing the minerals with an electric current

13. What kind of charge is on Al?
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
3+
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
One mole of electric charge

14. Neither N2 or O2 have a permanent what? What does this mean?
How strong a base is
7 always!!!
It's weight = mg; h
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

15. 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?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Positron because this is known as positron decay/electron capture
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

16. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
When electron falls from high energy to low energy level
Force times the distance over which the force acts
Alkali metals = first column
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

17. If the standard potential for a rxn is negative when it is being reduced (thus a negative reduction potential) that means that the resulting atom has what?
It has a positive oxidation potential so it is easily oxidized
Constant to overcome the heat of fusion (solid to liquid state)
Positive
It can absorb light that lets other electrons fill those orbitals

18. A pendulum moves under the influence of what?
Total internal reflection
Gravity
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

19. What kind of metals react violently with water?
Decreasing potential energy
Alkali metals = first column
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
A constant force on a mass causes it to have a constant acceleration

20. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Half of the exponent
Colligative: it depends on the number of solute molecules in a given volume of water
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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

21. Can a charged particle be detected by two anodes?

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22. What is the amt of energy that a frictional force generates?
Energy
Force times the distance over which the force acts
F =ma and F= qE
It will be reduced the voltage produced by the resistor which means IR; E- IR

23. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Force times the distance over which the force acts
Helium; 4
[S][2S]^2 = 4S^3
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

24. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Faraday/electrons
Ability to locate an event in space
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)

25. Always remember that velocity has ____ and ____
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
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
How strong a base is
Mag and direction

26. Acetic acid is a ______ solvent
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
P = IV
Polar
That they are catalysts in the rxn because they react with the substrate and are reformed

27. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Decreasing potential energy
It can also equal 'mg'; the compressive strength of a substance
NO; reduction-oxidation
Negative

28. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The density of the water and volume of the lead object
F =ma and F= qE
One that has more solute particles per liter of solution

29. The coefficient of static friction is the ratio of what?
Electrons from anode and battery
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 force along the board to the normal force
They must balance

30. In order to increase the kinetic energy of electrons - they must be what?
It can also equal 'mg'; the compressive strength of a substance
Accelerated by a higher voltage between the cathode and anode
The lowest whole number ratio of moles of each element in a mole of a cmpd
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

31. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
A constant force on a mass causes it to have a constant acceleration
From peak to peak
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

32. Mechanical waves in a medium fxn to transport what?
The volume of the ice cube or whatever it is
0 Hz because they are traveling side by side at the same speed
Energy
Zero

33. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
-l to +l
Strong acid and strong base/ weak acid and weak base
They do not differ

34. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Mag and direction
The density of the water and volume of the lead object
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Only temperature of the water bath

35. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
[S][2S]^2 = 4S^3
The cross-sectional area through which the fluid flows
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Mag and direction

36. What energy conversion describes best what takes place in a battery-powered resistive circuit?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It's weight = mg; the work would be the weight times the distance fell
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

37. How do you find 'g' from Newton's law of gravity?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
A constant force on a mass causes it to have a constant acceleration
Energy
Accelerated by a higher voltage between the cathode and anode

38. What is Avagadro's number regarding ions/mol?
That it is negative
A constant force on a mass causes it to have a constant acceleration
6.02 x 10^23 ions/mol
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

39. What direction do gravity and bouyancy work? What direction does water pressure work?
Constant to overcome the heat of fusion (solid to liquid state)
The force along the board to the normal force
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Vertically; perpendicular to all surfaces

40. When an element decreases its atomic number by one what is emitted?
(+)
Positron because this is known as positron decay/electron capture
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
Gravity

41. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Liquid displaced by that object
Yes - if the particle's trail is equidistant between two adjacent anodes
Mg
Mass number stays the same but the atomic number increases

42. The electrons emitted from cathode are replaced with what?
The reaction between the base and water
Electrons from anode and battery
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
Polar

43. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
It can absorb light that lets other electrons fill those orbitals
Decreasing potential energy
Its intensity in the spectrum

44. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
Alkali metals = first column
That it is negative
Cathode; anode

45. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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46. What is the unit for Young's Modulus?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The volume of the ice cube or whatever it is
Pascal (N*m^2)
Constant to overcome the heat of fusion (solid to liquid state)

47. Beta decay is the emission of what? How do you know what it is the emission of?
Mv = mv
A positron or electron; when atomic number goes up you know an electron has been emitted
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
Sp^3

48. 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
They do not differ
Negative
The regular one

49. The coefficient of kinetic friction is always lower than what? Therefore what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That of static friction; there is a net accelerating force on the block once it starts to slide
Its intensity in the spectrum
It can also equal 'mg'; the compressive strength of a substance

50. The probability of an X-ray emission event at a given wavelength is measured by what?
They must balance
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
Gravity
Its intensity in the spectrum