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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 one faraday equal to?
(density[p])(volume)
One mole of electric charge
Sp^3
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

2. What is Newton's Universal Law of Gravitation?
Where an event took place
It can absorb light that lets other electrons fill those orbitals
F = GMm/r^2
When all the external forces = zero

3. What type of acid and base would produce a pH closest to 7?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Strong acid and strong base/ weak acid and weak base
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Cathode; anode

4. 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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5. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
The lowest one
3+
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Liquid displaced by that object

6. When you are trying to calculate a galvanic cell's emf - what do you look at?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Electrons from anode and battery
Constant to overcome the heat of fusion (solid to liquid state)
You look at what is being oxidized and reduced in the problem

7. What is a metathesis rxn?
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
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
When you have central atom with six ions on it

8. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
(+)
The lowest one
B = pVg; density
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

9. The range of pH in which a color change takes place in a titration depends on what?
Cathode; anode
Zero
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

10. 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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
When electron falls from high energy to low energy level
Pascal (N*m^2)
Attractive molecular forces acting between material surfaces in contact

11. When is a body in translational equilibrium?
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
It can also equal 'mg'; the compressive strength of a substance
When all the external forces = zero
L = wavelength/2 so L= (wavelength)(2)

12. 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's weight = mg; h
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It has a positive oxidation potential so it is easily oxidized
Accelerated by a higher voltage between the cathode and anode

13. 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?
W = F(displacement)
Force times the distance over which the force acts
E = (kq)/r^2
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

14. 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
The force along the board to the normal force
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
Mass number stays the same but the atomic number increases

15. What is the doppler equation for wavelength and frequency?
No - it increases the speed at which the rxn reaches that equilibrium
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Cathode; anode

16. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Its twice that distance
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Its momentum is zero because velocity is zero; zero because of conservation of momentum

17. Mechanical waves in a medium fxn to transport what?
Energy
0 Hz because they are traveling side by side at the same speed
That of static friction; there is a net accelerating force on the block once it starts to slide
Sp^3

18. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Mass number stays the same but the atomic number increases
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)

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?
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
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
Colligative; the number of solute particles present
F =ma and F= qE

20. What is the equation for pressure?
The cross-sectional area through which the fluid flows
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Density (gravitational constant) height
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

21. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
It's weight = mg; h
They do not differ
When you have central atom with six ions on it
It can absorb light that lets other electrons fill those orbitals

22. What happens if an atom undergoes positron decay or electron capture?
P = IV
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
[S][2S]^2 = 4S^3
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

23. Why does light travel slower in an optically dense medium than through a vacuum?
Strong acid and strong base/ weak acid and weak base
The density of the water and volume of the lead object
The lowest whole number ratio of moles of each element in a mole of a cmpd
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

24. How do you find length of time something is in flight? How do you find distance it traveled?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
T = (2h/g)^1/2; distance = vt
Energy
Electron shell number

25. What is the relationship between P and n in PV=nRT?
A saturated solution in which the aqueous ions are in equilibrium with the solid
They are directly proportional
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Neutrons; atomic number

26. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Total internal reflection
NO; reduction-oxidation
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
0 Hz because they are traveling side by side at the same speed

27. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Energy
Positron emission
Mg
The nucleus gains a proton and no neutrons

28. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Isolating an atom from minerals by decomposing the minerals with an electric current
Cathode; anode
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

29. Terminal voltage is provided to what?
P = IV
External components of the circuit
Constant to overcome the heat of fusion (solid to liquid state)
When electron falls from high energy to low energy level

30. 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?
No - it increases the speed at which the rxn reaches that equilibrium
(density[p])(volume)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Only temperature of the water bath

31. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
When all the external forces = zero
It's weight = mg; the work would be the weight times the distance fell
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

32. The boiling point of a solution is what type of property? Which means is depends only on what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
They must balance
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
Colligative; the number of solute particles present

33. The free energy change (G) must be negative when what?
Negative
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
H = negative and S = positive
Mag and direction

34. How do you find specific gravity of an object?
Alkali metals = first column
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
The number of electrons emitted
Colligative; the number of solute particles present

35. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
External components of the circuit
7 always!!!
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

36. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Only temperature of the water bath
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
A saturated solution in which the aqueous ions are in equilibrium with the solid
400 to 700 nm

37. Nuclear masses can be approximated from what?

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38. How many mL is in one liter?
1000
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Ease of polarizability of the molecule and thus increasing molecular weight of mass
[S][2S]^2 = 4S^3

39. Hydrogen has what kind of standard oxidation or reduction potential?
The reaction between the base and water
When you have central atom with six ions on it
It can also equal 'mg'; the compressive strength of a substance
Zero

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?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Liquid displaced by that object
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 mass number stays the number but the atomic number decreases by one - usually resulting in another element

41. The Ksp for a substance of AaBb is what?
It can absorb light that lets other electrons fill those orbitals
In the presence of a base
[A]^a[B]^b
It's weight = mg; h

42. What is the equation for work done?
It can also equal 'mg'; the compressive strength of a substance
Attractive molecular forces acting between material surfaces in contact
W = F(displacement)
Its momentum is zero because velocity is zero; zero because of conservation of momentum

43. How do you figure out the literature Ksp value of a compound?
When all the external forces = zero
Its intensity in the spectrum
A saturated solution in which the aqueous ions are in equilibrium with the solid
One that has more solute particles per liter of solution

44. The electrical force on a particle depends on what?

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45. The probability of an X-ray emission event at a given wavelength is measured by what?
Pascal (N*m^2)
Neutrons; atomic number
In the presence of a base
Its intensity in the spectrum

46. In order to guarantee a non-zero spin how many electrons are needed?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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
Where an event took place
An odd number

47. What does spatial resolution refer to?
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
Ability to locate an event in space
When electron falls from high energy to low energy level
The element's mass number

48. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
W = F(displacement)
Yes - if the particle's trail is equidistant between two adjacent anodes
Momentum

49. How should the period of a waveform be calculated?
One mole of electric charge
From peak to peak
Red
You look at what is being oxidized and reduced in the problem

50. In radioactive decay the atomic number (A) and mass number (Z) must what?
(density[p])(volume)
They must balance
6.02 x 10^23 ions/mol
[A]^a[B]^b