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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. 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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2. What is usually conserved over oscillation periods?
Half of the exponent
It can also equal 'mg'; the compressive strength of a substance
Yes - if the particle's trail is equidistant between two adjacent anodes
Energy

3. Friction is caused by what?
B = pVg; density
The element's mass number
Attractive molecular forces acting between material surfaces in contact
External components of the circuit

4. What is the equation for bouyant force? What is p?
Colligative: it depends on the number of solute molecules in a given volume of water
0 Hz because they are traveling side by side at the same speed
B = pVg; density
A salt and water

5. The probability of an X-ray emission event at a given wavelength is measured by what?
That they are catalysts in the rxn because they react with the substrate and are reformed
One mole of electric charge
Pascal (N*m^2)
Its intensity in the spectrum

6. In Bohr model of atom when is energy emitted?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
It has a positive oxidation potential so it is easily oxidized
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

7. When a falling mass is at terminal speed - what is the power expended by the air resistance?
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
P = F(v) = mg(v -terminal)
+/- 1/2

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

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9. What is the unit for Young's Modulus?
NO; reduction-oxidation
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
The regular one
Pascal (N*m^2)

10. What is the law of conservation of linear momentum?
The current is the same
Ability to locate an event in space
It's weight = mg; the work would be the weight times the distance fell
Mv = mv

11. Terminal voltage is provided to what?
They increase because you hear a lower frequency
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
Alkali metals = first column
External components of the circuit

12. A nearsighted person has what type of focal length? Thus what do we do to correct this?
A saturated solution in which the aqueous ions are in equilibrium with the solid
It can also equal 'mg'; the compressive strength of a substance
0 Hz because they are traveling side by side at the same speed
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

13. The total pressure of a solution is what? Give example.
Colligative: it depends on the number of solute molecules in a given volume of water
[A]^a[B]^b
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
In the presence of a base

14. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
It can also equal 'mg'; the compressive strength of a substance
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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

15. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The density of the water and volume of the lead object
It will be reduced the voltage produced by the resistor which means IR; E- IR
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

16. The coefficient of static friction is the ratio of what?
Where an event took place
The force along the board to the normal force
Neutrons; atomic number
Positron emission

17. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
L = wavelength/2 so L= (wavelength)(2)
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 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

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
E = (kq)/r^2
Where an event took place
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

19. Is the work done by air resistance - positive or negative?
Positron because this is known as positron decay/electron capture
Negative
When electron falls from high energy to low energy level
They do not differ

20. The visible spectrum ranges from ____ to _____
Vertically; perpendicular to all surfaces
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
400 to 700 nm

21. What is the relationship between P and n in PV=nRT?
They are directly proportional
The current is the same
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

22. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
V/m or N/C
Alkali metals = first column
A positron or electron; when atomic number goes up you know an electron has been emitted

23. What does spatial resolution refer to?
The lowest whole number ratio of moles of each element in a mole of a cmpd
W = F(displacement)
Mg
Ability to locate an event in space

24. 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?
H has a small atomic radius
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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

25. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Liquid displaced by that object
From peak to peak

26. When you are trying to calculate a galvanic cell's emf - what do you look at?
How strong a base is
Helium; 4
You look at what is being oxidized and reduced in the problem
They do not differ

27. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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 cross-sectional area through which the fluid flows
The reaction between the base and water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

28. In order to increase the kinetic energy of electrons - they must be what?
The number of electrons emitted
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
Accelerated by a higher voltage between the cathode and anode
A saturated solution in which the aqueous ions are in equilibrium with the solid

29. 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
Mg
From peak to peak
Voltage

30. 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
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
Colligative: it depends on the number of solute molecules in a given volume of water
Neutrons; atomic number

31. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Pascal (N*m^2)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It has a positive oxidation potential so it is easily oxidized
Positive

32. When is a body in translational equilibrium?
The cross-sectional area through which the fluid flows
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The number of electrons emitted
When all the external forces = zero

33. What is conserved in an inellastic collision?
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
(density[p])(volume)
Momentum
Only temperature of the water bath

34. The free energy change (G) must be negative when what?
Positive
H = negative and S = positive
Decreasing potential energy
Energy

35. What is the amt of energy that a frictional force generates?
Momentum
Force times the distance over which the force acts
Electron shell number
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

36. What do electrolytic techniques involve?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Isolating an atom from minerals by decomposing the minerals with an electric current
6.02 x 10^23 ions/mol
Accelerated by a higher voltage between the cathode and anode

37. Neither N2 or O2 have a permanent what? What does this mean?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
Mag and direction

38. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
T = (2h/g)^1/2; distance = vt
That it is negative
A positron or electron; when atomic number goes up you know an electron has been emitted
They do not differ

39. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
Mg
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

40. What type of acid and base would produce a pH closest to 7?
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
Helium; 4
Strong acid and strong base/ weak acid and weak base
+/- 1/2

41. What would the force be of a block on a pulley? What would be its displacement?

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42. What is the principal quantum number (n)?
The number of electrons emitted
When electron falls from high energy to low energy level
Electron shell number
An odd number

43. What is the equation for pressure?
Helium; 4
Alkali metals = first column
Sp^3
Density (gravitational constant) height

44. Beta decay is the emission of what? How do you know what it is the emission of?
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
A positron or electron; when atomic number goes up you know an electron has been emitted
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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

45. Why are bonds between H and another atom shorter compared to most?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
That of static friction; there is a net accelerating force on the block once it starts to slide
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
H has a small atomic radius

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?
V/m or N/C
Add them together
T = (2h/g)^1/2; distance = vt
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

47. What does the empirical formula show?
H = negative and S = positive
The lowest whole number ratio of moles of each element in a mole of a cmpd
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That they are catalysts in the rxn because they react with the substrate and are reformed

48. What kind of geometry is octahedral?
Colligative; the number of solute particles present
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
When you have central atom with six ions on it
Positron emission

49. 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?
-l to +l
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 buoyant force on it; W = mg = pVg
Its momentum is zero because velocity is zero; zero because of conservation of momentum

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

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