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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. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
An odd number
Its intensity in the spectrum
Positive
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

2. In order to increase the kinetic energy of electrons - they must be what?
The element's mass number
Colligative; the number of solute particles present
Accelerated by a higher voltage between the cathode and anode
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

3. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
A constant force on a mass causes it to have a constant acceleration
It will be reduced the voltage produced by the resistor which means IR; E- IR
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

4. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
T = (2h/g)^1/2; distance = vt
Momentum
(+)
That they are catalysts in the rxn because they react with the substrate and are reformed

5. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
How strong a base is
[A]^a[B]^b
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

6. The boiling point of a solution is what type of property? Which means is depends only on what?
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
Colligative; the number of solute particles present
Mg
P = IV

7. If asked which electron configuration of an element is most stable which one do you choose?
That of static friction; there is a net accelerating force on the block once it starts to slide
The regular one
It's weight = mg; the work would be the weight times the distance fell
NO; reduction-oxidation

8. Neither N2 or O2 have a permanent what? What does this mean?
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
0 Hz because they are traveling side by side at the same speed
Pascal (N*m^2)

9. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Liquid displaced by that object
H has a small atomic radius
E = (kq)/r^2

10. 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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11. What is Newton's Universal Law of Gravitation?
Its twice that distance
The volume of the ice cube or whatever it is
Yes - if the particle's trail is equidistant between two adjacent anodes
F = GMm/r^2

12. A floating ice cube implies that it's weight is balanced by what?
When all the external forces = zero
A salt and water
The buoyant force on it; W = mg = pVg
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

13. The electrons emitted from cathode are replaced with what?
A salt and water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Electrons from anode and battery
Alkali metals = first column

14. What happens if an atom undergoes positron decay or electron capture?
Pascal (N*m^2)
Energy
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
It has a positive oxidation potential so it is easily oxidized

15. 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?
Mass number stays the same but the atomic number increases
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
One that has more solute particles per liter of solution
It has a positive oxidation potential so it is easily oxidized

16. Heat from friction comes from what?
(+)
Decreasing potential energy
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

17. A pendulum moves under the influence of what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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
Energy
Gravity

18. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
The volume of the ice cube or whatever it is
It's weight = mg; the work would be the weight times the distance fell
Polar

19. The number of incident photons on the cathode affect what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The number of electrons emitted
They are directly proportional
It will increase as well because they are directly related - only if pressure is kept constant

20. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
They are directly proportional
A positron or electron; when atomic number goes up you know an electron has been emitted

21. What direction do gravity and bouyancy work? What direction does water pressure work?
[S][2S]^2 = 4S^3
Vertically; perpendicular to all surfaces
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
It's weight = mg; the work would be the weight times the distance fell

22. In Bohr model of atom when is energy emitted?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The reaction between the base and water
Electrons from anode and battery
When electron falls from high energy to low energy level

23. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cross-sectional area through which the fluid flows
From peak to peak
Helium; 4
P = IV

24. Equivalent mass is what?
Sp^3
Helium; 4
Liquid displaced by that object
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

25. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
7 always!!!
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
In the presence of a base
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

26. When a falling mass is at terminal speed - what is the power expended by the air resistance?
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
P = F(v) = mg(v -terminal)
Total internal reflection
It decreases; the work done by the gas in expanding decreases its internal energy

27. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
The element's mass number
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The reaction between the base and water
F =ma and F= qE

28. Terminal voltage is provided to what?
A salt and water
They increase because you hear a lower frequency
External components of the circuit
The element's mass number

29. What is the formula for the power supplied by a battery to accelerate an electron beam?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
P = IV
Positron because this is known as positron decay/electron capture
From peak to peak

30. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
1000
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
Zero
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

31. The volume of an object is equal to water?
It will increase as well because they are directly related - only if pressure is kept constant
That it is negative
Liquid displaced by that object
W = F(displacement)

32. 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
Density (gravitational constant) height
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Its intensity in the spectrum

33. What is the amt of energy that a frictional force generates?
An odd number
They are directly proportional
Force times the distance over which the force acts
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

34. In PV=nRT - if temp increases what will happen to volume?
It will increase as well because they are directly related - only if pressure is kept constant
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Vertically; perpendicular to all surfaces
F =ma and F= qE

35. What is usually conserved over oscillation periods?
Only temperature of the water bath
Voltage
Energy
Faraday/electrons

36. Mechanical waves in a medium fxn to transport what?
Helium; 4
Energy
The reaction between the base and water
Density (gravitational constant) height

37. A nearsighted person has what type of focal length? Thus what do we do to correct this?
P = IV
Colligative; the number of solute particles present
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The reaction between the base and water

38. Nuclear masses can be approximated from what?

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39. What is different between an inclined plane and free fall?
Mv = mv
The path is longer on the inclined plane so it will take object longer to reach the bottom
+/- 1/2
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

40. What is weight equal to?
Mg
A constant force on a mass causes it to have a constant acceleration
In the presence of a base
A saturated solution in which the aqueous ions are in equilibrium with the solid

41. What is the equation for pressure?
Density (gravitational constant) height
Pascal (N*m^2)
(density[p])(volume)
Cathode; anode

42. In a rxn - how do you figure out which atom has the highest electron affinity?
F = GMm/r^2
It can absorb light that lets other electrons fill those orbitals
[A]^a[B]^b
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

43. Beta decay is the same as what?
The element's mass number
Positron because this is known as positron decay/electron capture
Positron emission
They increase because you hear a lower frequency

44. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Half of the exponent
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
Alkali metals = first column

45. If temperature arises during a mixture what can you conclude about the enthalpy?
It's weight = mg; the work would be the weight times the distance fell
That it is negative
They are directly proportional
L = wavelength/2 so L= (wavelength)(2)

46. When is a body in translational equilibrium?
Force times the distance over which the force acts
Neutrons; atomic number
Gravity
When all the external forces = zero

47. What kind of charge is on Al?
Voltage
Polar
Helium; 4
3+

48. How many mL is in one liter?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
1000
Helium; 4
You look at what is being oxidized and reduced in the problem

49. What is the equation for bouyant force? What is p?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
B = pVg; density

50. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
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
That they are catalysts in the rxn because they react with the substrate and are reformed
The lowest whole number ratio of moles of each element in a mole of a cmpd
0 Hz because they are traveling side by side at the same speed