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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. What are the units of an electric field?
Liquid displaced by that object
V/m or N/C
That it is negative
The path is longer on the inclined plane so it will take object longer to reach the bottom

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

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3. What kind of geometry is octahedral?
When you have central atom with six ions on it
Energy
Polar
They increase because you hear a lower frequency

4. What is the law of conservation of linear momentum?
In the presence of a base
Mv = mv
That it is negative
Mag and direction

5. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
0 Hz because they are traveling side by side at the same speed
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
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

6. Mechanical waves in a medium fxn to transport what?
Energy
(density[p])(volume)
A saturated solution in which the aqueous ions are in equilibrium with the solid
It's weight = mg; h

7. A floating ice cube implies that it's weight is balanced by 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
It will increase as well because they are directly related - only if pressure is kept constant
Faraday/electrons
The buoyant force on it; W = mg = pVg

8. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Colligative; the number of solute particles present
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The lowest whole number ratio of moles of each element in a mole of a cmpd

9. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Attractive molecular forces acting between material surfaces in contact
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Helium; 4
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

10. How do you find wavelength if you known distance from adjacent crests and troughs?
6.02 x 10^23 ions/mol
Strong acid and strong base/ weak acid and weak base
Its twice that distance
180 degrees; when there is half a wave distance in phase between two waves

11. How do you balance redox rxns?

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12. What does spatial resolution refer to?
Positron because this is known as positron decay/electron capture
Ability to locate an event in space
The force along the board to the normal force
From peak to peak

13. If asked which electron configuration of an element is most stable which one do you choose?
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 regular one
Mag and direction
Constant to overcome the heat of fusion (solid to liquid state)

14. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The element's mass 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
The cross-sectional area through which the fluid flows
H = negative and S = positive

15. 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?
[A]^a[B]^b
E = (kq)/r^2
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^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

16. A pendulum moves under the influence of what?
Gravity
The nucleus gains a proton and no neutrons
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
That they are catalysts in the rxn because they react with the substrate and are reformed

17. The volume of an object is equal to water?
The force along the board to the normal force
Sp^3
Liquid displaced by that object
When electron falls from high energy to low energy level

18. Neither N2 or O2 have a permanent what? What does this mean?
Strong acid and strong base/ weak acid and weak base
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
An odd number

19. What is the relationship between P and n in PV=nRT?
They are directly proportional
Only temperature of the water bath
Decreasing potential energy
Colligative: it depends on the number of solute molecules in a given volume of water

20. What energy conversion describes best what takes place in a battery-powered resistive circuit?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The cross-sectional area through which the fluid flows
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Neutrons; atomic number

21. In general what is formed by an acid-base rxn?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Positron because this is known as positron decay/electron capture
Electrons from anode and battery
A salt and water

22. Equivalent mass is what?
0 Hz because they are traveling side by side at the same speed
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
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 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

23. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Mg
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The reaction between the base and water
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

24. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Mag and direction
That it is negative
400 to 700 nm

25. What is a metathesis rxn?
The number of electrons emitted
(density[p])(volume)
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
An odd number

26. Beta decay is the emission of what? How do you know what it is the emission of?
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
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
Alkali metals = first column

27. How many mL is in one liter?
It can absorb light that lets other electrons fill those orbitals
1000
It can also equal 'mg'; the compressive strength of a substance
From peak to peak

28. Why are bonds between H and another atom shorter compared to most?
Add them together
H has a small atomic radius
The reaction between the base and water
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

29. When is a body in translational equilibrium?
The regular one
When all the external forces = zero
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
[S][2S]^2 = 4S^3

30. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
E = (kq)/r^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
Ease of polarizability of the molecule and thus increasing molecular weight of mass

31. What is one faraday equal to?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
A saturated solution in which the aqueous ions are in equilibrium with the solid
One mole of electric charge
180 degrees; when there is half a wave distance in phase between two waves

32. What is the principal quantum number (n)?
7 always!!!
Electron shell number
When you have central atom with six ions on it
They do not differ

33. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
0 Hz because they are traveling side by side at the same speed
They are directly proportional
From peak to peak

34. What is weight equal to?
L = wavelength/2 so L= (wavelength)(2)
They are directly proportional
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Mg

35. If you have circuit elements in parallel what is the same across them?
It can absorb light that lets other electrons fill those orbitals
It will increase as well because they are directly related - only if pressure is kept constant
Voltage
The density of the water and volume of the lead object

36. What color is above 656 nm?
It can absorb light that lets other electrons fill those orbitals
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
A constant force on a mass causes it to have a constant acceleration
Red

37. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
T = 2pi/angular velocity; v/r
Mg

38. The total pressure of a solution is what? Give example.
[A]^a[B]^b
180 degrees; when there is half a wave distance in phase between two waves
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; the number of solute particles present

39. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Positron because this is known as positron decay/electron capture
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 lowest one
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

40. How do you find length of time something is in flight? How do you find distance it traveled?
Decreasing potential energy
T = (2h/g)^1/2; distance = vt
(+)
6.02 x 10^23 ions/mol

41. 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
-l to +l
The number of electrons emitted
The nucleus gains a proton and no neutrons

42. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
They must balance
A saturated solution in which the aqueous ions are in equilibrium with the solid
Mass number stays the same but the atomic number increases
Colligative: it depends on the number of solute molecules in a given volume of water

43. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
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
Attractive molecular forces acting between material surfaces in contact
[S][2S]^2 = 4S^3

44. 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
One mole of electric charge
Total internal reflection
Polar

45. What happens to a negatively charged particle put between two parallel plates?
When you have central atom with six ions on it
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Decreasing potential energy
It will increase as well because they are directly related - only if pressure is kept constant

46. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

47. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
They do not differ
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
A salt and water

48. What is the spin projection quantum number?
The volume of the ice cube or whatever it is
+/- 1/2
The number of electrons emitted
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

49. When a falling mass is at terminal speed - what is the power expended by the air resistance?
One that has more solute particles per liter of solution
P = F(v) = mg(v -terminal)
An odd number
It decreases; the work done by the gas in expanding decreases its internal energy

50. How do you find 'g' from Newton's law of gravity?
Colligative; the number of solute particles present
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Only temperature of the water bath
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2