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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 what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Mv = mv
A salt 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
It will increase as well because they are directly related - only if pressure is kept constant

2. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

3. Neither N2 or O2 have a permanent what? What does this mean?
When you have central atom with six ions on it
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Where an event took place
The path is longer on the inclined plane so it will take object longer to reach the bottom

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

5. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The path is longer on the inclined plane so it will take object longer to reach the bottom
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
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)
Energy

6. The free energy change (G) must be negative when what?
H = negative and S = positive
Zero
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

7. A pendulum moves under the influence of what?
It decreases; the work done by the gas in expanding decreases its internal energy
One that has more solute particles per liter of solution
Gravity
Electrons from anode and battery

8. What is the equation for work done?
Liquid displaced by that object
Electrons from anode and battery
W = F(displacement)
External components of the circuit

9. When you are trying to calculate a galvanic cell's emf - what do you look at?
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
You look at what is being oxidized and reduced in the problem
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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

10. What is the doppler equation for wavelength and frequency?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Isolating an atom from minerals by decomposing the minerals with an electric current
Its twice that distance
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

11. If you have circuit elements in parallel what is the same across them?
400 to 700 nm
The element's mass number
When all the external forces = zero
Voltage

12. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
T = 2pi/angular velocity; v/r
One that has more solute particles per liter of solution

13. What is the magnetic quantum number?
It's weight = mg; h
-l to +l
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
One that has more solute particles per liter of solution

14. Half-sine wave shape is what kind of wavelength with regards to length?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Constant to overcome the heat of fusion (solid to liquid state)
L = wavelength/2 so L= (wavelength)(2)
It can also equal 'mg'; the compressive strength of a substance

15. The closer the spacing of the anode wire - the better one can specify what?
The lowest one
NO; reduction-oxidation
They are directly proportional
Where an event took place

16. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Energy
It decreases; the work done by the gas in expanding decreases its internal energy
The nucleus gains a proton and no neutrons

17. 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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The force along the board to the normal force
The number of electrons emitted

18. In PV=nRT - if temp increases what will happen to volume?
T = 2pi/angular velocity; v/r
The regular one
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
It will increase as well because they are directly related - only if pressure is kept constant

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

20. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Attractive molecular forces acting between material surfaces in contact
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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

21. What is different between an inclined plane and free fall?
Cathode; anode
-l to +l
The force along the board to the normal force
The path is longer on the inclined plane so it will take object longer to reach the bottom

22. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
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
Total internal reflection
Strong acid and strong base/ weak acid and weak base

23. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
The cross-sectional area through which the fluid flows
E = (kq)/r^2
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Force times the distance over which the force acts

24. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
Neutrons; atomic number
(+)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

25. The square root of 10^anything is equal to what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Energy
Half of the exponent
Constant to overcome the heat of fusion (solid to liquid state)

26. What kind of geometry is octahedral?
Half of the exponent
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
The number of electrons emitted
When you have central atom with six ions on it

27. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Zero
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
180 degrees; when there is half a wave distance in phase between two waves

28. What does spatial resolution refer to?
Red
Where an event took place
Ability to locate an event in space
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

29. Always remember that velocity has ____ and ____
Mag and direction
[A]^a[B]^b
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
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

30. What is the formula for the power supplied by a battery to accelerate an electron beam?
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
Mv = mv
F =ma and F= qE
P = IV

31. In radioactive decay the atomic number (A) and mass number (Z) must what?
They must balance
[S][2S]^2 = 4S^3
That they are catalysts in the rxn because they react with the substrate and are reformed
In the presence of a base

32. Can a catalyst shift equilibrium?
Electrons from anode and battery
[A]^a[B]^b
The lowest one
No - it increases the speed at which the rxn reaches that equilibrium

33. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
It can also equal 'mg'; the compressive strength of a substance
1000
The nucleus gains a proton and no neutrons
It's weight = mg; h

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

35. Light can be carried along a distance within a transparent material by means of what?
Neutrons; atomic number
Total internal reflection
(density[p])(volume)
From peak to peak

36. What is the principal quantum number (n)?
Electron shell number
That of static friction; there is a net accelerating force on the block once it starts to slide
That it is negative
Ease of polarizability of the molecule and thus increasing molecular weight of mass

37. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
They do not differ
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
Voltage

38. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
A positron or electron; when atomic number goes up you know an electron has been emitted
Helium; 4
From peak to peak

39. For a given flow rate - the speed of fluid flow is inversely proportional to what?
T = (2h/g)^1/2; distance = vt
That they are catalysts in the rxn because they react with the substrate and are reformed
The cross-sectional area through which the fluid flows
180 degrees; when there is half a wave distance in phase between two waves

40. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That of static friction; there is a net accelerating force on the block once it starts to slide
Only temperature of the water bath
Isolating an atom from minerals by decomposing the minerals with an electric current

41. 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?
Accelerated by a higher voltage between the cathode and anode
Its momentum is zero because velocity is zero; zero because of conservation of momentum
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)
It has a positive oxidation potential so it is easily oxidized

42. The boiling point of a solution is what type of property? Which means is depends only on what?
Energy
The current is the same
Colligative; the number of solute particles present
The lowest whole number ratio of moles of each element in a mole of a cmpd

43. The number of incident photons on the cathode affect what?
P = IV
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
That it is negative
The number of electrons emitted

44. How do you balance redox rxns?

45. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
H = negative and S = positive
Momentum
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

46. The force on an electrical charge is what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
1000
F =ma and F= qE
Half of the exponent

47. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Liquid displaced by that object
Cathode; anode
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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

48. Acetic acid is a ______ solvent
Polar
B = pVg; density
0 Hz because they are traveling side by side at the same speed
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

49. The coefficient of static friction is the ratio of what?
An odd number
Vertically; perpendicular to all surfaces
A positron or electron; when atomic number goes up you know an electron has been emitted
The force along the board to the normal force

50. What is the equation for bouyant force? What is p?
B = pVg; density
Vertically; perpendicular to all surfaces
Electron shell number
The volume of the ice cube or whatever it is