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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. The electrons emitted from cathode are replaced with what?
Vertically; perpendicular to all surfaces
Faraday/electrons
Electrons from anode and battery
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

2. The probability of an X-ray emission event at a given wavelength is measured by what?
Constant to overcome the heat of fusion (solid to liquid state)
Its intensity in the spectrum
Momentum
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

3. What is the principal quantum number (n)?
Its intensity in the spectrum
The volume of the ice cube or whatever it is
The cross-sectional area through which the fluid flows
Electron shell number

4. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
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 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 element's mass number

5. Terminal voltage is provided to what?
External components of the circuit
Electron shell number
The path is longer on the inclined plane so it will take object longer to reach the bottom
When HIn is turned into In- - which is dependent upon the pKa of the indicator

6. Heat from friction comes from what?
P = IV
W = F(displacement)
Decreasing potential energy
-l to +l

7. What does the empirical formula show?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Red
The lowest whole number ratio of moles of each element in a mole of a cmpd
The buoyant force on it; W = mg = pVg

8. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Add them together

9. How do you find wavelength if you known distance from adjacent crests and troughs?
T = (2h/g)^1/2; distance = vt
Its twice that distance
Strong acid and strong base/ weak acid and weak base
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

10. Is the work done by air resistance - positive or negative?
Positive
Positron emission
Negative
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

11. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
Vertically; perpendicular to all surfaces
W = F(displacement)
Sp^3

12. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
No - it increases the speed at which the rxn reaches that equilibrium
Negative
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

13. Acetic acid is a ______ solvent
That of static friction; there is a net accelerating force on the block once it starts to slide
It can absorb light that lets other electrons fill those orbitals
The density of the water and volume of the lead object
Polar

14. When does red litmus paper turn blue?
They increase because you hear a lower frequency
In the presence of a base
That they are catalysts in the rxn because they react with the substrate and are reformed
3+

15. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
A salt and water
NO; reduction-oxidation
One mole of electric charge
Only temperature of the water bath

16. In Bohr model of atom when is energy emitted?
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
Mag and direction
Constant to overcome the heat of fusion (solid to liquid state)
When electron falls from high energy to low energy level

17. What is the equation for a period (T)? What is the equation for angular velocity?
Isolating an atom from minerals by decomposing the minerals with an electric current
T = 2pi/angular velocity; v/r
Positron emission
Ability to locate an event in space

18. What if the circuit elements are in series?
Half of the exponent
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
E = (kq)/r^2
The current is the same

19. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Zero
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)
Total internal reflection
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

20. A floating ice cube implies that it's weight is balanced by what?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The element's mass number
The buoyant force on it; W = mg = pVg
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

21. Hydrogen has what kind of standard oxidation or reduction potential?
When you have central atom with six ions on it
Zero
6.02 x 10^23 ions/mol
The element's mass number

22. The closer the spacing of the anode wire - the better one can specify what?
Colligative: it depends on the number of solute molecules in a given volume of water
It will be reduced the voltage produced by the resistor which means IR; E- IR
Where an event took place
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

23. What is one faraday equal to?
0 Hz because they are traveling side by side at the same speed
P = IV
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
One mole of electric charge

24. Can a catalyst shift equilibrium?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
No - it increases the speed at which the rxn reaches that equilibrium
400 to 700 nm
The particle's charge and the magnitude of the electric field

25. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Helium; 4
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

26. How do you find specific gravity of an object?
7 always!!!
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
400 to 700 nm

27. What do electrolytic techniques involve?
Mg
+/- 1/2
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
Isolating an atom from minerals by decomposing the minerals with an electric current

28. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
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
The lowest whole number ratio of moles of each element in a mole of a cmpd
V/m or N/C
It can absorb light that lets other electrons fill those orbitals

29. What kind of charge is on Al?
The number of electrons emitted
H = negative and S = positive
F = GMm/r^2
3+

30. What does spatial resolution refer to?
Yes - if the particle's trail is equidistant between two adjacent anodes
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The buoyant force on it; W = mg = pVg
Ability to locate an event in space

31. How do you find length of time something is in flight? How do you find distance it traveled?
Momentum
E = (kq)/r^2
A saturated solution in which the aqueous ions are in equilibrium with the solid
T = (2h/g)^1/2; distance = vt

32. What is sublimation?
Positive
Decreasing potential energy
Voltage
Going from solid to gas phase

33. The basicity constant Kb measures what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
From peak to peak
How strong a base is
6.02 x 10^23 ions/mol

34. How many mL is in one liter?
One that has more solute particles per liter of solution
L = wavelength/2 so L= (wavelength)(2)
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
1000

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

36. For a given flow rate - the speed of fluid flow is inversely proportional to what?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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
A constant force on a mass causes it to have a constant acceleration
The cross-sectional area through which the fluid flows

37. Neither N2 or O2 have a permanent what? What does this mean?
That they are catalysts in the rxn because they react with the substrate and are reformed
Decreasing potential energy
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

38. The square root of 10^anything is equal to what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
1000
Half of the exponent
Alkali metals = first column

39. What is the unit for Young's Modulus?
The volume of the ice cube or whatever it is
When all the external forces = zero
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Pascal (N*m^2)

40. How do you find 'g' from Newton's law of gravity?
Liquid displaced by that object
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Electron shell number
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

41. 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?

42. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
When all the external forces = zero
A constant force on a mass causes it to have a constant acceleration
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

43. Isotopes have diff number of ______ but same what?
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
Positive
Neutrons; atomic number
It can also equal 'mg'; the compressive strength of a substance

44. Strength of dispersion force increases with what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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

45. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
An odd number
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Voltage
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

46. What is the amt of energy that a frictional force generates?
When all the external forces = zero
Only temperature of the water bath
Force times the distance over which the force acts
That they are catalysts in the rxn because they react with the substrate and are reformed

47. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It decreases; the work done by the gas in expanding decreases its internal energy
[A]^a[B]^b
Yes - if the particle's trail is equidistant between two adjacent anodes

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

49. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Force times the distance over which the force acts
Negative

50. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
Where an event took place
400 to 700 nm
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant