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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. In a rxn - how do you figure out which atom has the highest electron affinity?
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
Positron because this is known as positron decay/electron capture
The regular one
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

2. How do you find specific gravity of an object?
Attractive molecular forces acting between material surfaces in contact
Where an event took place
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

3. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
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
L = wavelength/2 so L= (wavelength)(2)
Sp^3

4. What energy conversion describes best what takes place in a battery-powered resistive circuit?
NO; reduction-oxidation
It can absorb light that lets other electrons fill those orbitals
Alkali metals = first column
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

5. Always remember that velocity has ____ and ____
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The regular one
Mag and direction
The buoyant force on it; W = mg = pVg

6. The square root of 10^anything is equal to what?
Yes - if the particle's trail is equidistant between two adjacent anodes
Only temperature of the water bath
F = GMm/r^2
Half of the exponent

7. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Its intensity in the spectrum
Helium; 4
Colligative; the number of solute particles present
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

8. The coefficient of static friction is the ratio of what?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
They do not differ
The force along the board to the normal force
Only temperature of the water bath

9. 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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
It's weight = mg; the work would be the weight times the distance fell
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

10. The closer the spacing of the anode wire - the better one can specify what?
You look at what is being oxidized and reduced in the problem
Where an event took place
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

11. What is the magnitude of the electric field produced by a point charge?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
They must balance
NO; reduction-oxidation
E = (kq)/r^2

12. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
They must balance
It will be reduced the voltage produced by the resistor which means IR; E- IR
Positron emission
It decreases; the work done by the gas in expanding decreases its internal energy

13. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
V/m or N/C
When electron falls from high energy to low energy level
[S][2S]^2 = 4S^3

14. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
NO; reduction-oxidation
Negative
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
That they are catalysts in the rxn because they react with the substrate and are reformed

15. Isotopes have diff number of ______ but same what?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Pascal (N*m^2)
Neutrons; atomic number
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

16. Acetic acid is a ______ solvent
Polar
Its twice that distance
180 degrees; when there is half a wave distance in phase between two waves
(+)

17. What is the principal quantum number (n)?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
NO; reduction-oxidation
Its twice that distance
Electron shell number

18. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
The buoyant force on it; W = mg = pVg
How strong a base is
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

19. What do electrolytic techniques involve?
A constant force on a mass causes it to have a constant acceleration
The particle's charge and the magnitude of the electric field
Vertically; perpendicular to all surfaces
Isolating an atom from minerals by decomposing the minerals with an electric current

20. In radioactive decay the atomic number (A) and mass number (Z) must what?
They must balance
It can also equal 'mg'; the compressive strength of a substance
The density of the water and volume of the lead object
F =ma and F= qE

21. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
1000
3+
F = GMm/r^2

22. Beta decay is the same as what?
Isolating an atom from minerals by decomposing the minerals with an electric current
+/- 1/2
Positron emission
Only temperature of the water bath

23. A plane mirror produces an image where?
The force along the board to the normal force
At an equal distance behind it as the object is in front of the mirror
They are directly proportional
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

24. 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
(density[p])(volume)
Its intensity in the spectrum
The regular one

25. Nuclear masses can be approximated from what?

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26. In PV=nRT - if temp increases what will happen to volume?
It can also equal 'mg'; the compressive strength of a substance
It will increase as well because they are directly related - only if pressure is kept constant
Colligative; the number of solute particles present
The volume of the ice cube or whatever it is

27. If temperature arises during a mixture what can you conclude about the enthalpy?
It will increase as well because they are directly related - only if pressure is kept constant
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That it is negative
T = (2h/g)^1/2; distance = vt

28. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Gravity
Polar
The cross-sectional area through which the fluid flows

29. The temperature of a metal will not increase above its melting point until what?
The cross-sectional area through which the fluid flows
It's weight = mg; the work would be the weight times the distance fell
When electron falls from high energy to low energy level
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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

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31. In Bohr model of atom when is energy emitted?
The path is longer on the inclined plane so it will take object longer to reach the bottom
When electron falls from high energy to low energy level
0 Hz because they are traveling side by side at the same speed
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

32. What is sublimation?
Electron shell number
No - it increases the speed at which the rxn reaches that equilibrium
NO; reduction-oxidation
Going from solid to gas phase

33. Mechanical waves in a medium fxn to transport what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
(+)
Energy
When electron falls from high energy to low energy level

34. A floating ice cube implies that it's weight is balanced by what?
6.02 x 10^23 ions/mol
The buoyant force on it; W = mg = pVg
T = (2h/g)^1/2; distance = vt
That they are catalysts in the rxn because they react with the substrate and are reformed

35. Beta decay is the emission of what? How do you know what it is the emission of?
Ability to locate an event in space
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
A positron or electron; when atomic number goes up you know an electron has been emitted
The cross-sectional area through which the fluid flows

36. The free energy change (G) must be negative when what?
Liquid displaced by that object
Positron emission
H = negative and S = positive
Its momentum is zero because velocity is zero; zero because of conservation of momentum

37. When is a body in translational equilibrium?
(+)
Electrons from anode and battery
When all the external forces = zero
Gravity

38. What is weight equal to?
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
Mg
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 current is the same

39. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
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
3+
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
They do not differ

40. What color is above 656 nm?
A saturated solution in which the aqueous ions are in equilibrium with the solid
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 reaction between the base and water
Red

41. In general what is formed by an acid-base rxn?
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
Mag and direction
A salt and water
How strong a base is

42. When an element decreases its atomic number by one what is emitted?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Momentum
They are directly proportional
Positron because this is known as positron decay/electron capture

43. The boiling point of a solution is what type of property? Which means is depends only on what?
It will increase as well because they are directly related - only if pressure is kept constant
Colligative; the number of solute particles present
[A]^a[B]^b
1000

44. Light can be carried along a distance within a transparent material by means of what?
The buoyant force on it; W = mg = pVg
Total internal reflection
In the presence of a base
Half of the exponent

45. The number of incident photons on the cathode affect what?
When electron falls from high energy to low energy level
The number of electrons emitted
400 to 700 nm
The current is the same

46. Strength of dispersion force increases with what?
Decreasing potential energy
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Zero
That it is negative

47. 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?

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48. How do you find 'g' from Newton's law of gravity?
V/m or N/C
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

49. What is the equation for work done?
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)
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
W = F(displacement)
When you have central atom with six ions on it

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?
Colligative; the number of solute particles present
0 Hz because they are traveling side by side at the same speed
That of static friction; there is a net accelerating force on the block once it starts to slide
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

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DSST Physical Sciences2

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