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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. If you have circuit elements in parallel what is the same across them?
The reaction between the base and water
Voltage
[A]^a[B]^b
When all the external forces = zero

2. In PV=nRT - if temp increases what will happen to volume?
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
Positron emission
They are directly proportional
It will increase as well because they are directly related - only if pressure is kept constant

3. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
A constant force on a mass causes it to have a constant acceleration
They do not differ
Strong acid and strong base/ weak acid and weak base
Yes - if the particle's trail is equidistant between two adjacent anodes

4. The square root of 10^anything is equal to what?
Half of the exponent
Energy
Gravity
Pascal (N*m^2)

5. What is conserved in an inellastic collision?
Positron because this is known as positron decay/electron capture
(+)
Momentum
Yes - if the particle's trail is equidistant between two adjacent anodes

6. Light can be carried along a distance within a transparent material by means of what?
Colligative: it depends on the number of solute molecules in a given volume of water
Total internal reflection
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
The element's mass number

7. 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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8. 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
It can also equal 'mg'; the compressive strength of a substance
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
Yes - if the particle's trail is equidistant between two adjacent anodes

9. What is the equation for a period (T)? What is the equation for angular velocity?
H has a small atomic radius
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
T = 2pi/angular velocity; v/r

10. 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?
It decreases; the work done by the gas in expanding decreases its internal energy
Strong acid and strong base/ weak acid and weak base
The particle's charge and the magnitude of the electric field
It has a positive oxidation potential so it is easily oxidized

11. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
Yes - if the particle's trail is equidistant between two adjacent anodes
The number of electrons emitted

12. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Alkali metals = first column
Add them together
Polar

13. The concentration of OH and H30 ions are approximately equal at what pH?
The volume of the ice cube or whatever it is
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
7 always!!!
L = wavelength/2 so L= (wavelength)(2)

14. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
[A]^a[B]^b
It can absorb light that lets other electrons fill those orbitals
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Only temperature of the water bath

15. What if the circuit elements are in series?
That it is negative
One that has more solute particles per liter of solution
The current is the same
Accelerated by a higher voltage between the cathode and anode

16. Acetic acid is a ______ solvent
It will be reduced the voltage produced by the resistor which means IR; E- IR
Ability to locate an event in space
Polar
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

17. 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
3+
No - it increases the speed at which the rxn reaches that equilibrium
Zero

18. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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19. Mechanical waves in a medium fxn to transport what?
Mass number stays the same but the atomic number increases
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
Energy
The number of electrons emitted

20. A floating ice cube implies that it's weight is balanced by what?
Negative
You look at what is being oxidized and reduced in the problem
Going from solid to gas phase
The buoyant force on it; W = mg = pVg

21. What is Newton's Universal Law of Gravitation?
180 degrees; when there is half a wave distance in phase between two waves
The current is the same
H = negative and S = positive
F = GMm/r^2

22. What is the unit for Young's Modulus?
Pascal (N*m^2)
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
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
No - it increases the speed at which the rxn reaches that equilibrium

23. What is sublimation?
Add them together
7 always!!!
Going from solid to gas phase
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

24. What kind of geometry is octahedral?
Constant to overcome the heat of fusion (solid to liquid state)
Alkali metals = first column
When you have central atom with six ions on it
7 always!!!

25. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
It decreases; the work done by the gas in expanding decreases its internal energy
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Its momentum is zero because velocity is zero; zero because of conservation of momentum

26. How do you find moles of a substance when you are given faradays and electrons?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Faraday/electrons
V/m or N/C
It can absorb light that lets other electrons fill those orbitals

27. Half-sine wave shape is what kind of wavelength with regards to length?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Isolating an atom from minerals by decomposing the minerals with an electric current
L = wavelength/2 so L= (wavelength)(2)
A positron or electron; when atomic number goes up you know an electron has been emitted

28. When you are trying to find the buyoancy force of water on a lead object what density do you use in the equation B = pVg? what volume?
Mg
When you have central atom with six ions on it
The density of the water and volume of the lead object
Strong acid and strong base/ weak acid and weak base

29. Melting occurs at what type of temperature? Why?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Constant to overcome the heat of fusion (solid to liquid state)
Red
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

30. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
T = (2h/g)^1/2; distance = vt
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

31. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Red

32. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
The reaction between the base and water
The regular one
The volume of the ice cube or whatever it is

33. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It can also equal 'mg'; the compressive strength of a substance
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
It decreases; the work done by the gas in expanding decreases its internal energy
They are directly proportional

34. How would you find rate of rxn from pH 1 to pH2?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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
Gravity

35. In radioactive decay the atomic number (A) and mass number (Z) must what?
The element's mass number
They must balance
The current is the same
They are directly proportional

36. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
A positron or electron; when atomic number goes up you know an electron has been emitted
6.02 x 10^23 ions/mol
How strong a base is

37. In general what is formed by an acid-base rxn?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
A salt and water
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)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

38. In order to increase the kinetic energy of electrons - they must be what?
A salt and water
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Accelerated by a higher voltage between the cathode and anode
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

39. In Bohr model of atom when is energy emitted?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
0 Hz because they are traveling side by side at the same speed
When electron falls from high energy to low energy level
The number of electrons emitted

40. A nearsighted person has what type of focal length? Thus what do we do to correct this?
F =ma and F= qE
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
7 always!!!
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

41. What is the spin projection quantum number?
7 always!!!
In the presence of a base
+/- 1/2
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

42. What color is above 656 nm?
Red
A salt and water
Isolating an atom from minerals by decomposing the minerals with an electric current
No - it increases the speed at which the rxn reaches that equilibrium

43. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
H = negative and S = positive
Helium; 4
The nucleus gains a proton and no neutrons
A saturated solution in which the aqueous ions are in equilibrium with the solid

44. Heat from friction comes from what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Decreasing potential energy
It decreases; the work done by the gas in expanding decreases its internal energy
They are directly proportional

45. How do you find 'g' from Newton's law of gravity?
It's weight = mg; the work would be the weight times the distance fell
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The nucleus gains a proton and no neutrons
H = negative and S = positive

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

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47. What do electrolytic techniques involve?
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 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
L = wavelength/2 so L= (wavelength)(2)

48. Equivalent mass is what?
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
You look at what is being oxidized and reduced in the problem
Constant to overcome the heat of fusion (solid to liquid state)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

49. What happens to a negatively charged particle put between two parallel plates?
Strong acid and strong base/ weak acid and weak base
They are directly proportional
T = 2pi/angular velocity; v/r
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

50. Is the work done by air resistance - positive or negative?
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
Negative
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Light is absorbed and re-emitted by the atomic structure of the optically dense medium