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DSST Physical Sciences2

Subjects : dsst, science

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Answer 50 questions in 15 minutes.
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1. What is the equation for pressure?
0 Hz because they are traveling side by side at the same speed
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
Pascal (N*m^2)
Density (gravitational constant) height

2. In Bohr model of atom when is energy emitted?
Red
When electron falls from high energy to low energy level
400 to 700 nm
A constant force on a mass causes it to have a constant acceleration

3. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
V/m or N/C
Cathode; anode
Colligative; the number of solute particles present
The buoyant force on it; W = mg = pVg

4. A pendulum moves under the influence of what?
The buoyant force on it; W = mg = pVg
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
0 Hz because they are traveling side by side at the same speed
Gravity

5. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
V/m or N/C
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
When you have central atom with six ions on it

6. If temperature arises during a mixture what can you conclude about the enthalpy?
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
That it is negative
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It will be reduced the voltage produced by the resistor which means IR; E- IR

7. What is the equation for a period (T)? What is the equation for angular velocity?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
They are directly proportional
T = 2pi/angular velocity; v/r
One mole of electric charge

8. What kind of metals react violently with water?
Voltage
Alkali metals = first column
H = negative and S = positive
Electrons from anode and battery

9. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Vertically; perpendicular to all surfaces
Mv = mv
Positron emission

10. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Alkali metals = first column
Polar
That of static friction; there is a net accelerating force on the block once it starts to slide
Sp^3

11. What do electrolytic techniques involve?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
At an equal distance behind it as the object is in front of the mirror
Isolating an atom from minerals by decomposing the minerals with an electric current

12. Nuclear masses can be approximated from what?

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13. How would you find rate of rxn from pH 1 to pH2?
How strong a base is
They increase because you hear a lower frequency
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)
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

14. What is one faraday equal to?
T = (2h/g)^1/2; distance = vt
One mole of electric charge
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
From peak to peak

15. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
An odd number
(+)
[S][2S]^2 = 4S^3

16. 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 mass number stays the number but the atomic number decreases by one - usually resulting in another element
The volume of the ice cube or whatever it is
E = (kq)/r^2

17. How do you find specific gravity of an object?
Positron emission
Red
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
Force times the distance over which the force acts

18. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Neutrons; atomic number
It will increase as well because they are directly related - only if pressure is kept constant
Zero
NO; reduction-oxidation

19. What does spatial resolution refer to?
No - it increases the speed at which the rxn reaches that equilibrium
Decreasing potential energy
Ability to locate an event in space
Mass number stays the same but the atomic number increases

20. The probability of an X-ray emission event at a given wavelength is measured by what?
Zero
1000
V/m or N/C
Its intensity in the spectrum

21. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
V/m or N/C
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Ability to locate an event in space

22. Why are bonds between H and another atom shorter compared to most?
P = F(v) = mg(v -terminal)
They increase because you hear a lower frequency
H has a small atomic radius
Where an event took place

23. Friction is caused by what?
Positive
Energy
The lowest whole number ratio of moles of each element in a mole of a cmpd
Attractive molecular forces acting between material surfaces in contact

24. What type of acid and base would produce a pH closest to 7?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Strong acid and strong base/ weak acid and weak base

25. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Momentum
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
E = (kq)/r^2
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

26. If you are given density and volume how do you find mass?
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
(density[p])(volume)
It has a positive oxidation potential so it is easily oxidized
When HIn is turned into In- - which is dependent upon the pKa of the indicator

27. What is the equation for bouyant force? What is p?
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
B = pVg; density
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Isolating an atom from minerals by decomposing the minerals with an electric current

28. 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
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
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 amt than any of the other cmpds with a higher carbon to oxygen ratio

29. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
The particle's charge and the magnitude of the electric field
When all the external forces = zero
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
Liquid displaced by that object

30. What is the spin projection quantum number?
Helium; 4
7 always!!!
One that has more solute particles per liter of solution
+/- 1/2

31. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
That they are catalysts in the rxn because they react with the substrate and are reformed

32. What is the equation for work done?
W = F(displacement)
An odd number
They must balance
It will be reduced the voltage produced by the resistor which means IR; E- IR

33. What is the law of conservation of linear momentum?
Mg
(+)
One that has more solute particles per liter of solution
Mv = mv

34. The boiling point of a solution is what type of property? Which means is depends only on what?
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
Colligative; the number of solute particles present
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Only temperature of the water bath

35. What kind of geometry is octahedral?
Gravity
When you have central atom with six ions on it
A constant force on a mass causes it to have a constant acceleration
Cathode; anode

36. Beta decay is the same as what?
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
Positron emission
Colligative; the number of solute particles present

37. The free energy change (G) must be negative when what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
H = negative and S = positive
It will increase as well because they are directly related - only if pressure is kept constant
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

38. If both weight and bouyant force are dependent on g - that makes g independent of what?
T = (2h/g)^1/2; distance = vt
Its intensity in the spectrum
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 volume of the ice cube or whatever it is

39. In order to increase the kinetic energy of electrons - they must be what?
+/- 1/2
It decreases; the work done by the gas in expanding decreases its internal energy
Accelerated by a higher voltage between the cathode and anode
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

40. What if the circuit elements are in series?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
P = IV
The current is the same
Its momentum is zero because velocity is zero; zero because of conservation of momentum

41. Kb is the equilibrium constant for what?
It's weight = mg; h
No - it increases the speed at which the rxn reaches that equilibrium
The reaction between the base and water
The nucleus gains a proton and no neutrons

42. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
T = (2h/g)^1/2; distance = vt
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

43. The total pressure of a solution is what? Give example.
Strong acid and strong base/ weak acid and weak base
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
When HIn is turned into In- - which is dependent upon the pKa of the indicator

44. What is the magnetic quantum number?
From peak to peak
-l to +l
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
You look at what is being oxidized and reduced in the problem

45. What is a metathesis rxn?
Mag and direction
When all the external forces = zero
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
That of static friction; there is a net accelerating force on the block once it starts to slide

46. 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?
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
T = (2h/g)^1/2; distance = vt
7 always!!!
Add them together

47. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Polar
The nucleus gains a proton and no neutrons
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
-l to +l

48. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Vertically; perpendicular to all surfaces
Mass number stays the same but the atomic number increases

49. The freezing point of an aqueous solution is what kind of property? What does this mean?
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
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Neutrons; atomic number
Colligative: it depends on the number of solute molecules in a given volume of water

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

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DSST Physical Sciences2

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