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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 boiling point of a solution is what type of property? Which means is depends only on what?
Its twice that distance
It's weight = mg; the work would be the weight times the distance fell
A constant force on a mass causes it to have a constant acceleration
Colligative; the number of solute particles present

2. What is Avagadro's number regarding ions/mol?
Isolating an atom from minerals by decomposing the minerals with an electric current
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
6.02 x 10^23 ions/mol
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

3. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Cathode; anode
P = F(v) = mg(v -terminal)
Alkali metals = first column
A constant force on a mass causes it to have a constant acceleration

4. What kind of charge is on Al?
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)
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
3+

5. Half-sine wave shape is what kind of wavelength with regards to length?
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
Its intensity in the spectrum
Electrons from anode and battery
L = wavelength/2 so L= (wavelength)(2)

6. Strength of dispersion force increases with what?
Its intensity in the spectrum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Ease of polarizability of the molecule and thus increasing molecular weight of mass

7. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
E = (kq)/r^2
Only temperature of the water bath
One mole of electric charge
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

8. When does red litmus paper turn blue?
It will be reduced the voltage produced by the resistor which means IR; E- IR
In the presence of a base
It's weight = mg; the work would be the weight times the distance fell
It's weight = mg; h

9. What is the spin projection quantum number?
It can also equal 'mg'; the compressive strength of a substance
+/- 1/2
The volume of the ice cube or whatever it is
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

10. 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?
The nucleus gains a proton and no neutrons
No - it increases the speed at which the rxn reaches that equilibrium
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

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

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12. Equivalent mass is what?
[A]^a[B]^b
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
Yes - if the particle's trail is equidistant between two adjacent anodes
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

13. How do you find wavelength if you known distance from adjacent crests and troughs?
Polar
Its twice that distance
Electron shell number
NO; reduction-oxidation

14. What is the doppler equation for wavelength and frequency?
6.02 x 10^23 ions/mol
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The density of the water and volume of the lead object
F =ma and F= qE

15. Neither N2 or O2 have a permanent what? What does this mean?
Density (gravitational constant) height
An odd number
Only temperature of the water bath
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

16. How do you balance redox rxns?

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17. In general what is formed by an acid-base rxn?
Gravity
Constant to overcome the heat of fusion (solid to liquid state)
NO; reduction-oxidation
A salt and water

18. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Ability to locate an event in space
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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

19. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Going from solid to gas phase
They increase because you hear a lower frequency
Attractive molecular forces acting between material surfaces in contact
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

20. What is the equation for pressure?
Density (gravitational constant) height
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Mass number stays the same but the atomic number increases
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

21. How many mL is in one liter?
1000
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
The particle's charge and the magnitude of the electric field
Positron emission

22. The square root of 10^anything is equal to what?
Positron because this is known as positron decay/electron capture
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Negative
Half of the exponent

23. The coefficient of kinetic friction is always lower than what? Therefore what?
The density of the water and volume of the lead object
The regular one
That of static friction; there is a net accelerating force on the block once it starts to slide
[A]^a[B]^b

24. 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
They do not differ
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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

25. 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?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

26. 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?
Vertically; perpendicular to all surfaces
Its momentum is zero because velocity is zero; zero because of conservation of momentum
H has a small atomic radius
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

27. What if the circuit elements are in series?
T = (2h/g)^1/2; distance = vt
The current is the same
They increase because you hear a lower frequency
How strong a base is

28. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
Ability to locate an event in space
Yes - if the particle's trail is equidistant between two adjacent anodes
The current is the same

29. What direction do gravity and bouyancy work? What direction does water pressure work?
Neutrons; atomic number
That it is negative
Vertically; perpendicular to all surfaces
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

30. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Faraday/electrons
Strong acid and strong base/ weak acid and weak base

31. The force on an electrical charge is what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
[A]^a[B]^b
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
F =ma and F= qE

32. What is weight equal to?
Mag and direction
Polar
Mg
The path is longer on the inclined plane so it will take object longer to reach the bottom

33. How should the period of a waveform be calculated?
L = wavelength/2 so L= (wavelength)(2)
Negative
From peak to peak
T = 2pi/angular velocity; v/r

34. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Strong acid and strong base/ weak acid and weak base
Where an event took place
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

35. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
When all the external forces = zero
Vertically; perpendicular to all surfaces
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)
Positive

36. Can a catalyst shift equilibrium?
Colligative: it depends on the number of solute molecules in a given volume of water
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
No - it increases the speed at which the rxn reaches that equilibrium
Helium; 4

37. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
One mole of electric charge
NO; reduction-oxidation
Yes - if the particle's trail is equidistant between two adjacent anodes

38. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
6.02 x 10^23 ions/mol
They do not differ
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
-l to +l

39. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
E = (kq)/r^2
It's weight = mg; h
Sp^3

40. Mechanical waves in a medium fxn to transport what?
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
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
That of static friction; there is a net accelerating force on the block once it starts to slide
Energy

41. Isotopes have diff number of ______ but same what?
Electron shell number
Neutrons; atomic number
Red
Colligative; the number of solute particles present

42. What is the law of conservation of linear momentum?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
That they are catalysts in the rxn because they react with the substrate and are reformed
Polar
Mv = mv

43. What is one faraday equal to?
P = IV
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
That they are catalysts in the rxn because they react with the substrate and are reformed

44. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
When electron falls from high energy to low energy level
P = IV
Mass number stays the same but the atomic number increases
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

45. The concentration of OH and H30 ions are approximately equal at what pH?
Colligative; the number of solute particles present
7 always!!!
That of static friction; there is a net accelerating force on the block once it starts to slide
Accelerated by a higher voltage between the cathode and anode

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

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47. What type of acid and base would produce a pH closest to 7?
A saturated solution in which the aqueous ions are in equilibrium with the solid
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The regular one
Strong acid and strong base/ weak acid and weak base

48. In PV=nRT - if temp increases what will happen to volume?
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
It will increase as well because they are directly related - only if pressure is kept constant
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

49. Is the work done by air resistance - positive or negative?
NO; reduction-oxidation
Negative
Colligative; the number of solute particles present
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

50. What is the equation for work done?
That it is negative
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
W = F(displacement)
Gravity