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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 number of incident photons on the cathode affect what?
The number of electrons emitted
It's weight = mg; h
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)
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

2. What is the doppler equation for wavelength and frequency?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
They do not differ
Going from solid to gas phase
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

3. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
Negative
Total internal reflection
Colligative: it depends on the number of solute molecules in a given volume of water

4. What is the equation for work done?
Ability to locate an event in space
W = F(displacement)
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
Where an event took place

5. What are the units of an electric field?
V/m or N/C
It will increase as well because they are directly related - only if pressure is kept constant
The regular one
Force times the distance over which the force acts

6. In PV=nRT - if temp increases what will happen to volume?
Positive
Add them together
Mass number stays the same but the atomic number increases
It will increase as well because they are directly related - only if pressure is kept constant

7. When does red litmus paper turn blue?
Only temperature of the water bath
Going from solid to gas phase
In the presence of a base
H has a small atomic radius

8. A floating ice cube implies that it's weight is balanced by what?
That it is negative
Add them together
The buoyant force on it; W = mg = pVg
H = negative and S = positive

9. What is Avagadro's number regarding ions/mol?
The force along the board to the normal force
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
6.02 x 10^23 ions/mol
Neutrons; atomic number

10. What direction do gravity and bouyancy work? What direction does water pressure work?
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
Vertically; perpendicular to all surfaces
The nucleus gains a proton and no neutrons
Energy

11. 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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12. Mechanical waves in a medium fxn to transport what?
T = 2pi/angular velocity; v/r
Energy
Zero
The particle's charge and the magnitude of the electric field

13. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
T = (2h/g)^1/2; distance = vt
The element's mass number
The volume of the ice cube or whatever it is

14. Light can be carried along a distance within a transparent material by means of what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Total internal reflection
E = (kq)/r^2
Mv = mv

15. The boiling point of a solution is what type of property? Which means is depends only on what?
Yes - if the particle's trail is equidistant between two adjacent anodes
Colligative; the number of solute particles present
L = wavelength/2 so L= (wavelength)(2)
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

16. What is Newton's Universal Law of Gravitation?
0 Hz because they are traveling side by side at the same speed
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
F = GMm/r^2
When you have central atom with six ions on it

17. What is the relationship between P and n in PV=nRT?
P = F(v) = mg(v -terminal)
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
They are directly proportional
They increase because you hear a lower frequency

18. Melting occurs at what type of temperature? Why?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
When electron falls from high energy to low energy level
Constant to overcome the heat of fusion (solid to liquid state)
T = 2pi/angular velocity; v/r

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

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20. The coefficient of kinetic friction is always lower than what? Therefore what?
Total internal reflection
The force along the board to the normal force
That of static friction; there is a net accelerating force on the block once it starts to slide
Alkali metals = first column

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

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22. What happens to a negatively charged particle put between two parallel plates?
Strong acid and strong base/ weak acid and weak base
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
P = F(v) = mg(v -terminal)

23. Isotopes have diff number of ______ but same what?
A constant force on a mass causes it to have a constant acceleration
Density (gravitational constant) height
Neutrons; atomic number
The lowest one

24. The temperature of a metal will not increase above its melting point until what?
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Voltage
Liquid displaced by that object

25. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
At an equal distance behind it as the object is in front of the mirror
In the presence of a base
Total internal reflection

26. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Attractive molecular forces acting between material surfaces in contact
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
Gravity
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

27. The free energy change (G) must be negative when what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
They increase because you hear a lower frequency
The lowest one
H = negative and S = positive

28. When an element decreases its atomic number by one what is emitted?
Total internal reflection
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Positron because this is known as positron decay/electron capture

29. If you have circuit elements in parallel what is the same across them?
Going from solid to gas phase
Mg
Energy
Voltage

30. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
Alkali metals = first column
It will be reduced the voltage produced by the resistor which means IR; E- IR
Strong acid and strong base/ weak acid and weak base
7 always!!!

31. 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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32. The force on an electrical charge is what?
You look at what is being oxidized and reduced in the problem
Helium; 4
F =ma and F= qE
V/m or N/C

33. How do you find 'g' from Newton's law of gravity?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Colligative: it depends on the number of solute molecules in a given volume of water
T = 2pi/angular velocity; v/r
Accelerated by a higher voltage between the cathode and anode

34. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Its intensity in the spectrum
Momentum
You look at what is being oxidized and reduced in the problem
Positive

35. If both weight and bouyant force are dependent on g - that makes g independent of what?
Positron emission
Going from solid to gas phase
The volume of the ice cube or whatever it is
(density[p])(volume)

36. If asked which electron configuration of an element is most stable which one do you choose?
The regular one
They are directly proportional
T = (2h/g)^1/2; distance = vt
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

37. 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
Faraday/electrons
Positive
The force along the board to the normal force

38. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
-l to +l
The lowest whole number ratio of moles of each element in a mole of a cmpd
The number of electrons emitted
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

39. The freezing point of an aqueous solution is what kind of property? What does this mean?
L = wavelength/2 so L= (wavelength)(2)
Colligative: it depends on the number of solute molecules in a given volume of water
It has a positive oxidation potential so it is easily oxidized
When you have central atom with six ions on it

40. The total pressure of a solution is what? Give example.
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Ability to locate an event in space
The density of the water and volume of the lead object

41. Is the work done by air resistance - positive or negative?
Negative
Mag and direction
H = negative and S = positive
Cathode; anode

42. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
Mass number stays the same but the atomic number increases
The current is the same
T = (2h/g)^1/2; distance = vt

43. Friction is caused by what?
It decreases; the work done by the gas in expanding decreases its internal energy
In the presence of a base
Attractive molecular forces acting between material surfaces in contact
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

44. What is conserved in an inellastic collision?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Momentum
Positive
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

45. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Force times the distance over which the force acts
It will be reduced the voltage produced by the resistor which means IR; E- IR
At an equal distance behind it as the object is in front of the mirror
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

46. What is the equation for a period (T)? What is the equation for angular velocity?
Voltage
T = 2pi/angular velocity; v/r
That of static friction; there is a net accelerating force on the block once it starts to slide
Attractive molecular forces acting between material surfaces in contact

47. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Half of the exponent
Isolating an atom from minerals by decomposing the minerals with an electric current
F = GMm/r^2
They do not differ

48. If temperature arises during a mixture what can you conclude about the enthalpy?
Red
That it is negative
1000
Its twice that distance

49. The square root of 10^anything is equal to what?
Voltage
Half of the exponent
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

50. A plane mirror produces an image where?
They are directly proportional
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
At an equal distance behind it as the object is in front of the mirror
Going from solid to gas phase