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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. How do you balance redox rxns?

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2. Acetic acid is a ______ solvent
Polar
It will be reduced the voltage produced by the resistor which means IR; E- IR
[S][2S]^2 = 4S^3
The number of electrons emitted

3. The coefficient of static friction is the ratio of what?
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
The force along the board to the normal force
Polar
W = F(displacement)

4. What is the amt of energy that a frictional force generates?
Positron because this is known as positron decay/electron capture
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Force times the distance over which the force acts
That it is negative

5. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
The number of electrons emitted
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
How strong a base is
That they are catalysts in the rxn because they react with the substrate and are reformed

6. What happens if an atom undergoes positron decay or electron capture?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
F = GMm/r^2
A saturated solution in which the aqueous ions are in equilibrium with the solid
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

7. 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?
From peak to peak
It has a positive oxidation potential so it is easily oxidized
Red
The current is the same

8. How do you find length of time something is in flight? How do you find distance it traveled?
Cathode; anode
The lowest whole number ratio of moles of each element in a mole of a cmpd
NO; reduction-oxidation
T = (2h/g)^1/2; distance = vt

9. What color is above 656 nm?
Red
[A]^a[B]^b
It decreases; the work done by the gas in expanding decreases its internal energy
Total internal reflection

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

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11. 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?
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 look at what is being oxidized and reduced in the problem
It will be reduced the voltage produced by the resistor which means IR; E- IR
That it is negative

12. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It can also equal 'mg'; the compressive strength of a substance
Only temperature of the water bath
It's weight = mg; the work would be the weight times the distance fell

13. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
(+)
Mv = mv
[A]^a[B]^b

14. Beta decay is the same as what?
When electron falls from high energy to low energy level
The force along the board to the normal force
Momentum
Positron emission

15. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
The lowest whole number ratio of moles of each element in a mole of a cmpd
The lowest one
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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

16. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
Helium; 4
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
L = wavelength/2 so L= (wavelength)(2)

17. What is the equation for bouyant force? What is p?
The nucleus gains a proton and no neutrons
B = pVg; density
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
H = negative and S = positive

18. What kind of metals react violently with water?
400 to 700 nm
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Alkali metals = first column

19. The freezing point of an aqueous solution is what kind of property? What does this mean?
Strong acid and strong base/ weak acid and weak base
Helium; 4
Colligative: it depends on the number of solute molecules in a given volume of water
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

20. How would you find rate of rxn from pH 1 to pH2?
It will increase as well because they are directly related - only if pressure is kept constant
No - it increases the speed at which the rxn reaches that equilibrium
1000
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

21. What is different between an inclined plane and free fall?
A constant force on a mass causes it to have a constant acceleration
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The path is longer on the inclined plane so it will take object longer to reach the bottom
The lowest one

22. What is the principal quantum number (n)?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Electron shell number
Negative
Its momentum is zero because velocity is zero; zero because of conservation of momentum

23. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
Positron emission
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

24. The closer the spacing of the anode wire - the better one can specify what?
Faraday/electrons
Negative
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)
Where an event took place

25. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
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
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
When electron falls from high energy to low energy level

26. 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
-l to +l
Zero
P = F(v) = mg(v -terminal)

27. How do you find moles of a substance when you are given faradays and electrons?
The nucleus gains a proton and no neutrons
Faraday/electrons
Strong acid and strong base/ weak acid and weak base
Force times the distance over which the force acts

28. What is weight equal to?
Gravity
Mg
Mv = mv
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

29. Terminal voltage is provided to what?
0 Hz because they are traveling side by side at the same speed
External components of the circuit
Attractive molecular forces acting between material surfaces in contact
The lowest whole number ratio of moles of each element in a mole of a cmpd

30. 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?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
They increase because you hear a lower frequency
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

31. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
You look at what is being oxidized and reduced in the problem
One that has more solute particles per liter of solution
Vertically; perpendicular to all surfaces
-l to +l

32. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
400 to 700 nm
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

33. Why are bonds between H and another atom shorter compared to most?
It's weight = mg; h
Negative
H has a small atomic radius
Sp^3

34. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Decreasing potential energy
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Helium; 4

35. Melting occurs at what type of temperature? Why?
Negative
Attractive molecular forces acting between material surfaces in contact
3+
Constant to overcome the heat of fusion (solid to liquid state)

36. A nearsighted person has what type of focal length? Thus what do we do to correct this?
The buoyant force on it; W = mg = pVg
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
(+)

37. 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
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The reaction between the base and water
Momentum

38. What is the spin projection quantum number?
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
+/- 1/2
Alkali metals = first column
The regular one

39. What happens to a negatively charged particle put between two parallel plates?
Yes - if the particle's trail is equidistant between two adjacent anodes
F =ma and F= qE
It can also equal 'mg'; the compressive strength of a substance
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

40. In a rxn - how do you figure out which atom has the highest electron affinity?
A positron or electron; when atomic number goes up you know an electron has been emitted
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The lowest one
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

41. Mechanical waves in a medium fxn to transport what?
T = 2pi/angular velocity; v/r
Energy
A constant force on a mass causes it to have a constant acceleration
Where an event took place

42. When you are trying to calculate a galvanic cell's emf - what do you look at?
When you have central atom with six ions on it
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
You look at what is being oxidized and reduced in the problem
Attractive molecular forces acting between material surfaces in contact

43. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
That they are catalysts in the rxn because they react with the substrate and are reformed
They increase because you hear a lower frequency
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Neutrons; atomic number

44. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
They must balance
Force times the distance over which the force acts
T = 2pi/angular velocity; v/r
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

45. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The reaction between the base and water
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

46. What do electrolytic techniques involve?
The current is the same
Isolating an atom from minerals by decomposing the minerals with an electric current
Alkali metals = first column
Where an event took place

47. What is the equation for pressure?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Density (gravitational constant) height
The nucleus gains a proton and no neutrons
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

48. What would the force be of a block on a pulley? What would be its displacement?

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49. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
They increase because you hear a lower frequency
(+)
From peak to peak

50. Heat from friction comes from what?
Decreasing potential energy
Add them together
The current is the same
An odd number