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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.
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. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
The lowest one
At an equal distance behind it as the object is in front of the mirror
A salt and water

2. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Force times the distance over which the force acts
Voltage
That they are catalysts in the rxn because they react with the substrate and are reformed
The element's mass number

3. In radioactive decay the atomic number (A) and mass number (Z) must what?
The force along the board to the normal force
Its twice that distance
Energy
They must balance

4. The closer the spacing of the anode wire - the better one can specify what?
Positive
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
Where an event took place
Half of the exponent

5. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It's weight = mg; the work would be the weight times the distance fell
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
From peak to peak

6. What happens to a negatively charged particle put between two parallel plates?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
No - it increases the speed at which the rxn reaches that equilibrium
You look at what is being oxidized and reduced in the problem
Helium; 4

7. 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?
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
6.02 x 10^23 ions/mol

8. Beta decay is the same as what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Positron emission
A saturated solution in which the aqueous ions are in equilibrium with the solid
An odd number

9. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
B = pVg; density
No - it increases the speed at which the rxn reaches that equilibrium
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Faraday/electrons

10. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
P = F(v) = mg(v -terminal)
Mg
Sp^3
A saturated solution in which the aqueous ions are in equilibrium with the solid

11. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
[A]^a[B]^b
180 degrees; when there is half a wave distance in phase between two waves
They must balance
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

12. What are the three separate module for tensile stress - shear stress - and compression/expansion?

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13. Friction is caused by what?
H has a small atomic radius
Mag and direction
Attractive molecular forces acting between material surfaces in contact
Voltage

14. If both weight and bouyant force are dependent on g - that makes g independent of what?
They are directly proportional
It will be reduced the voltage produced by the resistor which means IR; E- IR
The volume of the ice cube or whatever it is
Sp^3

15. What is the equation for pressure?
[S][2S]^2 = 4S^3
Energy
Density (gravitational constant) height
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

16. How many mL is in one liter?
1000
One mole of electric charge
Colligative: it depends on the number of solute molecules in a given volume of water
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

17. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
T = 2pi/angular velocity; v/r
Sp^3
P = F(v) = mg(v -terminal)
It can absorb light that lets other electrons fill those orbitals

18. The number of incident photons on the cathode affect what?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Voltage
The number of electrons emitted
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

19. In order to increase the kinetic energy of electrons - they must be 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
Only temperature of the water bath
Accelerated by a higher voltage between the cathode and anode
Electrons from anode and battery

20. Why are bonds between H and another atom shorter compared to most?
H = negative and S = positive
The density of the water and volume of the lead object
H has a small atomic radius
7 always!!!

21. What is usually conserved over oscillation periods?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
From peak to peak
Energy
That of static friction; there is a net accelerating force on the block once it starts to slide

22. The phase difference corresponding to a half wave is what? When do you get destructive interference?
That it is negative
180 degrees; when there is half a wave distance in phase between two waves
Neutrons; atomic number
The force along the board to the normal force

23. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Mass number stays the same but the atomic number increases
That it is negative
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The lowest one

24. What kind of charge is on Al?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Its twice that distance
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
3+

25. Strength of dispersion force increases with what?
Half of the exponent
Isolating an atom from minerals by decomposing the minerals with an electric current
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Ease of polarizability of the molecule and thus increasing molecular weight of mass

26. 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?
Zero
It has a positive oxidation potential so it is easily oxidized
You look at what is being oxidized and reduced in the problem
Helium; 4

27. Is the work done by air resistance - positive or negative?
V/m or N/C
The lowest whole number ratio of moles of each element in a mole of a cmpd
Negative
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

28. A floating ice cube implies that it's weight is balanced by what?
The volume of the ice cube or whatever it is
The buoyant force on it; W = mg = pVg
W = F(displacement)
Electrons from anode and battery

29. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
W = F(displacement)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^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
Cathode; anode

30. What is the equation for a period (T)? What is the equation for angular velocity?
Colligative: it depends on the number of solute molecules in a given volume of water
The number of electrons emitted
T = 2pi/angular velocity; v/r
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

31. The concentration of OH and H30 ions are approximately equal at what pH?
Mag and direction
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Add them together
7 always!!!

32. 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?
1000
The density of the water and volume of the lead object
Sp^3
They do not differ

33. What is the law of conservation of linear momentum?
The force along the board to the normal force
At an equal distance behind it as the object is in front of the mirror
The regular one
Mv = mv

34. Can a catalyst shift equilibrium?
Force times the distance over which the force acts
Positron emission
No - it increases the speed at which the rxn reaches that equilibrium
L = wavelength/2 so L= (wavelength)(2)

35. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
No - it increases the speed at which the rxn reaches that equilibrium
A positron or electron; when atomic number goes up you know an electron has been emitted
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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

36. In order to guarantee a non-zero spin how many electrons are needed?
Negative
Density (gravitational constant) height
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
An odd number

37. How do you find 'g' from Newton's law of gravity?
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Only temperature of the water bath
The nucleus gains a proton and no neutrons

38. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
[S][2S]^2 = 4S^3
The path is longer on the inclined plane so it will take object longer to reach the bottom
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

39. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Attractive molecular forces acting between material surfaces in contact
A constant force on a mass causes it to have a constant acceleration
The cross-sectional area through which the fluid flows
The nucleus gains a proton and no neutrons

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

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41. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
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
Strong acid and strong base/ weak acid and weak base
Sp^3
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

42. What is sublimation?
Decreasing potential energy
Isolating an atom from minerals by decomposing the minerals with an electric current
180 degrees; when there is half a wave distance in phase between two waves
Going from solid to gas phase

43. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
It's weight = mg; h
Colligative: it depends on the number of solute molecules in a given volume of water
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
NO; reduction-oxidation

44. 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?
The buoyant force on it; W = mg = pVg
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
180 degrees; when there is half a wave distance in phase between two waves

45. Equivalent mass is what?
A positron or electron; when atomic number goes up you know an electron has been emitted
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
No - it increases the speed at which the rxn reaches that equilibrium
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

46. What is the spin projection quantum number?
Only temperature of the water bath
Decreasing potential energy
Polar
+/- 1/2

47. If asked which electron configuration of an element is most stable which one do you choose?
The number of electrons emitted
The regular one
Total internal reflection
Mag and direction

48. Mechanical waves in a medium fxn to transport 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
Energy
The lowest one
They do not differ

49. The basicity constant Kb measures what?
How strong a base is
Strong acid and strong base/ weak acid and weak base
+/- 1/2
Colligative; the number of solute particles present

50. 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?
Add them together
[A]^a[B]^b
F = GMm/r^2
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)