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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 the principal quantum number (n)?
Electron shell number
It's weight = mg; the work would be the weight times the distance fell
It will be reduced the voltage produced by the resistor which means IR; E- IR
They must balance

2. Mechanical waves in a medium fxn to transport what?
Density (gravitational constant) height
Liquid displaced by that object
Energy
It's weight = mg; h

3. If you have circuit elements in parallel what is the same across them?
No - it increases the speed at which the rxn reaches that equilibrium
[S][2S]^2 = 4S^3
Energy
Voltage

4. 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
Pascal (N*m^2)
From peak to peak
F =ma and F= qE

5. The boiling point of a solution is what type of property? Which means is depends only on what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Colligative; the number of solute particles present
Density (gravitational constant) height

6. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
Add them together
The lowest whole number ratio of moles of each element in a mole of a cmpd
The particle's charge and the magnitude of the electric field

7. What are the units of an electric field?
Only temperature of the water bath
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
0 Hz because they are traveling side by side at the same speed
V/m or N/C

8. 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
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
Positron emission
Where an event took place

9. How would you find rate of rxn from pH 1 to pH2?
T = 2pi/angular velocity; v/r
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
An odd number

10. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
Gravity
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Strong acid and strong base/ weak acid and weak base

11. 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
F =ma and F= qE
Strong acid and strong base/ weak acid and weak base

12. How many mL is in one liter?
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
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
1000
Alkali metals = first column

13. Why does light travel slower in an optically dense medium than through a vacuum?
Colligative: it depends on the number of solute molecules in a given volume of water
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Polar
T = 2pi/angular velocity; v/r

14. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Red
Helium; 4
H has a small atomic radius
Voltage

15. The visible spectrum ranges from ____ to _____
From peak to peak
Total internal reflection
That it is negative
400 to 700 nm

16. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Isolating an atom from minerals by decomposing the minerals with an electric current
Add them together

17. What is the spin projection quantum number?
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
T = 2pi/angular velocity; v/r
+/- 1/2
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

18. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Zero
No - it increases the speed at which the rxn reaches that equilibrium
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
Mass number stays the same but the atomic number increases

19. What is the law of conservation of linear momentum?
When you have central atom with six ions on it
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Mv = mv
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

20. How do you find 'g' from Newton's law of gravity?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
T = (2h/g)^1/2; distance = vt
A positron or electron; when atomic number goes up you know an electron has been emitted
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

21. Neither N2 or O2 have a permanent what? What does this mean?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Strong acid and strong base/ weak acid and weak base
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

22. A plane mirror produces an image where?
Positron because this is known as positron decay/electron capture
One that has more solute particles per liter of solution
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
At an equal distance behind it as the object is in front of the mirror

23. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Force times the distance over which the force acts
The reaction between the base and water
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Cathode; anode

24. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
You look at what is being oxidized and reduced in the problem
The lowest whole number ratio of moles of each element in a mole of a cmpd

25. The basicity constant Kb measures what?
They must balance
Energy
Going from solid to gas phase
How strong a base is

26. 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?
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The force along the board to the normal force
A positron or electron; when atomic number goes up you know an electron has been emitted

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

28. 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?
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 density of the water and volume of the lead object
It can also equal 'mg'; the compressive strength of a substance
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

29. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The volume of the ice cube or whatever it is
One that has more solute particles per liter of solution

30. What kind of geometry is octahedral?
V/m or N/C
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
External components of the circuit
When you have central atom with six ions on it

31. In radioactive decay the atomic number (A) and mass number (Z) must what?
[A]^a[B]^b
They must balance
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

32. When something is falling what is the force acting on it? Thus what would be the work done?

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33. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
Cathode; anode
The volume of the ice cube or whatever it is
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

34. Is the work done by air resistance - positive or negative?
Its intensity in the spectrum
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Negative
Half of the exponent

35. In general what is formed by an acid-base rxn?
Accelerated by a higher voltage between the cathode and anode
Going from solid to gas phase
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
A salt and water

36. 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?
0 Hz because they are traveling side by side at the same speed
Pascal (N*m^2)
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It's weight = mg; the work would be the weight times the distance fell

37. The freezing point of an aqueous solution is what kind of property? What does this mean?
When you have central atom with six ions on it
It can absorb light that lets other electrons fill those orbitals
H = negative and S = positive
Colligative: it depends on the number of solute molecules in a given volume of water

38. The force on an electrical charge is what?
400 to 700 nm
A saturated solution in which the aqueous ions are in equilibrium with the solid
That they are catalysts in the rxn because they react with the substrate and are reformed
F =ma and F= qE

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

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40. If temperature arises during a mixture what can you conclude about the enthalpy?
The lowest whole number ratio of moles of each element in a mole of a cmpd
That it is negative
Isolating an atom from minerals by decomposing the minerals with an electric current
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

41. What is the relationship between P and n in PV=nRT?
They are directly proportional
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
H has a small atomic radius
Faraday/electrons

42. What is a metathesis rxn?
The cross-sectional area through which the fluid flows
Liquid displaced by that object
Gravity
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

43. What kind of charge is on Al?
It decreases; the work done by the gas in expanding decreases its internal energy
3+
Pascal (N*m^2)
Its momentum is zero because velocity is zero; zero because of conservation of momentum

44. What is sublimation?
The reaction between the base and water
H = negative and S = positive
Going from solid to gas phase
No - it increases the speed at which the rxn reaches that equilibrium

45. What direction do gravity and bouyancy work? What direction does water pressure work?
The regular one
Half of the exponent
T = (2h/g)^1/2; distance = vt
Vertically; perpendicular to all surfaces

46. Heat from friction comes from what?
The nucleus gains a proton and no neutrons
Decreasing potential energy
Total internal reflection
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

47. What color is above 656 nm?
Red
+/- 1/2
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
0 Hz because they are traveling side by side at the same speed

48. What is the equation for pressure?
No - it increases the speed at which the rxn reaches that equilibrium
It's weight = mg; the work would be the weight times the distance fell
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Density (gravitational constant) height

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

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50. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
That it is negative
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