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DSST Physical Sciences2

Subjects : dsst, science

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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. How do you find specific gravity of an object?
0 Hz because they are traveling side by side at the same speed
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
F = GMm/r^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

2. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
Density (gravitational constant) height
180 degrees; when there is half a wave distance in phase between two waves
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

3. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
In the presence of a base
Positron emission
Only temperature of the water bath
That they are catalysts in the rxn because they react with the substrate and are reformed

4. Friction is caused by what?
Positron emission
Isolating an atom from minerals by decomposing the minerals with an electric current
Attractive molecular forces acting between material surfaces in contact
A saturated solution in which the aqueous ions are in equilibrium with the solid

5. What is Avagadro's number regarding ions/mol?
It can absorb light that lets other electrons fill those orbitals
Mv = mv
6.02 x 10^23 ions/mol
The volume of the ice cube or whatever it is

6. For a given flow rate - the speed of fluid flow is inversely proportional to what?
In the presence of a base
They are directly proportional
The cross-sectional area through which the fluid flows
When electron falls from high energy to low energy level

7. What is the spin projection quantum number?
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
Positron because this is known as positron decay/electron capture
+/- 1/2
[S][2S]^2 = 4S^3

8. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
Red
P = F(v) = mg(v -terminal)
They must balance

9. How do you find 'g' from Newton's law of gravity?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Liquid displaced by that object
Total internal reflection

10. 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?
[S][2S]^2 = 4S^3
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
H has a small atomic radius
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

11. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Liquid displaced by that object
When you have central atom with six ions on it
F =ma and F= qE
One that has more solute particles per liter of solution

12. The basicity constant Kb measures what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
How strong a base is
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Yes - if the particle's trail is equidistant between two adjacent anodes

13. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Half of the exponent
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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

14. 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
In the presence of a base
It's weight = mg; the work would be the weight times the distance fell
That it is negative

15. Hydrogen has what kind of standard oxidation or reduction potential?
The nucleus gains a proton and no neutrons
An odd number
7 always!!!
Zero

16. What is the formula for the power supplied by a battery to accelerate an electron beam?
Zero
P = IV
How strong a base is
A positron or electron; when atomic number goes up you know an electron has been emitted

17. If both weight and bouyant force are dependent on g - that makes g independent of what?
Pascal (N*m^2)
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
1000
The volume of the ice cube or whatever it is

18. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
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
Positron because this is known as positron decay/electron capture
Liquid displaced by that object
T = 2pi/angular velocity; v/r

19. What kind of metals react violently with water?
It can absorb light that lets other electrons fill those orbitals
Force times the distance over which the force acts
Alkali metals = first column
Momentum

20. 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
Negative
It's weight = mg; h
Ability to locate an event in space

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

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22. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Only temperature of the water bath
Yes - if the particle's trail is equidistant between two adjacent anodes
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
External components of the circuit

23. What is one faraday equal to?
Colligative; the number of solute particles present
When electron falls from high energy to low energy level
Yes - if the particle's trail is equidistant between two adjacent anodes
One mole of electric charge

24. What is the principal quantum number (n)?
Electron shell number
The element's mass number
Isolating an atom from minerals by decomposing the minerals with an electric current
Mv = mv

25. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Half of the exponent
Energy
A positron or electron; when atomic number goes up you know an electron has been emitted
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

26. In general what is formed by an acid-base rxn?
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
A salt and water
At an equal distance behind it as the object is in front of the mirror
1000

27. What are the units of an electric field?
That of static friction; there is a net accelerating force on the block once it starts to slide
V/m or N/C
Energy
In the presence of a base

28. The total pressure of a solution is what? Give example.
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
Positron emission
Energy
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

29. 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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30. Why are bonds between H and another atom shorter compared to most?
That it is negative
H has a small atomic radius
Red
It's weight = mg; the work would be the weight times the distance fell

31. The temperature of a metal will not increase above its melting point until what?
Constant to overcome the heat of fusion (solid to liquid state)
Yes - if the particle's trail is equidistant between two adjacent anodes
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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

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33. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The regular one
Mv = mv
E = (kq)/r^2
The nucleus gains a proton and no neutrons

34. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
They do not differ
The nucleus gains a proton and no neutrons
3+
Yes - if the particle's trail is equidistant between two adjacent anodes

35. What is conserved in an inellastic collision?
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
Ability to locate an event in space
Momentum
1000

36. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
Only temperature of the water bath
Half of the exponent
Its intensity in the spectrum

37. 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
(density[p])(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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

38. The number of incident photons on the cathode affect what?
L = wavelength/2 so L= (wavelength)(2)
The number of electrons emitted
Polar
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

39. What does the empirical formula show?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The lowest whole number ratio of moles of each element in a mole of a cmpd
They do not differ
(density[p])(volume)

40. Kb is the equilibrium constant for what?
The particle's charge and the magnitude of the electric field
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Force times the distance over which the force acts
The reaction between the base and water

41. Always remember that velocity has ____ and ____
Electron shell number
When electron falls from high energy to low energy level
Mag and direction
Voltage

42. 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?
At an equal distance behind it as the object is in front of the mirror
Momentum
-l to +l
It will be reduced the voltage produced by the resistor which means IR; E- IR

43. A floating ice cube implies that it's weight is balanced by what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The buoyant force on it; W = mg = pVg
Pascal (N*m^2)

44. What is the magnetic quantum number?
-l to +l
It can absorb light that lets other electrons fill those orbitals
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

45. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
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
Positron emission
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

46. How do you find wavelength if you known distance from adjacent crests and troughs?
Voltage
W = F(displacement)
Negative
Its twice that distance

47. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The lowest one
0 Hz because they are traveling side by side at the same speed
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

48. The visible spectrum ranges from ____ to _____
It can absorb light that lets other electrons fill those orbitals
They are directly proportional
Electrons from anode and battery
400 to 700 nm

49. 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?
Pascal (N*m^2)
The regular one
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Force times the distance over which the force acts

50. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
Pascal (N*m^2)
In the presence of a base
P = IV

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DSST Physical Sciences2

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