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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.
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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. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
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
It's weight = mg; h
Add them together

2. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
When electron falls from high energy to low energy level
Mg
Density (gravitational constant) height

3. What is the formula for the power supplied by a battery to accelerate an electron beam?
Going from solid to gas phase
Alkali metals = first column
P = IV
It will be reduced the voltage produced by the resistor which means IR; E- IR

4. The Ksp for a substance of AaBb is what?
H has a small atomic radius
[A]^a[B]^b
A saturated solution in which the aqueous ions are in equilibrium with the solid
T = 2pi/angular velocity; v/r

5. How do you find moles of a substance when you are given faradays and electrons?
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
Faraday/electrons
In the presence of a base
Mag and direction

6. A plane mirror produces an image where?
At an equal distance behind it as the object is in front of the mirror
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Zero
When electron falls from high energy to low energy level

7. The coefficient of kinetic friction is always lower than what? Therefore what?
A saturated solution in which the aqueous ions are in equilibrium with the solid
When you have central atom with six ions on it
The lowest one
That of static friction; there is a net accelerating force on the block once it starts to slide

8. 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?
W = F(displacement)
Density (gravitational constant) height
The force along the board to the normal force
0 Hz because they are traveling side by side at the same speed

9. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The nucleus gains a proton and no neutrons
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The current is the same
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

10. What kind of charge is on Al?
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
Colligative; the number of solute particles present
3+
H has a small atomic radius

11. In general what is formed by an acid-base rxn?
A salt and water
The element's mass number
Add them together
When all the external forces = zero

12. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
They must balance
Alkali metals = first column
Where an event took place

13. What is the equation for work done?
-l to +l
Sp^3
W = F(displacement)
(density[p])(volume)

14. If temperature arises during a mixture what can you conclude about the enthalpy?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Attractive molecular forces acting between material surfaces in contact
The current is the same
That it is negative

15. Hydrogen has what kind of standard oxidation or reduction potential?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
P = IV
Zero
NO; reduction-oxidation

16. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
H = negative and S = positive
180 degrees; when there is half a wave distance in phase between two waves
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

17. 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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
NO; reduction-oxidation
A positron or electron; when atomic number goes up you know an electron has been emitted

18. In radioactive decay the atomic number (A) and mass number (Z) must what?
Add them together
One that has more solute particles per liter of solution
They must balance
Sp^3

19. What is one faraday equal to?
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 constant force on a mass causes it to have a constant acceleration
One mole of electric charge
Going from solid to gas phase

20. The total pressure of a solution is what? Give example.
B = pVg; density
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
NO; reduction-oxidation
Mag and direction

21. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The buoyant force on it; W = mg = pVg
T = (2h/g)^1/2; distance = vt
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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

22. The visible spectrum ranges from ____ to _____
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Mg
They increase because you hear a lower frequency
400 to 700 nm

23. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The lowest whole number ratio of moles of each element in a mole of a cmpd
You look at what is being oxidized and reduced in the problem

24. 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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25. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
It's weight = mg; the work would be the weight times the distance fell
The nucleus gains a proton and no neutrons
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The lowest whole number ratio of moles of each element in a mole of a cmpd

26. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Colligative: it depends on the number of solute molecules in a given volume of water
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Energy
You look at how many electrons are needed to reduce one cmpd and that number will be put in front of that cmpd and you do the same thing that's oxidized as well: review #38 on test #11

27. The square root of 10^anything is equal to what?
Total internal reflection
Half of the exponent
The regular one
Going from solid to gas phase

28. What is Avagadro's number regarding ions/mol?
The lowest whole number ratio of moles of each element in a mole of a cmpd
7 always!!!
Zero
6.02 x 10^23 ions/mol

29. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
Strong acid and strong base/ weak acid and weak base
Ability to locate an event in space
The density of the water and volume of the lead object

30. The temperature of a metal will not increase above its melting point until what?
Polar
It will be reduced the voltage produced by the resistor which means IR; E- IR
T = (2h/g)^1/2; distance = vt
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

31. What type of acid and base would produce a pH closest to 7?
The reaction between the base and water
Accelerated by a higher voltage between the cathode and anode
It can absorb light that lets other electrons fill those orbitals
Strong acid and strong base/ weak acid and weak base

32. What is sublimation?
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
Going from solid to gas phase
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

33. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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34. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
A saturated solution in which the aqueous ions are in equilibrium with the solid
400 to 700 nm
The path is longer on the inclined plane so it will take object longer to reach the bottom
Cathode; anode

35. How do you find wavelength if you known distance from adjacent crests and troughs?
+/- 1/2
Its twice that distance
Polar
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

36. In a rxn - how do you figure out which atom has the highest electron affinity?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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 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

37. When you are trying to calculate a galvanic cell's emf - what do you look at?
H = negative and S = positive
You look at what is being oxidized and reduced in the problem
They must balance
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

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

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39. 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?
Electron shell number
P = F(v) = mg(v -terminal)
At an equal distance behind it as the object is in front of the mirror
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

40. What direction do gravity and bouyancy work? What direction does water pressure work?
They increase because you hear a lower frequency
Vertically; perpendicular to all surfaces
Neutrons; atomic number
(+)

41. The basicity constant Kb measures what?
Electron shell number
Colligative; the number of solute particles present
How strong a base is
Liquid displaced by that object

42. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Mag and direction
NO; reduction-oxidation
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
+/- 1/2

43. Always remember that velocity has ____ and ____
An odd number
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
They increase because you hear a lower frequency
Mag and direction

44. The phase difference corresponding to a half wave is what? When do you get destructive interference?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It can also equal 'mg'; the compressive strength of a substance
180 degrees; when there is half a wave distance in phase between two waves
H has a small atomic radius

45. How do you balance redox rxns?

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46. Neither N2 or O2 have a permanent what? What does this mean?
When you have central atom with six ions on it
A positron or electron; when atomic number goes up you know an electron has been emitted
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

47. Mechanical waves in a medium fxn to transport what?
Energy
They increase because you hear a lower frequency
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Yes - if the particle's trail is equidistant between two adjacent anodes

48. What kind of metals react violently with water?
Alkali metals = first column
The density of the water and volume of the lead object
The path is longer on the inclined plane so it will take object longer to reach the bottom
The volume of the ice cube or whatever it is

49. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
They do not differ
The lowest one
7 always!!!

50. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
That it is negative
Polar
They increase because you hear a lower frequency
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect