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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. Friction is caused by what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
H = negative and S = positive
Attractive molecular forces acting between material surfaces in contact
The number of electrons emitted

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
Ability to locate an event in space
Density (gravitational constant) height
[A]^a[B]^b

3. 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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
T = 2pi/angular velocity; v/r
The volume of the ice cube or whatever it is

4. What are the units of an electric field?
3+
V/m or N/C
They do not differ
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

5. What is newton's second law?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The nucleus gains a proton and no neutrons
One that has more solute particles per liter of solution
A constant force on a mass causes it to have a constant acceleration

6. A nearsighted person has what type of focal length? Thus what do we do to correct this?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
One that has more solute particles per liter of solution
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
F =ma and F= qE

7. What kind of geometry is octahedral?
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
3+
0 Hz because they are traveling side by side at the same speed
When you have central atom with six ions on it

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

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9. How do you figure out the literature Ksp value of a compound?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
+/- 1/2
A saturated solution in which the aqueous ions are in equilibrium with the solid
H has a small atomic radius

10. Mechanical waves in a medium fxn to transport what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
When all the external forces = zero
The current is the same
Energy

11. The square root of 10^anything is equal to what?
Pascal (N*m^2)
Half of the exponent
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
The force along the board to the normal force

12. 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
No - it increases the speed at which the rxn reaches that equilibrium
At an equal distance behind it as the object is in front of the mirror
Going from solid to gas phase

13. If you are given density and volume how do you find mass?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Cathode; anode
(density[p])(volume)
3+

14. Kb is the equilibrium constant for what?
Cathode; anode
The reaction between the base and water
One that has more solute particles per liter of solution
That of static friction; there is a net accelerating force on the block once it starts to slide

15. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
Pascal (N*m^2)
The cross-sectional area through which the fluid flows
Attractive molecular forces acting between material surfaces in contact

16. In a rxn - how do you figure out which atom has the highest electron affinity?
Energy
NO; reduction-oxidation
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
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

17. 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?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
No - it increases the speed at which the rxn reaches that equilibrium
It has a positive oxidation potential so it is easily oxidized
They increase because you hear a lower frequency

18. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
W = F(displacement)
It can absorb light that lets other electrons fill those orbitals
It's weight = mg; the work would be the weight times the distance fell
They increase because you hear a lower frequency

19. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
External components of the circuit
A salt and water
Positive

20. 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
NO; reduction-oxidation
Yes - if the particle's trail is equidistant between two adjacent anodes
F = GMm/r^2

21. What is the equation for bouyant force? What is p?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
B = pVg; density
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
-l to +l

22. 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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
+/- 1/2

23. The temperature of a metal will not increase above its melting point until what?
You look at what is being oxidized and reduced in the problem
Energy
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
At an equal distance behind it as the object is in front of the mirror

24. 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
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
400 to 700 nm
-l to +l

25. What is the unit for Young's Modulus?
Positron because this is known as positron decay/electron capture
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
Its intensity in the spectrum

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?
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
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It can also equal 'mg'; the compressive strength of a substance
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

27. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
The element's mass number
They are directly proportional
B = pVg; density
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

28. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
Its twice that distance
They are directly proportional
In the presence of a base

29. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
When you have central atom with six ions on it
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
Attractive molecular forces acting between material surfaces in contact

30. What is the magnitude of the electric field produced by a point charge?
Neutrons; atomic number
E = (kq)/r^2
Where an event took place
In the presence of a base

31. A plane mirror produces an image where?
Add them together
At an equal distance behind it as the object is in front of the mirror
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Gravity

32. What is the magnetic quantum number?
NO; reduction-oxidation
-l to +l
H has a small atomic radius
The lowest whole number ratio of moles of each element in a mole of a cmpd

33. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Electrons from anode and battery
180 degrees; when there is half a wave distance in phase between two waves

34. What direction do gravity and bouyancy work? What direction does water pressure work?
Energy
Neutrons; atomic number
Vertically; perpendicular to all surfaces
From peak to peak

35. What is the equation for a period (T)? What is the equation for angular velocity?
The number of electrons emitted
T = 2pi/angular velocity; v/r
Momentum
The density of the water and volume of the lead object

36. For a given flow rate - the speed of fluid flow is inversely proportional to what?
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
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
The cross-sectional area through which the fluid flows
One mole of electric charge

37. What is weight equal to?
Mg
Vertically; perpendicular to all surfaces
In the presence of a base
-l to +l

38. Neither N2 or O2 have a permanent what? What does this mean?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

39. How do you find moles of a substance when you are given faradays and electrons?
The volume of the ice cube or whatever it is
Electrons from anode and battery
Faraday/electrons
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

40. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It decreases; the work done by the gas in expanding decreases its internal energy
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
Decreasing potential energy

41. What is the spin projection quantum number?
The force along the board to the normal force
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The density of the water and volume of the lead object
+/- 1/2

42. The electrons emitted from cathode are replaced with what?
Helium; 4
At an equal distance behind it as the object is in front of the mirror
Electrons from anode and battery
A salt and water

43. How do you find 'g' from Newton's law of gravity?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
No - it increases the speed at which the rxn reaches that equilibrium
Its momentum is zero because velocity is zero; zero because of conservation of momentum

44. The range of pH in which a color change takes place in a titration depends on what?
H has a small atomic radius
T = 2pi/angular velocity; v/r
When HIn is turned into In- - which is dependent upon the pKa of the indicator
One mole of electric charge

45. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Colligative; the number of solute particles present
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The reaction between the base and water
NO; reduction-oxidation

46. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Half of the exponent
Sp^3
V/m or N/C
You look at what is being oxidized and reduced in the problem

47. If both weight and bouyant force are dependent on g - that makes g independent of what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The volume of the ice cube or whatever it is
Accelerated by a higher voltage between the cathode and anode
One that has more solute particles per liter of solution

48. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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49. What type of acid and base would produce a pH closest to 7?
Polar
Electrons from anode and battery
Strong acid and strong base/ weak acid and weak base
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

50. Beta decay is the same as what?
Ability to locate an event in space
Vertically; perpendicular to all surfaces
Strong acid and strong base/ weak acid and weak base
Positron emission