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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 happens to a negatively charged particle put between two parallel plates?
Attractive molecular forces acting between material surfaces in contact
A salt and water
7 always!!!
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

2. Is the work done by air resistance - positive or negative?
F =ma and F= qE
Negative
Mv = mv
That they are catalysts in the rxn because they react with the substrate and are reformed

3. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
The lowest one
7 always!!!
The nucleus gains a proton and no neutrons
Helium; 4

4. 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
When all the external forces = zero
Gravity
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

5. What is the relationship between P and n in PV=nRT?
400 to 700 nm
It can absorb light that lets other electrons fill those orbitals
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
They are directly proportional

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

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7. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
3+
Mass number stays the same but the atomic number increases
The buoyant force on it; W = mg = pVg

8. The free energy change (G) must be negative when what?
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
Its twice that distance
The number of electrons emitted
H = negative and S = positive

9. What is the magnetic quantum number?
Mass number stays the same but the atomic number increases
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
-l to +l
B = pVg; density

10. What is the equation for work done?
W = F(displacement)
Colligative: it depends on the number of solute molecules in a given volume of water
A constant force on a mass causes it to have a constant acceleration
A salt and water

11. The square root of 10^anything is equal to what?
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
Half of the exponent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
When electron falls from high energy to low energy level

12. 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?
When all the external forces = zero
0 Hz because they are traveling side by side at the same speed
External components of the circuit
Ease of polarizability of the molecule and thus increasing molecular weight of mass

13. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Ability to locate an event in space
E = (kq)/r^2
It decreases; the work done by the gas in expanding decreases its internal energy
Ease of polarizability of the molecule and thus increasing molecular weight of mass

14. Can a catalyst shift equilibrium?
It decreases; the work done by the gas in expanding decreases its internal energy
No - it increases the speed at which the rxn reaches that equilibrium
P = F(v) = mg(v -terminal)
That of static friction; there is a net accelerating force on the block once it starts to slide

15. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
400 to 700 nm
Liquid displaced by that object
Positive

16. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Attractive molecular forces acting between material surfaces in contact
NO; reduction-oxidation
Mg
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

17. In PV=nRT - if temp increases what will happen to volume?
Going from solid to gas phase
It will increase as well because they are directly related - only if pressure is kept constant
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
E = (kq)/r^2

18. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Vertically; perpendicular to all surfaces
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

19. What is usually conserved over oscillation periods?
It can also equal 'mg'; the compressive strength of a substance
Faraday/electrons
Mv = mv
Energy

20. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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
The lowest whole number ratio of moles of each element in a mole of a cmpd
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

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

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22. A plane mirror produces an image where?
One mole of electric charge
It decreases; the work done by the gas in expanding decreases its internal energy
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
At an equal distance behind it as the object is in front of the mirror

23. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
The force along the board to the normal force
1000
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
Mg

24. 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?
One mole of electric charge
How strong a base is
(+)
It has a positive oxidation potential so it is easily oxidized

25. What is a metathesis rxn?
Decreasing potential energy
Helium; 4
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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

26. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Polar
P = F(v) = mg(v -terminal)
Yes - if the particle's trail is equidistant between two adjacent anodes
The lowest one

27. When does red litmus paper turn blue?
The force along the board to the normal force
Density (gravitational constant) height
In the presence of a base
How strong a base is

28. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
A saturated solution in which the aqueous ions are in equilibrium with the solid
It will increase as well because they are directly related - only if pressure is kept constant
It's weight = mg; the work would be the weight times the distance fell
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

29. Acetic acid is a ______ solvent
Attractive molecular forces acting between material surfaces in contact
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Polar
When all the external forces = zero

30. How would you find rate of rxn from pH 1 to pH2?
E = (kq)/r^2
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Constant to overcome the heat of fusion (solid to liquid state)
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

31. In Bohr model of atom when is energy emitted?
F =ma and F= qE
Yes - if the particle's trail is equidistant between two adjacent anodes
When electron falls from high energy to low energy level
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

32. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
One mole of electric charge
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
P = F(v) = mg(v -terminal)

33. 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
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
From peak to peak
The lowest whole number ratio of moles of each element in a mole of a cmpd

34. The total pressure of a solution is what? Give example.
One mole of electric charge
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
It can also equal 'mg'; the compressive strength of a substance
The cross-sectional area through which the fluid flows

35. What is Avagadro's number regarding ions/mol?
P = F(v) = mg(v -terminal)
+/- 1/2
Faraday/electrons
6.02 x 10^23 ions/mol

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

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37. In radioactive decay the atomic number (A) and mass number (Z) must what?
They must balance
+/- 1/2
Pascal (N*m^2)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

38. What is one faraday equal to?
It's weight = mg; h
One mole of electric charge
Electron shell number
Only temperature of the water bath

39. 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?
[S][2S]^2 = 4S^3
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The particle's charge and the magnitude of the electric field

40. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Mag and direction
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It has a positive oxidation potential so it is easily oxidized
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

41. What is the equation for pressure?
It can also equal 'mg'; the compressive strength of a substance
It has a positive oxidation potential so it is easily oxidized
Gravity
Density (gravitational constant) height

42. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Isolating an atom from minerals by decomposing the minerals with an electric current
Decreasing potential energy
Cathode; anode

43. The boiling point of a solution is what type of property? Which means is depends only on what?
Alkali metals = first column
Colligative; the number of solute particles present
NO; reduction-oxidation
The regular one

44. What is sublimation?
Momentum
Going from solid to gas phase
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
NO; reduction-oxidation

45. What are the units of an electric field?
Ability to locate an event in space
V/m or N/C
Where an event took place
Polar

46. Why are bonds between H and another atom shorter compared to most?
It will increase as well because they are directly related - only if pressure is kept constant
Voltage
H has a small atomic radius
The buoyant force on it; W = mg = pVg

47. Why does light travel slower in an optically dense medium than through a vacuum?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
+/- 1/2
W = F(displacement)

48. What is the magnitude of the electric field produced by a point charge?
Positron emission
When electron falls from high energy to low energy level
V/m or N/C
E = (kq)/r^2

49. 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?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Its intensity in the spectrum
The density of the water and volume of the lead object
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

50. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Polar