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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 amt of energy that a frictional force generates?
Force times the distance over which the force acts
Cathode; anode
The lowest one
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

2. The total pressure of a solution is what? Give example.
E = (kq)/r^2
Attractive molecular forces acting between material surfaces in contact
T = 2pi/angular velocity; v/r
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

3. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Isolating an atom from minerals by decomposing the minerals with an electric current
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
They do not differ
1000

4. Beta decay is the same as what?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Its intensity in the spectrum
Positron emission

5. What is the unit for Young's Modulus?
Its twice that distance
The force along the board to the normal force
Total internal reflection
Pascal (N*m^2)

6. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
A constant force on a mass causes it to have a constant acceleration
Gravity
Positron because this is known as positron decay/electron capture

7. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Constant to overcome the heat of fusion (solid to liquid state)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)

8. What is Avagadro's number regarding ions/mol?
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
Electron shell number
Faraday/electrons
6.02 x 10^23 ions/mol

9. How do you figure out the literature Ksp value of a compound?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
A saturated solution in which the aqueous ions are in equilibrium with the solid
You look at what is being oxidized and reduced in the problem
Attractive molecular forces acting between material surfaces in contact

10. What is usually conserved over oscillation periods?
Energy
The reaction between the base and water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Positron emission

11. What is the doppler equation for wavelength and frequency?
The particle's charge and the magnitude of the electric field
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
T = (2h/g)^1/2; distance = vt
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

12. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
You look at what is being oxidized and reduced in the problem
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
It will increase as well because they are directly related - only if pressure is kept constant
P = IV

13. What do electrolytic techniques involve?
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
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
Density (gravitational constant) height
Isolating an atom from minerals by decomposing the minerals with an electric current

14. When is a body in translational equilibrium?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The lowest whole number ratio of moles of each element in a mole of a cmpd
When all the external forces = zero
At an equal distance behind it as the object is in front of the mirror

15. 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?
Its twice that distance
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)
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

16. 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?
Vertically; perpendicular to all surfaces
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
+/- 1/2
Its momentum is zero because velocity is zero; zero because of conservation of momentum

17. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Polar
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
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
180 degrees; when there is half a wave distance in phase between two waves

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

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

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20. What kind of metals react violently with water?
1000
Vertically; perpendicular to all surfaces
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Alkali metals = first column

21. 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?
Its intensity in the spectrum
Red
Faraday/electrons
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

22. What kind of geometry is octahedral?
When you have central atom with six ions on it
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
At an equal distance behind it as the object is in front of the mirror
Electron shell number

23. How do you find length of time something is in flight? How do you find distance it traveled?
Its twice that distance
T = (2h/g)^1/2; distance = vt
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Energy

24. How do you find specific gravity of an object?
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
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
Liquid displaced by that object
400 to 700 nm

25. What is weight equal to?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Mg
External components of the circuit
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

26. The number of incident photons on the cathode affect what?
The number of electrons emitted
1000
It can also equal 'mg'; the compressive strength of a substance
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

27. The electrons emitted from cathode are replaced with what?
One mole of electric charge
It will be reduced the voltage produced by the resistor which means IR; E- IR
Electrons from anode and battery
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

28. Strength of dispersion force increases with what?
Density (gravitational constant) height
F = GMm/r^2
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Momentum

29. Hydrogen has what kind of standard oxidation or reduction potential?
(+)
Polar
Zero
You look at what is being oxidized and reduced in the problem

30. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
W = F(displacement)
They must balance
Strong acid and strong base/ weak acid and weak base

31. What is one faraday equal to?
The reaction between the base and water
One mole of electric charge
That they are catalysts in the rxn because they react with the substrate and are reformed
Colligative; the number of solute particles present

32. Isotopes have diff number of ______ but same what?
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
Neutrons; atomic number
Mv = mv

33. In PV=nRT - if temp increases what will happen to volume?
Liquid displaced by that object
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 will increase as well because they are directly related - only if pressure is kept constant
6.02 x 10^23 ions/mol

34. 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
Zero
Gravity
From peak to peak

35. What is conserved in an inellastic collision?
Momentum
6.02 x 10^23 ions/mol
The element's mass number
1000

36. What is the spin projection quantum number?
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
The lowest one
6.02 x 10^23 ions/mol
+/- 1/2

37. The coefficient of kinetic friction is always lower than what? Therefore what?
180 degrees; when there is half a wave distance in phase between two waves
Strong acid and strong base/ weak acid and weak base
That of static friction; there is a net accelerating force on the block once it starts to slide
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. Beta decay is the emission of what? How do you know what it is the emission of?
F = GMm/r^2
A positron or electron; when atomic number goes up you know an electron has been emitted
It's weight = mg; h
Sp^3

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?
-l to +l
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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
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. The force on an electrical charge is what?
Gravity
F =ma and F= qE
In the presence of a base
The regular one

41. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
[A]^a[B]^b
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Sp^3

42. Why are bonds between H and another atom shorter compared to most?
Isolating an atom from minerals by decomposing the minerals with an electric current
H has a small atomic radius
6.02 x 10^23 ions/mol
Mag and direction

43. What is the magnitude of the electric field produced by a point charge?
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
V/m or N/C
E = (kq)/r^2
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)

44. A floating ice cube implies that it's weight is balanced by what?
Attractive molecular forces acting between material surfaces in contact
The buoyant force on it; W = mg = pVg
Zero
The nucleus gains a proton and no neutrons

45. The volume of an object is equal to water?
Vertically; perpendicular to all surfaces
V/m or N/C
Where an event took place
Liquid displaced by that object

46. 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?
A salt and water
Positron emission
Add them together
1000

47. What happens if an atom undergoes positron decay or electron capture?
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 lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
180 degrees; when there is half a wave distance in phase between two waves
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

48. The range of pH in which a color change takes place in a titration depends on what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
B = pVg; density
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Gravity

49. The free energy change (G) must be negative when what?
Mass number stays the same but the atomic number increases
H = negative and S = positive
Energy
Isolating an atom from minerals by decomposing the minerals with an electric current

50. Is the work done by air resistance - positive or negative?
Half of the exponent
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)
Negative
It decreases; the work done by the gas in expanding decreases its internal energy