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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. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Constant to overcome the heat of fusion (solid to liquid state)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

2. How do you find moles of a substance when you are given faradays and electrons?
Ability to locate an event in space
NO; reduction-oxidation
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
Faraday/electrons

3. What is the spin projection quantum number?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
It can absorb light that lets other electrons fill those orbitals
A constant force on a mass causes it to have a constant acceleration
+/- 1/2

4. 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
Energy
The buoyant force on it; W = mg = pVg
It has a positive oxidation potential so it is easily oxidized

5. The total pressure of a solution is what? Give example.
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
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
H = negative and S = positive
F = GMm/r^2

6. What if the circuit elements are in series?
Mv = mv
The current is the same
They are directly proportional
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

7. A plane mirror produces an image where?
The current is the same
H has a small atomic radius
The density of the water and volume of the lead object
At an equal distance behind it as the object is in front of the mirror

8. What are the units of an electric field?
Zero
V/m or N/C
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Half of the exponent

9. When is a body in translational equilibrium?
When all the external forces = zero
Voltage
Liquid displaced by that object
Red

10. Why are bonds between H and another atom shorter compared to most?
One that has more solute particles per liter of solution
H has a small atomic radius
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
It's weight = mg; h

11. What is the doppler equation for wavelength and frequency?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
The volume of the ice cube or whatever it is

12. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
It can absorb light that lets other electrons fill those orbitals
They do not differ
Isolating an atom from minerals by decomposing the minerals with an electric current
The lowest whole number ratio of moles of each element in a mole of a cmpd

13. 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
External components of the circuit
H has a small atomic radius
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

14. In order to guarantee a non-zero spin how many electrons are needed?
1000
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
NO; reduction-oxidation
An odd number

15. In PV=nRT - if temp increases what will happen to volume?
Force times the distance over which the force acts
The buoyant force on it; W = mg = pVg
Where an event took place
It will increase as well because they are directly related - only if pressure is kept constant

16. The force on an electrical charge is what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
F =ma and F= qE
They are directly proportional
It can also equal 'mg'; the compressive strength of a substance

17. 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?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
It will increase as well because they are directly related - only if pressure is kept constant

18. What is the equation for work done?
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
400 to 700 nm
W = F(displacement)

19. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
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
Neutrons; atomic number
When you have central atom with six ions on it
In the presence of a base

20. The visible spectrum ranges from ____ to _____
Going from solid to gas phase
400 to 700 nm
When you have central atom with six ions on it
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

21. What is the law of conservation of linear momentum?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The cross-sectional area through which the fluid flows
Mv = mv
A saturated solution in which the aqueous ions are in equilibrium with the solid

22. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cross-sectional area through which the fluid flows
Neutrons; atomic number
Density (gravitational constant) height
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

23. Can a charged particle be detected by two anodes?

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24. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Mv = mv
[S][2S]^2 = 4S^3
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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

25. If temperature arises during a mixture what can you conclude about the enthalpy?
Negative
It will increase as well because they are directly related - only if pressure is kept constant
Strong acid and strong base/ weak acid and weak base
That it is negative

26. 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?
The density of the water and volume of the lead object
W = F(displacement)
L = wavelength/2 so L= (wavelength)(2)
When electron falls from high energy to low energy level

27. In a rxn - how do you figure out which atom has the highest electron affinity?
Positive
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
They increase because you hear a lower frequency
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

28. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
The number of electrons emitted
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
Only temperature of the water bath
Half of the exponent

29. 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?
Force times the distance over which the force acts
Pascal (N*m^2)
Going from solid to gas phase
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

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

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31. Isotopes have diff number of ______ but same what?
Mass number stays the same but the atomic number increases
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Neutrons; atomic number

32. The probability of an X-ray emission event at a given wavelength is measured by what?
Positron emission
The nucleus gains a proton and no neutrons
Its intensity in the spectrum
A saturated solution in which the aqueous ions are in equilibrium with the solid

33. What is Newton's Universal Law of Gravitation?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It will increase as well because they are directly related - only if pressure is kept constant
Vertically; perpendicular to all surfaces
F = GMm/r^2

34. How should the period of a waveform be calculated?
T = (2h/g)^1/2; distance = vt
Ease of polarizability of the molecule and thus increasing molecular weight of mass
From peak to peak
P = IV

35. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Colligative; the number of solute particles present
A positron or electron; when atomic number goes up you know an electron has been emitted
Yes - if the particle's trail is equidistant between two adjacent anodes
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

36. What is a metathesis rxn?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Energy
Vertically; perpendicular to all surfaces
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

37. The coefficient of static friction is the ratio of 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
Going from solid to gas phase
The force along the board to the normal force
Colligative; the number of solute particles present

38. What is newton's second law?
They do not differ
F =ma and F= qE
Polar
A constant force on a mass causes it to have a constant acceleration

39. What is one faraday equal to?
180 degrees; when there is half a wave distance in phase between two waves
It will increase as well because they are directly related - only if pressure is kept constant
One mole of electric charge
Half of the exponent

40. Acetic acid is a ______ solvent
Gravity
Its twice that distance
Colligative; the number of solute particles present
Polar

41. What is the magnetic quantum number?
-l to +l
It will increase as well because they are directly related - only if pressure is kept constant
Colligative: it depends on the number of solute molecules in a given volume of water
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

42. 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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43. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
(density[p])(volume)
P = IV
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

44. The volume of an object is equal to water?
Liquid displaced by that object
F = GMm/r^2
E = (kq)/r^2
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

45. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Cathode; anode
7 always!!!

46. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The element's mass number
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

47. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
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
B = pVg; density
It decreases; the work done by the gas in expanding decreases its internal energy
Negative

48. In general what is formed by an acid-base rxn?
Negative
Going from solid to gas phase
A salt and water
No - it increases the speed at which the rxn reaches that equilibrium

49. Equivalent mass is what?
It can absorb light that lets other electrons fill those orbitals
They are directly proportional
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 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

50. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
(+)
A salt and water
-l to +l