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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The reaction between the base and water
V/m or N/C
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Yes - if the particle's trail is equidistant between two adjacent anodes

2. What energy conversion describes best what takes place in a battery-powered resistive circuit?
In the presence of a base
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
A saturated solution in which the aqueous ions are in equilibrium with the solid
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

3. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
A constant force on a mass causes it to have a constant acceleration
The nucleus gains a proton and no neutrons
Pascal (N*m^2)
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

4. What is the equation for pressure?
A positron or electron; when atomic number goes up you know an electron has been emitted
A saturated solution in which the aqueous ions are in equilibrium with the solid
Density (gravitational constant) height
6.02 x 10^23 ions/mol

5. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
The reaction between the base and water
You look at what is being oxidized and reduced in the problem
Voltage

6. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
P = IV
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
Negative

7. If asked which electron configuration of an element is most stable which one do you choose?
The buoyant force on it; W = mg = pVg
0 Hz because they are traveling side by side at the same speed
The regular one
The number of electrons emitted

8. What type of acid and base would produce a pH closest to 7?
Strong acid and strong base/ weak acid and weak base
The density of the water and volume of the lead object
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
The number of electrons emitted

9. 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?
Alkali metals = first column
Its momentum is zero because velocity is zero; zero because of conservation of momentum
At an equal distance behind it as the object is in front of the mirror
When HIn is turned into In- - which is dependent upon the pKa of the indicator

10. What is the equation for work done?
W = F(displacement)
Red
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The lowest one

11. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Accelerated by a higher voltage between the cathode and anode
The buoyant force on it; W = mg = pVg
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
180 degrees; when there is half a wave distance in phase between two waves

12. 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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13. Strength of dispersion force increases with what?
Decreasing potential energy
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Sp^3
It decreases; the work done by the gas in expanding decreases its internal energy

14. What kind of metals react violently with water?
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Alkali metals = first column
Its twice that distance

15. What kind of geometry is octahedral?
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
Electron shell number
When you have central atom with six ions on it
H has a small atomic radius

16. 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?
The regular one
It has a positive oxidation potential so it is easily oxidized
The lowest whole number ratio of moles of each element in a mole of a cmpd
Liquid displaced by that object

17. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Going from solid to gas phase
They do not differ
T = 2pi/angular velocity; v/r

18. What kind of charge is on Al?
3+
F =ma and F= qE
The regular one
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

19. Neither N2 or O2 have a permanent what? What does this mean?
Positive
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 density of the water and volume of the lead object
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

20. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
That it is negative
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
Positron because this is known as positron decay/electron capture

21. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
It can absorb light that lets other electrons fill those orbitals
That of static friction; there is a net accelerating force on the block once it starts to slide
Sp^3
Colligative: it depends on the number of solute molecules in a given volume of water

22. If temperature arises during a mixture what can you conclude about the enthalpy?
(density[p])(volume)
180 degrees; when there is half a wave distance in phase between two waves
It decreases; the work done by the gas in expanding decreases its internal energy
That it is negative

23. Beta decay is the same as what?
How strong a base is
Positron emission
V/m or N/C
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

24. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
That of static friction; there is a net accelerating force on the block once it starts to slide
Helium; 4
Constant to overcome the heat of fusion (solid to liquid state)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

25. Isotopes have diff number of ______ but same what?
0 Hz because they are traveling side by side at the same speed
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
Positron because this is known as positron decay/electron capture
Neutrons; atomic number

26. How do you find moles of a substance when you are given faradays and electrons?
That they are catalysts in the rxn because they react with the substrate and are reformed
No - it increases the speed at which the rxn reaches that equilibrium
Faraday/electrons
Neutrons; atomic number

27. What is the unit for Young's Modulus?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Electrons from anode and battery
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
Pascal (N*m^2)

28. A floating ice cube implies that it's weight is balanced by what?
Constant to overcome the heat of fusion (solid to liquid state)
The buoyant force on it; W = mg = pVg
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Its momentum is zero because velocity is zero; zero because of conservation of momentum

29. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
Zero
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Neutrons; atomic number

30. If you have circuit elements in parallel what is the same across them?
Voltage
You look at what is being oxidized and reduced in the problem
It has a positive oxidation potential so it is easily oxidized
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

31. How would you find rate of rxn from pH 1 to pH2?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
They do not differ
You look at what is being oxidized and reduced in the problem
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

32. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
L = wavelength/2 so L= (wavelength)(2)
They increase because you hear a lower frequency
H = negative and S = positive

33. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It has a positive oxidation potential so it is easily oxidized

34. In general what is formed by an acid-base rxn?
A salt and water
Density (gravitational constant) height
From peak to peak
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

35. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Going from solid to gas phase
The element's mass number
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
They do not differ

36. The force on an electrical charge is what?
W = F(displacement)
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
F =ma and F= qE
Mv = mv

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

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38. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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39. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
Energy
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)

40. What is the amt of energy that a frictional force generates?
When electron falls from high energy to low energy level
Force times the distance over which the force acts
Decreasing potential energy
That they are catalysts in the rxn because they react with the substrate and are reformed

41. When you are trying to calculate a galvanic cell's emf - what do you look at?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The reaction between the base and water
You look at what is being oxidized and reduced in the problem
P = F(v) = mg(v -terminal)

42. What is the relationship between P and n in PV=nRT?
They are directly proportional
It will be reduced the voltage produced by the resistor which means IR; E- IR
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 reaction between the base and water

43. What is different between an inclined plane and free fall?
Its intensity in the spectrum
Voltage
The path is longer on the inclined plane so it will take object longer to reach the bottom
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

44. Melting occurs at what type of temperature? Why?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Constant to overcome the heat of fusion (solid to liquid state)
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

45. When an element decreases its atomic number by one what is emitted?
Half of the exponent
Where an event took place
Positron because this is known as positron decay/electron capture
Energy

46. 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?
H has a small atomic radius
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
How strong a base is
The force along the board to the normal force

47. What direction do gravity and bouyancy work? What direction does water pressure work?
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
Vertically; perpendicular to all surfaces
L = wavelength/2 so L= (wavelength)(2)
Mg

48. In order to guarantee a non-zero spin how many electrons are needed?
The path is longer on the inclined plane so it will take object longer to reach the bottom
An odd number
In the presence of a base
The particle's charge and the magnitude of the electric field

49. When does red litmus paper turn blue?
In the presence of a base
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Total internal reflection
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

50. What if the circuit elements are in series?
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
Energy
It can also equal 'mg'; the compressive strength of a substance
The current is the same