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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. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
Mag and direction
How strong a base is
That of static friction; there is a net accelerating force on the block once it starts to slide

2. The range of pH in which a color change takes place in a titration 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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Alkali metals = first column
Yes - if the particle's trail is equidistant between two adjacent anodes

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?
The reaction between the base and water
It will be reduced the voltage produced by the resistor which means IR; E- IR
Strong acid and strong base/ weak acid and weak base
They increase because you hear a lower frequency

4. What is the equation for work done?
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
The buoyant force on it; W = mg = pVg
Alkali metals = first column
W = F(displacement)

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

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6. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Half of the exponent
The lowest whole number ratio of moles of each element in a mole of a cmpd

7. 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
Half of the exponent
Neutrons; atomic number
The force along the board to the normal force

8. What is newton's second law?
A constant force on a mass causes it to have a constant acceleration
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
P = F(v) = mg(v -terminal)

9. 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 you have central atom with six ions on it
0 Hz because they are traveling side by side at the same speed
That of static friction; there is a net accelerating force on the block once it starts to slide
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

10. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
That it is negative
When you have central atom with six ions on it
Sp^3

11. When does red litmus paper turn blue?
The force along the board to the normal force
In the presence of a base
3+
The current is the same

12. What is Avagadro's number regarding ions/mol?
It decreases; the work done by the gas in expanding decreases its internal energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It has a positive oxidation potential so it is easily oxidized
6.02 x 10^23 ions/mol

13. Hydrogen has what kind of standard oxidation or reduction potential?
Density (gravitational constant) height
Zero
Yes - if the particle's trail is equidistant between two adjacent anodes
Attractive molecular forces acting between material surfaces in contact

14. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The force along the board to the normal force
6.02 x 10^23 ions/mol
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)

15. The electrons emitted from cathode are replaced with what?
Electrons from anode and battery
Mg
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Yes - if the particle's trail is equidistant between two adjacent anodes

16. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
The lowest one
Mass number stays the same but the atomic number increases
When HIn is turned into In- - which is dependent upon the pKa of the indicator
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

17. The closer the spacing of the anode wire - the better one can specify what?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The reaction between the base and water
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
Where an event took place

18. How do you find wavelength if you known distance from adjacent crests and troughs?
Energy
Its twice that distance
The cross-sectional area through which the fluid flows
0 Hz because they are traveling side by side at the same speed

19. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Momentum
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
How strong a base is

20. What is the magnetic quantum number?
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
-l to +l
Zero
You look at what is being oxidized and reduced in the problem

21. Is the work done by air resistance - positive or negative?
The number of electrons emitted
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Its twice that distance
Negative

22. Beta decay is the same as 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
External components of the circuit
Positron emission
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

23. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Cathode; anode
Positive
They do not differ

24. What happens if an atom undergoes positron decay or electron capture?
NO; reduction-oxidation
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Positron emission
One mole of electric charge

25. The force on an electrical charge is what?
F =ma and F= qE
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
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
Ability to locate an event in space

26. Neither N2 or O2 have a permanent what? What does this mean?
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
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

27. The temperature of a metal will not increase above its melting point until what?
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
E = (kq)/r^2
Helium; 4
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

28. What is usually conserved over oscillation periods?
Its twice that distance
Energy
Alkali metals = first column
Yes - if the particle's trail is equidistant between two adjacent anodes

29. Mechanical waves in a medium fxn to transport what?
Energy
It's weight = mg; the work would be the weight times the distance fell
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Vertically; perpendicular to all surfaces

30. What is conserved in an inellastic collision?
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
One mole of electric charge
Momentum
[S][2S]^2 = 4S^3

31. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
Density (gravitational constant) height
3+
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
Faraday/electrons

32. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Going from solid to gas phase
6.02 x 10^23 ions/mol
That they are catalysts in the rxn because they react with the substrate and are reformed
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

33. What is the spin projection quantum number?
400 to 700 nm
+/- 1/2
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
(density[p])(volume)

34. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
T = 2pi/angular velocity; v/r
Positron because this is known as positron decay/electron capture
They increase because you hear a lower frequency

35. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
Its twice that distance
When electron falls from high energy to low energy level
Sp^3

36. Heat from friction comes from what?
The buoyant force on it; W = mg = pVg
You look at what is being oxidized and reduced in the problem
Decreasing potential energy
From peak to peak

37. The coefficient of static friction is the ratio of what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Mg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The force along the board to the normal force

38. In PV=nRT - if temp increases what will happen to volume?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
It will increase as well because they are directly related - only if pressure is kept constant
400 to 700 nm
T = (2h/g)^1/2; distance = vt

39. 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?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Yes - if the particle's trail is equidistant between two adjacent anodes
Electron shell number
It has a positive oxidation potential so it is easily oxidized

40. Strength of dispersion force increases with what?
When electron falls from high energy to low energy level
Faraday/electrons
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

41. When a falling mass is at terminal speed - what is the power expended by the air resistance?
P = F(v) = mg(v -terminal)
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
P = IV
Constant to overcome the heat of fusion (solid to liquid state)

42. 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?
(density[p])(volume)
Density (gravitational constant) height
W = F(displacement)
Add them together

43. 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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44. Why are bonds between H and another atom shorter compared to most?
It can also equal 'mg'; the compressive strength of a substance
Ability to locate an event in space
Mag and direction
H has a small atomic radius

45. The total pressure of a solution is what? Give example.
It can absorb light that lets other electrons fill those orbitals
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
Yes - if the particle's trail is equidistant between two adjacent anodes
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

46. If you have circuit elements in parallel what is the same across them?
1000
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
Voltage
Red

47. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Polar
They increase because you hear a lower frequency
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

48. The basicity constant Kb measures what?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
A saturated solution in which the aqueous ions are in equilibrium with the solid
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
How strong a base is

49. The visible spectrum ranges from ____ to _____
400 to 700 nm
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
It can absorb light that lets other electrons fill those orbitals
A constant force on a mass causes it to have a constant acceleration

50. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Positron because this is known as positron decay/electron capture
+/- 1/2
Cathode; anode