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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. In order to increase the kinetic energy of electrons - they must be 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
Its twice that distance
Accelerated by a higher voltage between the cathode and anode
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

2. When an element decreases its atomic number by one what is emitted?
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
Colligative: it depends on the number of solute molecules in a given volume of water
External components of the circuit
Positron because this is known as positron decay/electron capture

3. 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
At an equal distance behind it as the object is in front of the mirror
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
The element's mass number

4. The probability of an X-ray emission event at a given wavelength is measured by what?
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
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
When all the external forces = zero

5. How do you find 'g' from Newton's law of gravity?
Decreasing potential energy
The density of the water and volume of the lead object
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The path is longer on the inclined plane so it will take object longer to reach the bottom

6. Is the work done by air resistance - positive or negative?
Negative
Vertically; perpendicular to all surfaces
At an equal distance behind it as the object is in front of the mirror
You look at what is being oxidized and reduced in the problem

7. 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
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Isolating an atom from minerals by decomposing the minerals with an electric current
The force along the board to the normal force

8. If asked which electron configuration of an element is most stable which one do you choose?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
7 always!!!
The regular one
L = wavelength/2 so L= (wavelength)(2)

9. 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
That it is negative
In the presence of a base
V/m or N/C

10. What is the formula for the power supplied by a battery to accelerate an electron beam?
Colligative: it depends on the number of solute molecules in a given volume of water
L = wavelength/2 so L= (wavelength)(2)
It can absorb light that lets other electrons fill those orbitals
P = IV

11. What does the empirical formula show?
H has a small atomic radius
The lowest whole number ratio of moles of each element in a mole of a cmpd
Energy
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

12. What is a metathesis rxn?
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
The volume of the ice cube or whatever it is
Density (gravitational constant) height

13. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Positron emission
Colligative: it depends on the number of solute molecules in a given volume of water
No - it increases the speed at which the rxn reaches that equilibrium
[S][2S]^2 = 4S^3

14. What is the principal quantum number (n)?
Electron shell number
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)
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Mv = mv

15. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
The lowest one
External components of the circuit
They must balance

16. What is the equation for bouyant force? What is p?
Vertically; perpendicular to all surfaces
They increase because you hear a lower frequency
Neutrons; atomic number
B = pVg; density

17. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Voltage
The lowest one
The force along the board to the normal force
Mag and direction

18. Heat from friction comes from what?
Decreasing potential energy
Electron shell number
Positron because this is known as positron decay/electron capture
Mg

19. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
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
Sp^3
Faraday/electrons
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

20. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
180 degrees; when there is half a wave distance in phase between two waves
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
Energy
Polar

21. What direction do gravity and bouyancy work? What direction does water pressure work?
Vertically; perpendicular to all surfaces
It's weight = mg; the work would be the weight times the distance fell
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Going from solid to gas phase

22. Acetic acid is a ______ solvent
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
Polar
Vertically; perpendicular to all surfaces
NO; reduction-oxidation

23. The total pressure of a solution is what? Give example.
Polar
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
A saturated solution in which the aqueous ions are in equilibrium with the solid

24. What is the amt of energy that a frictional force generates?
Electron shell number
Force times the distance over which the force acts
Gravity
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

25. When is a body in translational equilibrium?
Colligative; the number of solute particles present
0 Hz because they are traveling side by side at the same speed
When all the external forces = zero
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

26. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
They do not differ
Mg
It decreases; the work done by the gas in expanding decreases its internal energy
B = pVg; density

27. When you are trying to calculate a galvanic cell's emf - what do you look at?
1000
They are directly proportional
You look at what is being oxidized and reduced in the problem
F =ma and F= qE

28. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
One that has more solute particles per liter of solution
Faraday/electrons

29. What is the magnetic quantum number?
They increase because you hear a lower frequency
7 always!!!
The particle's charge and the magnitude of the electric field
-l to +l

30. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
F = GMm/r^2
At an equal distance behind it as the object is in front of the mirror
That they are catalysts in the rxn because they react with the substrate and are reformed

31. How should the period of a waveform be calculated?
Where an event took place
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 current is the same
From peak to peak

32. The square root of 10^anything is equal to what?
Colligative; the number of solute particles present
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
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

33. Hydrogen has what kind of standard oxidation or reduction potential?
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Zero
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

34. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
Energy
That it is negative
When electron falls from high energy to low energy level
Only temperature of the water bath

35. In Bohr model of atom when is energy emitted?
Strong acid and strong base/ weak acid and weak base
When electron falls from high energy to low energy level
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
180 degrees; when there is half a wave distance in phase between two waves

36. 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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
[A]^a[B]^b
It's weight = mg; h

37. 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?
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
The buoyant force on it; W = mg = pVg
Add them together

38. The visible spectrum ranges from ____ to _____
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Its twice that distance
Polar
400 to 700 nm

39. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
-l to +l
Yes - if the particle's trail is equidistant between two adjacent anodes
Its momentum is zero because velocity is zero; zero because of conservation of momentum

40. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
They increase because you hear a lower frequency
P = IV
W = F(displacement)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

41. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

42. The range of pH in which a color change takes place in a titration depends on what?
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)
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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
In the presence of a base

43. What is the doppler equation for wavelength and frequency?
An odd number
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
External components of the circuit

44. The number of incident photons on the cathode affect what?
F = GMm/r^2
H has a small atomic radius
The number of electrons emitted
It decreases; the work done by the gas in expanding decreases its internal energy

45. Always remember that velocity has ____ and ____
Mag and direction
F = GMm/r^2
Voltage
At an equal distance behind it as the object is in front of the mirror

46. Nuclear masses can be approximated from what?

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47. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
The buoyant force on it; W = mg = pVg
The particle's charge and the magnitude of the electric field
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

48. The coefficient of kinetic friction is always lower than what? Therefore what?
Ability to locate an event in space
That of static friction; there is a net accelerating force on the block once it starts to slide
Faraday/electrons
F =ma and F= qE

49. 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?
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
P = F(v) = mg(v -terminal)
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

50. What is sublimation?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
It will increase as well because they are directly related - only if pressure is kept constant
Going from solid to gas phase
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2