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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. What happens to a negatively charged particle put between two parallel plates?
Polar
Colligative: it depends on the number of solute molecules in a given volume of water
In the presence of a base
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

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

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3. A pendulum moves under the influence of what?
Ability to locate an event in space
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Gravity
Where an event took place

4. When a falling mass is at terminal speed - what is the power expended by the air resistance?
The buoyant force on it; W = mg = pVg
Energy
P = F(v) = mg(v -terminal)
A saturated solution in which the aqueous ions are in equilibrium with the solid

5. How would you find rate of rxn from pH 1 to pH2?
Faraday/electrons
H has a small atomic radius
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass

6. 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
H = negative and S = positive
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Attractive molecular forces acting between material surfaces in contact

7. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
Density (gravitational constant) height
Neutrons; atomic number
P = IV
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

8. Mechanical waves in a medium fxn to transport what?
Sp^3
Energy
0 Hz because they are traveling side by side at the same speed
When electron falls from high energy to low energy level

9. If asked which electron configuration of an element is most stable which one do you choose?
The regular one
B = pVg; density
The reaction between the base and water
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

10. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
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
That it is negative
Energy

11. A plane mirror produces an image where?
(density[p])(volume)
At an equal distance behind it as the object is in front of the mirror
External components of the circuit
When electron falls from high energy to low energy level

12. If temperature arises during a mixture what can you conclude about the enthalpy?
Pascal (N*m^2)
That it is negative
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
External components of the circuit

13. Friction is caused by 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
Momentum
Attractive molecular forces acting between material surfaces in contact
A positron or electron; when atomic number goes up you know an electron has been emitted

14. What is the equation for pressure?
Density (gravitational constant) height
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
Liquid displaced by that object
7 always!!!

15. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
It decreases; the work done by the gas in expanding decreases its internal energy
The nucleus gains a proton and no neutrons
No - it increases the speed at which the rxn reaches that equilibrium
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

16. The temperature of a metal will not increase above its melting point until what?
(density[p])(volume)
Neutrons; atomic number
The path is longer on the inclined plane so it will take object longer to reach the bottom
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

17. What energy conversion describes best what takes place in a battery-powered resistive circuit?
B = pVg; density
400 to 700 nm
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

18. 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?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
It has a positive oxidation potential so it is easily oxidized
Going from solid to gas phase
A saturated solution in which the aqueous ions are in equilibrium with the solid

19. The free energy change (G) must be negative when what?
Colligative; the number of solute particles present
Attractive molecular forces acting between material surfaces in contact
H = negative and S = positive
One mole of electric charge

20. The volume of an object is equal to water?
Liquid displaced by that object
How strong a base is
The element's mass number
The cross-sectional area through which the fluid flows

21. Can a catalyst shift equilibrium?
W = F(displacement)
No - it increases the speed at which the rxn reaches that equilibrium
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Its intensity in the spectrum

22. What does the empirical formula show?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The lowest whole number ratio of moles of each element in a mole of a cmpd
F =ma and F= qE

23. What is the doppler equation for wavelength and frequency?
Decreasing potential energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Strong acid and strong base/ weak acid and weak base

24. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
When you have central atom with six ions on it
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Sp^3

25. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
Energy
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
180 degrees; when there is half a wave distance in phase between two waves

26. What is a metathesis rxn?
Total internal reflection
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
Neutrons; atomic number
That it is negative

27. What direction do gravity and bouyancy work? What direction does water pressure work?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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
Vertically; perpendicular to all surfaces
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

28. If you have circuit elements in parallel what is the same across them?
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
Voltage
[A]^a[B]^b
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

29. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
It can also equal 'mg'; the compressive strength of a substance
(+)
The cross-sectional area through which the fluid flows

30. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Colligative: it depends on the number of solute molecules in a given volume of water
H = negative and S = positive
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

31. How do you find 'g' from Newton's law of gravity?
(density[p])(volume)
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 number of electrons emitted

32. The freezing point of an aqueous solution is what kind of property? 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
180 degrees; when there is half a wave distance in phase between two waves
Only temperature of the water bath
Colligative: it depends on the number of solute molecules in a given volume of water

33. In radioactive decay the atomic number (A) and mass number (Z) must what?
The particle's charge and the magnitude of the electric field
They must balance
They are directly proportional
Momentum

34. The concentration of OH and H30 ions are approximately equal at what pH?
7 always!!!
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
Isolating an atom from minerals by decomposing the minerals with an electric current
It will increase as well because they are directly related - only if pressure is kept constant

35. What is sublimation?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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
Red
Going from solid to gas phase

36. Nuclear masses can be approximated from what?

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37. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
It decreases; the work done by the gas in expanding decreases its internal energy
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Momentum
7 always!!!

38. If both weight and bouyant force are dependent on g - that makes g independent of what?
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
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)
It has a positive oxidation potential so it is easily oxidized

39. In Bohr model of atom when is energy emitted?
Mg
When electron falls from high energy to low energy level
Yes - if the particle's trail is equidistant between two adjacent anodes
At an equal distance behind it as the object is in front of the mirror

40. What is the relationship between P and n in PV=nRT?
That of static friction; there is a net accelerating force on the block once it starts to slide
180 degrees; when there is half a wave distance in phase between two waves
They are directly proportional
Red

41. The total pressure of a solution is what? Give example.
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
It can absorb light that lets other electrons fill those orbitals
The path is longer on the inclined plane so it will take object longer to reach the bottom
It's weight = mg; the work would be the weight times the distance fell

42. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
It decreases; the work done by the gas in expanding decreases its internal energy
V/m or N/C
Positive
Electrons from anode and battery

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. Half-sine wave shape is what kind of wavelength with regards to length?
Neutrons; atomic number
0 Hz because they are traveling side by side at the same speed
Negative
L = wavelength/2 so L= (wavelength)(2)

45. The boiling point of a solution is what type of property? Which means is depends only on what?
That of static friction; there is a net accelerating force on the block once it starts to slide
It can also equal 'mg'; the compressive strength of a substance
Colligative; the number of solute particles present
They must balance

46. Why does light travel slower in an optically dense medium than through a vacuum?
[S][2S]^2 = 4S^3
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Going from solid to gas phase

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

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48. 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
3+
(+)
Its momentum is zero because velocity is zero; zero because of conservation of momentum

49. What is the amt of energy that a frictional force generates?
An odd number
At an equal distance behind it as the object is in front of the mirror
Force times the distance over which the force acts
Ability to locate an event in space

50. The square root of 10^anything is equal to what?
Half of the exponent
Faraday/electrons
V/m or N/C
Constant to overcome the heat of fusion (solid to liquid state)