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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. The free energy change (G) must be negative when what?
When you have central atom with six ions on it
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
H = negative and S = positive
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

2. Mechanical waves in a medium fxn to transport what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The element's mass number
It can absorb light that lets other electrons fill those orbitals
Energy

3. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

4. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The particle's charge and the magnitude of the electric field
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Voltage

5. 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?
External components of the circuit
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The density of the water and volume of the lead object
Positron emission

6. What do electrolytic techniques involve?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

7. The boiling point of a solution is what type of property? Which means is depends only on what?
From peak to peak
B = pVg; density
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Colligative; the number of solute particles present

8. The total pressure of a solution is what? Give example.
Positron because this is known as positron decay/electron capture
(+)
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
W = F(displacement)

9. In Bohr model of atom when is energy emitted?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
You look at what is being oxidized and reduced in the problem
It's weight = mg; the work would be the weight times the distance fell
When electron falls from high energy to low energy level

10. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
+/- 1/2
Only temperature of the water bath
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

11. Light can be carried along a distance within a transparent material by means of what?
Electron shell number
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
Total internal reflection
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

12. What does spatial resolution refer to?
Colligative: it depends on the number of solute molecules in a given volume of water
F = GMm/r^2
They do not differ
Ability to locate an event in space

13. 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?

14. When something is falling what is the force acting on it? Thus what would be the work done?

15. Can a catalyst shift equilibrium?
At an equal distance behind it as the object is in front of the mirror
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
No - it increases the speed at which the rxn reaches that equilibrium
External components of the circuit

16. What is the equation for bouyant force? What is p?
B = pVg; density
Going from solid to gas phase
The nucleus gains a proton and no neutrons
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

17. How would you find rate of rxn from pH 1 to pH2?
It decreases; the work done by the gas in expanding decreases its internal energy
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
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
P = IV

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

19. 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?
The lowest one
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
0 Hz because they are traveling side by side at the same speed
Mv = mv

20. What color is above 656 nm?
Yes - if the particle's trail is equidistant between two adjacent anodes
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Its twice that distance
Red

21. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
Positive
The nucleus gains a proton and no neutrons
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

22. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Going from solid to gas phase
Helium; 4
Faraday/electrons
Mass number stays the same but the atomic number increases

23. In order to increase the kinetic energy of electrons - they must be what?
H = negative and S = positive
Density (gravitational constant) height
Accelerated by a higher voltage between the cathode and anode
Force times the distance over which the force acts

24. The visible spectrum ranges from ____ to _____
400 to 700 nm
H = negative and S = positive
A salt and water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

25. 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
Its twice that distance
That it is negative
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

26. 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
E = (kq)/r^2
It will increase as well because they are directly related - only if pressure is kept constant
H has a small atomic radius

27. What is conserved in an inellastic collision?
H = negative and S = positive
Attractive molecular forces acting between material surfaces in contact
Gravity
Momentum

28. If asked which electron configuration of an element is most stable which one do you choose?
Its twice that distance
The regular one
The reaction between the base and water
[A]^a[B]^b

29. How many mL is in one liter?
Strong acid and strong base/ weak acid and weak base
1000
Add them together
Ability to locate an event in space

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

31. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
The element's mass number
(+)
7 always!!!
At an equal distance behind it as the object is in front of the mirror

32. The force on an electrical charge is what?
When all the external forces = zero
H has a small atomic radius
F =ma and F= qE
A saturated solution in which the aqueous ions are in equilibrium with the solid

33. How should the period of a waveform be calculated?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
From peak to peak
The particle's charge and the magnitude of the electric field

34. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
A salt and water
Positron emission

35. What is different between an inclined plane and free fall?
The lowest whole number ratio of moles of each element in a mole of a cmpd
The path is longer on the inclined plane so it will take object longer to reach the bottom
Add them together
Polar

36. 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?
Mag and direction
It will be reduced the voltage produced by the resistor which means IR; E- IR
They do not differ
Positive

37. The concentration of OH and H30 ions are approximately equal at what pH?
7 always!!!
Accelerated by a higher voltage between the cathode and anode
They are directly proportional
Its intensity in the spectrum

38. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
One mole of electric charge
Zero
3+

39. What is the formula for the power supplied by a battery to accelerate an electron beam?
Energy
Isolating an atom from minerals by decomposing the minerals with an electric current
P = IV
Only temperature of the water bath

40. What kind of charge is on Al?
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
3+
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Colligative; the number of solute particles present

41. 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?
It has a positive oxidation potential so it is easily oxidized
The reaction between the base and water
Ability to locate an event in space
V/m or N/C

42. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
3+
A salt and water
Positive
Mass number stays the same but the atomic number increases

43. The volume of an object is equal to water?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Liquid displaced by that object
It can absorb light that lets other electrons fill those orbitals
Mass number stays the same but the atomic number increases

44. Kb is the equilibrium constant for what?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The reaction between the base and water
Neutrons; atomic number
Accelerated by a higher voltage between the cathode and anode

45. In a rxn - how do you figure out which atom has the highest electron affinity?
Positron because this is known as positron decay/electron capture
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
In the presence of a base
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

46. Neither N2 or O2 have a permanent what? What does this mean?
Mv = mv
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
F =ma and F= qE
T = 2pi/angular velocity; v/r

47. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
L = wavelength/2 so L= (wavelength)(2)
The force along the board to the normal force
The nucleus gains a proton and no neutrons

48. What energy conversion describes best what takes place in a battery-powered resistive circuit?
Density (gravitational constant) height
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Mass number stays the same but the atomic number increases

49. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
1000
Gravity
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

50. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
It has a positive oxidation potential so it is easily oxidized
[S][2S]^2 = 4S^3
The density of the water and volume of the lead object
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)