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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. The electrons emitted from cathode are replaced with what?
Vertically; perpendicular to all surfaces
180 degrees; when there is half a wave distance in phase between two waves
[A]^a[B]^b
Electrons from anode and battery

2. If you are given density and volume how do you find mass?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
(density[p])(volume)
Its twice that distance
It's weight = mg; the work would be the weight times the distance fell

3. What is conserved in an inellastic collision?
Momentum
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
Density (gravitational constant) height
Energy

4. Nuclear masses can be approximated from what?

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5. Hydrogen has what kind of standard oxidation or reduction potential?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
When all the external forces = zero
Zero

6. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The element's mass number
When all the external forces = zero

7. Heat from friction comes from what?
It decreases; the work done by the gas in expanding decreases its internal energy
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
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
Decreasing potential energy

8. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
It has a positive oxidation potential so it is easily oxidized
H = negative and S = positive
Alkali metals = first column

9. What is sublimation?
Red
It can also equal 'mg'; the compressive strength of a substance
[S][2S]^2 = 4S^3
Going from solid to gas phase

10. The coefficient of static friction is the ratio of what?
Positron because this is known as positron decay/electron capture
The force along the board to the normal force
One mole of electric charge
One that has more solute particles per liter of solution

11. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
An odd number
That it is negative
When all the external forces = zero

12. The range of pH in which a color change takes place in a titration depends on what?
It's weight = mg; the work would be the weight times the distance fell
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The current is the same
T = (2h/g)^1/2; distance = vt

13. In PV=nRT - if temp increases what will happen to volume?
Pascal (N*m^2)
The density of the water and volume of the lead object
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It will increase as well because they are directly related - only if pressure is kept constant

14. Strength of dispersion force increases with what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
[S][2S]^2 = 4S^3
Negative
One mole of electric charge

15. In general what is formed by an acid-base rxn?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The reaction between the base and water
A salt and water
An odd number

16. What kind of metals react violently with water?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Electrons from anode and battery
V/m or N/C
Alkali metals = first column

17. What is the equation for pressure?
Density (gravitational constant) height
The current is the same
A saturated solution in which the aqueous ions are in equilibrium with the solid
Momentum

18. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Neutrons; atomic number
The regular one
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 nucleus gains a proton and no neutrons

19. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
(density[p])(volume)
+/- 1/2
It will be reduced the voltage produced by the resistor which means IR; E- IR

20. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
F =ma and F= qE
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

21. What direction do gravity and bouyancy work? What direction does water pressure work?
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Vertically; perpendicular to all surfaces
The particle's charge and the magnitude of the electric field

22. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Energy
0 Hz because they are traveling side by side at the same speed
P = F(v) = mg(v -terminal)
One that has more solute particles per liter of solution

23. For a given flow rate - the speed of fluid flow is inversely proportional to what?
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
The cross-sectional area through which the fluid flows
[A]^a[B]^b
That they are catalysts in the rxn because they react with the substrate and are reformed

24. The basicity constant Kb measures what?
When all the external forces = zero
[S][2S]^2 = 4S^3
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
How strong a base is

25. What is the magnetic quantum number?
-l to +l
7 always!!!
Liquid displaced by that object
Decreasing potential energy

26. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
F = GMm/r^2
It can absorb light that lets other electrons fill those orbitals
The cross-sectional area through which the fluid flows
They increase because you hear a lower frequency

27. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Voltage
A saturated solution in which the aqueous ions are in equilibrium with the solid

28. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
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
E = (kq)/r^2
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Going from solid to gas phase

29. If both weight and bouyant force are dependent on g - that makes g independent of what?
At an equal distance behind it as the object is in front of the mirror
In the presence of a base
External components of the circuit
The volume of the ice cube or whatever it is

30. What is usually conserved over oscillation periods?
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
The nucleus gains a proton and no neutrons
The path is longer on the inclined plane so it will take object longer to reach the bottom
Energy

31. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
Its intensity in the spectrum
NO; reduction-oxidation

32. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Strong acid and strong base/ weak acid and weak base
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)
They do not differ
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

33. What is the principal quantum number (n)?
Liquid displaced by that object
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Polar
Electron shell number

34. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Cathode; anode
Isolating an atom from minerals by decomposing the minerals with an electric current
V/m or N/C

35. When an element decreases its atomic number by one what is emitted?
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
Positron because this is known as positron decay/electron capture
Mag and direction
Cathode; anode

36. What is the spin projection quantum number?
+/- 1/2
They are directly proportional
Neutrons; atomic number
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

37. What does spatial resolution refer to?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Ability to locate an event in space
Going from solid to gas phase
The number of electrons emitted

38. What is the equation for work done?
Energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
W = F(displacement)
The force along the board to the normal force

39. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
Gravity
Voltage
Electrons from anode and battery

40. 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?
Positron because this is known as positron decay/electron capture
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
F = GMm/r^2

41. 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?
0 Hz because they are traveling side by side at the same speed
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The reaction between the base and water
It's weight = mg; the work would be the weight times the distance fell

42. F in the Young's modulus equation can also equal what? What is E?

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43. The square root of 10^anything is equal to what?
Half of the exponent
Positron emission
Alkali metals = first column
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

44. 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?
Decreasing potential energy
The cross-sectional area through which the fluid flows
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

45. A nearsighted person has what type of focal length? Thus what do we do to correct this?
The lowest whole number ratio of moles of each element in a mole of a cmpd
[S][2S]^2 = 4S^3
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Density (gravitational constant) height

46. A pendulum moves under the influence of what?
One that has more solute particles per liter of solution
Positron because this is known as positron decay/electron capture
Gravity
Momentum

47. When does red litmus paper turn blue?
In the presence of a base
A constant force on a mass causes it to have a constant acceleration
Positive
Yes - if the particle's trail is equidistant between two adjacent anodes

48. What is the law of conservation of linear momentum?
When all the external forces = zero
Mv = mv
Zero
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

49. What is the magnitude of the electric field produced by a point charge?
A saturated solution in which the aqueous ions are in equilibrium with the solid
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
F =ma and F= qE
E = (kq)/r^2

50. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

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