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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 are the units of an electric field?
Electron shell number
Energy
V/m or N/C
You look at what is being oxidized and reduced in the problem

2. What is different between an inclined plane and free fall?
That of static friction; there is a net accelerating force on the block once it starts to slide
1000
-l to +l
The path is longer on the inclined plane so it will take object longer to reach the bottom

3. What is weight equal to?
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 reaction between the base and water
Mg
Electron shell number

4. When you are trying to calculate a galvanic cell's emf - what do you look at?
Mv = mv
Ability to locate an event in space
T = 2pi/angular velocity; v/r
You look at what is being oxidized and reduced in the problem

5. What kind of charge is on Al?
Red
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
3+

6. If you are given density and volume how do you find mass?
It's weight = mg; h
They do not differ
(density[p])(volume)
Colligative: it depends on the number of solute molecules in a given volume of water

7. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
Accelerated by a higher voltage between the cathode and anode
Mag and direction
[S][2S]^2 = 4S^3
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

8. How would you find rate of rxn from pH 1 to pH2?
Decreasing potential energy
Half of the exponent
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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

9. In radioactive decay the atomic number (A) and mass number (Z) must what?
NO; reduction-oxidation
Zero
When you have central atom with six ions on it
They must balance

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

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11. What is the amt of energy that a frictional force generates?
A positron or electron; when atomic number goes up you know an electron has been emitted
The particle's charge and the magnitude of the electric field
Force times the distance over which the force acts
Where an event took place

12. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Isolating an atom from minerals by decomposing the minerals with an electric current
P = F(v) = mg(v -terminal)
When all the external forces = zero

13. Nuclear masses can be approximated from what?

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14. The phase difference corresponding to a half wave is what? When do you get destructive interference?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It can also equal 'mg'; the compressive strength of a substance
180 degrees; when there is half a wave distance in phase between two waves
A constant force on a mass causes it to have a constant acceleration

15. In order to guarantee a non-zero spin how many electrons are needed?
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
An odd number
Mg
Energy

16. What kind of geometry is octahedral?
When you have central atom with six ions on it
The current is the same
Mg
They must balance

17. What happens to a negatively charged particle put between two parallel plates?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The lowest one
Its intensity in the spectrum
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

18. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
It's weight = mg; h
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
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

19. Can a catalyst shift equilibrium?
No - it increases the speed at which the rxn reaches that equilibrium
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 volume of the ice cube or whatever it is
It's weight = mg; the work would be the weight times the distance fell

20. 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?
Gravity
The density of the water and volume of the lead object
NO; reduction-oxidation
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)

21. Light can be carried along a distance within a transparent material by means of what?
Positron because this is known as positron decay/electron capture
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It decreases; the work done by the gas in expanding decreases its internal energy
Total internal reflection

22. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
It will increase as well because they are directly related - only if pressure is kept constant
It will be reduced the voltage produced by the resistor which means IR; E- IR
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Electrons from anode and battery

23. Heat from friction comes from what?
Decreasing potential energy
The reaction between the base and water
Faraday/electrons
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

24. If asked which electron configuration of an element is most stable which one do you choose?
H = negative and S = positive
The regular one
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Helium; 4

25. Kb is the equilibrium constant for what?
-l to +l
Total internal reflection
The reaction between the base and water
The volume of the ice cube or whatever it is

26. 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?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The volume of the ice cube or whatever it is
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
From peak to peak

27. What is the equation for pressure?
Density (gravitational constant) height
Only temperature of the water bath
H = negative and S = positive
One mole of electric charge

28. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
F =ma and F= qE
The reaction between the base and water

29. Why are bonds between H and another atom shorter compared to most?
It decreases; the work done by the gas in expanding decreases its internal energy
Faraday/electrons
H has a small atomic radius
From peak to peak

30. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Faraday/electrons
Positive
They are directly proportional

31. What is the equation for work done?
P = F(v) = mg(v -terminal)
W = F(displacement)
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
That of static friction; there is a net accelerating force on the block once it starts to slide

32. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
It decreases; the work done by the gas in expanding decreases its internal energy
Neutrons; atomic number
B = pVg; density

33. The free energy change (G) must be negative when what?
That they are catalysts in the rxn because they react with the substrate and are reformed
H = negative and S = positive
When all the external forces = zero
The force along the board to the normal force

34. What is the doppler equation for wavelength and frequency?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
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
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

35. The number of incident photons on the cathode affect what?
Sp^3
It decreases; the work done by the gas in expanding decreases its internal energy
The number of electrons emitted
Energy

36. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
It's weight = mg; h
The number of electrons emitted
It has a positive oxidation potential so it is easily oxidized
One that has more solute particles per liter of solution

37. 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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38. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
1000
Going from solid to gas phase

39. 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?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The lowest one
Isolating an atom from minerals by decomposing the minerals with an electric current
Voltage

40. Neither N2 or O2 have a permanent what? What does this mean?
7 always!!!
The force along the board to the normal force
1000
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

41. Acetic acid is a ______ solvent
-l to +l
Polar
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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

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

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43. 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
An odd number
NO; reduction-oxidation
Red

44. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
Cathode; anode
Alkali metals = first column
An odd number
(+)

45. The square root of 10^anything is equal to what?
Half of the exponent
6.02 x 10^23 ions/mol
It can also equal 'mg'; the compressive strength of a substance
At an equal distance behind it as the object is in front of the mirror

46. What is the principal quantum number (n)?
At an equal distance behind it as the object is in front of the mirror
When all the external forces = zero
Electron shell number
B = pVg; density

47. What is the relationship between P and n in PV=nRT?
Total internal reflection
The current is the same
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
They are directly proportional

48. The closer the spacing of the anode wire - the better one can specify what?
Negative
Where an event took place
It will be reduced the voltage produced by the resistor which means IR; E- IR
The nucleus gains a proton and no neutrons

49. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
The regular one
-l to +l

50. 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?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
0 Hz because they are traveling side by side at the same speed
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure