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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. In Bohr model of atom when is energy emitted?
It's weight = mg; h
They are directly proportional
F = GMm/r^2
When electron falls from high energy to low energy level

2. What is a metathesis rxn?
E = (kq)/r^2
It will be reduced the voltage produced by the resistor which means IR; E- IR
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

3. What kind of geometry is octahedral?
One that has more solute particles per liter of solution
Its twice that distance
When HIn is turned into In- - which is dependent upon the pKa of the indicator
When you have central atom with six ions on it

4. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That it is negative
From peak to peak
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That they are catalysts in the rxn because they react with the substrate and are reformed

5. 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?
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
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 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
Its intensity in the spectrum

6. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
The force along the board to the normal force
It has a positive oxidation potential so it is easily oxidized
It can absorb light that lets other electrons fill those orbitals
Mag and direction

7. The concentration of OH and H30 ions are approximately equal at what pH?
The volume of the ice cube or whatever it is
7 always!!!
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
It will be reduced the voltage produced by the resistor which means IR; E- IR

8. The range of pH in which a color change takes place in a titration depends on what?
You look at what is being oxidized and reduced in the problem
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
When HIn is turned into In- - which is dependent upon the pKa of the indicator
It's weight = mg; h

9. What is the relationship between P and n in PV=nRT?
That they are catalysts in the rxn because they react with the substrate and are reformed
They are directly proportional
Constant to overcome the heat of fusion (solid to liquid state)
Only temperature of the water bath

10. Friction is caused by 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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
NO; reduction-oxidation
Attractive molecular forces acting between material surfaces in contact

11. 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?
E = (kq)/r^2
0 Hz because they are traveling side by side at the same speed
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

12. A floating ice cube implies that it's weight is balanced by what?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Vertically; perpendicular to all surfaces
The buoyant force on it; W = mg = pVg
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

13. What is one faraday equal to?
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
The regular one
P = IV
One mole of electric charge

14. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
The cross-sectional area through which the fluid flows
+/- 1/2
You look at what is being oxidized and reduced in the problem
Cathode; anode

15. 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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16. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
(+)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
In the presence of a base
Sp^3

17. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
W = F(displacement)
Mass number stays the same but the atomic number increases
Only temperature of the water bath
It can also equal 'mg'; the compressive strength of a substance

18. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The buoyant force on it; W = mg = pVg
The lowest one
Constant to overcome the heat of fusion (solid to liquid state)
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

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
Force times the distance over which the force acts
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Positron because this is known as positron decay/electron capture

20. What is usually conserved over oscillation periods?
Energy
The current is the same
Force times the distance over which the force acts
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

21. When an element decreases its atomic number by one what is emitted?
Ability to locate an event in space
Positron because this is known as positron decay/electron capture
Attractive molecular forces acting between material surfaces in contact
Yes - if the particle's trail is equidistant between two adjacent anodes

22. What is sublimation?
F = GMm/r^2
They are directly proportional
Going from solid to gas phase
-l to +l

23. Equivalent mass is what?
H = negative and S = positive
A salt and water
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
The lowest one

24. Light can be carried along a distance within a transparent material by means of what?
A salt and water
Total internal reflection
That of static friction; there is a net accelerating force on the block once it starts to slide
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

25. Beta decay is the same as what?
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
The regular one
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
Positron emission

26. A plane mirror produces an image where?
Ability to locate an event in space
Attractive molecular forces acting between material surfaces in contact
At an equal distance behind it as the object is in front of the mirror
A constant force on a mass causes it to have a constant acceleration

27. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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28. The probability of an X-ray emission event at a given wavelength is measured by what?
It can also equal 'mg'; the compressive strength of a substance
Positron emission
Its intensity in the spectrum
The density of the water and volume of the lead object

29. What is the amt of energy that a frictional force generates?
F = GMm/r^2
The number of electrons emitted
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Force times the distance over which the force acts

30. The total pressure of a solution is what? Give example.
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
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
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 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

31. What color is above 656 nm?
6.02 x 10^23 ions/mol
A positron or electron; when atomic number goes up you know an electron has been emitted
Red
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

32. What is weight equal to?
Mg
Ability to locate an event in space
Momentum
+/- 1/2

33. A pendulum moves under the influence of what?
Half of the exponent
Gravity
Yes - if the particle's trail is equidistant between two adjacent anodes
The reaction between the base and water

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

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35. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Mag and direction
P = F(v) = mg(v -terminal)
3+
Red

36. What kind of metals react violently with water?
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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
Alkali metals = first column

37. 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
It will be reduced the voltage produced by the resistor which means IR; E- IR
They increase because you hear a lower frequency
The current is the same

38. What if the circuit elements are in series?
The current is the same
From peak to peak
An odd number
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

39. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
A constant force on a mass causes it to have a constant acceleration
In the presence of a base
+/- 1/2

40. The force on an electrical charge is what?
The regular one
F =ma and F= qE
It can absorb light that lets other electrons fill those orbitals
Zero

41. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Add them together
Where an event took place
That they are catalysts in the rxn because they react with the substrate and are reformed

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

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43. 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?
Add them together
Density (gravitational constant) height
T = (2h/g)^1/2; distance = vt
Mv = mv

44. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
It's weight = mg; h
The path is longer on the inclined plane so it will take object longer to reach the bottom
Positron because this is known as positron decay/electron capture
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

45. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
The lowest one
The particle's charge and the magnitude of the electric field
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

46. What is Avagadro's number regarding ions/mol?
Its twice that distance
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
6.02 x 10^23 ions/mol
P = IV

47. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
Energy
A positron or electron; when atomic number goes up you know an electron has been emitted
Positive
The nucleus gains a proton and no neutrons

48. In radioactive decay the atomic number (A) and mass number (Z) must what?
NO; reduction-oxidation
You look at what is being oxidized and reduced in the problem
Sp^3
They must balance

49. Acetic acid is a ______ solvent
Polar
It can also equal 'mg'; the compressive strength of a substance
A salt and water
[S][2S]^2 = 4S^3

50. 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?
Its intensity in the spectrum
Negative
It will be reduced the voltage produced by the resistor which means IR; E- IR
Attractive molecular forces acting between material surfaces in contact