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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 is weight equal to?
It's weight = mg; the work would be the weight times the distance fell
The buoyant force on it; W = mg = pVg
Mg
Density (gravitational constant) height

2. What is usually conserved over oscillation periods?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Energy
From peak to peak
That they are catalysts in the rxn because they react with the substrate and are reformed

3. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
That it is negative
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

4. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
That it is negative
One that has more solute particles per liter of solution
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Positron because this is known as positron decay/electron capture

5. What is the principal quantum number (n)?
Electron shell number
You look at what is being oxidized and reduced in the problem
The force along the board to the normal force
A saturated solution in which the aqueous ions are in equilibrium with the solid

6. Heat from friction comes from what?
Decreasing potential energy
When all the external forces = zero
The lowest one
H = negative and S = positive

7. What does the empirical formula show?
T = 2pi/angular velocity; v/r
Mass number stays the same but the atomic number increases
The lowest whole number ratio of moles of each element in a mole of a cmpd
A positron or electron; when atomic number goes up you know an electron has been emitted

8. Melting occurs at what type of temperature? Why?
L = wavelength/2 so L= (wavelength)(2)
Constant to overcome the heat of fusion (solid to liquid state)
(density[p])(volume)
400 to 700 nm

9. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Total internal reflection
The force along the board to the normal force
That they are catalysts in the rxn because they react with the substrate and are reformed
It's weight = mg; h

10. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
H = negative and S = positive
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
It will be reduced the voltage produced by the resistor which means IR; E- IR
The element's mass number

11. 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?
The cross-sectional area through which the fluid flows
-l to +l
The path is longer on the inclined plane so it will take object longer to reach the bottom
It will be reduced the voltage produced by the resistor which means IR; E- IR

12. 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 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
An odd number
H = negative and S = positive
That they are catalysts in the rxn because they react with the substrate and are reformed

13. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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
Pascal (N*m^2)
A constant force on a mass causes it to have a constant acceleration

14. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Voltage
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
External components of the circuit
They are directly proportional

15. What is the formula for the power supplied by a battery to accelerate an electron beam?
Positron because this is known as positron decay/electron capture
Helium; 4
P = IV
The element's mass number

16. What is the magnetic quantum number?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Gravity
-l to +l
7 always!!!

17. A plane mirror produces an image where?
It's weight = mg; the work would be the weight times the distance fell
At an equal distance behind it as the object is in front of the mirror
Alkali metals = first column
From peak to peak

18. If you are given density and volume how do you find mass?
Density (gravitational constant) height
Its twice that distance
(density[p])(volume)
Cathode; anode

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?
No - it increases the speed at which the rxn reaches that equilibrium
(density[p])(volume)
Mv = mv
0 Hz because they are traveling side by side at the same speed

20. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
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
Sp^3
Its twice that distance
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

21. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
When you have central atom with six ions on it
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
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

22. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The number of electrons emitted
It will be reduced the voltage produced by the resistor which means IR; E- IR
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

23. 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
T = 2pi/angular velocity; v/r
Decreasing potential energy
The current is the same

24. The Ksp for a substance of AaBb is what?
F =ma and F= qE
[A]^a[B]^b
An odd number
One that has more solute particles per liter of solution

25. When an element decreases its atomic number by one what is emitted?
The buoyant force on it; W = mg = pVg
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
Positron because this is known as positron decay/electron capture

26. Terminal voltage is provided to what?
Gravity
External components of the circuit
3+
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

27. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
Liquid displaced by that object
Constant to overcome the heat of fusion (solid to liquid state)
The particle's charge and the magnitude of the electric field

28. Always remember that velocity has ____ and ____
W = F(displacement)
[A]^a[B]^b
One mole of electric charge
Mag and direction

29. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Ability to locate an event in space
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
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
NO; reduction-oxidation

30. 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?
The element's mass number
Energy
The density of the water and volume of the lead object
Vertically; perpendicular to all surfaces

31. 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
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Gravity

32. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Where an event took place
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
P = F(v) = mg(v -terminal)
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

33. The concentration of OH and H30 ions are approximately equal at what pH?
7 always!!!
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
Half of the exponent
The buoyant force on it; W = mg = pVg

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

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35. What kind of geometry is octahedral?
0 Hz because they are traveling side by side at the same speed
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
Electron shell number
When you have central atom with six ions on it

36. If you have circuit elements in parallel what is the same across them?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Voltage

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

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38. What is the doppler equation for wavelength and frequency?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Electrons from anode and battery
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

39. Kb is the equilibrium constant for 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
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 reaction between the base and water
Gravity

40. What is the spin projection quantum number?
Faraday/electrons
+/- 1/2
Decreasing potential energy
External components of the circuit

41. If asked which electron configuration of an element is most stable which one do you choose?
Positron because this is known as positron decay/electron capture
The regular one
It has a positive oxidation potential so it is easily oxidized
It decreases; the work done by the gas in expanding decreases its internal energy

42. 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 nucleus gains a proton and no neutrons
The buoyant force on it; W = mg = pVg
(+)
Momentum

43. How do you find moles of a substance when you are given faradays and electrons?
T = (2h/g)^1/2; distance = vt
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The regular one
Faraday/electrons

44. How do you find length of time something is in flight? How do you find distance it traveled?
That they are catalysts in the rxn because they react with the substrate and are reformed
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
One that has more solute particles per liter of solution
T = (2h/g)^1/2; distance = vt

45. What is the unit for Young's Modulus?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Pascal (N*m^2)
Its twice that distance

46. Why does light travel slower in an optically dense medium than through a vacuum?
A saturated solution in which the aqueous ions are in equilibrium with the solid
7 always!!!
Red
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

47. Strength of dispersion force increases with what?
The element's mass number
P = IV
H has a small atomic radius
Ease of polarizability of the molecule and thus increasing molecular weight of mass

48. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Add them together
Sp^3
They do not differ
Polar

49. Isotopes have diff number of ______ but same what?
Voltage
Neutrons; atomic number
The regular one
Alkali metals = first column

50. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
They must balance
Vertically; perpendicular to all surfaces
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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