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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. How do you find specific gravity of an object?
Red
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Only temperature of the water bath

2. What is Newton's Universal Law of Gravitation?
Momentum
180 degrees; when there is half a wave distance in phase between two waves
That of static friction; there is a net accelerating force on the block once it starts to slide
F = GMm/r^2

3. How should the period of a waveform be calculated?
Positron emission
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
+/- 1/2

4. When does red litmus paper turn blue?
3+
In the presence of a base
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
Mv = mv

5. In Bohr model of atom when is energy emitted?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Pascal (N*m^2)
When electron falls from high energy to low energy level
A salt and water

6. The visible spectrum ranges from ____ to _____
6.02 x 10^23 ions/mol
Constant to overcome the heat of fusion (solid to liquid state)
400 to 700 nm
Polar

7. What is the unit for Young's Modulus?
E = (kq)/r^2
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Pascal (N*m^2)

8. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
They are directly proportional
1000
Ease of polarizability of the molecule and thus increasing molecular weight of mass

9. Hydrogen has what kind of standard oxidation or reduction potential?
Faraday/electrons
The force along the board to the normal force
Zero
0 Hz because they are traveling side by side at the same speed

10. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
The regular one
When you have central atom with six ions on it
Energy

11. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The element's mass number
Colligative: it depends on the number of solute molecules in a given volume of water
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

12. What energy conversion describes best what takes place in a battery-powered resistive circuit?
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)
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
NO; reduction-oxidation

13. What happens to a negatively charged particle put between two parallel plates?
It's weight = mg; h
Colligative: it depends on the number of solute molecules in a given volume of water
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Faraday/electrons

14. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
The density of the water and volume of the lead object

15. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Cathode; anode
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
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

16. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
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
Pascal (N*m^2)

17. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Colligative: it depends on the number of solute molecules in a given volume of water

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

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19. In PV=nRT - if temp increases what will happen to volume?
In the presence of a base
Accelerated by a higher voltage between the cathode and anode
F =ma and F= qE
It will increase as well because they are directly related - only if pressure is kept constant

20. What is different between an inclined plane and free fall?
Mv = mv
Colligative; the number of solute particles present
The path is longer on the inclined plane so it will take object longer to reach the bottom
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

21. What is the magnitude of the electric field produced by a point charge?
Red
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
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
E = (kq)/r^2

22. The force on an electrical charge is what?
F =ma and F= qE
Decreasing potential energy
It has a positive oxidation potential so it is easily oxidized
It will increase as well because they are directly related - only if pressure is kept constant

23. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Electron shell number
180 degrees; when there is half a wave distance in phase between two waves
An odd number
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

24. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Its twice that distance
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Helium; 4
The force along the board to the normal force

25. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
F = GMm/r^2
When you have central atom with six ions on it
P = IV

26. What is usually conserved over oscillation periods?
Energy
The nucleus gains a proton and no neutrons
Decreasing potential energy
400 to 700 nm

27. Half-sine wave shape is what kind of wavelength with regards to length?
The reaction between the base and water
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
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)
L = wavelength/2 so L= (wavelength)(2)

28. What is the relationship between P and n in PV=nRT?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Half of the exponent
They are directly proportional
F =ma and F= qE

29. 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 current is the same
Its twice that distance
Mg

30. 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?
Red
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
+/- 1/2
F = GMm/r^2

31. The basicity constant Kb measures what?
External components of the circuit
Strong acid and strong base/ weak acid and weak base
A saturated solution in which the aqueous ions are in equilibrium with the solid
How strong a base is

32. Equivalent mass is what?
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
That they are catalysts in the rxn because they react with the substrate and are reformed
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)

33. Neither N2 or O2 have a permanent what? What does this mean?
Density (gravitational constant) height
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Helium; 4
The lowest whole number ratio of moles of each element in a mole of a cmpd

34. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Where an event took place
The buoyant force on it; W = mg = pVg
0 Hz because they are traveling side by side at the same speed

35. The coefficient of kinetic friction is always lower than what? Therefore what?
Attractive molecular forces acting between material surfaces in contact
Sp^3
That of static friction; there is a net accelerating force on the block once it starts to slide
(+)

36. What is newton's second law?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
3+
A constant force on a mass causes it to have a constant acceleration
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

37. What type of acid and base would produce a pH closest to 7?
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
Strong acid and strong base/ weak acid and weak base
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 number of electrons emitted

38. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

39. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
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
They increase because you hear a lower frequency
NO; reduction-oxidation
(+)

40. How do you find 'g' from Newton's law of gravity?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Sp^3
+/- 1/2
The element's mass number

41. When a falling mass is at terminal speed - what is the power expended by the air resistance?
Colligative: it depends on the number of solute molecules in a given volume of water
Where an event took place
Isolating an atom from minerals by decomposing the minerals with an electric current
P = F(v) = mg(v -terminal)

42. What is the spin projection quantum number?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
An odd number
+/- 1/2
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)

43. The electrons emitted from cathode are replaced with what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Electrons from anode and battery
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)

44. Why are bonds between H and another atom shorter compared to most?
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)
H has a small atomic radius
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
T = (2h/g)^1/2; distance = vt

45. Friction is caused by what?
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
P = IV
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
Attractive molecular forces acting between material surfaces in contact

46. A nearsighted person has what type of focal length? Thus what do we do to correct this?
The particle's charge and the magnitude of the electric field
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The nucleus gains a proton and no neutrons

47. What is the principal quantum number (n)?
Positive
You look at what is being oxidized and reduced in the problem
The nucleus gains a proton and no neutrons
Electron shell number

48. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
Constant to overcome the heat of fusion (solid to liquid state)
That they are catalysts in the rxn because they react with the substrate and are reformed
Strong acid and strong base/ weak acid and weak base
Momentum

49. The total pressure of a solution is what? Give example.
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
400 to 700 nm
It will be reduced the voltage produced by the resistor which means IR; E- IR
Total internal reflection

50. What is sublimation?
Going from solid to gas phase
T = (2h/g)^1/2; distance = vt
[S][2S]^2 = 4S^3
Yes - if the particle's trail is equidistant between two adjacent anodes