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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?
They must balance
It can also equal 'mg'; the compressive strength of a substance
One mole of electric charge
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

2. Beta decay is the emission of what? How do you know what it is the emission of?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Zero
A positron or electron; when atomic number goes up you know an electron has been emitted
Going from solid to gas phase

3. How should the period of a waveform be calculated?
The force along the board to the normal force
Gravity
From peak to peak
[A]^a[B]^b

4. What is the principal quantum number (n)?
One mole of electric charge
An odd number
Where an event took place
Electron shell number

5. What is the doppler equation for wavelength and frequency?
Colligative; the number of solute particles present
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
-l to +l
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

6. What is newton's second law?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
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
A constant force on a mass causes it to have a constant acceleration
Helium; 4

7. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
400 to 700 nm
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)
Accelerated by a higher voltage between the cathode and anode

8. Why does light travel slower in an optically dense medium than through a vacuum?
In the presence of a base
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
A constant force on a mass causes it to have a constant acceleration
Density (gravitational constant) height

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

10. Neither N2 or O2 have a permanent what? What does this mean?
Momentum
When electron falls from high energy to low energy level
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

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

12. If you have circuit elements in parallel what is the same across them?
Alkali metals = first column
Voltage
Ability to locate an event in space
It's weight = mg; h

13. Friction is caused by what?
It's weight = mg; the work would be the weight times the distance fell
Attractive molecular forces acting between material surfaces in contact
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

14. What is the magnetic quantum number?
(+)
-l to +l
The volume of the ice cube or whatever it is
Electrons from anode and battery

15. The number of incident photons on the cathode affect what?
(density[p])(volume)
When electron falls from high energy to low energy level
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 number of electrons emitted

16. The force on an electrical charge is what?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
F =ma and F= qE
-l to +l
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

17. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The cross-sectional area through which the fluid flows
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 Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

18. What would the force be of a block on a pulley? What would be its displacement?

19. What is the law of conservation of linear momentum?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
How strong a base is
Sp^3
Mv = mv

20. 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
NO; reduction-oxidation
H has a small atomic radius
In the presence of a base

21. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
When all the external forces = zero
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
-l to +l
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

22. What is conserved in an inellastic collision?
W = F(displacement)
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Momentum
F = GMm/r^2

23. How do you find length of time something is in flight? How do you find distance it traveled?
When all the external forces = zero
No - it increases the speed at which the rxn reaches that equilibrium
Faraday/electrons
T = (2h/g)^1/2; distance = vt

24. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Isolating an atom from minerals by decomposing the minerals with an electric current
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Ability to locate an event in space
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

25. If the standard potential for a rxn is negative when it is being reduced (thus a negative reduction potential) that means that the resulting atom has what?
Cathode; anode
It decreases; the work done by the gas in expanding decreases its internal energy
It has a positive oxidation potential so it is easily oxidized
Attractive molecular forces acting between material surfaces in contact

26. What does spatial resolution refer to?
Electron shell number
Add them together
Ability to locate an event in space
When electron falls from high energy to low energy level

27. How many mL is in one liter?
It will be reduced the voltage produced by the resistor which means IR; E- IR
Cathode; anode
1000
NO; reduction-oxidation

28. How do you find wavelength if you known distance from adjacent crests and troughs?
Its twice that distance
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
6.02 x 10^23 ions/mol
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

29. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
Pascal (N*m^2)
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

30. Is the work done by air resistance - positive or negative?
+/- 1/2
Polar
0 Hz because they are traveling side by side at the same speed
Negative

31. The volume of an object is equal to water?
Cathode; anode
Liquid displaced by that object
It can absorb light that lets other electrons fill those orbitals
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

32. What kind of metals react violently with water?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Only temperature of the water bath
Alkali metals = first column
One mole of electric charge

33. In a rxn - how do you figure out which atom has the highest electron affinity?
They do not differ
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
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
That it is negative

34. What is usually conserved over oscillation periods?
(density[p])(volume)
The lowest one
Energy
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

35. 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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Negative
Ease of polarizability of the molecule and thus increasing molecular weight of mass

36. In Bohr model of atom when is energy emitted?
Vertically; perpendicular to all surfaces
In the presence of a base
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
When electron falls from high energy to low energy level

37. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
Red
6.02 x 10^23 ions/mol
Gravity

38. What is the equation for bouyant force? What is p?
-l to +l
H has a small atomic radius
B = pVg; density
That of static friction; there is a net accelerating force on the block once it starts to slide

39. In order to increase the kinetic energy of electrons - they must be what?
The buoyant force on it; W = mg = pVg
T = (2h/g)^1/2; distance = vt
Accelerated by a higher voltage between the cathode and anode
One that has more solute particles per liter of solution

40. The coefficient of kinetic friction is always lower than what? Therefore what?
E = (kq)/r^2
That of static friction; there is a net accelerating force on the block once it starts to slide
External components of the circuit
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

41. A plane mirror produces an image where?
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
Liquid displaced by that object
At an equal distance behind it as the object is in front of the mirror
Positron because this is known as positron decay/electron capture

42. What does the empirical formula show?
A salt and water
You look at what is being oxidized and reduced in the problem
The lowest whole number ratio of moles of each element in a mole of a cmpd
(+)

43. What direction do gravity and bouyancy work? What direction does water pressure work?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Vertically; perpendicular to all surfaces
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

44. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Mass number stays the same but the atomic number increases
When electron falls from high energy to low energy level
NO; reduction-oxidation
1000

45. What are the units of an electric field?
A salt and water
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
V/m or N/C
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

46. 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?
That it is negative
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
A salt and water

47. A floating ice cube implies that it's weight is balanced by what?
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
The buoyant force on it; W = mg = pVg
Constant to overcome the heat of fusion (solid to liquid state)
The density of the water and volume of the lead object

48. What is the equation for pressure?
Attractive molecular forces acting between material surfaces in contact
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 buoyant force on it; W = mg = pVg
Density (gravitational constant) height

49. The electrons emitted from cathode are replaced with what?
Colligative: it depends on the number of solute molecules in a given volume of water
Electrons from anode and battery
The nucleus gains a proton and no neutrons
T = 2pi/angular velocity; v/r

50. What is the spin projection quantum number?
Vertically; perpendicular to all surfaces
+/- 1/2
It will increase as well because they are directly related - only if pressure is kept constant
One mole of electric charge