Test your basic knowledge |

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 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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
NO; reduction-oxidation
The regular one

2. The square root of 10^anything is equal to what?
Polar
Half of the exponent
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

3. The visible spectrum ranges from ____ to _____
You look at what is being oxidized and reduced in the problem
V/m or N/C
400 to 700 nm
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

4. In order to guarantee a non-zero spin how many electrons are needed?
Strong acid and strong base/ weak acid and weak base
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)
Pascal (N*m^2)
An odd number

5. What does the empirical formula show?
The lowest whole number ratio of moles of each element in a mole of a cmpd
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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)
(density[p])(volume)

6. Equivalent mass is what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It decreases; the work done by the gas in expanding decreases its internal energy
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
NO; reduction-oxidation

7. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
The current is the same
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 cross-sectional area through which the fluid flows
That it is negative

8. What is the equation for bouyant force? What is p?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Electron shell number
B = pVg; density

9. What is the formula for the power supplied by a battery to accelerate an electron beam?
No - it increases the speed at which the rxn reaches that equilibrium
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
P = IV
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

10. Terminal voltage is provided to what?
The buoyant force on it; W = mg = pVg
External components of the circuit
They do not differ
Half of the exponent

11. Friction is caused by what?
Attractive molecular forces acting between material surfaces in contact
They increase because you hear a lower frequency
Mv = mv
Going from solid to gas phase

12. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
0 Hz because they are traveling side by side at the same speed
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
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
V/m or N/C

13. Hydrogen has what kind of standard oxidation or reduction potential?
One mole of electric charge
They increase because you hear a lower frequency
Going from solid to gas phase
Zero

14. Acetic acid is a ______ solvent
It's weight = mg; h
That they are catalysts in the rxn because they react with the substrate and are reformed
Polar
Momentum

15. Neither N2 or O2 have a permanent what? What does this mean?
The number of electrons emitted
Constant to overcome the heat of fusion (solid to liquid state)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
T = 2pi/angular velocity; v/r

16. 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?
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
Voltage
Its momentum is zero because velocity is zero; zero because of conservation of momentum

17. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Sp^3
Negative
Where an event took place
Electron shell number

18. Beta decay is the same as what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Positron emission
Its intensity in the spectrum
Neutrons; atomic number

19. Nuclear masses can be approximated from what?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

20. The number of incident photons on the cathode affect what?
Where an event took place
One that has more solute particles per liter of solution
Energy
The number of electrons emitted

21. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
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
Helium; 4
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The force along the board to the normal force

22. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
B = pVg; density
One mole of electric charge
(+)

23. How do you balance redox rxns?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

24. What is the amt of energy that a frictional force generates?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
T = (2h/g)^1/2; distance = vt
Vertically; perpendicular to all surfaces
Force times the distance over which the force acts

25. What is the law of conservation of linear momentum?
Total internal reflection
Mv = mv
NO; reduction-oxidation
Mag and direction

26. A floating ice cube implies that it's weight is balanced by what?
The buoyant force on it; W = mg = pVg
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Its intensity in the spectrum
A positron or electron; when atomic number goes up you know an electron has been emitted

27. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
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
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The density of the water and volume of the lead object
180 degrees; when there is half a wave distance in phase between two waves

28. How should the period of a waveform be calculated?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Mv = mv
From peak to peak
Zero

29. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
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
Gravity
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

30. The basicity constant Kb measures what?
How strong a base is
Red
The cross-sectional area through which the fluid flows
Going from solid to gas phase

31. The freezing point of an aqueous solution is what kind of property? What does this mean?
Going from solid to gas phase
180 degrees; when there is half a wave distance in phase between two waves
The cross-sectional area through which the fluid flows
Colligative: it depends on the number of solute molecules in a given volume of water

32. The free energy change (G) must be negative when what?
It can absorb light that lets other electrons fill those orbitals
H = negative and S = positive
Positron emission
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

33. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
NO; reduction-oxidation
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The volume of the ice cube or whatever it is
Mag and direction

34. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
It's weight = mg; h
A constant force on a mass causes it to have a constant acceleration

35. Isotopes have diff number of ______ but same what?
Yes - if the particle's trail is equidistant between two adjacent anodes
Neutrons; atomic number
The reaction between the base and water
A constant force on a mass causes it to have a constant acceleration

36. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Ability to locate an event in space
Cathode; anode
The lowest one

37. Heat from friction comes from what?
The lowest whole number ratio of moles of each element in a mole of a cmpd
The lowest one
Decreasing potential energy
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

38. When you are trying to calculate a galvanic cell's emf - what do you look at?
You look at what is being oxidized and reduced in the problem
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
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)
A saturated solution in which the aqueous ions are in equilibrium with the solid

39. 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
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Electrons from anode and battery
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

40. 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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
That of static friction; there is a net accelerating force on the block once it starts to slide
Sp^3

41. What is the equation for work done?
The number of electrons emitted
W = F(displacement)
Gravity
The force along the board to the normal force

42. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
H has a small atomic radius
That they are catalysts in the rxn because they react with the substrate and are reformed
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
One that has more solute particles per liter of solution

43. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
The number of electrons emitted
It will be reduced the voltage produced by the resistor which means IR; E- IR
That they are catalysts in the rxn because they react with the substrate and are reformed

44. What is the magnitude of the electric field produced by a point charge?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
They are directly proportional
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
E = (kq)/r^2

45. The total pressure of a solution is what? Give example.
The cross-sectional area through which the fluid flows
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
The current is the same
Momentum

46. 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?
They must balance
T = 2pi/angular velocity; v/r
Ease of polarizability of the molecule and thus increasing molecular weight of mass
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

47. Mechanical waves in a medium fxn to transport what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Energy
One mole of electric charge
180 degrees; when there is half a wave distance in phase between two waves

48. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
The nucleus gains a proton and no neutrons
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Momentum

49. The coefficient of static friction is the ratio of what?
+/- 1/2
The current is the same
The force along the board to the normal force
B = pVg; density

50. The probability of an X-ray emission event at a given wavelength is measured by what?
It's weight = mg; the work would be the weight times the distance fell
[A]^a[B]^b
The cross-sectional area through which the fluid flows
Its intensity in the spectrum