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. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
3+
Helium; 4
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

2. The total pressure of a solution is what? Give example.
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
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
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 cmpd without the O cannot donate H's like alcohol can to form H bonds with water

3. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
Voltage
[S][2S]^2 = 4S^3
Add them together
It's weight = mg; h

4. In a rxn - how do you figure out which atom has the highest electron affinity?
Faraday/electrons
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The regular one
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

5. The boiling point of a solution is what type of property? Which means is depends only on what?
When electron falls from high energy to low energy level
Colligative; the number of solute particles present
-l to +l
Gravity

6. How do you figure out the literature Ksp value of a compound?
Negative
A saturated solution in which the aqueous ions are in equilibrium with the solid
Strong acid and strong base/ weak acid and weak base
Mass number stays the same but the atomic number increases

7. The basicity constant Kb measures what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Mg
In the presence of a base
How strong a base is

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

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

9. What is sublimation?
Going from solid to gas phase
Positron because this is known as positron decay/electron capture
They are directly proportional
The volume of the ice cube or whatever it is

10. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The cross-sectional area through which the fluid flows
H has a small atomic radius

11. Beta decay is the same as what?
Positron emission
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
How strong a base is
L = wavelength/2 so L= (wavelength)(2)

12. How do you find wavelength if you known distance from adjacent crests and troughs?
That of static friction; there is a net accelerating force on the block once it starts to slide
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Its twice that distance
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

13. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
The lowest one
It can absorb light that lets other electrons fill those orbitals

14. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
Electron shell number
T = 2pi/angular velocity; v/r
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 can absorb light that lets other electrons fill those orbitals

15. The probability of an X-ray emission event at a given wavelength is measured by what?
An odd number
Electron shell number
Its intensity in the spectrum
It decreases; the work done by the gas in expanding decreases its internal energy

16. When a falling mass is at terminal speed - what is the power expended by the air resistance?
H has a small atomic radius
Force times the distance over which the force acts
P = F(v) = mg(v -terminal)
That of static friction; there is a net accelerating force on the block once it starts to slide

17. What is weight equal to?
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
Zero
Mg
Isolating an atom from minerals by decomposing the minerals with an electric current

18. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
T = 2pi/angular velocity; v/r
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
Mass number stays the same but the atomic number increases

19. What is Avagadro's number regarding ions/mol?
It's weight = mg; h
The volume of the ice cube or whatever it is
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
6.02 x 10^23 ions/mol

20. In PV=nRT - if temp increases what will happen to volume?
It will increase as well because they are directly related - only if pressure is kept constant
When electron falls from high energy to low energy level
In the presence of a base
Neutrons; atomic number

21. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
You look at what is being oxidized and reduced in the problem
3+
Sp^3
Energy

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

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

23. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
V/m or N/C
Vertically; perpendicular to all surfaces
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

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

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

25. What energy conversion describes best what takes place in a battery-powered resistive circuit?
That of static friction; there is a net accelerating force on the block once it starts to slide
How strong a base is
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

26. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
That they are catalysts in the rxn because they react with the substrate and are reformed
That it is negative
[S][2S]^2 = 4S^3
From peak to peak

27. The free energy change (G) must be negative when what?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
H = negative and S = positive
It will be reduced the voltage produced by the resistor which means IR; E- IR

28. The volume of an object is equal to water?
That of static friction; there is a net accelerating force on the block once it starts to slide
Liquid displaced by that object
Pascal (N*m^2)
Red

29. What if the circuit elements are in series?
(+)
The current is the same
The lowest whole number ratio of moles of each element in a mole of a cmpd
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

30. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
H = negative and S = positive
They do not differ
It's weight = mg; the work would be the weight times the distance fell
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. Melting occurs at what type of temperature? Why?
E = (kq)/r^2
Mag and direction
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
Constant to overcome the heat of fusion (solid to liquid state)

32. When an element decreases its atomic number by one what is emitted?
The particle's charge and the magnitude of the electric field
Positron because this is known as positron decay/electron capture
The buoyant force on it; W = mg = pVg
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

33. What is one faraday equal to?
One mole of electric charge
Pascal (N*m^2)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
6.02 x 10^23 ions/mol

34. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
W = F(displacement)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

35. Isotopes have diff number of ______ but same what?
Electron shell number
A saturated solution in which the aqueous ions are in equilibrium with the solid
Neutrons; atomic number
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

36. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
P = F(v) = mg(v -terminal)
Add them together
(+)
Only temperature of the water bath

37. 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?
Energy
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Polar
When electron falls from high energy to low energy level

38. What direction do gravity and bouyancy work? What direction does water pressure work?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Vertically; perpendicular to all surfaces
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
H has a small atomic radius

39. A floating ice cube implies that it's weight is balanced by what?
When electron falls from high energy to low energy level
The buoyant force on it; W = mg = pVg
The density of the water and volume of the lead object
No - it increases the speed at which the rxn reaches that equilibrium

40. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Energy
It can absorb light that lets other electrons fill those orbitals
That of static friction; there is a net accelerating force on the block once it starts to slide
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

41. The square root of 10^anything is equal to what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The volume of the ice cube or whatever it is
Half of the exponent
Add them together

42. What is the formula for the power supplied by a battery to accelerate an electron beam?
The number of electrons emitted
Density (gravitational constant) height
When HIn is turned into In- - which is dependent upon the pKa of the indicator
P = IV

43. 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

44. When is a body in translational equilibrium?
When all the external forces = zero
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
Negative
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

45. What is the relationship between P and n in PV=nRT?
They are directly proportional
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
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
Where an event took place

46. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
Yes - if the particle's trail is equidistant between two adjacent anodes
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

47. 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 density of the water and volume of the lead object
(density[p])(volume)
A constant force on a mass causes it to have a constant acceleration
Faraday/electrons

48. In Bohr model of atom when is energy emitted?
A constant force on a mass causes it to have a constant acceleration
Vertically; perpendicular to all surfaces
When electron falls from high energy to low energy level
Positive

49. In order to increase the kinetic energy of electrons - they must be what?
Liquid displaced by that object
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Accelerated by a higher voltage between the cathode and anode

50. When you are trying to calculate a galvanic cell's emf - what do you look at?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
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 what is being oxidized and reduced in the problem