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. The force on an electrical charge is what?
F =ma and F= qE
Positron because this is known as positron decay/electron capture
The current is the same
A positron or electron; when atomic number goes up you know an electron has been emitted

2. How do you find 'g' from Newton's law of gravity?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Constant to overcome the heat of fusion (solid to liquid state)

3. What is the magnetic quantum number?
When electron falls from high energy to low energy level
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
-l to +l
It will be reduced the voltage produced by the resistor which means IR; E- IR

4. The free energy change (G) must be negative when what?
H has a small atomic radius
H = negative and S = positive
Strong acid and strong base/ weak acid and weak base
Yes - if the particle's trail is equidistant between two adjacent anodes

5. When a falling mass is at terminal speed - what is the power expended by the air resistance?
They must balance
That of static friction; there is a net accelerating force on the block once it starts to slide
P = F(v) = mg(v -terminal)
Yes - if the particle's trail is equidistant between two adjacent anodes

6. Always remember that velocity has ____ and ____
Ease of polarizability of the molecule and thus increasing molecular weight of mass
In the presence of a base
Mag and direction
0 Hz because they are traveling side by side at the same speed

7. What is the law of conservation of linear momentum?
Its intensity in the spectrum
When electron falls from high energy to low energy level
Constant to overcome the heat of fusion (solid to liquid state)
Mv = mv

8. What is weight equal to?
The reaction between the base and water
(density[p])(volume)
T = 2pi/angular velocity; v/r
Mg

9. How do you figure out the literature Ksp value of a compound?
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
A saturated solution in which the aqueous ions are in equilibrium with the solid

10. 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
Positron because this is known as positron decay/electron capture
Force times the distance over which the force acts
Gravity

11. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Yes - if the particle's trail is equidistant between two adjacent anodes
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
[S][2S]^2 = 4S^3
Decreasing potential energy

12. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
400 to 700 nm
A saturated solution in which the aqueous ions are in equilibrium with the solid
[S][2S]^2 = 4S^3
That it is negative

13. 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?
It has a positive oxidation potential so it is easily oxidized
(+)
One that has more solute particles per liter of solution
When all the external forces = zero

14. A floating ice cube implies that it's weight is balanced by what?
When you have central atom with six ions on it
Positive
It will increase as well because they are directly related - only if pressure is kept constant
The buoyant force on it; W = mg = pVg

15. 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
Polar
The lowest whole number ratio of moles of each element in a mole of a cmpd
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

16. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
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
NO; reduction-oxidation
Liquid displaced by that object
The current is the same

17. If temperature arises during a mixture what can you conclude about the enthalpy?
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
Constant to overcome the heat of fusion (solid to liquid state)
That it is negative
At an equal distance behind it as the object is in front of the mirror

18. 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?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Isolating an atom from minerals by decomposing the minerals with an electric current
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

19. What direction do gravity and bouyancy work? What direction does water pressure work?
A positron or electron; when atomic number goes up you know an electron has been emitted
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Vertically; perpendicular to all surfaces

20. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
It has a positive oxidation potential so it is easily oxidized
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
A salt and water
Helium; 4

21. How would you find rate of rxn from pH 1 to pH2?
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
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
It's weight = mg; h
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

22. The number of incident photons on the cathode affect what?
The lowest one
The number of electrons emitted
Negative
Vertically; perpendicular to all surfaces

23. Can a catalyst shift equilibrium?
It will increase as well because they are directly related - only if pressure is kept constant
No - it increases the speed at which the rxn reaches that equilibrium
Its momentum is zero because velocity is zero; zero because of conservation of momentum
When electron falls from high energy to low energy level

24. 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
[S][2S]^2 = 4S^3
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
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)

25. When an element decreases its atomic number by one what is emitted?
-l to +l
Add them together
Positron because this is known as positron decay/electron capture
Faraday/electrons

26. When does red litmus paper turn blue?
Sp^3
That of static friction; there is a net accelerating force on the block once it starts to slide
In the presence of a base
It can also equal 'mg'; the compressive strength of a substance

27. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Positive
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It can also equal 'mg'; the compressive strength of a substance

28. The basicity constant Kb measures what?
Yes - if the particle's trail is equidistant between two adjacent anodes
How strong a base is
Faraday/electrons
P = F(v) = mg(v -terminal)

29. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
The buoyant force on it; W = mg = pVg
Pascal (N*m^2)
Its momentum is zero because velocity is zero; zero because of conservation of momentum

30. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
The particle's charge and the magnitude of the electric field
Positron emission
It can also equal 'mg'; the compressive strength of a substance

31. The temperature of a metal will not increase above its melting point until what?
B = pVg; density
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Going from solid to gas phase
T = (2h/g)^1/2; distance = vt

32. What is conserved in an inellastic collision?
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 nucleus gains a proton and no neutrons
Momentum
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

33. How do you find moles of a substance when you are given faradays and electrons?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Faraday/electrons
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
Cathode; anode

34. When is a body in translational equilibrium?
They increase because you hear a lower frequency
It decreases; the work done by the gas in expanding decreases its internal energy
When all the external forces = zero
Going from solid to gas phase

35. In radioactive decay the atomic number (A) and mass number (Z) must what?
(density[p])(volume)
They must balance
Its twice that distance
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

36. The electrons emitted from cathode are replaced with what?
Half of the exponent
Liquid displaced by that object
Negative
Electrons from anode and battery

37. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
A constant force on a mass causes it to have a constant acceleration
The lowest whole number ratio of moles of each element in a mole of a cmpd
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

38. Light can be carried along a distance within a transparent material by means of what?
Momentum
Positron because this is known as positron decay/electron capture
0 Hz because they are traveling side by side at the same speed
Total internal reflection

39. What kind of metals react violently with water?
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
The reaction between the base and water
Alkali metals = first column
A saturated solution in which the aqueous ions are in equilibrium with the solid

40. Mechanical waves in a medium fxn to transport what?
The particle's charge and the magnitude of the electric field
Energy
Red
It can also equal 'mg'; the compressive strength of a substance

41. 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
Alkali metals = first column
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Energy

42. Strength of dispersion force increases with what?
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
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Momentum
A salt and water

43. Acetic acid is a ______ solvent
Cathode; anode
A constant force on a mass causes it to have a constant acceleration
Polar
Density (gravitational constant) height

44. 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

45. 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?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
T = (2h/g)^1/2; distance = vt
Momentum
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

46. What is the equation for pressure?
A positron or electron; when atomic number goes up you know an electron has been emitted
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Density (gravitational constant) height
It can absorb light that lets other electrons fill those orbitals

47. Kb is the equilibrium constant for what?
The reaction between the base and water
The path is longer on the inclined plane so it will take object longer to reach the bottom
Gravity
The lowest one

48. In general what is formed by an acid-base rxn?
H has a small atomic radius
Zero
The buoyant force on it; W = mg = pVg
A salt and water

49. What if the circuit elements are in series?
Helium; 4
The current is the same
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Only temperature of the water bath

50. 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
F = GMm/r^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)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2