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 kind of charge is on Al?
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
Polar
Positron because this is known as positron decay/electron capture
3+

2. The free energy change (G) must be negative when what?
They are directly proportional
H = negative and S = positive
It has a positive oxidation potential so it is easily oxidized
They increase because you hear a lower frequency

3. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Going from solid to gas phase
Attractive molecular forces acting between material surfaces in contact
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Positron emission

4. How do you find wavelength if you known distance from adjacent crests and troughs?
Mv = mv
Its twice that distance
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
Isolating an atom from minerals by decomposing the minerals with an electric current

5. The coefficient of kinetic friction is always lower than what? Therefore what?
That of static friction; there is a net accelerating force on the block once it starts to slide
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
F =ma and F= qE
P = F(v) = mg(v -terminal)

6. 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
Constant to overcome the heat of fusion (solid to liquid state)
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The lowest whole number ratio of moles of each element in a mole of a cmpd

7. What is weight equal to?
That of static friction; there is a net accelerating force on the block once it starts to slide
Mg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
The reaction between the base and water

8. 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
It's weight = mg; the work would be the weight times the distance fell
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

9. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
T = (2h/g)^1/2; distance = vt
[A]^a[B]^b
Negative
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

10. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
They do not differ
[S][2S]^2 = 4S^3
Alkali metals = first column
It decreases; the work done by the gas in expanding decreases its internal energy

11. What is the formula for the power supplied by a battery to accelerate an electron beam?
The reaction between the base and water
E = (kq)/r^2
P = IV
B = pVg; density

12. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Mag and direction
[S][2S]^2 = 4S^3
Polar

13. How do you find moles of a substance when you are given faradays and electrons?
Faraday/electrons
T = 2pi/angular velocity; v/r
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
An odd number

14. If both weight and bouyant force are dependent on g - that makes g independent of what?
The lowest one
The volume of the ice cube or whatever it is
Electron shell number
Density (gravitational constant) height

15. The Ksp for a substance of AaBb is what?
It's weight = mg; h
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
[A]^a[B]^b
Half of the exponent

16. 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?
A constant force on a mass causes it to have a constant acceleration
The element's mass number
It will be reduced the voltage produced by the resistor which means IR; E- IR
Total internal reflection

17. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
H = negative and S = positive
It can also equal 'mg'; the compressive strength of a substance
Half of the exponent

18. The total pressure of a solution is what? Give example.
Energy
The element's mass number
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 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

19. What direction do gravity and bouyancy work? What direction does water pressure work?
How strong a base is
Liquid displaced by that object
Going from solid to gas phase
Vertically; perpendicular to all surfaces

20. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
In the presence of a base
They do not differ
The volume of the ice cube or whatever it is
3+

21. 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?
Electrons from anode and battery
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Liquid displaced by that object
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

22. In a rxn - how do you figure out which atom has the highest electron affinity?
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
V/m or N/C
0 Hz because they are traveling side by side at the same speed
Mg

23. Is the work done by air resistance - positive or negative?
It has a positive oxidation potential so it is easily oxidized
Mg
Negative
Positive

24. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
The lowest whole number ratio of moles of each element in a mole of a cmpd
Helium; 4
Mv = mv
Its intensity in the spectrum

25. 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

26. 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

27. 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?
One mole of electric charge
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
It will increase as well because they are directly related - only if pressure is kept constant
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

28. What is usually conserved over oscillation periods?
Energy
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Isolating an atom from minerals by decomposing the minerals with an electric current
One that has more solute particles per liter of solution

29. Why are bonds between H and another atom shorter compared to most?
H has a small atomic radius
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Half of the exponent
H = negative and S = positive

30. Friction is caused by what?
Voltage
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
+/- 1/2
Attractive molecular forces acting between material surfaces in contact

31. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Liquid displaced by that object
Going from solid to gas phase
The particle's charge and the magnitude of the electric field

32. What do electrolytic techniques involve?
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
Isolating an atom from minerals by decomposing the minerals with an electric current
0 Hz because they are traveling side by side at the same speed
[A]^a[B]^b

33. How do you find specific gravity of an object?
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
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

34. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
The element's mass number
Helium; 4
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Only temperature of the water bath

35. The probability of an X-ray emission event at a given wavelength is measured by what?
Its intensity in the spectrum
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
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
Constant to overcome the heat of fusion (solid to liquid state)

36. What is the equation for a period (T)? What is the equation for angular velocity?
The number of electrons emitted
T = 2pi/angular velocity; v/r
Colligative: it depends on the number of solute molecules in a given volume of water
It will be reduced the voltage produced by the resistor which means IR; E- IR

37. If you are given density and volume how do you find mass?
(density[p])(volume)
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
From peak to peak
The current is the same

38. What is the spin projection quantum number?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Total internal reflection
180 degrees; when there is half a wave distance in phase between two waves
+/- 1/2

39. What is the unit for Young's Modulus?
How strong a base is
0 Hz because they are traveling side by side at the same speed
The reaction between the base and water
Pascal (N*m^2)

40. F in the Young's modulus equation can also equal what? What is E?

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

41. The volume of an object is equal to water?
Colligative; the number of solute particles present
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Liquid displaced by that object
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

42. Heat from friction comes from what?
Decreasing potential energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It will increase as well because they are directly related - only if pressure is kept constant
Force times the distance over which the force acts

43. The coefficient of static friction is the ratio of what?
The force along the board to the normal force
Negative
An odd number
The cross-sectional area through which the fluid flows

44. In Bohr model of atom when is energy emitted?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
F =ma and F= qE
When electron falls from high energy to low energy level

45. Why does light travel slower in an optically dense medium than through a vacuum?
Polar
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Zero
0 Hz because they are traveling side by side at the same speed

46. For a given flow rate - the speed of fluid flow is inversely proportional to what?
The cross-sectional area through which the fluid flows
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
W = F(displacement)
The particle's charge and the magnitude of the electric field

47. What color is above 656 nm?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Red
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

48. 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

49. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
Negative
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Add them together

50. Neither N2 or O2 have a permanent what? What does this mean?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
One that has more solute particles per liter of solution
T = 2pi/angular velocity; v/r
The number of electrons emitted