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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 is the formula for the power supplied by a battery to accelerate an electron beam?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
P = IV
The lowest whole number ratio of moles of each element in a mole of a cmpd

2. What is a metathesis rxn?
Decreasing potential energy
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
Accelerated by a higher voltage between the cathode and anode
(density[p])(volume)

3. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Strong acid and strong base/ weak acid and weak base
Gravity
The volume of the ice cube or whatever it is
It decreases; the work done by the gas in expanding decreases its internal energy

4. In a rxn - how do you figure out which atom has the highest electron affinity?
The density of the water and volume of the lead object
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 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 current is the same

5. 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?
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
They do not differ
How strong a base is
E = (kq)/r^2

6. Light can be carried along a distance within a transparent material by means of what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Total internal reflection
Ability to locate an event in space
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

7. The volume of an object is equal to water?
Liquid displaced by that object
Only temperature of the water bath
(density[p])(volume)
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

8. How do you find 'g' from Newton's law of gravity?
B = pVg; density
F = GMm/r^2
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

9. Hydrogen has what kind of standard oxidation or reduction potential?
One mole of electric charge
Colligative; the number of solute particles present
Zero
It's weight = mg; the work would be the weight times the distance fell

10. The temperature of a metal will not increase above its melting point until what?
Half of the exponent
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
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
(+)

11. Beta decay is the same as what?
Positron emission
B = pVg; density
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
One mole of electric charge

12. In order to guarantee a non-zero spin how many electrons are needed?
7 always!!!
Going from solid to gas phase
Negative
An odd number

13. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Sp^3
H has a small atomic radius
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

14. What is the equation for pressure?
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
F =ma and F= qE
Density (gravitational constant) height
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

15. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
It decreases; the work done by the gas in expanding decreases its internal energy
Negative
Constant to overcome the heat of fusion (solid to liquid state)
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)

16. Can a charged particle be detected by two anodes?

17. Why does light travel slower in an optically dense medium than through a vacuum?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
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
Positron because this is known as positron decay/electron capture

18. How do you find specific gravity of an object?
Going from solid to gas phase
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
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
Isolating an atom from minerals by decomposing the minerals with an electric current

19. Heat from friction comes from what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Decreasing potential energy
Gravity

20. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
A positron or electron; when atomic number goes up you know an electron has been emitted
A saturated solution in which the aqueous ions are in equilibrium with the solid
0 Hz because they are traveling side by side at the same speed
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

21. The force on an electrical charge is what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
F =ma and F= qE
The element's mass number

22. What if the circuit elements are in series?
400 to 700 nm
The current is the same
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
They are directly proportional

23. A pendulum moves under the influence of what?
They increase because you hear a lower frequency
It will increase as well because they are directly related - only if pressure is kept constant
Gravity
Force times the distance over which the force acts

24. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
The reaction between the base and water
You look at what is being oxidized and reduced in the problem
Helium; 4

25. What does the empirical formula show?
W = F(displacement)
The lowest whole number ratio of moles of each element in a mole of a cmpd
Mv = mv
F =ma and F= qE

26. The visible spectrum ranges from ____ to _____
400 to 700 nm
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
L = wavelength/2 so L= (wavelength)(2)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

27. 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?
(+)
[S][2S]^2 = 4S^3
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
It has a positive oxidation potential so it is easily oxidized

28. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Alkali metals = first column
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
Helium; 4
The volume of the ice cube or whatever it is

29. Is the work done by air resistance - positive or negative?
Attractive molecular forces acting between material surfaces in contact
A positron or electron; when atomic number goes up you know an electron has been emitted
Add them together
Negative

30. What type of acid and base would produce a pH closest to 7?
H = negative and S = positive
How strong a base is
Strong acid and strong base/ weak acid and weak base
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

31. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
When you have central atom with six ions on it
Total internal reflection
Cathode; anode
They are directly proportional

32. What is sublimation?
It will increase as well because they are directly related - only if pressure is kept constant
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Momentum
Going from solid to gas phase

33. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
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
Positron because this is known as positron decay/electron capture
The lowest one
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

34. In Bohr model of atom when is energy emitted?
Electrons from anode and battery
When electron falls from high energy to low energy level
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
It's weight = mg; h

35. 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?
Add them together
W = F(displacement)
Its momentum is zero because velocity is zero; zero because of conservation of momentum
V/m or N/C

36. What happens if an atom undergoes positron decay or electron capture?
V/m or N/C
F =ma and F= qE
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

37. What is the doppler equation for wavelength and frequency?
The element's mass number
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Cathode; anode
Where an event took place

38. What is the magnitude of the electric field produced by a point charge?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It's weight = mg; h
E = (kq)/r^2
Its twice that distance

39. The phase difference corresponding to a half wave is what? When do you get destructive interference?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
180 degrees; when there is half a wave distance in phase between two waves
Mag and direction
+/- 1/2

40. Half-sine wave shape is what kind of wavelength with regards to length?
H = negative and S = positive
L = wavelength/2 so L= (wavelength)(2)
3+
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

41. When is a body in translational equilibrium?
Neutrons; atomic number
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
When all the external forces = zero
Positron because this is known as positron decay/electron capture

42. How do you balance redox rxns?

43. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
P = F(v) = mg(v -terminal)
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 blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
[S][2S]^2 = 4S^3

44. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It decreases; the work done by the gas in expanding decreases its internal energy
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

45. 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?
The path is longer on the inclined plane so it will take object longer to reach the bottom
6.02 x 10^23 ions/mol
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It will be reduced the voltage produced by the resistor which means IR; E- IR

46. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Cathode; anode
It can also equal 'mg'; the compressive strength of a substance
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Mass number stays the same but the atomic number increases

47. The closer the spacing of the anode wire - the better one can specify what?
It will increase as well because they are directly related - only if pressure is kept constant
A salt and water
Where an event took place
[S][2S]^2 = 4S^3

48. When a falling mass is at terminal speed - what is the power expended by the air resistance?
They are directly proportional
P = F(v) = mg(v -terminal)
Colligative; the number of solute particles present
Energy

49. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
Energy
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
It can absorb light that lets other electrons fill those orbitals
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

50. When an element decreases its atomic number by one what is emitted?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
T = (2h/g)^1/2; distance = vt
Positron because this is known as positron decay/electron capture
Ability to locate an event in space