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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.
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. How do you find specific gravity of an object?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It will increase as well because they are directly related - only if pressure is kept constant
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

2. Can a catalyst shift equilibrium?
P = IV
No - it increases the speed at which the rxn reaches that equilibrium
Mag and direction
They must balance

3. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
The path is longer on the inclined plane so it will take object longer to reach the bottom
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
Only temperature of the water bath
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

4. What is the magnetic quantum number?
-l to +l
Ability to locate an event in space
H has a small atomic radius
It's weight = mg; the work would be the weight times the distance fell

5. In general what is formed by an acid-base rxn?
Its intensity in the spectrum
A salt and water
The reaction between the base and water
7 always!!!

6. Is the work done by air resistance - positive or negative?
Negative
You look at what is being oxidized and reduced in the problem
The nucleus gains a proton and no neutrons
Polar

7. How would you find rate of rxn from pH 1 to pH2?
It's weight = mg; the work would be the weight times the distance fell
Electrons from anode and battery
Mg
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

8. Terminal voltage is provided to what?
External components of the circuit
When electron falls from high energy to low energy level
One mole of electric charge
Mag and direction

9. How do you find wavelength if you known distance from adjacent crests and troughs?
The element's mass number
Its twice that distance
-l to +l
Ability to locate an event in space

10. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
Electron shell number
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)

11. In order to guarantee a non-zero spin how many electrons are needed?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
An odd number
When HIn is turned into In- - which is dependent upon the pKa of the indicator
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

12. 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?
Attractive molecular forces acting between material surfaces in contact
When electron falls from high energy to low energy level
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
Energy

13. 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
E = (kq)/r^2
-l to +l
Going from solid to gas phase

14. The closer the spacing of the anode wire - the better one can specify what?
P = F(v) = mg(v -terminal)
Where an event took place
No - it increases the speed at which the rxn reaches that equilibrium
A salt and water

15. When is a body in translational equilibrium?
Energy
When all the external forces = zero
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
3+

16. 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
Half of the exponent
Going from solid to gas phase
Ease of polarizability of the molecule and thus increasing molecular weight of mass

17. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
When all the external forces = zero
Positron because this is known as positron decay/electron capture
NO; reduction-oxidation

18. When something is falling what is the force acting on it? Thus what would be the work done?

19. What is the equation for work done?
The number of electrons emitted
W = F(displacement)
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
P = F(v) = mg(v -terminal)

20. What are the three separate module for tensile stress - shear stress - and compression/expansion?

21. If you have longer wavelengths how is their freq and energy compared to shorter wavelengths?
T = 2pi/angular velocity; v/r
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

22. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
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
Mv = mv
180 degrees; when there is half a wave distance in phase between two waves
They increase because you hear a lower frequency

23. How do you find length of time something is in flight? How do you find distance it traveled?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
1000
T = (2h/g)^1/2; distance = vt
Energy

24. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

25. 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?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
0 Hz because they are traveling side by side at the same speed
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)

26. The free energy change (G) must be negative when what?
The density of the water and volume of the lead 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
H = negative and S = positive
Alkali metals = first column

27. The square root of 10^anything is equal to what?
Momentum
Half of the exponent
They do not differ
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

28. The volume of an object is equal to water?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Positive
Liquid displaced by that object
Vertically; perpendicular to all surfaces

29. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Only temperature of the water bath
How strong a base is
3+
Positive

30. How should the period of a waveform be calculated?
Faraday/electrons
From peak to peak
Polar
A positron or electron; when atomic number goes up you know an electron has been emitted

31. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
You look at what is being oxidized and reduced in the problem
Gravity
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

32. What is Newton's Universal Law of Gravitation?
It's weight = mg; h
The buoyant force on it; W = mg = pVg
T = (2h/g)^1/2; distance = vt
F = GMm/r^2

33. 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?
When electron falls from high energy to low energy level
When all the external forces = zero
The density of the water and volume of the lead object
E = (kq)/r^2

34. The range of pH in which a color change takes place in a titration depends on what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Red
The path is longer on the inclined plane so it will take object longer to reach the bottom
(+)

35. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
It will be reduced the voltage produced by the resistor which means IR; E- IR
It's weight = mg; the work would be the weight times the distance fell
They are directly proportional
Sp^3

36. A plane mirror produces an image where?
L = wavelength/2 so L= (wavelength)(2)
At an equal distance behind it as the object is in front of the mirror
You look at what is being oxidized and reduced in the problem
Positron because this is known as positron decay/electron capture

37. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
Positron because this is known as positron decay/electron capture
Going from solid to gas phase
Voltage

38. 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?
They do not differ
Force times the distance over which the force acts
It has a positive oxidation potential so it is easily oxidized
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

39. The temperature of a metal will not increase above its melting point until what?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The path is longer on the inclined plane so it will take object longer to reach the bottom
That of static friction; there is a net accelerating force on the block once it starts to slide

40. What is the equation for pressure?
Electrons from anode and battery
Density (gravitational constant) height
NO; reduction-oxidation
The lowest whole number ratio of moles of each element in a mole of a cmpd

41. As a balloon rises in a tank of water what happens to the temperature inside it? Why would this happen?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
It decreases; the work done by the gas in expanding decreases its internal energy
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Mv = mv

42. 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
Zero
When all the external forces = zero
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

43. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
Positron because this is known as positron decay/electron capture
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
Polar

44. What is the magnitude of the electric field produced by a point charge?
E = (kq)/r^2
Vertically; perpendicular to all surfaces
Total internal reflection
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

45. The electrons emitted from cathode are replaced with what?
B = pVg; density
Electrons from anode and battery
At an equal distance behind it as the object is in front of the mirror
180 degrees; when there is half a wave distance in phase between two waves

46. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
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
Cathode; anode
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
They increase because you hear a lower frequency

47. Strength of dispersion force increases with what?
F = GMm/r^2
Vertically; perpendicular to all surfaces
Ease of polarizability of the molecule and thus increasing molecular weight of mass
It decreases; the work done by the gas in expanding decreases its internal energy

48. When does red litmus paper turn blue?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Positive
[S][2S]^2 = 4S^3
In the presence of a base

49. The basicity constant Kb measures what?
The number of electrons emitted
How strong a base is
Polar
Alkali metals = first column

50. How do you find moles of a substance when you are given faradays and electrons?
Strong acid and strong base/ weak acid and weak base
Faraday/electrons
Energy
The reaction between the base and water