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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 is newton's second law?
Decreasing potential energy
The path is longer on the inclined plane so it will take object longer to reach the bottom
Colligative: it depends on the number of solute molecules in a given volume of water
A constant force on a mass causes it to have a constant acceleration

2. When you are trying to calculate a galvanic cell's emf - what do you look at?
Mv = mv
L = wavelength/2 so L= (wavelength)(2)
You look at what is being oxidized and reduced in the problem
The reaction between the base and water

3. What kind of geometry is octahedral?
When you have central atom with six ions on it
Alkali metals = first column
T = (2h/g)^1/2; distance = vt
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)

4. If you have circuit elements in parallel what is the same across them?
Its twice that distance
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
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
Voltage

5. 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?
(density[p])(volume)
(+)
NO; reduction-oxidation
+/- 1/2

6. Acetic acid is a ______ solvent
Helium; 4
The density of the water and volume of the lead object
Polar
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

7. How do you find length of time something is in flight? How do you find distance it traveled?
T = (2h/g)^1/2; distance = vt
The density of the water and volume of the lead object
Voltage
When all the external forces = zero

8. 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?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Attractive molecular forces acting between material surfaces in contact
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
T = (2h/g)^1/2; distance = vt

9. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Negative
When electron falls from high energy to low energy level
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 cross-sectional area through which the fluid flows

10. How do you find wavelength if you known distance from adjacent crests and troughs?
Strong acid and strong base/ weak acid and weak base
Its twice that distance
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
The buoyant force on it; W = mg = pVg

11. What is usually conserved over oscillation periods?
That they are catalysts in the rxn because they react with the substrate and are reformed
Energy
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
Polar

12. When does red litmus paper turn blue?
One that has more solute particles per liter of solution
The element's mass number
Voltage
In the presence of a base

13. Why are bonds between H and another atom shorter compared to most?
From peak to peak
When all the external forces = zero
H has a small atomic radius
[S][2S]^2 = 4S^3

14. What is the magnitude of the electric field produced by a point charge?
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)
E = (kq)/r^2
The particle's charge and the magnitude of the electric field
Mv = mv

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

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

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17. 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?
Gravity
F = GMm/r^2
Add them together
A salt and water

18. Can a catalyst shift equilibrium?
Decreasing potential energy
[A]^a[B]^b
No - it increases the speed at which the rxn reaches that equilibrium
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

19. 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
Momentum
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
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water

20. How many mL is in one liter?
1000
Yes - if the particle's trail is equidistant between two adjacent anodes
Faraday/electrons
Strong acid and strong base/ weak acid and weak base

21. What is the doppler equation for wavelength and frequency?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
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
Where an event took place
It's weight = mg; h

22. The coefficient of static friction is the ratio of what?
0 Hz because they are traveling side by side at the same speed
The force along the board to the normal force
W = F(displacement)
Accelerated by a higher voltage between the cathode and anode

23. What if the circuit elements are in series?
The buoyant force on it; W = mg = pVg
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Decreasing potential energy
The current is the same

24. Equivalent mass is what?
When you have central atom with six ions on it
1000
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
It can also equal 'mg'; the compressive strength of a substance

25. What is the relationship between P and n in PV=nRT?
External components of the circuit
Ability to locate an event in space
Energy
They are directly proportional

26. What is the unit for Young's Modulus?
Pascal (N*m^2)
Only temperature of the water bath
The particle's charge and the magnitude of the electric field
It decreases; the work done by the gas in expanding decreases its internal energy

27. If you are given density and volume how do you find mass?
(+)
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
It can also equal 'mg'; the compressive strength of a substance
(density[p])(volume)

28. The closer the spacing of the anode wire - the better one can specify what?
Where an event took place
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Positron because this is known as positron decay/electron capture
Energy

29. The probability of an X-ray emission event at a given wavelength is measured by what?
Add them together
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Mass number stays the same but the atomic number increases
Its intensity in the spectrum

30. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
T = 2pi/angular velocity; v/r
Density (gravitational constant) height
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

31. 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?
Going from solid to gas phase
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
7 always!!!
It will be reduced the voltage produced by the resistor which means IR; E- IR

32. In Bohr model of atom when is energy emitted?
Isolating an atom from minerals by decomposing the minerals with an electric current
Ability to locate an event in space
When electron falls from high energy to low energy level
The lowest one

33. What is Newton's Universal Law of Gravitation?
The number of electrons emitted
The density of the water and volume of the lead object
When all the external forces = zero
F = GMm/r^2

34. What is different between an inclined plane and free fall?
An odd number
The path is longer on the inclined plane so it will take object longer to reach the bottom
In the presence of a base
Going from solid to gas phase

35. What is one faraday equal to?
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
One mole of electric charge
V/m or N/C
It will increase as well because they are directly related - only if pressure is kept constant

36. Hydrogen has what kind of standard oxidation or reduction potential?
Force times the distance over which the force acts
Zero
A saturated solution in which the aqueous ions are in equilibrium with the solid
400 to 700 nm

37. If temperature arises during a mixture what can you conclude about the enthalpy?
The density of the water and volume of the lead object
That it is negative
Only temperature of the water bath
Going from solid to gas phase

38. 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?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
A constant force on a mass causes it to have a constant acceleration
Voltage
Energy

39. Isotopes have diff number of ______ but same what?
Its intensity in the spectrum
Red
Isolating an atom from minerals by decomposing the minerals with an electric current
Neutrons; atomic number

40. Always remember that velocity has ____ and ____
Liquid displaced by that object
Mag and direction
The number of electrons emitted
Sp^3

41. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
Negative
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

42. Mechanical waves in a medium fxn to transport what?
Add them together
Colligative; the number of solute particles present
Energy
P = IV

43. Terminal voltage is provided to what?
External components of the circuit
Electron shell number
F =ma and F= qE
The buoyant force on it; W = mg = pVg

44. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
T = (2h/g)^1/2; distance = vt
When electron falls from high energy to low energy level
They increase because you hear a lower frequency
That they are catalysts in the rxn because they react with the substrate and are reformed

45. 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?
Colligative; the number of solute particles present
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Its momentum is zero because velocity is zero; zero because of conservation of momentum
3+

46. The phase difference corresponding to a half wave is what? When do you get destructive interference?
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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
180 degrees; when there is half a wave distance in phase between two waves
When you have central atom with six ions on it

47. A floating ice cube implies that it's weight is balanced by what?
One mole of electric charge
The buoyant force on it; W = mg = pVg
[A]^a[B]^b
Going from solid to gas phase

48. 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?
A positron or electron; when atomic number goes up you know an electron has been emitted
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
[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

49. In order to increase the kinetic energy of electrons - they must be what?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Negative
Accelerated by a higher voltage between the cathode and anode
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

50. Why does light travel slower in an optically dense medium than through a vacuum?
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
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Energy