DSST Physical Sciences2

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 the unit for Young's Modulus?
Pascal (N*m^2)
The buoyant force on it; W = mg = pVg
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water


2. How should the period of a waveform be calculated?
From peak to peak
A saturated solution in which the aqueous ions are in equilibrium with the solid
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
When electron falls from high energy to low energy level


3. Heat from friction comes from what?
Decreasing potential energy
T = (2h/g)^1/2; distance = vt
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Mg


4. In general what is formed by an acid-base rxn?
7 always!!!
A salt and water
The volume of the ice cube or whatever it is
(density[p])(volume)


5. Light can be carried along a distance within a transparent material by means of what?
Total internal reflection
[S][2S]^2 = 4S^3
A salt and water
An odd number


6. Can a catalyst shift equilibrium?
Constant to overcome the heat of fusion (solid to liquid state)
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
B = pVg; density
No - it increases the speed at which the rxn reaches that equilibrium


7. Melting occurs at what type of temperature? Why?
An odd number
Constant to overcome the heat of fusion (solid to liquid state)
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
F =ma and F= qE


8. Hydrogen has what kind of standard oxidation or reduction potential?
Zero
When you have central atom with six ions on it
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
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


9. How do you figure out the literature Ksp value of a compound?
Mag and direction
F =ma and F= qE
A saturated solution in which the aqueous ions are in equilibrium with the solid
Yes - if the particle's trail is equidistant between two adjacent anodes


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

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11. The square root of 10^anything is equal to what?
The nucleus gains a proton and no neutrons
Half of the exponent
When you have central atom with six ions on it
Liquid displaced by that object


12. What is the equation for a period (T)? What is the equation for angular velocity?
T = 2pi/angular velocity; v/r
The number of electrons emitted
F = GMm/r^2
-l to +l


13. Why are bonds between H and another atom shorter compared to most?
The element's mass number
H has a small atomic radius
L = wavelength/2 so L= (wavelength)(2)
One mole of electric charge


14. Beta decay is the emission of what? How do you know what it is the emission of?
A positron or electron; when atomic number goes up you know an electron has been emitted
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Cathode; anode
Half of the exponent


15. How do you find specific gravity of an object?
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
Positive
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
Its intensity in the spectrum


16. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
That they are catalysts in the rxn because they react with the substrate and are reformed
They increase because you hear a lower frequency
They do not differ
Total internal reflection


17. In radioactive decay the atomic number (A) and mass number (Z) must what?
They must balance
+/- 1/2
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
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous


18. What is Newton's Universal Law of Gravitation?
F = GMm/r^2
The buoyant force on it; W = mg = pVg
It's weight = mg; the work would be the weight times the distance fell
[S][2S]^2 = 4S^3


19. The coefficient of kinetic friction is always lower than what? Therefore what?
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
That of static friction; there is a net accelerating force on the block once it starts to slide
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed


20. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
An odd number
Add them together
Electrons from anode and battery
NO; reduction-oxidation


21. The freezing point of an aqueous solution is what kind of property? What does this mean?
Colligative: it depends on the number of solute molecules in a given volume of water
Neutrons; atomic number
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
F = GMm/r^2


22. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
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
The reaction between the base and water
Positron because this is known as positron decay/electron capture


23. When does red litmus paper turn blue?
In the presence of a base
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Where an event took place
Faraday/electrons


24. What is the amt of energy that a frictional force generates?
Force times the distance over which the force acts
Alkali metals = first column
B = pVg; density
The lowest whole number ratio of moles of each element in a mole of a cmpd


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

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26. If you have circuit elements in parallel what is the same across them?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
6.02 x 10^23 ions/mol
When all the external forces = zero
Voltage


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

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28. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Polar
You look at what is being oxidized and reduced in the problem
They increase because you hear a lower frequency
1000


29. What are the units of an electric field?
V/m or N/C
It will increase as well because they are directly related - only if pressure is kept constant
It has a positive oxidation potential so it is easily oxidized
No - it increases the speed at which the rxn reaches that equilibrium


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


31. Half-sine wave shape is what kind of wavelength with regards to length?
The number of electrons emitted
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
At an equal distance behind it as the object is in front of the mirror
L = wavelength/2 so L= (wavelength)(2)


32. How do you balance redox rxns?

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33. The Ksp for a substance of AaBb is what?
[A]^a[B]^b
The path is longer on the inclined plane so it will take object longer to reach the bottom
In the presence of a base
H = negative and S = positive


34. What is the equation for bouyant force? What is p?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Zero
Cathode; anode
B = pVg; density


35. What direction do gravity and bouyancy work? What direction does water pressure work?
Its intensity in the spectrum
Vertically; perpendicular to all surfaces
A salt and water
It can absorb light that lets other electrons fill those orbitals


36. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
(density[p])(volume)
The nucleus gains a proton and no neutrons
Only temperature of the water bath
(+)


37. What is a metathesis rxn?
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
Liquid displaced by that object
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
E = (kq)/r^2


38. What is the spin projection quantum number?
+/- 1/2
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Liquid displaced by that object
Constant to overcome the heat of fusion (solid to liquid state)


39. What is the doppler equation for wavelength and frequency?
Half of the exponent
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
One mole of electric charge
The nucleus gains a proton and no neutrons


40. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
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
The lowest whole number ratio of moles of each element in a mole of a cmpd
B = pVg; density
Going from solid to gas phase


41. 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?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
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
The nucleus gains a proton and no neutrons
(+)


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

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43. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
B = pVg; density
The regular one
Polar
The lowest one


44. What is the principal quantum number (n)?
Electron shell number
The reaction between the base and water
0 Hz because they are traveling side by side at the same speed
B = pVg; density


45. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
Sp^3
The path is longer on the inclined plane so it will take object longer to reach the bottom
The buoyant force on it; W = mg = pVg


46. The visible spectrum ranges from ____ to _____
Faraday/electrons
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
400 to 700 nm
The reaction between the base and water


47. What is the law of conservation of linear momentum?
Mv = mv
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
F =ma and F= qE
You look at what is being oxidized and reduced in the problem


48. What kind of metals react violently with water?
Its intensity in the spectrum
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Alkali metals = first column
Positron because this is known as positron decay/electron capture


49. What happens to a negatively charged particle put between two parallel plates?
Negative
The current is the same
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
External components of the circuit


50. Isotopes have diff number of ______ but same what?
Force times the distance over which the force acts
Sp^3
Cathode; anode
Neutrons; atomic number