Most popular questions and responses by Pat
  1. Physics

    A 5.0 µC point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (µC = 1.0 × 10–6 Vq=energy so delta V must be 10

    asked on May 19, 2012
  2. Chemistry

    A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

    asked on October 30, 2010
  3. Physics

    You have a 2.00 kg block of lead. Lead melts at 327.5°C. CPb = 130.0 , and Hf for lead is 2.04 × 104 J/kg. Say you start at room temperature (25.0°C). How much heat must you transfer to melt all the lead?

    asked on March 18, 2012
  4. Physics

    Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space.

    asked on January 27, 2012
  5. Physics

    A man weighing 700 N lifts a 50.0 N object 2.0 m high. He uses a lever and with a force of 10.0 N. What is the resistance force

    asked on February 7, 2012
  6. Physics

    A 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is 6.0 × 1024 kg. Show

    asked on January 27, 2012
  7. History

    Which of the following was formally amended to the constitution a. equality of rights for women b. prohibition of alcoholic beverages c. prohibition of child labor d. balanced federal budget I know that the 19th amendment is woman suffrage, but the 18th

    asked on January 20, 2007
  8. Criminal Justice/Writing Search Warrants

    When writing the description for the property you are going to search for, the description must be detailed: A. so the average person can distinguish among similar objects in the search. B. so that only the magistrate and investigator can discern the

    asked on November 1, 2014
  9. Criminal Justice/White Collar Crime

    An authorized program planted on a computer is known as a(n): A. Trojan Horse. B. Achilles Heel. C. Sword of Damocles. D. Cyclops Eye. My textbook only mentions an "unauthorized program" which is a Trojan Horse. But I looked on line and I think it may be

    asked on September 26, 2015
  10. Physics

    3. A 0.200 kg air-track glider moving at 1.20 m/s bumps into a 0.600 kg glider at rest. a.) Find the total kinetic energy after collision if the collision is elastic. .144J I got that one. b.) Find the total kinetic energy after collision if the collision

    asked on February 28, 2012
  11. physics

    The 80kg student balances a 1300kg elephant on a hydraulic lift. (U-Tube) What is the diameter of the piston the student is standing on? When a second student joins the first, the height difference between the liquid levels in the right and left pistons is

    asked on January 19, 2015
  12. Physics

    The strength of an electric field at 5.0 cm from a point charge is 100.0 N/C. What is the magnitude of the source charge? Show work so I understand how to do it.

    asked on May 19, 2012
  13. chemistry

    calculate the mass, in grams, of NaCl present in each of the following solutions. 6.25 g of 11.5% NaCl solution 452 g of 12.3% NaCl solution please show me how to do these. Thanks.

    asked on April 29, 2011
  14. Physics

    each resistor in the circuit shown is 5.0 Ù, and the battery is 12.0 V, what does the second ammeter (A2) read?

    asked on May 24, 2012

    1. A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance?

    asked on June 5, 2012
  16. Physics

    Compute the angular momentum of the earth arising from the following motions. (a) Earth's orbital motion around the sun. (b) Earth's rotation on its axis.

    asked on October 22, 2012
  17. Chemistry

    Consider the reaction: 2CO(g) + O2(g) equilibrium 2CO2 (g) Write the equilibrium expression for this reaction. Keq = ?? Addition of a catalyst to this reaction would have what effect on the equilbrium? Addition of a catalyst to this reaction would have

    asked on June 2, 2013
  18. Physics

    A 500.0 g metal block absorbs 3.25 × 103 J of heat to raise its temperature by 50.0 K. What is the substance? Please show steps because I have several problems like this and then I can see where I am goibg wrong

    asked on March 12, 2012
  19. American Constitutional Law

    Which of the following best describes the relationship between the federal government and state militias? A. The militias are independent state entities over which the federal government has no authority. B. The militias are federal entities over which the

    asked on August 23, 2014
  20. Art History

    In the Doric order, which of the following are alternating panels in the frieze, which are sometimes sculpted? A. Metopes B. Triglyphs C. Palmettes D. Volutes My textbook says it's A and B. So I am really confused on this one.

    asked on November 14, 2014
  21. math

    2. Suppose you obtain a $3,000 T-note with a 3% annual rate, paid quarterly, with maturity in 5 years. How much interest will you earn?

    asked on July 21, 2015
  22. Calculus

    two sides of triangle are 10m and 19m and the angle between them is increasing at a rate of 2 degrees per minute. How fast is the third side changing when the angle between them is 60 degrees

    asked on June 20, 2015
  23. physics

    current through a device is 0.30 A, and the resistance in the device is 40 Ù. How many 1.5 V batteries are required to run the device

    asked on May 24, 2012
  24. Criminal Justice/White Collar Crime

    Bounty hunters in the medical fraud area are: 1 A. people who use strong-arm tactics to collect bills that are not owed. B. doctors who receive a fee for a articular diagnosis. C. facilities that specialize in the patients who are most seriously ill. D.

    asked on September 26, 2015
  25. Physics

    A ball is thrown horizontally from a platform so that the initial height of the ball is 6.0 m above the level ground below. The ball lands 24 m from its original horizontal location. Find how fast the ball was thrown. Show work i just don't understand

    asked on January 11, 2012
  26. Physics

    A 44 kg child jumps off a 2.2 kg skateboard that was moving at 8.0 m/s. The skateboard comes to a stop as a result. Find the speed at which the child jumped from the board. Show all your work. Assume a frictionless, closed system.

    asked on January 27, 2012
  27. Math

    A spinner is divided into 20 equal sections and are numbered 1 through 20. What is the probability of the spinner's pointer landing on section 5?

    asked on May 5, 2012
  28. Ethics in Criminal Justice

    Which of the following frameworks would be most likely to justify convicting an innocent person? A. Virtue ethics B. Utilitarianism C. Kantain ethics D. Natural law I think it's A, but not 100% sure.

    asked on May 15, 2014
  29. chem

    Two hundred grams of a substance requires 0.52 kJ of heat to raise its temperature from 25°C to 45°C. q = mCT. Mass (m) is in grams. Temperature is in degrees Celsius.

    asked on May 17, 2011
  30. chemistry

    A hexane solution contains as impurities 5.2% (by mass) hepatne and 2.9% (by mass) pentane. Calculate the mass of each component present in 93g of the solution.

    asked on April 17, 2011
  31. Physics

    the engineer of a passenger train traveling at 25.0 m/s sights a freight train whose caboose is 200m ahead on the same track. The freight train is traveling at 15.0 m/s in the same direction as the passenger train. The engineer of the passenger train

    asked on July 21, 2010
  32. algebra

    A pharmacist has 40% and 60% iodine solutions on hand. How many liters of each iodine solution will be required to produce 6 liters of 50% iodine mixture?

    asked on November 6, 2018
  33. Physics

    A flywheel turning at 1200 rev/min (125.7 rad/s) constant angular velocity has a radius of 2.5 cm. As it turns, a string is to be wound onto its rim. How long is the string if it is wound up in 10 seconds? It says the answer is 31.4m, but I don't know the

    asked on March 14, 2018
  34. Criminal Justice/White Collar Crime

    Actions by the government that contributed to the collapse of the savings and loan industry included all of the following EXCEPT: A. increasing down payment requirements. B. commercial real estate loans. C. permitting money market mutual funds. D.

    asked on September 20, 2015
  35. Chem

    What is the change in enthalpy when 250 g of steam condenses at 100oC? (Hv = 40.67 kJ/mol)

    asked on May 17, 2011
  36. MAT201-Basic Statistics

    A dealership sold 15 cars last month. The purchase price of the cars, rounded to the nearest thousand, is represented in the table Purchase Price/# of cars sold $15,000 3 $20,000 4 $23,000 5 $25,000 2 $45,000 1 A.Find the mean and median B. Which measures

    asked on November 24, 2014
  37. Chemistry 2

    A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the reaction.

    asked on September 13, 2007
  38. physics

    A boy drops a 0.10 kg stone down a 150 m well and listens for the echo. The air temperature is 20°C. How long after the stone is dropped will the boy hear the echo? The speed of sound through air at 20°C is v = 343 m/s.

    asked on May 21, 2012
  39. Physics

    A 5.0 µC point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (µC = 1.0 × 10–6 C)

    asked on May 19, 2012
  40. physics

    A 23- bullet traveling 230 penetrates a 3.6 block of wood and emerges cleanly at 170 . If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

    asked on October 14, 2011
  41. personal finance

    Hal Thomas wants to establish a savings fund from which a community organization could draw $800 a year for 20 years. If the account earns 3 percent, what amount would he have to deposit now to achieve this goal? (Round time value factors to 3 decimal

    asked on February 6, 2015
  42. Ethics in Criminal Justice

    Which of the following comes closest to what Aristotle regarded as the highest human good? A. Pleasure B. Avoidance of Pain C. Flourishing D. Prosperity My book mentions flourishing and eudaimonia (which means prosperty). So I am torn between the two.

    asked on May 15, 2014
  43. Algebra

    Hi sorry i don't know if there's a reply function in this website (there should be). So for the info, it's: -Item: $5800 -Down payment: $600 -Finance charge: 7% -12 months to pay -Not sure if compound interest but I'd assume if that's how installments

    asked on April 11, 2019
  44. Physics

    Summarize two observations that are contrary to the predictions based on Newton’s laws but that confirm Einstein’s explanation of gravity. Indicate how the predictions based on Newton’s theory differ from Einstein’s.

    asked on January 11, 2012
  45. Physics

    A ball is thrown horizontally from a platform so that the initial height of the ball is 6.0 m above the level ground below. The ball lands 24 m from its original horizontal location. Find how fast the ball was thrown. Show work i just don't understand

    asked on January 11, 2012
  46. Physics

    Cheryl runs a race on a 400.0 m circular track. She starts running east of the starting line and then circles the track and falls, stopping 1.00 m west of the starting line. Her time is 80.0 s. What was her average velocity? I know the correct answer is

    asked on January 9, 2012
  47. Physics

    A 6.0 kg block of ice rests on a surface that is tilted by = 12°. Find the acceleration of the block ignoring any friction.

    asked on January 11, 2012
  48. Statistics

    When conducting an inferential statistical analysis, and applying a conventional "critical p-value" of .05, the odds of making a Type I Error and "rejecting a true Null Hypothesis" is? A. 1 in 30 B. 1 in 100 C. 1 in 20 D. 1 in 10

    asked on September 2, 2012
  49. physics

    A wire loop has an area of 0.12 m2, and the magnetic field through it increases from 0 to 0.20 T in 0.30 s. What is the induced emf in the loop?

    asked on May 27, 2012
  50. Physics

    A 0.300-kg ice puck, moving east with a speed of 5.86m/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic. What is the speed of the 0.300-kg puck after the collision? What ise the speed of the

    asked on October 10, 2014
  51. math

    A street light is at the top of a 15 ft pole. A 5 ft tall girl walks along a straight path away from the pole with a speed of 5 ft/sec. (A)At what rate is the tip of her shadow moving away from the light (ie. away from the top of the pole) when the girl is

    asked on November 3, 2015
  52. Physics

    The minimum frequency for the photoelectric effect of a zinc plate is 9.7 × 1014 Hz. What will be the kinetic energy of an ejected electron when a photon with a wavelength 200 nm (2.00 × 10 7 m) strikes it?

    asked on May 27, 2012
  53. physics

    ab elevator (mass 4850kg) is to be designed so that the maximum acceleration is .0680g. what are the maximum and minimum forces the motor should exert on the supporting cable? i know the answers but don't know how to come up with the work! (5.08*10^4N and

    asked on October 1, 2006
  54. Criminal Justice/Judicial System

    Studies indicate that __________ are overrepresented in the jail population. A. Whites B. Hispanics C. African-Americans D. Asians I Think it's B, but not sure.

    asked on February 16, 2015
  55. Physics

    A bicyclist is coasting down a road that is sloped downward at an angle of 8°. The bicycle and bicyclist have a total mass of 80 kg. If the bicycle wheels roll freely, without any effect from friction or air resistance slowing the motion, how fast would

    asked on November 3, 2011

    Please see if I have the right answer. The three atoms in a water molecule are held together by oxygen bonds, covalent bond, surface tension, hydrogen bonds, or gravity. I think it's covalent bonds. Am I right? Water molecules, even inflowing water, can

    asked on December 8, 2006
  57. Criminal Justice/Domestic Violence

    Researchers recommend that future responses to intimate partner violence should include all of the following EXCEPT: A. assessing children who directly witness intimate partner violence to determine if psychological treatment is needed. B. testing

    asked on May 16, 2015
  58. Criminal Justice/Report Writing

    What is a common mistake most investigators make in the interview? A. They do not give the interviewee enough time to answer a question before asking another one. B. They break for lunch too early. C. They let an interviewee talk without interruption,

    asked on November 1, 2014
  59. physical science

    A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration. 5280 ft/sec2 528 ft/sec2 100 ft/sec2 100. ft/sec2

    asked on June 27, 2011
  60. trig

    In triangle XYZ, angle X = 90°, angle Y = 38°, and z = 4'5". Find y

    asked on May 20, 2011
  61. Chem

    4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is used. Since the oxalate is in excess , Calculate the theoretical yield of the iron complex. FeSO4•NH4)2SO4•6H2O + H2C2O4•2H20 --> FeC2O4 + (NH4)2SO4 + H2SO4 + 8H2O 6FeC2O4 + 3H2O2 +

    asked on November 24, 2010
  62. 3re grade math

    i need help on this problem. 132,164,569 round to the nearest million? 179,323,175 round to the nearest million? thanks!

    asked on January 14, 2010
  63. Algebra

    you deposit 3500 in an account that pays 4.5% annual interest, compounded monthly. How long will it take for the balance to reach 5000? Use formula A= P[1+(r/n)]^(ny) and use knowledge of logarithms.

    asked on August 7, 2013
  64. Chemistry

    When a mixture of sulfur and metallic silver is heated, silver sulfide is produced. What mass of silver sulfide is produced from a mixture of 3.0 g Ag and 3.0 g S8? 16 Ag(s) + S8(s) > 8Ag2S(s)

    asked on May 6, 2012
  65. math

    a social security number contains nine digits such as 074-66-7795. how many different social security numbers can be formed?

    asked on October 4, 2012
  66. Statistics

    A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults give a mean weekly computer usage time of 8.5 hours and that from prior studies , the population

    asked on June 25, 2012
  67. Lost in Physics

    The strength of an electric field at 5.0 cm from a point charge is 100.0 N/C. What is the magnitude of the source charge? Show work so I understand how to do it. E=kQ/r^2 solve for Q, you have r, E What do I do NOW? I am lost

    asked on May 19, 2012
  68. Art History

    Which civilization had the most fortifications? A. Cycladic B. Minoan C. Mycenaean D. Harappan I think it's C.

    asked on November 14, 2014
  69. American Constutional Law

    Which right is NOT explicitly mentioned in the Bill of Rights? A. Right to privacy B. Right to bear arms C. Right to due process D. Right to grand jury indictment in capital cases I am confused on this one. They are all mentioned, but it says "right to

    asked on August 31, 2014
  70. Art History

    According to Robert Venturi, what is wrong with the International Style of architecture? A. It is too heterogeneous. B. It is too complex. C. It is too contradictory. D. It is too inflexible. My textbook says is A, B, and C. So I am totally confused

    asked on November 29, 2014
  71. Chemistry

    Which of the following can be amphoteric? A) Cl¯ B) H3O+ C) HPO4¯ D) PO4¯³ E) HCl

    asked on February 8, 2011
  72. physics

    a metal wire 1.0 mm in diameter and 2.0 m long hangs vertically with a 5.0 kg mass suspended from it. if the wire stretches 1.2 mm under the tension, what is the value of the young's modulus for metal?

    asked on January 10, 2011
  73. Math

    How many times in a 12 hour period does the sum of the digits on a digital clock equal 6? (For example. 1:32 = 1+3+2 = 6

    asked on February 23, 2018
  74. Criminal Justice/White Collar Crime

    A gift becomes a bribe when: A. it is requested. B. there is a quid pro quo. C. the amount exceeds the salary of the elected official. D. it is freely given. I think it's C, but not sure.

    asked on September 20, 2015
  75. Criminal Justice/White Collar Crime

    Like other criminogenic cultures, the savings and loan industry placed a heavy emphasis on: A. presence of organized crime interests. B. intricate government regulations. C. reduced competition. D. profit. I think it's D, but not sure

    asked on September 20, 2015
  76. Criminal Justice/Criminology

    The ACLU has publicly: A. supported the USA PATRIOT Act. B. filed suit to stop the USA PATRIOT Act. C. is neutral about the USA PATRIOT Act. D. has altered the USA PATRIOT Act. Is it A? I am confused on this one.

    asked on January 10, 2015
  77. Statistics

    In conducting multiple regression analyses (MRAs), a major technical concern involves any high correlation of predictor (regressor) variables included in the model. The term for this is ....? A. Redundant predictors B. Close "knit" IVs C. Multicollinearity

    asked on September 2, 2012
  78. Maths

    if a number is chosen at random from the integer 5-25 inclusive find the probability that the number is a multiple of 5 or 3

    asked on March 3, 2019
  79. statistics

    A "Set" within quantitative theory represents ...?

    asked on August 30, 2012
  80. physics 2

    A reservoir dam holds an 8 km2 lake behind it. Just behind the dam, the lake is 14.0m deep. What is the gauge pressure at the base of the dam (in Pascals)? What is the absolute pressure at a point 2.5 m down from the surface? Assume the pressure at the

    asked on June 20, 2016
  81. Pre-Calc Help please?

    The more you study for a certain exam, the better your performance on it. If you study for 10 hours, your score will be 65%. If you study for 20 hours, your score will be 95%.You can get as close as you want to a perfect score just by studying long enough.

    asked on February 16, 2016
  82. Art History

    Where did Gothic Architecture begin? A. Île-de-France B. Burgundy C. Tuscany D. Southern England I am torn between A & B

    asked on November 22, 2014
  83. American Constitutional Law

    A president is: A. absolutely immune from suit for executive functions. B. presumptively immune from suit for executive functions. C. not immune from suit whatsoever. D. only immune to the degree granted by Congress. I am stuck on this one between A & B

    asked on August 23, 2014
  84. calculus-max & min

    an open box with a square base is to be constructed from 48 square inches of material. What dimensions will produce a box with maximum volume?

    asked on January 31, 2013
  85. Statistics

    How large a sample of U.S. adults is needed in order to estimate U with a 95% confidence interval of length 1.2 hours?

    asked on June 25, 2012
  86. Physics

    A 70.50 kg man rides a Ferris wheel with a radius of 10.3 m at a velocity of 5.00 m/s. What is the centripetal force that she experiences expressed with the correct number of significant figures?

    asked on January 8, 2012
  87. Algebra

    An item costs $5800. Down payment for it costs $600 with s finance charge of 7%. What is the loan amount, monthly payment, and total cost? Can't remember the model so please do a step by step. Thanks

    asked on April 11, 2019
  88. American Constitutional Law

    What constitutional provision has been used to make most of the provisions within the Bill of Rights applicable to the states? A. Fourteenth Amendment Due Process Clause B. Fourteenth Amendment Equal Protection Clause C. Fourteenth Amendment Privileges or

    asked on August 30, 2014
  89. Physics

    Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.120 kg, initially moves to the right at a speed of 4.90 m/s, while the second block, of mass 0.240 kg, is initially to the left of the first block and moving to

    asked on October 18, 2012
  90. Math

    Let p -> q represent the conditional statement All hummingbirds love nectar. This is equivalent to p = If it is a hummingbird and q = then it loves nectar. State your answers to the questions below both in words and in symbols. 1. What is the

    asked on September 17, 2012
  91. math

    Can you each make up an example in which "Some A are not B" is true, but the statement "Some B are not A" is false? An example would be "Some dogs are not poodles" is true but "Some poodles are not dogs" is false

    asked on September 9, 2012
  92. Statistics

    Parametric procedures of quantitative analysis make an underlying assumption that...? A. Dichotomous variables have been "smoothed" B. The variables are measured at least at an ordinal level. C. All responses are measured in a mutually exclusive manner D.

    asked on September 2, 2012
  93. Science

    I'm going crazy! The heat necessary to change the state of water between a solid and a liquid is called the latent heat of vaporization, latent heat of solidification, latent heat of fusion, latent heat of liquefaction, or none of the above. I thought it

    asked on December 8, 2006
  94. Physics

    A rowboat passenger uses an oar to push the boat off the dock by exerting a force of 60.0 N for 2.0 s. What impulse acts on the boat?

    asked on January 29, 2012
  95. Physics

    A football player punts the football so that it will have a hang time of 4.5s and land 46m away. If the ball leaves the player's foot 1.5m above the ground, what must be (a) the magnitude and (b) angle (relative to the horizontal) of the ball's initial

    asked on June 28, 2010
  96. math2

    Solve the problem. You traveled 189 miles on 7 gallons of gasoline. At this rate, how many gallons of gasoline would you need to travel 297 miles?

    asked on March 11, 2010
  97. Criminal Justice/Judicial System

    History makes it clear that the federal bench has attracted people from a fairly select demographic, usually the __________ and __________ classes. A. lower upper; upper upper B. upper middle; upper C. middle; upper middle D. lower; middle I think it's D,

    asked on February 8, 2015
  98. Criminal Justice/Report Writing

    If a Miranda admonishment is needed, the generally accepted method of giving it is to: A. recite the Miranda admonishment from memory. B. give the interviewee a printed Miranda admonishment to read. C. ask the interviewee if he or she already knows the

    asked on November 1, 2014
  99. Physics

    You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min. What is your velocity in m/s?

    asked on January 9, 2012
  100. Algebra

    Two hikers are 22 miles apart and walking toward each other. They meet in 5 hours. Find the rate of each hiker if one hiker walks 2.2 mph faster than the other.

    asked on February 24, 2017


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