1. Chemistry

    A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. assuming 25 drops per mL for all solutions, determine the initial molar

    asked by Anonymous on February 21, 2013
  2. Physics

    A 2160 kg car traveling at 10.5 m/s collides with a 2740 kg car that is initially at rest at the stoplight. The cars stick together and move 4.00 m before friction causes them to stop. Determine the coefficient of kinetic friction betwen the cars and the

    asked by John on February 24, 2015
  3. MAT LAB

    HW9_1: AXIAL AND TRANSVERSE STRAINS - THE POISSON'S RATIO When no loads are applied, the isotropic elastic block depicted below is a cube of side L0=200 mm. When the distributed load (surface traction) q=200 MPa is applied as shown below, the side length

    asked by AMK on July 19, 2013
  4. physics

    Believe it or not, a plumb-bob does not hang exactly along a line directed to the centre of the Earth! Determine how far off true plumb a bob hangs in Cape Town. In which direction is the deviation (north, east, south, or west)? How would your answer

    asked by joseph on April 21, 2011
  5. Math

    Determine the equation of the graph in the form y = acos(bx). I will try and describe the Graph. -It starts at the origin (0,0) -It has a minimum value of -2 -It has a maximum value of 2. -It has an x-intercept of 90 degrees. -It starts moving downward

    asked by Jill on March 4, 2010
  6. Math

    Determine the equation of the graph in the form y = acos(bx). I will try and describe the Graph. -It starts at the origin (0,0) -It has a minimum value of -2 -It has a maximum value of 2. -It has an x-intercept of 90 degrees. -It starts moving downward

    asked by Jill on March 5, 2010
  7. physics

    Bailey is on the tenth frame of her recent bowling competition and she needs to pick up the last pin for a spare and the first place trophy. She rolls the 7.05-kg ball down the lane and it hits the 1.53-kg pin head on. the ball was moving at 8.24 m/s

    asked by bryce on January 18, 2016
  8. EA course

    Can someone help me with this question please?? 10. When setting guidelines or rules for children and then enforcing them, the best advice is to A. have several discipline measures in mind for consequences of misbehavior. B. have children help determine

    asked by Cassandra on January 25, 2010
  9. Dynamics

    A motorcycle is traveling at 20 m/s when it enters the test section of a circular track with a 1000-m radius. Once in the test section, the cycle slows down and its deceleration along the track varies with its position, s, by the relation a(subscript t) =

    asked by Ryan on September 8, 2011
  10. physics

    A spelunker is surveying a cave. She follows a passage 150m straight west, then 270m in a direction 45^\circ east of south, and then 280 {\rm m} at 30^\circ east of north. After a fourth unmeasured displacement, she finds herself back where she started.Use

    asked by epifanio on January 19, 2013
  11. Geometry

    Determine the largest positive integer N, such that given any N-gon (not necessarily convex), there exists a line (infinitely extended in both directions) that contains exactly 1 edge of the N-gon. The figure in blue is an example of a 20-gon that doesn't

    asked by John on March 12, 2013
  12. Physics help!

    There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 105 dB, measured a distance of 4.5 m from the source. Determine the

    asked by Abdul A. on May 7, 2013
  13. English Language Arts

    Think about the work you completed in your reading role. Determine the ideas that would be most worthy to share in a literary discussion about Walk Two Moons. Provide an explanation for your choices. How did the role you selected and the work you completed

    asked by Jalon on May 24, 2017
  14. Chemistry

    How would you start and finish these questions by a step by step process? Does Amp equal to Joules? 1. How many grams of aluminum can be produced by the electrolysis of aqueous aluminum chloride by a current of 5.00 amps for 5.00 hours? 2. Consider the

    asked by Erika on April 6, 2014
  15. biology

    __Glycolysis is used to gain energy from glucose. How efficient is it (give an actual number) in its ability to get the energy from glucose into ATP? (assume the organism is undergoing anerobic fermentation). __You are studying a particular reaction in

    asked by Omar on September 24, 2008
  16. Grammar

    Determine if the following sentence employ the correct use of commas and apostrophes.TRUE=correct FALSE=wrong 1.The patient is a 41-year-old, white female with a several-month's history of biliary colic. ANSWER: False Thinking comma after old can be

    asked by Leslie on May 11, 2011
  17. Physics.

    1) Blood is pumped from the heart at a rate of 5.0 L/min into the aorta (of radius 1.0 cm). Determine the speed of blood through the aorta. 2)a bullet of mass 0.05kg is fired with a velocity of 200m/s into a lead block of 0.9kg. Given that the lead block

    asked by Ba'ala on February 10, 2019
  18. Math

    Two cell phone companies have different rate plans. Runfast has monthly charges $10 plus $4 per gig of data. B A &D’s monthly charge is $6 plus $6 per gig of data. Your task, is to determine under what circumstances each company has the better pricing.

    asked by Lopo on April 19, 2018
  19. accounting

    1. A pressurized spray painter was purchased on April 1 of the fiscal year for $4,800. It has a useful life of 4 years and a residual value of $300. Determine depreciation expense for the first two years, assuming a fiscal year end of December 31 and using

    asked by shawna on November 12, 2009
  20. Finance

    anthony bought a boat 3 years ago, and at that time he put a down payment of $25000 cash. today he made the second and final payment of $28 300, which includes the interest on the balance owing. anthony financed his purchase at 6.35%/a, compounded

    asked by diana on January 16, 2010
  21. Biology

    ystic fibrosis is caused by mutations in the CFTR gene, which encodes for a chloride channel. You are studying cystic fibrosis patients to determine what mutation they possess in the CFTR gene. The difference between the mutant and wild type CFTR can be

    asked by Anna on April 10, 2014
  22. Physics

    A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 63.6-kg water-skier has an initial speed of 5.3 m/s. Later, the speed increases to 10.8 m/s. Determine the work done by the

    asked by Gabby on November 8, 2011
  23. physics

    A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 84°C. The other sample has a mass of 58 g and is originally at a

    asked by Annette on April 29, 2013
  24. Physics

    Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 2.26 × 10-11 m. Determine the magnitude of the

    asked by Elle on September 4, 2014
  25. Physics

    Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 2.26 × 10-11 m. Determine the magnitude of the

    asked by Elle on September 5, 2014
  26. physics

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25.

    asked by megan on March 3, 2011
  27. AED

    I need help: consider that educational goals and standards reflect the goals and standards of the society in which schools exist. Then provide examples of the similiar as well as the differing roles that home,society, and school play in today's educational

    asked by dawn on October 8, 2008
  28. english

    The subject of this unit is the role of those mythologies which determine the meaning of being male or female in American culture. As always, your aim as a writer is to incorporate what the critics have been arguing into your own thinking, thereby to enter

    asked by Katie on March 16, 2012
  29. 9th grade chem

    Using the following equation Ca(s) + 2C(s) --> CaC2(s) ^ H = -62.8 kJ CO2(g) --> C(s) + O2(g) ^ H = 393.5 kJ CaCO3(s) + CO2 (g) --> CaC2(s) + 2 1/2O2(g) ^ H = 1538 kJ Determine the heat of the reaction (in kJ) for: Ca(s) + C(s) + 3/2O2(g) --> CaCO3(s)

    asked by Gabrielle on December 17, 2010
  30. physics

    Three charges are arranged as follows: +3 mC located on the y-axis at +15 mm; -2.5 mC located on the x-axis at -25 mm; and +4.0 mC located at the origin. Determine the magnitude of the force acting on the charge located at the origin.

    asked by Jamie on February 21, 2010
  31. calculus

    is this correct? use the integral test to determine if this series is convergent or divergent: the series from n=2 to infinity of 1/(n*square root of (ln(n))) I said it was divergent because the integral went to infinity

    asked by john on March 16, 2008
  32. physics

    In the figure , suppose C_1 = C_2 = C_3 = 18.0 \mu F.If the charge on C_2 is Q_2 = 33.0 \mu C, determine the charge on each of the other capacitors.

    asked by c on April 26, 2011
  33. Algebra

    I don’t understand how to solve these last three problems. Can someone please help me? Determine whether the graphs of the given equations are parallel, perpendicular, or neither. (questions 6-8) 6.) y = -2x + 3 2x + y = 7 A: Parallel B: Perpendicular C:

    asked by BreAna on December 20, 2017
  34. geometry

    a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the circumradius and inradius of the smaller circle

    asked by praddy on April 3, 2014
  35. Physics

    Two resistors, 46.0 and 64.0 , are connected in parallel. The current through the 64.0 resistor is 3.40 A. (a) Determine the current in the other resistor. _________ A (b) What is the total power consumed by the two resistors? _________ W Please help!!!!!

    asked by Jim on September 7, 2007
  36. ipc

    A rock is placed in a graduated cylinder to determine its volume. The following data are obtained. What is the volume of the rock? Initial volume of water: 13.7 mL Final volume of water: 28.9 mL

    asked by hey on April 22, 2015
  37. biology

    In sheep, the allele for white wool (A) is dominant over the allele for black wool (a). How would you determine the genotype of a white ram, or male sheep?

    asked by Joey on February 27, 2010
  38. math

    Mary worked 30 hours this week, five of these hours were on Christmas Day (holiday pay). Determine Mary’s gross pay for this week

    asked by ashley on February 11, 2012
  39. Calculus - Series4

    Determine if the following sequence: { (n + 1)^2 / (n^2 + 1) }, is ascending, descending and find the lower bound b OR the upper bound B. (n + 1)^2 / (n^2 + 1) > ((n+1) + 1)^2 / ((n+1)^2 + 1) so the sequence is descending, it's the bounds I don't know how

    asked by Paul on September 20, 2012
  40. Chemistry

    The following volumes of 0.000300 M SCN are diluted to 15.00mL determine the concentration of SCN in each sample after dilution. Sample 0.000300 M SCN(ml) SCN (M) 1 1.50 2 3.50 Can someone please explain how to do this?

    asked by Max on June 8, 2011
  41. physics

    a persons heart and head are 1.3 meter and 1.8 meter above the feet,respectively.determine the potential energy of 0.5 kg of blood in the heart relative to feet and head

    asked by rodel on November 29, 2015
  42. Statistics

    Some IQ scores are standardized with a mean of 100 and a standard deviation of 16. Using the 68-95-99.7 Rule, Determine: 1. What percent of people would have an IQ score of no more than 68. (2).What percent of people would have an IQ score of 100 or above.

    asked by Math help on February 25, 2008
  43. algebra 1

    At Jack's Laundromat, 6 of the washers must be replaced. These washers represent of the total number of washers. If w represents the total number of washers, which equation could be used to determine the value of w?

    asked by Alex on March 20, 2014
  44. physics

    A 10 kg mass moving at 6 m/s strikes a stationary 2 kg mass in an elastic collision. Determine the velocity of each after the collision. 10(6)+2(0)=(10)Vf1+(2)Vf2 60=(10)Vf1+(2)Vf2

    asked by alyssa on January 28, 2016
  45. math

    Rules:Determine wether the two expressions are equivalent.If so,tell what property is applied.If not, explain why. 1)18 x 1 and 18 2)7 + 0 and 7 3)0 + 12 and 0 can someone please explain to me why these expressions are not equivalent. I know that these are

    asked by casey on February 20, 2012
  46. Physics

    determine the distance from earths centre where the force of gravity acting on a space probe is only 11% of the force acting on the same probe at earths surface. Express your answer in terms of earths radius, rE

    asked by Bobbie on October 14, 2008
  47. Geometric & Wave Optics

    when an object is placed 10cm away from a lens; it is found that the formed is 6cm behind the object on the same side of the lens. Determine the focal lenght of the lens. solution 1/v + 1/u = 1/f u=10cm, v=6cm, f=? 6+10/60 = 1/f 70/60 = 1/f by cross

    asked by Matrix School 2 on July 22, 2009
  48. refrigeration

    air in the smoke house has WBT of 20 degree centigrade and DBT of 25 deg.centigrade,determine RH,DPT and % moisture content.What will be the change if the air is heated to DBT of 40 degree centigrade ?

    asked by mohan on July 22, 2016
  49. Maths

    A random sample of 1200 engineers included 48 Hispanic Americans,80 African Americans, and 204 females. Determine 90% CI for the proportion of all engineers that are a) female b) Hispanic Americans or African American

    asked by Nithi on August 19, 2014
  50. survey of mathematics

    The numbers 1-10 are written on a sheet of paper and the ten sheets of paper are placed in a bowl. If one sheet of paper is selected at random from the bowl, determine the probability that the number selected is odd. (Points: 1)

    asked by peta-gaye smith on July 28, 2010
  51. physics

    An electric force moves a charge of +1.80×10-4 C from point A to point B and performs +5.80×10-3 J of work on the charge. (a) What is the change in the electrical potential energy of the charge as it moves from A to B? (b) Determine the potential

    asked by kim on February 13, 2019
  52. math

    Water contained by a dam exits a spill-way 685ft above the base of the dam. Determine the velocity of the water as it strikes the base of the dam if its initial velocity as it leaves the spillway is negligible.

    asked by Bob on September 8, 2016
  53. physics

    Three charges are fixed to an x, y coordinate system. A charge of +19 µC is on the y axis at y = 2.8 m. A charge of -13 µC is at the origin. Last, a charge of +47 µC is on the x axis at x = +2.8 m. Determine the magnitude and direction of the net

    asked by kary on September 2, 2009
  54. Physics

    For each of the following functions describing the net force on a particle, determine any and all positions of equilibrium and characterize each as stable or unstable. (a) F = 4x − 2x3, (b) F = x2 + x − 6, (c) F = 5x − 9. Answer: a. x = 0, unstable;

    asked by Ashley on February 15, 2016
  55. Math (PLEASE HELP!)

    1. The UV index on a sunny day can be modelled by the function y= -0.15(x-13)^2+7.6 , where x represents the time of day on a 24-h clock and f(x) represents the UV index. At what time(s) was the UV index 7? 2. Determine if each system has one, two, or no

    asked by Adam on June 18, 2015
  56. AP Physics B

    Two point charges Q1 and Q2, are located a distance .20 meter apart, as shown above. Charge Q1 = +8.0μC. The net electric field is zero at point P, located .40 meter from Q1 and .20 meter from Q2. Determine the magnitude and sign of charge Q2.

    asked by Alix on February 6, 2013
  57. Math

    A park is open 16 weeks of the year. An equation that models the cost function in thousands is: c(x){5, 00 Determine the profit function for x>0

    asked by Samra on July 16, 2014
  58. physics

    Water flows at 0.58 m/s through a pipe 11 cm in diameter when the pressure is 450,000 Pa. Determine the water velocity & the pressure in the pipe if it shrinks down to 5 cm in diameter. You can assume that the pipe is horizontal & ρwater = 1000 kg/m3.

    asked by help! on April 1, 2018
  59. physics

    Three charges are fixed to an x, y coordinate system. A charge of +20 µC is on the y axis at y = 2.7 m. A charge of -14 µC is at the origin. Last, a charge of +46 µC is on the x axis at x = +2.7 m. Determine the magnitude and direction of the net

    asked by Kellsey on September 3, 2010
  60. geometry

    I honestly need help on this question. Determine whether statement(3)follows from statements(1)and(2)by the law of detachment or law of syllogism.If it does,state which law was used.If it does not,write invalid. (1)If n is an integer,then n is a real

    asked by stef on September 13, 2012
  61. physics

    Three charges are fixed to an x, y coordinate system. A charge of +20 µC is on the y axis at y = 2.7 m. A charge of -14 µC is at the origin. Last, a charge of +46 µC is on the x axis at x = +2.7 m. Determine the magnitude and direction of the net

    asked by Kellsey on September 3, 2010
  62. Circuits 2

    An inductive coil with a resistance R and Inductance L is connected in parallel with a 30ohm resistor. The combination is then connected across a 60hz ac source. If the currents in the coil, resistor and the total are 6,4 and 8A respectively. Determine the

    asked by Student on March 11, 2018
  63. calc

    determine whethere the sequence a(n)=nsinn/n^3 converges or diverges. Explain why it does or does not converge. If it converges find the limit. Sin(n) is always between -1 and 1. So, you have: -1/n^2 < a(n) < 1/n^2 Both the lower bound and the upper bound

    asked by kelly on April 17, 2007
  64. Chemistry

    you were asked to determine the melting point of an unknown compound in order to identify at as one of the compounds you had previously examined. What else could you have done to make sure that your unknown was indeed the compound you believed it to be,

    asked by Ash on December 1, 2010
  65. Chem.

    How can I determine the concentration of HCl remaining in the flask after back titration? Thank you!! I have been given weight of antacid, concentration and volume of HCl and concentration of NaOH. I've done 3 trials and found the average volume of NaOH.

    asked by Help!! on July 7, 2015
  66. physics

    A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s.

    asked by shug on October 1, 2010
  67. calculus

    for each series determine if the series is absolutely convergent and convergent the sum from 0 to infinity of (-1)^n/(the square root of (n+1)) I did the ratio test and got -1, which is less than 0 making it absolutely convergent, but do i need to take the

    asked by sarah on March 2, 2008
  68. algebra

    Shelly has $175 to shop for jeans and sweaters, Each pair of jeans costs $25, each sweater costs $20, and she buys 8 items. Determine the number of pairs of jeans and sweaters Shelly bought.

    asked by mimi on March 30, 2011
  69. Physics

    Determine the magnitude of the vector sum V=V1+V2 and the angle theta(x) which V makes counterclockwise from the positive x-axis. V1 = 34 units and makes a 20 degree angle with the +x axis V2 = 28 units and forms a 3,4,5 triangle with the -x axis

    asked by Tim on August 26, 2014
  70. Physics

    Determine the magnitude of the vector sum V=V1+V2 and the angle theta(x) which V makes counterclockwise from the positive x-axis. V1 = 34 units and makes a 20 degree angle with the +x axis V2 = 28 units and forms a 3,4,5 triangle with the -x axis

    asked by Tim on August 27, 2014
  71. Algebra class!

    You and your date go out for a fancy dinner. The bill comes to $105 and you want to leave a 15% tip. Without using a calculator, determine how much money you should leave for the tip. To find the answer I ……. Describe an alternate way to find the tip

    asked by Urgent! running out of time.... on February 17, 2013
  72. Chemistry

    A student dissolves 22.4 g of sodium phosphate to prepare a 2.98 L solution. Another student then dilutes this solution to 4.90 L. If sodium phosphate completely dissociates, determine the number of mols of each ion in the final solution.

    asked by Alex on December 1, 2014
  73. Math

    Tickets are drawn to determine first prize money is s100, 000. Each succeeding prize paid 60% as much as the ticket before it. What was the prize money for the 6th ticket drawn? Use the appropriate formula. (Answer = $7776)

    asked by Clary F on June 20, 2017
  74. Chemisty

    A 5 μL drop of compound X, a 7 μL drop of compound Y, and a 15 μL of compound Z are placed in a closed container with 5 mL water and 2.5 mL air. The system is equilibrated at 25°C. Determine the fraction of the total X, Y, and Z mass associated with

    asked by Anonymous on September 2, 2014
  75. Math

    There are 8 standard classifications of blood type. An examination for prospective laboratory technicians consists of having each candidate determine the type for 3 blood samples. How many different examinations can be given of no 2 of the samples provided

    asked by Gina on July 28, 2013
  76. Math-probability

    There are 8 standard classifications of blood type. An examination for prospective laboratory technicians consists of having each candidate determine the type for 3 blood samples. How many different examinations can be given of no 2 of the samples provided

    asked by Tom on July 28, 2013
  77. English

    I urgently need the help of a science expert to help me determine the possible scientific objectives (biochemical) of a project on biodiversity on water. What else can be included? I wrote them but I need your check: Biodiversity in water and waterways in

    asked by Henry2 on January 26, 2012
  78. Physics

    Could someone help explain this problem to me . . . Carbon 14 has a half-life of 5700 year, scientist use this fact to determine the age of things made of organic material. Suppose the average page of a book containing aprox. 0.5mg of Carbon 14 is put into

    asked by Andy on December 9, 2007
  79. Physics

    As an astronaut, you observe a small planet to be spherical. After landing on the planet, you set off, walking always straight ahead, and find yourself returning to your spacecraft from the opposite side after completing a lap of 24.0 km (assume this to be

    asked by Anonymous on February 11, 2014
  80. Fluid Mechanics

    Water at 600F flows steadily through a horizontal circular divergent duct and discharges into the atmosphere as shown. A manometer with a fluid of SG=2.0 is placed between the two cross-sections with diameters D1 = 0.5 ft and D2 = 0.7 ft. Assuming inviscid

    asked by Bob on June 11, 2012
  81. Physics

    An electronic motor is revolving at 2000rpm. After 3sec, it is moving at 150rpm. Determine the angular acceleration. What is angular momentum of the electric motor if the rotational inertia is 18.kg.square meter in initial velocity? In final velocity? What

    asked by Bob on December 16, 2012
  82. physics

    Three charges are fixed to an xy coordinate system. A charge of +25C is on the y axis at y = +2.7 m. A charge of -16C is at the origin. Lastly, a charge of +66C is on the x axis at x = +2.7 m. Determine (a) the magnitude and (b) direction of the net

    asked by John on September 28, 2012
  83. Physics help please!!

    As shown in the figure below, two masses m1 = 4.40 kg and m2 which has a mass 80.0% that of m1, are attached to a cord of negligible mass which passes over a frictionless pulley also of negligible mass. If m1 and m2 start from rest, after they have each

    asked by Young on October 29, 2017
  84. Physics

    Consider a conducting spherical shell with inner radius b = 0.862 m and outer radius c = 1.21 m. There is a net charge q2 = 3.82 ìC on the shell. At its center, within the hollow cavity, there is a point charge q1 = 2.89 ìC. Determine the flux through

    asked by Alicia on March 20, 2011
  85. Physics

    A point charge of -14nC and +12nC is located 12cm along the x-axis. Determine the magnitude and direction of the electric field intensity at point P at the mid-point and 8cm perpendicular from the x-axis: p | | 8.0cm | | -14nC.---------------. 12 nC 6cm

    asked by Eddie on November 24, 2010
  86. health

    choose a tv show that you enjoy and use the chart to emanine how the characters show empathy toward one another.which actions show compassion?which one don't?once you've completed the chart,pick one sence from the episode and determine how the characters

    asked by odalys on March 24, 2011
  87. Physics

    Consider two vectors F~1 with magnitude 69 N inclined at 177◦ and F~2 with magnitude 58 N inclined at 286◦, measured from the positive x axis with counterclockwise positive. What is the magnitude of the resultant vector F~1 + F~2 ? Draw the vectors to

    asked by Sophia on October 15, 2016
  88. programming

    The village of Ringwood conducted a census and created records that contain household data, including income. Ringwood has exactly 75 households. Write a program into which a village statistician can enter each of the 75 household income values, and

    asked by stephanie on March 28, 2013
  89. physics

    A 50-kg box is being pushed a distance of 7.1 m across the floor by a force whose magnitude is 175 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.19. Determine the work done on the box by each of the four

    asked by Anonymous on March 11, 2014
  90. chemistry

    The basicity constant of pyridine can be expressed as pKb = 8.75 what will be the pH of a 1M (1 mole per liter) solution of pyridine in water? Py + HOH ==> PyH^+ + OH^- Kb = (PyH^+)(OH^-)/(Py) Change pKb to Kb, plug in x for (PyH^+) and (OH^-) and 1 for

    asked by howie on August 5, 2007
  91. Science

    Megan wants to determine if an electrical circuit has electricity flowing through it. Which of the following evidence is proof that the circuit has an electrical current? a)The circuit is a closed loop. b)A light bulb is lit in the circuit. c)The circuit's

    asked by Isabella please help me on April 4, 2012
  92. Physics

    A father (mF = 83 kg) and his daughter (mD= 43 kg) stand on a flat frozen lake of negligible friction. They hold a 13 m long rope stretched between them. The father and daughter then pull the rope to bring them together. If the father is initially standing

    asked by Jessica on November 1, 2010
  93. Physics

    As shown in the figure below, two masses m1 = 4.40 kg and m2 which has a mass 80.0% that of m1, are attached to a cord of negligible mass which passes over a frictionless pulley also of negligible mass. If m1 and m2 start from rest, after they have each

    asked by Young on October 26, 2017
  94. Physics

    A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0

    asked by annemarie on August 8, 2009
  95. physics help

    The magnitude of the velocity of a particle which starts from rest 2 ft below the origin when t = 0 and moves along a vertical axis is directly proportional to the time after starting. The displacement of the particle during the time interval from t = 1

    asked by stan on January 20, 2011
  96. Pre-Calculus

    1) Use a graphing utility to obtain the graph of the function. Give the domain of the function and identify any vertical or horizontal asymptotes. x+4/ x^2+x-6. 2) Use a graphing utility to graph the function and determine the x-intercepts and B. set y=0

    asked by Addy on April 8, 2011
  97. Physics

    A 2 kg pendulum bob is hanging from a 30 cm long piece of string. If the pendulum bob is allowed to move in circular motion in a horizontal plane, determine the tension in the string if the angle the string makes with the vertical is 37 degrees. Need Step

    asked by Trevor on November 18, 2007
  98. math

    A rental truck costs $50 plus $0.50 (67) per mile. (a) Write an equation that gives the cost C of driving the truck x miles. (b) Use the intersection-of-graphs method to determine the number of miles that the truck is driven if the rental cost is $80. (c)

    asked by Anonymous on May 22, 2013
  99. physics

    please help :/ Three charges are fixed to an xy coordinate system. A charge of +25C is on the y axis at y = +2.7 m. A charge of -16C is at the origin. Lastly, a charge of +66C is on the x axis at x = +2.7 m. Determine (a) the magnitude and (b) direction of

    asked by antonio on October 11, 2012
  100. Physics

    A block of mass 2.30kg is accelerated across a rough surface by a rope passing over a pulley. a) The tension in the rope is 12.4N, and the pulley is 11.2cm above the top of the block. The coefficient of kinetic friction is 0.415. Determine the acceleration

    asked by Presley on October 7, 2015

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