Angel

Newest questions and responses by Angel
  1. Philosophy

    In history of science, Why is the medieval period referred to as "Dark Ages".

    asked on December 15, 2018
  2. mythology

    Can someone tell me if god is real or if it is just a myth? I have a question on my homework and it says something about god but I don't know like anything about it.

    asked on December 12, 2018
  3. pre-algebra

    (01.03 LC) What is the value of 4 to the power of 6 over 4 to the power of 8? (1 point)

    asked on November 26, 2018
  4. Chemistry

    An ammonium salt of an alkanoic acid gain 60.5% of carbon 6.5% of hydrogen gas. If 0.309g of the salt yields 0.0313g of nitrogen. Determine the empirical formula of the salt

    asked on November 13, 2018
  5. Chemistry

    Calculate the volume of CO2 produced at S.t.p when 25cm3 of 0.25mol/dm3 Hcl reacts with Na2Co3.

    asked on November 11, 2018
  6. math

    6x−10y=730 7x-9=y Solve the system by substitution.

    asked on October 21, 2018
  7. Physics

    1. Two people are pushing a disabled car. One exerts a force of 200 N East, the other a force of 250 N East. What is the net force exerted on the car? 2. Two hockey players strike a puck simultaneously from opposite sides. Red #3 hits it with 40 N of force

    asked on October 11, 2018
  8. physics

    A train moves along a straight track towards a road crossing with a speed of 85.0 km/hr. At the moment the front car of the train arrives at the crossing the conductor applies the brakes which decelerates the train at a constant rate. If the train is 6.00

    asked on September 26, 2018
  9. Physics

    How fast would a bird move in the air if it were flying with a speed of 50 m/h directly into a strong wind of 50 m/h? a) 50 m/h b) 100 m/h c) 0 m/h What is the resultant of a 6 N east force pushing on an object and a 8 N force acting on an object at the

    asked on September 26, 2018
  10. Physics

    How fast would a bird move in the air if it were flying with a speed of 50 m/h directly into a strong wind of 50 m/h? a) 50 m/h b) 100 m/h c) 0 m/h* What is the resultant of a 6 N east force pushing on an object and a 8 N force acting on an object at the

    asked on September 26, 2018
  11. Physics

    What is the acceleration of a mechanical part that moves from 0 to 10 m/s in 1 s? a.10 m/s b.20 m/s c.10 m/s2^

    asked on September 19, 2018
  12. History

    I don't know where to start and how I should word this. Please Help! In the Declaration of Independence, who (specifically, name the person) do the Colonists blame for the problems the Colonies are having with Britain? How do you know? Why did they phrase

    asked on August 31, 2018
  13. Math

    THE INPUT IS 25 AND THE OUTPUT IS 15 THE NEXT ONE IS INPUT 30 OUTPUT 18 WHAT IS THE OPERATIONS PLEASE HELP!

    asked on August 9, 2018
  14. science

    differences between rotation and revolution of the earth

    asked on June 19, 2018
  15. civic

    advantages of confedral constitution

    asked on June 19, 2018
  16. Chemistry

    If you have 10.00 mL of 0.5875 M H3PO4, how many mL of 0.2625 M NaOH are needed to reach the point of complete neutralization?

    asked on May 17, 2018
  17. chemistry

    The basicity of tetraoxosulphat(iv)acid is 2 explain this statement with an equation showing the reaction between the acid and potassium hydroxide

    asked on May 6, 2018
  18. math

    How many ways can I select 5 pieces of fruit from apples, oranges, strawberries and pears (I have at least 5 of each)?

    asked on April 20, 2018
  19. Math

    There are 20 red, 20 green and 20 blue balls in an urn. In how many different ways can 10 balls be selected? How many ways are there if there are 6 red balls instead of 20?

    asked on March 27, 2018
  20. Chemistry

    Suppose that a device is using a 5.00-mg sample of silicon that is doped with 1 × 10-5% (by mass) phosphorus. How many phosphorus atoms are in the sample?

    asked on March 6, 2018
  21. Health

    1. Identify a common defense mechanism that protects you from an uncomfortable feeling. A. reaction formation *** My Answer B. abstinence C. mature behaviors D. acceptance 2. Anger is a normal emotion that all humans feel at some time. It is important to

    asked on February 9, 2018
  22. Probability

    Based on experience, the manager of a credit card company reports that three out of every ten credit card applications are disapproved. Use the normal approximation to determine the probability that at most 50 of 200 new credit applications will be

    asked on January 23, 2018
  23. Probability

    Suppose that the lifetime of a farm tractor follows a normal distribution with a mean of eight years and a standard deviation of 1.7 years. If the manufacturer is willing to replace only 5% of the tractors that fail within the warranty period, how long

    asked on January 23, 2018
  24. Probability

    Gani, a regular coffee drinker, goes to his favorite coffee shop every night for a cup of hot cappuccino. The amount of time that he stays in his favorite spot is normally distributed with a mean of 45 minutes and a standard deviation of 5 minutes. Above

    asked on January 23, 2018
  25. Probability

    Suppose that a drug is known to be 90% effective in treating a certain disease. What is the probability that it will be successful in treating seven to ten out of 12 patients with the disease?

    asked on January 23, 2018
  26. Physics

    A charge +q is at the origin. A charge -2q is at x = 6.30 m on the +x axis. (a) For what finite value of x is the electric field zero? (b)or what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r =

    asked on January 21, 2018
  27. Math

    Why did they remove my question about youtube? That's what i'm learning in school

    asked on January 10, 2018
  28. Probability

    In a university, 30% of the students major in Business management, 25% major in mathematics and 10% major in both business management and mathematics. A student from this university is selected at random. A) what is the probability that the student majors

    asked on January 7, 2018
  29. Physics

    A +33.0 nC charge is placed at the origin of an xy-coordinate system, and a −25.0 nC charge is placed at the point (1.500 m, −0.0540 m). (a) Determine the magnitude and the direction of the force that the positive charge exerts on the negative charge.

    asked on January 6, 2018
  30. math

    numbers of ways a person can travel from a to c via b, if there are 3 routes from a to b and 5 routes from b to c

    asked on January 6, 2018
  31. Statistics

    A committe of 5 members will be chosen from a group of 10 teachers and 5 students. What is the probability that the committee will have A) all teachers? B) 3 teachers and 2 students? C) 3 or 4 teachers?

    asked on January 6, 2018
  32. Statistics

    A committe of 5 members will be chosen from a group of 10 teachers and 5 students. What is the probability that the committee will have A) all teachers? B) 3 teachers and 2 students? C) 3 or 4 teachers?

    asked on January 5, 2018
  33. math

    The square root of the product of 4 and a number is 26

    asked on January 2, 2018
  34. Calculus

    water drips into an upside down cone, whose diameter at the base is 10 cm , and whose height is 15 cm. If the water is dripping int a rate of 2cm^3 per minute, how fast is the height rising.

    asked on December 14, 2017
  35. Math please help !!!!!!

    How many blocks 1 inch on each edge would it take to fill a shoe box that is 12 inches long , 6inches wide , and 5 inches high ?

    asked on December 13, 2017
  36. linear algebra

    Find the scalar equation for the plane passing through the point P=(0, 2, −1) and containing the line L defined by x = 2+t y = 4+t z = −6+7t

    asked on December 3, 2017
  37. linear algebra

    Let L1 be the line passing through the point P1=(9, 0, 0) with direction vector →d1=[3, 2, −2]T, and let L2 be the line passing through the point P2=(−10, 8, 4) with direction vector →d2=[3, 0, 2]T. Find the shortest distance d between these two

    asked on December 1, 2017
  38. Algebra

    1.What is the slope of the line that passes through the pair of points (3,8) and (9,5)? Options -2 2 1/2 -1/2 2.Write an equation in point-slope form for the line Through the given point with the given slope. (8,3);m=5 Options Y+3=5(x-8) Y+3=5x-8

    asked on November 29, 2017
  39. Linear Algebra

    Let L be the line with parametric equations x = 2+3t y = 3−2t z = 2+t Find the shortest distance d from the point P0=(−5, 1, −4) to L, and the point Q on L that is closest to P0. Use the square root symbol '√' where needed to give an exact value

    asked on November 26, 2017
  40. Physics

    A gas is kept at a pressure of 4.00 × 105 Pa and a temperature of 30.0 °C. When the pressure is reduced to 3.00 × 105 Pa and the temperature raised to 40.0 °C, the volume is measured to be 0.45 × 10^−4 m^3. Estimate the original volume of the gas. I

    asked on November 18, 2017
  41. Physics

    The density of copper is 8.96 g cm^−3 and its molar mass is 64 g mol^−1. The mass of an atom of copper is 1.1*10^-22 g Determine the number of copper atoms per cubic metre.

    asked on November 18, 2017
  42. Math

    Pradip and pam each have apple slices and orange slices. The ratio of apple slices to the total number of slices is 4 to 11. The ratio of the total number of slices to orange slices on Pam's plate is 13:6. Neither person has more than 20 total slices. Who

    asked on October 17, 2017
  43. Linear Algebra

    Given the following matrices A and B, find an invertible matrix U such that UA = B: A and B are 4x4 matrix and i have to find U. I was wondering how i would do this ie. the steps. if you could be as detailed as possible that would help me. I wanted to try

    asked on October 11, 2017
  44. Physics

    A train slows down as it rounds a sharp horizontal turn, going from 86.0 km/h to 44.0 km/h in the 13.0 s that it takes to round the bend. The radius of the curve is 140 m. Compute the acceleration at the moment the train speed reaches 44.0 km/h. Assume the

    asked on October 10, 2017
  45. Linear Algebra

    Given the following vector X, find a non-zero square matrix A such that AX=0: X=[2 -5 3]^T Im not sure how i would find the sqare matrix a?

    asked on October 2, 2017
  46. Calculus

    Use the given graph of f to find a number δ such that if 0 < |x − 3| < δ then |f(x) − 2| < 0.5. since i cannot put up the graph ill put the coordinates (2.6,1.5) (3,2) (3.8,2.5) Please help im not sure how to solve this

    asked on September 25, 2017
  47. Physics/Math

    Prove cos^2 α + cos?^2 β + cos^2 γ = 1 . Thank You

    asked on September 24, 2017
  48. Physics

    I m doing an assignment and this is what is asks: (c) Find the sum of the squares of the cosines of the corresponding coordinate direction angles found above. (Measure the cosines of the corresponding coordinate direction angles from the x-y plane.) Im not

    asked on September 22, 2017
  49. History

    How did John Calhoun react to the Tariff of 1828? A. He used his power as Vice President to influence President Jackson to oppose the tariff. B. He led a charge to impose sticker regulations on the second bank of the United States. C. He devised a force

    asked on August 29, 2017
  50. science

    A coach tells his little league players that hitting a 0.275 batting average, within 7% percentage error, means that they had a really great season. Seven year old Tommy ended the season hitting a 0.258 batting average. According to his coach, did he have

    asked on August 22, 2017
  51. Math

    A rectangular garden plot 16 by 24 meters is to be bordered by a strip of uniform width x meter so as to double the area. Find x.

    asked on August 1, 2017
  52. HVAC

    Two HVAC/R technicians are discussing the tape used in HVAC/R repairs. Technician A says that cloth duct tape is preferred for use in attics. Technician B says that UL 181 tape is normally required for duct closing systems. Which one of the following

    asked on June 13, 2017
  53. Math

    Simpilfy the radical expression by rationalzing the denoiminator? 3/sqrt15 a)sqrt45/15 b)sqrt15/5 c)5sqrt15*** d)sqrt3

    asked on June 10, 2017
  54. Math

    What are the solutions of the system? y=x^2+3x-4 y=2x+2 a) (-3,6) and (2,-4)** b) (-3,-4) and (2,6) c) (-3,-4) and (-2,-2) d) no solutions

    asked on June 10, 2017
  55. Science (soon if so)

    Over the years technology has gotten a) smaller**** b) heavier c) less complicated d) more expensive What is nanotechnology? a) Nanotechnology is engineering new elements by changing their atoms***** b)Nanotechnology is a way to lengthen radio waves and

    asked on June 8, 2017
  56. Pre- Algebra

    If you were to roll a fair number cube 120 times, how many times would you expect to roll a 4 based on theoretical probability

    asked on May 19, 2017
  57. geography

    Explain the effects of the poor service delivery. There must evidence that i actually investigate the poor service delivery physically where possible. Explanation must be with regard to social or Economic or Environmental problem

    asked on April 29, 2017
  58. Microbes and society

    In Chapter 9 of the Bible, in the book of Exodus, the sixth plague of Egypt is described in this way: “Then the Lord said to Moses and Aaron, ‘Take double handful soot from a furnace, and in the presence of Pharaoh, let Moses scatter it toward the sky.

    asked on April 21, 2017
  59. Algebra

    Check my answer- Solve the system of equations algebraically. Show all of your steps. Y=x^2+2x Y=3x+20 My answer: X^2+2x+3x+20 X^2-x-20 (x-5),(x+4)=0 x=5, x=-4 y=35, y=8 Thank you!

    asked on April 4, 2017
  60. Maths

    the angles of of evolution of the top of a hill from the City centres of two towns on either side of the hill are observed to be 30° and 60° respectively. if the distance of hill of the top from the city centre of first is 9 kilometre find in

    asked on March 22, 2017
  61. Physics

    A 5g bullet is fired horizontally and hits an 8kg block of wood (initially at rest) which can move freely. The wood and the bullet move with a velocity of 0.50 m/s after impact. What is the initial velocity of the bullet?

    asked on March 14, 2017
  62. Physics

    A 5 gram bullet is fired horizontally and hits an 8 kilogram block of wood (initially at rest) which can move freely. The wood and the bullet move with a velocity of 0.50 m/s after impact. What is the initial velocity of the bullet?

    asked on March 14, 2017
  63. Math

    The pitch of a screw is the distance between its threads. With each complete rotation, the screw goes in or out a distance equal to its pitch. If the pitch of a screw is 1/17 inch, how far will it go into a piece of oak when it is turned 14 complete

    asked on March 13, 2017
  64. Math

    If a recipe calls for 4 eggs for 8 people how many eggs would it be for 32 people

    asked on February 23, 2017
  65. Calculus-derivatives

    At what points on the graph of f(x)=6x^2+4x-9 is the slope of the tangent line -2?

    asked on February 8, 2017
  66. Chemistry

    1.38 mol HCl and 2.9 mol NaOH react accord- ing to the equation HCl + NaOH −→ NaCl + H2O . If the limiting reactant is HCl, determine the amount of excess reactant that remains. Answer in units of mol.

    asked on February 7, 2017
  67. Chemistry

    1.38 mol HCl and 2.9 mol NaOH react accord- ing to the equation HCl + NaOH −→ NaCl + H2O . If the limiting reactant is HCl, determine the amount of excess reactant that remains. Answer in units of mol.

    asked on February 7, 2017
  68. Math

    My numerator is 2 less than my denominator I am more than 1/2 what fraction can i be?

    asked on February 5, 2017
  69. calculus

    define f(x)={x+a if x>2 {-1 if x=2 {ax+b if x

    asked on January 29, 2017
  70. math geometry

    Find the area of the triangle defined by the coordinates (-3, -4), (-7, 0), and (-3, 4).

    asked on January 24, 2017
  71. science

    Numerical problem : The dimensions of a certain water tank are 8m x 6m x 4m. What is the pressure at the bottom of the tank, if the tank is half filled?

    asked on January 15, 2017
  72. Math

    If the coefficient of sliding friction for steel on ice is 0.05, what force is required to keep a man weighing 150 lbs moving at constant speed along ice?

    asked on January 15, 2017
  73. Dynamics

    A level fight bomber flying at 300 ft/s releases a bomb at an elevation of 6400 ft. Approximately how long before the bomb strikes the earth?

    asked on January 15, 2017
  74. Dynamics of rigid bodies

    a stone is thrown upward with a velocity of 40m/s.Determine the time of the stone when it is at a height of 10m and is moving downwards.

    asked on January 6, 2017
  75. Chemistry AP

    How many mL of0.4M AgNO3 solution must be added to 200mL of0.4 M NaI in order to for 11.7 grams of AgI precipitate?

    asked on December 28, 2016
  76. Science

    A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The

    asked on December 2, 2016
  77. math

    Put the following decimals and fractions in order from greastest to least: 0.15, 2/3, 3/5, 0.25, 1 1/8

    asked on November 29, 2016
  78. Analytical chemistry

    Calculate the expected concentrations of vitamin B6 and caffeine in the stock solution assuming exactly 0.0506 g of pyridoxine hydrochloride (vitamin B6) and 0.1253 g of caffeine are dissolved in a 100 mL volumetric flask.

    asked on November 24, 2016
  79. Mathematics

    The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. plzzzzzzzzzzzzz helppppppppp on thisssss. On my previous question I even showed my work

    asked on November 17, 2016
  80. Math

    The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. Since no one looked at my previous work.................

    asked on November 17, 2016
  81. Math

    The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. My Work: Step 1: a^2 + b^2 = c^2 =(x-1)(x-1) x-1 equals to all the sides of the cube Step 2: a^2 + b^2 = c^2

    asked on November 17, 2016
  82. Business Law

    Can anyone please help? Covenants not to compete (noncompete agreements) are generally legal in most states as a matter of employment contract law as long as: Choose All that APPLY: a. they are not excessive in the amount of time they run b. the hired

    asked on November 13, 2016
  83. Geometry

    In Parallelogram PARK, angle P = (7x) degree angle A = (3x - 20) degree angle K = (5y - 10) degree. What is x + y?

    asked on November 12, 2016
  84. math

    Show me how to make $0.60 in two ways,without using quarters or pennies

    asked on October 20, 2016
  85. Analytical chemistry

    Calculate to four decimal places the mass of pure dry CaCO3 required to make 1 L of a 1000 ppm Ca stock solution.

    asked on October 20, 2016
  86. MATH

    A dietician is planning a snack package of fruit and nuts. Each ounce of fruit will supply zero units of​ protein, 3 units of​ carbohydrates, and 2 unitss of​ fat, and will contain 20 calories. Each ounce of nuts will supply 2 units of​ protein, 11

    asked on October 19, 2016
  87. 6th grade math

    If someone can please help me i keep re reading my mathbook I need help i tried I'm unsure: Is there a relationship between area and perimeter? (My answer : yes they both are meadurements one reads the outside and one inside.) Does changing one mean the

    asked on October 18, 2016
  88. algebra

    write an explicit formula for the nth term an for 17,20,23,26

    asked on October 17, 2016
  89. Math

    Find the quotientshapes to the nearest hundreth. 5.8 divided by 30.8 Is this correct so I round 5.8 to 6 and 30.8 to 31 ?

    asked on October 11, 2016
  90. 6 grade math

    Find the area of the figure at right in at least two different ways. Explain how you get your answer with diagrams and remember to label them with the correct units. So the image is a 10cm by 15cm and smaller box attach to the side. Like an London shape .

    asked on October 11, 2016
  91. Algebra

    Find all points on the line x = 3 that are 8 units from the point (10,-10).

    asked on October 11, 2016
  92. Statistics

    Can anyone help me with this? Which of the following statements is true about a 99% confidence interval? a. The interval contains 99% of the population. b. The probability that the population mean is in the interval is 99%. c. The interval is wider than a

    asked on October 8, 2016
  93. English

    When summarizing the of a plot, one should notice the key ideas about how the conflict builds.

    asked on October 6, 2016
  94. English

    Which are features of myths? Check all that apply. supernatural gods or animals fantastic settings humorous elements that entertain the reader an attempt to explain the origin of the universe characters found in everyday life conflicts between worlds,

    asked on October 6, 2016
  95. Math graphs,dot,ven

    I did a bar graph I think it is easier than dot and ven diagram. Am I correct because ven diagram there are no similarities and dot is to long.the problem asks as follows. Display the data using a dot plot,bar graph or vennot diagram.decide which data

    asked on October 2, 2016
  96. Trigonometry

    find an equation of the line passing throug (2,6) and is inclined at an angle 60 degrees counterclockwise from the horizontal

    asked on October 1, 2016
  97. analytical chemistry

    Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water. Here I want the concentration of nitrogen in ppm.

    asked on September 22, 2016
  98. analytical chemistry

    Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water.

    asked on September 21, 2016
  99. math

    How many centimeters would represent 40 kilometers if you were using a scale of 1 cm = 1 m? 1 cm = 1 m 40 km = X x = 1 x 40 x = 40 cm

    asked on September 14, 2016
  100. math

    What distance on the ground does 5 inches on a map represent if the scale is 1 in. = 1.5 mi.? 1 inch = 1.5 miles 5 inches =X x- 1.5 x5 x= 7.5 miles

    asked on September 14, 2016

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