Most popular questions and responses by Simon
  1. Science

    Why is the use of the inquiry process a practical way to approach science? 5 points My Answer: The inquiry process is a practical way to approach science because the inquiry process begins by asking questions and moving on from there. In science it is

    asked on September 28, 2015
  2. language arts

    which element is shared in both zoos joys or jails and why do we need zoos?

    asked on May 6, 2015
  3. math

    A gas has weight of 5 pounds and a volume of 100 cubic feet,What is the specific volume of the gas? 0.05ft/sup>/lb 5ft3/lb 20ft3/lb 100ft3/lb

    asked on December 13, 2017
  4. S.S

    Lesson 10: Unit Test CE 2016 Social Studies 8 B Unit 6: Meeting New Challenges What was a common thread in the fall of communist regimes throughout Eastern Europe? A) a decline in education and health care B) poor economies and demands for more rights C) a

    asked on May 11, 2018
  5. history

    What was the significance of the Soviet Union’s invasion of Korea during World War II?

    asked on March 12, 2019
  6. Chemistry

    Based on the balanced equation Al2S3 + 6H2O → 2Al(OH)3 + 3H2S calculate the number of excess reagent units remaining when 4 Al2S3 formula units and 30 H2O molecules react? Molar Mass (g/mol) Al2S3 150.16 H2O 18.015 Al(OH)3 75.361 H2S 34.082 Avogadro's

    asked on February 20, 2009
  7. algebra 1

    The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at

    asked on May 19, 2016
  8. HVAC

    Two HVAC technicians are discussing the properties of water.Technician A says that if the pressure of water is raised,the boiling point will decrease.Technician B says that placing water in a vacuum will cause its boiling point to increase.Which of the

    asked on December 13, 2017
  9. Chemistry

    What property of tetraoxosulphate vi acid made it suitable for preparing trioxonitrate v acid

    asked on March 25, 2019
  10. history

    What impact did the evacuation of American troops in Vietnam have on the United States?

    asked on March 12, 2019
  11. HVAC

    two HVAC technician are discussing units of energy.Technician A says that a BTU is defined as the work performed by a force of 1 neton[N] moving and object over a distance of 1 meter[M].Technician B says that that if you have a 60 watt light bulb that has

    asked on December 13, 2017
  12. Math

    the area of a parallelogram is 120. of the base is reduced one-half of its original length, and it height is quadrupled, what is the new area 30 60 120 240**

    asked on May 1, 2018
  13. physics

    A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?

    asked on July 16, 2013
  14. Physics

    A force of 9.0N is applied to a body at rest on a smooth horizontal surface. If the body has a mass of 18.0kg and it moves in the direction of the force, find the work done in. a. The first four second. b. The fourth second ? Urgent answers pls

    asked on February 14, 2018
  15. chemistry

    balance: Al2(CO3)3 --> Al2O3 + CO2 i don't know how to do the reactant side so i can figure out the product side...

    asked on January 9, 2013

    3)-A 9-kg block is held by a pulley system shown in fig. What force must the person exert in the following cases: a) to hold the block at rest. b) to lower it at 2m/s. c) to raise it with an acceleration of 0.5 m/s2? Ignore the mass of small pulley.

    asked on March 21, 2016
  17. Musina high

    Identify and explain five recommendation to address teenage pregnancy

    asked on August 10, 2019
  18. math

    the distance between 2 station A and B is 230 km .two car start simultaneously from A and B in the opposite directions and the distance between them after 3 houra is 20 km. If the speed of one car is less than that of the other by 10 km per hour, find the

    asked on March 8, 2012
  19. Edu tech

    Can you please check this Probability can be used to determine the likelihood of specific ________. A:games B:occurrences C:questions D:opportunites D is my answer

    asked on October 1, 2015
  20. math

    A gauge pressure of 30 psig is equivalent to an absolute pressure of______. 15.3 psia 30 psia 44.7 psia 64.7 psia

    asked on December 13, 2017
  21. Physics

    On June 9, 1988, Sergei Bubka broke the world pole-vaulting record for the 8th time in four years by attaining a height of 6.14 m. How long did it take Bubka to return to the ground from the highest part of his vault?

    asked on October 14, 2014
  22. MATh

    Prove by mathematical induction that 1+3+5+7+......+(2n-1)=n²

    asked on March 29, 2018
  23. physics

    A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 29 N. Starting from rest, the sled attains a speed of 2.1 m/s in 9.6 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

    asked on July 8, 2013
  24. Maths

    How do you get to calculate the possible winning numbers for Ghana lotto

    asked on June 30, 2019
  25. life orientation

    Design a newspaper article to warn people against engaging in fraud and corruption

    asked on May 11, 2016
  26. Physics

    (a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it died, determine the age of the fossil? Half life of Carbon-14 is 5700 years. (b)How much Carbon-14 will be present in the sample

    asked on April 24, 2017
  27. physics

    A car of mass m is going around a circular turn of radius R, which is banked at an angle β with respect to the ground. Assume there is friction between the wheels and the road. Let μs be the coefficient of static friction and g the magnitude of the

    asked on November 1, 2016
  28. science

    how many seconds will it take for a saterllite to travel 450 km at rate of 120 m/s?

    asked on September 10, 2012
  29. chemistry HWK MAKES NO SENSE

    balance: H3PO4 + Mg(OH)2 → Mg3(PO4)2 + H2O

    asked on January 7, 2013
  30. physics

    Acceleration of a Mass in a Pulley System Block 1 of mass m1 slides on a frictionless plane inclined at angle θ with respect to the horizontal. One end of a massless inextensible string is attached to block 1. The string is wound around a frictionless

    asked on November 15, 2016
  31. ashworth

    a gas has weight of 5 pounds and a volume of 100 cubic feet.What is the specific volume of this gas? 0.05 ft3/lb 5ft3/lb 20ft3

    asked on December 13, 2017
  32. HVAC

    the density of a solid or liquid material divided by the density of water is called the_____ of the material. latent heat specific volume critical point specific gravity

    asked on December 13, 2017
  33. math

    Logarithm!!! Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c) log(12y) = 2 log(2) + log(3y) (d) log(5y) = log(20y) – log(4) (e) log(x) = log(5x) – log(5) (f) ln(25) = 2ln(5) (g) ln(1) =

    asked on April 16, 2010
  34. Dynamics

    A car is traveling at a speed of 80 km/h when the brakes are suddenly applied, causing a constant deceleration of 3.24 m/s2. Determine the time required to stop the car and the distance traveled before stopping

    asked on November 16, 2016
  35. Excel

    In Excel, you can format data in cells as all of the following EXCEPT __________.

    asked on March 21, 2019
  36. physics

    solve for H: V=LWH

    asked on January 26, 2009
  37. Maths

    What's the loan + interest for the following 1. 500naira for two weeks at 100naira per week. 2. 2000naira for 3weeks at 1naira in each 10naira per week

    asked on February 3, 2019
  38. government

    what are the limitation to a citizens rights

    asked on May 8, 2019
  39. Maths

    What's the loan + interest for the following 1. 500naira for two weeks at 100naira per week. 2. 2000naira for 3weeks at 1naira in each 10naira per week

    asked on February 3, 2019
  40. Algebra

    Ann, Matt and Zack are working for a cleaning company. Together, they can clean a house in 2 hours. If Ann does the job alone she can finish it in 5 hours. If Matt does the job alone he can finish it in 6 hours. How long will it take Ann and Zack together

    asked on May 28, 2016
  41. Math

    The road is 7m wide. The corner is in the shape of a quarter of a circle. the inside radius of the corner is 70m. Ali walks rounds the corner on the inside, from A to B. Obi walks round the corner on the outside, from C to D. How much further does obi walk

    asked on June 14, 2018
  42. Math

    the larger angles of a rhombus are twice the smaller angle of the rhombus. if the shorter diagonal is 20, find the perimeter of the rhombus

    asked on December 10, 2013
  43. Chemistry (Insulated Vessel, temperature and vol.)

    Insulated vessel has two compartments separated by a membrane. One side is 1 kg of steam at 400 C and 200 bar. The other side is evacuated. The membrane ruptures filling the entire volume. The final pressure is 100 bar. Determine the final temperature of

    asked on October 2, 2012
  44. Chemistry (Internal Energy)

    5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1, where the specific internal energy U(1) is = 2710 [kJ/kg] to state 2, where U(2) = 2660 [kJ/kg]. During the process, there is heat transfer to the steam with a

    asked on October 2, 2012
  45. Physics 30

    It takes a plane flying at 150 km/h 3.0 minutes to circle around a cloud at an altitude of 3000m. What is the diameter of the cloud?

    asked on January 25, 2011
  46. Math - Normal and Binomial Distribution

    An unbiased dice is thrown 10 times. Let X be the number of sixes obtained. Find: C) P(X

    asked on May 10, 2016
  47. Math

    A cylindrical tube is open at both ends.the internal diameter tube 10.4cm and its length is 25cm. If the thickness of the tube 8mm everywhere,find the total surface of area of the tube.

    asked on February 5, 2013
  48. math

    A plane is flying at 32,460 feet. To avoid some turbulence, the plane ascends 1645 feet. It then descends 3 5 of its new height to prepare for landing. What are the heights that the plane will be at after it ascends to avoid turbulence and after it

    asked on October 3, 2019
  49. Home Economics


    asked on March 22, 2019
  50. Physics

    A ball of mass m1=3kg moving south at 6m/s collides with a ball of mass m2=2kg initially at rest. The incoming ball is deflected in the direction 60 degrees S of W and the target ball moves off at 25 degrees E of S. Consider that the Collison happens on a

    asked on May 1, 2016
  51. Math

    Which fractions are equal to -9/36? a. 3/-12 b. -1/4 c. -4 d. 3/12 e. 1/4 f. 4

    asked on October 3, 2019
  52. Math

    1a. Draw a circle of 15mm b. Construct 2diameters at angles to each other c. Construct two more 2diameters bisecting the angles between those drown d. Join the ends of the 2diameters to form a regular polygon. What sort of polygon is it? e. Measure the

    asked on June 7, 2019
  53. math

    A Gauge pressure of 30 psig is equivalent to an absolute pressure of 15.3 psia 30 psia 44.7 psia 64.7 psia

    asked on December 13, 2017
  54. Physics

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 36.8 m/s. At the same time, it has a horizontal velocity of 52.6 m/s. At what speed does the vehicle move along its descent path? Answer in units of m/s. At

    asked on September 9, 2015
  55. physics

    A boy is sledding down a slope that is inclined at 30.0° with respect to the horizontal. A moderate wind is aiding the motion by providing a steady force of 108 N that is parallel to the motion of the sled. The combined mass of the boy and sled is 53.6

    asked on September 24, 2012
  56. Linear Algebra

    Let v1= (1,1,2,1) v2= (0,1,3,3) v3= (1,-1,-4,-5) v4= (1,0,-2,-4) a) Let U=span{v1,v2,v3,v4}. Find the dimension of U b) Is span {v1,v2,v3,v4}=R4? c) Find a basis for U Very Much Appreciated!!!

    asked on December 14, 2011
  57. math

    An electric motor that rated at 5 horse power can produce _____ in equivalent work. 0.007 watts 5 watts 17.05 watts 3730 watts

    asked on December 13, 2017
  58. chemistry

    The heat of combustion for 1 mole of carbon to carbon dioxide is -410 kJ. How many kJ of heat would be liberated from the complete combustion of 60.0 g of carbon?

    asked on November 26, 2017
  59. algebra 1

    The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at

    asked on May 19, 2016
  60. Chemstry

    Dry air is bubbled through 25 litres of water at a rate of 15 litres (STP)/min. The air leaving the liquid is saturated with water at 25 degrees celcius and 1.5 atm. How long it will take for all of the water to vaporize.

    asked on August 5, 2012
  61. algebra

    mario’s comic book colection, which was worth $1500 seven years ago, has been increasing in value by 12% per year since then. Which expression gives the current value of the collection?

    asked on April 10, 2019
  62. Math

    A scientist is trying to determine the identity of an element. It is highly reactive in water and forms an ionic bond with chlorine. It is also very shiny. The element is likely A. From Group 17 ********** B. From Group 1 C. From Group 15 D. A Noble Gas Is

    asked on March 9, 2018
  63. physics

    A skier travelling at 14 m s-1 reaches the foot of a steady upward 14° incline and glides 21 m along this slope before coming to rest. What was the average coefficient of friction?

    asked on September 29, 2012
  64. Chemistry

    Find the volume, in L, of 100g gas mixture containing 10.0 mol% hydrogen in nitrogen at 30.0C and 5.00 atm. Use the avg molecular wt. what is the molar concentration of hydrogen, in mol/L, in the gas mixture? what is the average mass denisity in g/L

    asked on July 26, 2012
  65. math

    Bernie has $16000 invested, part at 3% and the remainder at 5%. If the yearly interest on each investment is the same, how much interest does he receive each year?

    asked on April 17, 2017

    3)-A 9-kg block is held by a pulley system shown in fig. What force must the person exert in the following cases: a) to hold the block at rest. b) to lower it at 2m/s. c) to raise it with an acceleration of 0.5 m/s2? Ignore the mass of small pulley.

    asked on March 21, 2016
  67. Chemstry

    For the reaction A(g) + B(g) C(g) + D(g) the equilibrium constant K is defined as K = Y(sub y) * Y(sub D) / (Y (sub A) * Y(sub b)) where y is the molar fraction of the gas phase of a species At 620.00 K, the equilibrium constant is 1.100. Suppose the feed

    asked on July 11, 2012
  68. mathematics

    Two towns T and S are 300km apart, two buses A and B started from town T at the same time moving towards town S, Bus B traveling at speed 10km/h greater than bus A and reached S 1 1/4 hours earlier. Find the average speed of A? How far was Bus A from T

    asked on September 10, 2015
  69. English lit

    So, for my english class, I'll have to write a Short story ( Exposition Rising Action Climax Falling action Resolution ) I'd like the story to be around the theme of christmas or horror during x-mas. So I need you guys to help inventing a story with a

    asked on December 3, 2010
  70. Physics

    3)-A 9-kg block is held by a pulley system shown in fig. What force must the person exert in the following cases: a) to hold the block at rest. b) to lower it at 2m/s. c) to raise it with an acceleration of 0.5 m/s2? Ignore the mass of small pulley.

    asked on March 21, 2016
  71. Calculus

    Use the limit process to find the area of the region between the graph of the function and the x-axis over the indicated interval. Sketch the region. y=2x-x^(3), [1,3]

    asked on April 26, 2013
  72. Math

    a plane is flying at 32,460 feet to avoid some turbulence the plane ascends 1,645 feet A 13,326 B 13,642 C 18,489 D 20,463 E 30,815 F 34,105

    asked on October 3, 2019
  73. chem

    I2 + 5 Cl2 + 6 H2O 2 HIO3 + 10 HCl What is the reducing agent? In your answer give the element symbol and oxidation state.

    asked on January 15, 2013
  74. English

    Writing Skills: A Research Project, you are asked to compose an essay responding to ONE of the prompts offered. At its base, this is a personal essay, but you must incorporate research that will support your views and opinions. The core of this essay must

    asked on July 16, 2015
  75. Calculus

    On the moon, the acceleration due to gravity is -1.6 meters per second per second. A stone is dropped from a cliff on the moon and hits hits the surface of the moon 20 seconds later. How far did it fall? What was its velocity at impact?

    asked on April 26, 2013
  76. Chem-E / Chemistry

    Calculate the rate of heat required to bring 1.80mol/hr of HBr gas from 37.0 C to 434.0C at atmospheric pressure (Heat capacity of HBr is described by eq.) Cp (kJ/mol * C) = a + bT + cT^2 + dt^3 T is in C and HBr - a = 2.910x10^-2, b= -2.27x10^-7, c=

    asked on August 15, 2012
  77. Math

    Find all real number X Which satisfy the inequality 1/3(X+3)-1>1/5(X+6) Pls I need answer with solution step

    asked on March 29, 2018
  78. math

    about powers and roots

    asked on February 20, 2015
  79. Physics

    A 120kg fridge requires 610N to just move it across the floor, if the coefficient of kinetic friction is 0.2, determine the force required to continue pushing it s constant velocity.

    asked on April 16, 2017
  80. Chemistry

    Distillation Scale up: In an experiment 100 lb-mol of 47 lb-mol % ethanol, 53 lb mol % water sol'n is fed into distillation column and separated into two streams: 100lb-mol 0.470 lb-mol ethanol 0.530 lb-mol water goes to: steam 1: 17 lb-mol 0.890 lb-mol

    asked on July 7, 2012
  81. Physics HELP! QUICK!

    A banked circular highway curve is designed for traffic moving at 55 km/h. The radius of the curve is 220 m. Traffic is moving along the highway at 38 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow

    asked on December 22, 2010
  82. statistics

    A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to be pink and are known to have a polymeric

    asked on March 28, 2010
  83. Math

    an arch of a bridge is made by bending a steel beam into the shape of a semi circle, if the span (diameter) of the arch is 20m, use the value 3.14 for π to find the length of the steel beam to the nearest meter

    asked on June 14, 2018
  84. physics

    In the figure the man hanging upside down is holding a partner who weighs 535 N. Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 3.75 m/s, what force must the man apply to his partner in the straight-down

    asked on July 10, 2013
  85. math

    A stadium is divided into 8 sections. Each section has 72 rows and each row contains 25 seats. How many seats are in the stadium.

    asked on May 2, 2013
  86. Chemistry

    semibatch reaction: C6H6(l) +Cl2(g) ==> C6H5Cl(l) + HCl(g) C6H5(l) + Cl2(g) ==> C6H4Cl2(l) + HCl(g) C6H4Cl2(l) + Cl2(g) ==> C6H3Cl3(l) + HCl(g) \reactor contained 11.0 mole of benzene and a product mixture in which the amt of mono-chlorobenzene was 3x the

    asked on July 11, 2012
  87. Linear Algebra

    A test Question: Find the parametric equations of the line through the origin that is orthogonal to the plane 2x+4y-z=0

    asked on December 14, 2011
  88. sicence

    If you place a metal ring in a region in which a magnetic field is rapidly alternating, the ring may become hot your touch, why? be as specific as you can

    asked on May 2, 2010
  89. Math

    Solve x^2-6x+9 Using competing the square method

    asked on February 28, 2018
  90. Math

    Water is poured into cuboidal container at the rate of 80liter per min. If the volume of container is 144m^3,find the no. Of hours it takes to fill the reservior.

    asked on February 5, 2013
  91. physics

    Phy 124 – Chapter 22 Problems 1. Consider the following. A spot on a boat is 2.5 m above the water, and the light strikes the water at a point that is 8.0 m horizontally displaced from the spotlight. The depth of the water is 4.0 m. Determine the

    asked on March 22, 2012
  92. Math

    The length and width of a rectangle are (x+4) cm and x cm respectively. Write down expressions for: A. The perimeter of the rectangle B. The length of the side of a square with the same perimeter If the sum of the areas of the square and the rectangle is

    asked on October 23, 2011
  93. Social Studies

    Why is the First Amendment to the U.S. Constitution so important to us?

    asked on February 26, 2009
  94. MATH

    Solve the equation using completing the square method x^2-6x+9 Please I need your solutions

    asked on February 26, 2018


    asked on May 19, 2013
  96. linear math

    Let u=(2,0,k,-1) v=(-4,0,-3,2) and w= (0,1,0,0). Each answer must be justified(there is no answer where k=nothing) a) find all values of k, (if any) for which u is orthogonal to v b) Find all values of k (if any) for which the set {u,v,w} is linearly

    asked on November 20, 2011
  97. math

    In a test, the average was 74 points/100 points. After the test, three of students relocate. Then the average was 75 points/100. The circumstances of the students were 6:5:3. How many points did the three students have? I know the answere is 45, 75 and 90,

    asked on May 11, 2010
  98. Stonehenge

    What do people do at Stonehenge?

    asked on March 31, 2010
  99. Math

    Prove that cos2x=(1-tan^2x)/(1+tan^2x) I can't find any identities that can help me with this. I'm really confused

    asked on November 8, 2009
  100. engineering

    How do i work out the mass of a flywheel. I am given the density as 7800kg/m3, a 760mm diameter and a 180mm width. Please help

    asked on January 25, 2018


  1. 1
  2. 2