Popular questions and responses by Alfred
  1. English

    What is the difference in meaning between the following pairs of sentences? 1. I was a teacher. 2 I am a teacher

    asked on May 30, 2018
  2. maths

    The 4th term of an arithmetic progression AP is 37 and the 6th term is 12 more than the 4th term find. (i)the first term of AP. (ii) the seventh term of AP.

    asked on November 19, 2019
  3. math

    An oval track is made by erecting semi circles on each end of a 58 m by 116 m rectangle. Find the length of the track and the area enclosed by the track.

    asked on February 24, 2015
  4. algebra 2

    (x+1)^2-6=y Solve for x and y should be part of the final answer

    asked on May 26, 2020
  5. Physics

    A girl of 50 kg slides down a 8 m long slide into a pool. The upper end of the slide is 4.0 m above the water and the lower end of the slide is at the level of the water. Assume a coefficient of friction of 0.20, find: a) the potential energy of the girl

    asked on November 28, 2012
  6. Physics

    Does anyone have a giant list of WebAssign Physics1 work with the questions?

    asked on November 3, 2019
  7. Math

    Mark his a $10 bill inside his favorite book. He forgot the pages where he hid it. If the sum of pages where the bill is hidden is 177, on what pages will Mark find his money ?

    asked on February 26, 2019
  8. science

    An aeroplane flies horizontally at 80m/s in still air. If the aviator wishes to fly due south and the wind is blowing from the south-east at 30m/s, 1. what course must he steer. 2. how long will it take him to arrive at his destination 200km away.

    asked on November 3, 2018
  9. Math

    A jug can hold 3 times as much juice as a mug if the jug can hold 2 L of juice how much juice in liters can the mug hold

    asked on July 18, 2017
  10. math

    one-half a number minus 6 is 4. find the number

    asked on October 17, 2016
  11. Algebra

    Identical squares are cut off from each corner of a rectangular piece of cardboard measuring 7cm by 12cm. The sides are then folded up to make a box with an open top. If the volume of the box is 33cm^3, what is the largest possible length of each side of

    asked on August 23, 2016
  12. Math


    asked on July 17, 2016
  13. geometry

    penelope said that the side lengths of 4,12, and 8 could form a triangle because 4+8=12. is she correct

    asked on May 23, 2016
  14. math

    find the volume in cubic centimeters of the rectangular prism if the lenght is 2 1/2 cm and the width is 3 cm

    asked on February 4, 2016
  15. chemistry

    A 250.0mL sample of 0.0012M Pb(No3)2 (aq) is mixed with 150.0mL of 0.0640M Na (aq) should precipitation of PbI2 (s) ,Ksp=7.1¡Á10^-9, occur?

    asked on December 28, 2015
  16. math

    10. A military jet flies horizontally with a velocity of 450 m/s and 20,000 m above the ground. When the jet is straight above an artillery gun a shell is fired. Assuming the shell hits the jet. a. Calculate the horizontal component of the initial velocity

    asked on September 20, 2015
  17. science

    how many liters of water do u need to mix with a 250 grams of steric acid

    asked on July 4, 2015
  18. Economic

    What are welfare payments or consumer subsidies?

    asked on May 29, 2015
  19. Honors Algebra II

    I've been stuck on a problem with my homework for a couple of minutes now. We are doing Systems of Two Equations, using the substitution method. The problem is: 4y-6x+20=0 3=(18/5)x+(21/10)y

    asked on August 27, 2014
  20. Compensation and Benefits

    Compare and contrast the following methods of job evaluation, and include examples that are not the same as in the textbook to demonstrate understanding: Lott, Benge, and Multiple Regression. Identify the key differences.

    asked on March 5, 2013
  21. Physics

    A golfer drives a golf ball with a velocity of 100 ft/sec and an angle of 45 degrees. A. find the time of travel for the ball. B. Find the balls range. C. Find the maximum height of the ball

    asked on November 5, 2012
  22. college algebra (math 90)

    How do i graph this hyperbola? X^2+6x-3y^2=0

    asked on December 5, 2011
  23. Thermodynamics (Chemistry)

    Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?

    asked on August 8, 2011
  24. Physical chemistry


    asked on August 8, 2011
  25. Physical Chemistry

    1.6 mol of Neon gas are heated from 20.0 °C to 85.2 °C at a constant pressure of 1 atm. Calculate the work done. (R = 0.082057 L.atm/ K. mol)

    asked on August 8, 2011
  26. pre-algebra

    find the volume of a pyramid 9in.by9in. by3in.round to the nearest tenth

    asked on March 6, 2011
  27. Physics

    A fountain has a cylinder with holes placed on the side at heights of 1 m and 2 m. The water level is the cylinder is kept at a height of 3 m by an input type. The water emerges from the holes and strikes the fountain pool at some distance x. a. What

    asked on February 6, 2011
  28. pre-algebra


    asked on October 25, 2010
  29. Algebra

    Process of eliminiation method ? Is there a solution, infinity or no solution. I don't get it. Can anyone help me? 3r - 5s = -27 5r + 3s = 23

    asked on May 26, 2010
  30. Physics

    1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as

    asked on August 31, 2009
  31. Physics

    (a) Identify the significance of scientists James Clerk in hertz’s research. (b) Explain the physics of why hertz was able to detect sparkling in small detector coil when the detector was located in the position shown on the diagram above. (c) Describe

    asked on August 31, 2009
  32. Physics

    Explain how a galvanometer functions, using electromagnetic principles.

    asked on August 31, 2009
  33. Physics

    A dc electric motor found in the lab was being examined by a student. It was connected to a power supply and it was not attached to any load. (a) The student stated, ‘when the motor is switched on, the electrical energy input should cause the motor to

    asked on August 31, 2009
  34. Physics

    A very important experiment was carried out at the end of the 1800’s involving testing for the speed of the earth through the ether. (a) State the name of this experiment (b) Describe why the light beams are perpendicular to each other at one stage of

    asked on August 31, 2009
  35. Physics

    A student spins a 1.2kg rock around above her head horizontally in an experiment which aims to model how satellites orbit the earth. The student counts 3 orbits per second when the string produces an orbit radius of 35cm. (a) Calculate the centripetal

    asked on August 31, 2009
  36. Physics

    (A) Identify how the gravitational potential energy changes as a shuttle takes off from the launch pad. (b) Explain the consequences to the space craft and its occupants if the shuttle is undergoing re-entry, and the angle of re-entry is significantly

    asked on August 31, 2009
  37. math

    a baseball team a series of five games to play, with one game each day from monday through friday. If it rains on the day of a scheduled game, the game is cancelled. There is a 20 percent probability of rain each day. how likely is it that the team will

    asked on June 3, 2007
  1. physics

    from energy= 1/2mv^2. =1/2×0.5×3^2 =2.25 but work done=force applied then force=2.25 recall f=ma =0.5×10 5N so. coefficient=kinetic frictions limiting friction 2.25÷5=0.45 coefficient of kinetic friction =0.45

    posted on November 9, 2019
  2. english

    Write a letter to uncle requesting him to pay up your school fees

    posted on June 27, 2019
  3. Civics

    I'm doing a research on human rights violation

    posted on April 16, 2019
  4. science


    posted on September 21, 2017
  5. Physics

    inverse sin--> = Sin^-1(1.46-1.48)= 80.57 deg 90-80.57 = The Max_ang = 9.43 deg

    posted on March 15, 2017
  6. Physics

    t= √ 2y/g = √2(10m)/9.8m/s^2 = √2(10)/9.8 = 3.19 s d= 3.19s(100) = 319.4 = 319m

    posted on January 15, 2017
  7. calculus

    The height of the the container/vessel is 4 cm so we use this to formulate the radius as h/4 in that specific time. V=1/3 pi (h/4)^2 (h) V=1/3 ((pi)(h^2))/16 (h) V=(pi h^3)/48 dv/dt= pi/48 ((3)(4)^2(2cm/sec)) dv/dt= pi/48 (96) dv/dt= (96 pi)/48 dv/dt= 2 pi

    posted on October 18, 2016
  8. math10

    Let 23=x 408=y N= final answer then âˆš(23+âˆš408) - âˆš(23-âˆš408) becomes âˆš(x+âˆšy) - âˆš(x-âˆšy) Equating it to N âˆš(x+âˆšy) - âˆš(x-âˆšy)=N Solving this, N²= 2x-2âˆš(x²-y) Subsituting x=23 and y=408

    posted on October 2, 2016
  9. Trigonometry


    posted on July 13, 2016
  10. Science


    posted on April 11, 2016
  11. physics


    posted on December 3, 2015
  12. Physics


    posted on February 6, 2014
  13. Physical Chemistry

    so the formula is W = nR∆T Thank you for the answer above:)

    posted on August 8, 2011
  14. science-biome

    plants and animals

    posted on October 10, 2010
  15. Algebra


    posted on May 3, 2010
  16. math


    posted on August 31, 2009
  17. Chemistry

    Does the density of air change when it is heated in a closed container?

    posted on May 26, 2009