# Simon

Popular questions and responses by Simon
1. ## 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

2. ## history

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

3. ## 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

4. ## 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

5. ## PHYSICS HELP

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.

6. ## 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...

7. ## 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

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

9. ## 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

10. ## 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

11. ## 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

12. ## 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

13. ## 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

14. ## 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**

15. ## 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

16. ## 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]

17. ## 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!!!

18. ## MATh

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

19. ## 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

20. ## 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.

21. ## chemistry HWK MAKES NO SENSE

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

22. ## 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

23. ## Biology

Why (in detail please) in the carboxypeptidase mechanism, the weak bonds between an enzyme and a substrate will stretch the peptide bond of the substrate which lowers the bond energy? I just want to know why in detail this happens... Thank you.

24. ## 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

25. ## 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

26. ## 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

27. ## PHYSICSS HELP

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.

28. ## Math

Could someone explain the concept of "magic numbers" in reference to baseball as an indication of how close a team is to clinching the division title and how to calculate it?

29. ## 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?

30. ## 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.

31. ## 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

32. ## 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?

33. ## 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

34. ## 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

35. ## 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

36. ## government

what are the limitation to a citizens rights

37. ## Chemistry

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

38. ## history

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

39. ## MATH

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

40. ## 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

41. ## 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.

42. ## Math - Normal and Binomial Distribution

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

43. ## 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

44. ## 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?

45. ## chemistry

Elemental zinc will react with acid to evolve hydrogen gas. This is a redox reaction. Write a balanced molecular equation for the reaction of zinc and hydrochloric acid, showing the coefficents and the phases of all reactants and products. Below is an

46. ## 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

47. ## 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

48. ## 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

49. ## 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) =

50. ## Tourism

Two positive impact of summer Olympic on international tourism

51. ## Math

how does tan 110 equal tan290

52. ## Math

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

53. ## 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

54. ## 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

55. ## Musina high

Identify and explain five recommendation to address teenage pregnancy

56. ## Maths

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

57. ## 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

58. ## 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?

59. ## Home Economics

EXPLAIN THE IMPACT OF HOME ECONOMIC EDUCATION ON NATIONAL DEVELOPMENT

60. ## Excel

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

61. ## 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

62. ## 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

63. ## Math

When might it be more useful to use a graph rather than a function rule? A function rule rather than a graph?

64. ## 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

65. ## 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

66. ## Math

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

67. ## MATH - sequence & series

Evaluate. Un=(-1)^n n+1/2 Help pls

68. ## MATH

Evaluate Un=(-)^n n+1/2

69. ## MATH

Find the value of X if; Log base 10 7+ log base 10(3x+2)-log base 10(2x-1)=1

70. ## MATH

_DE MORGAN'S LAWS_ (a). (A n B)^c = A^c U B^c (b). (A U B)^c = A^c n B^c Please friends I need solutions to this set

71. ## 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

72. ## engineering

How do i work out the LINEAR ACCELERATION (and LINEAR VELOCITY) for a point on the circumference of the FLYWHEEL at its max ROTATIONAL VELOCITY

73. ## math

How do i work out the LINEAR ACCELERATION (and LINEAR VELOCITY) for a point on the circumference of the FLYWHEEL at its max ROTATIONAL VELOCITY.

74. ## math

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

75. ## 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

76. ## science

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

77. ## 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?

78. ## intermediate maths

James is six times as old as his granddaughter, Louise. In two years time he will only be five times as old as Louise. How old are James and Louise now?

79. ## physics

A car of mass m is going around a circular turn of radius R, which is banked at an angle Î² with respect to the ground. Assume there is friction between the wheels and the road. Let Î¼s be the coefficient of static friction and g the magnitude of the

80. ## Maths

Hey! I have this problem - i'm currently working on Quadratics at school, and i got homework. One of the questions is 18^2+2px+32. I have to find the Value of P, the answer i got is P>+-24. Can someone please confirm this is correct?

81. ## Maths

What is the next number in the series? 0 1 5 14 30 __

82. ## Maths

Amy and Ashley bike along the same trail. Amy bikes the entire trail at a speed of 20 mph and Ashley bikes it at a speed of 15 mph. Amy finishes biking the entire trail 8 minutes before Ashley. How many miles long is the bike trail?

83. ## 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

84. ## life orientation

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

85. ## science

How does graphite burn in air to give carbondioxide

86. ## 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

87. ## 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.

88. ## Algebra 1

A contestant on a quiz show gets 50 points for every correct answer and loses 100 points for each incorrect answer. After answering 24 questions, the contestant has 300 points. How many questions has the contestant answered correctly? Incorrectly? Use

89. ## physics

A student observes an airplane fly overhead with a constant velocity parallel to the x-axis at a height of 7.60 × 103 m. At time t = 0 the airplane is directly above the student, the vector P~ o = 7.60 × 103ˆj m describes the position on the airplane

90. ## 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

91. ## 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

92. ## language arts

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

93. ## Math

Hi I'm having a bit of trouble if anyone is able to help, thanks! Using the substitution u =1-2t^2, show that A = -1/4 ∫_1^(-7)▒e^u du

95. ## math

The dissipation of heat through a composite material of width w centimetres can be modelled by the function f(w) = 10/w - 0.77ln(w) – 3.2 You are required to find the width of material that will prevent any heat dissipation. - I understand f(w)= 0, but

96. ## Organic Chem Help

Can someone explain how crystallization works to produce a product that is purer than the input material. Thank you!

97. ## 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

98. ## Hypothesis Test

A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random

99. ## American history

The religion that is sometimes called Central America is actually apart of what continent.?