# joseph

Popular questions and responses by joseph
1. ## Mathematics

Perfume is sold in two different sizes of bottle The 80ml bottle is priced at £55 The 50ml bottle is usually priced at £45, but is on special offer If you buy one 50ml bottle of perfume, you get a second for half price By calculating the price per ml

2. ## science

NH2-, NH3, and NH4+ have H-N-H bond angles of 105, 107 and 109. Explain this variation in bond angles.

3. ## Geometry

Please help me!!! 1. Read the following paragraph from "From Behind the Veil." When she reached her room Siham could barely stop herself from laughing out loud. She picked up her veil and danced with glee, then stopped in the middle of the room and began

4. ## Physics

A man using a 70 kg garden roller on a level surface exerts a force 20 kgf at 45 degrees to the ground . Find the vertical force of the roller on the ground if he ; a) pulls the roller. b) pushes the roller.

5. ## Chemistry

The vapor pressure of liquid bromine at room temp is 168 torr. If the bromine is introduced drop by drop into a closed system containing air at 775 torr, what would the total pressure (in torr) be when no more bromine vaporized and a few drops of liquid

6. ## Math (Combinatorics)

In how many ways can I place 5 different beads on a bracelet if flipping or rotating the bracelet does not change the order of the beads?

7. ## Mathematics

Given that, the coefficient of x^4 is 3840 in the binomial expansion of (1+qx)^6. Find: i. The value of q. ii show that the of sum of kx^3 and px^4 is 5120.

8. ## math

The length of a rectangle is 5cm longer than the its breadth. Find the length and breadth if the perimeter is 26 cm

9. ## chemistry

An optically active compound A, C6H10O2, when dissolved in NaOH solution, consumed one equivalent of base. On acidification, compound A was slowly regenerated. Treatment of A with LiAlH4 in ether followed by protonolysis gave an optically inactive compound

10. ## pre-al

If you roll a standard number cube 42 times, how many times do you expect the cube to show a six or an eight?

11. ## physics

A child pedals a tricycle, giving the driving wheel an angular speed of 0.373 rev/s. If the radius of the wheel is 0.260 , what is the child's linear speed?

12. ## physics

a stainless steel orthodontic wire is applied to a tooth.the wire has an upstretched length of 3.1cm and a radius of 0.11mm.if the wire is stretched 0.10mm,find the magnitude and direction of the force on the tooth.disregard the width of the tooth assume

13. ## Science

Concentrated phosphoric acid is 90% by mass and the remaining mass is water.The molarity of phosphoric acid in 90% is 12.2M at rtp. a)What is the density of the solution at rtp ? b)What volume (in mL)of this solution is needed to make a 1.00L solution of a

14. ## Chem.

Benzene has a heat of vaporization of 30.72 kj/mol and a normal boiling point of 80.1 degrees celcius. At what temperature does Benzene boil when the external pressure is 440 torr? Since...I didn't get the right answer. I'll just show my work and see if

15. ## math

a girl walks 800 m on a bearing of 129 degrees.calculate how far east and south she is from her starting point.

16. ## Algebra

Write an equation for a function that has a graph with the given characteristics. The shape of y=^3 squareroot x is shifted 7.3 units to the left. This graph is then vertically stretched by a factor of 9. ​Finally, the graph is reflected across the

17. ## Physics

A bullet of mass 50g is fired with a velocity of (500,0)m/s in to a sack of sand of mass 20kg which is swinging from rope. At the moment the bullet hits, the sack has a velocity of (0,3)m/s. Workout the velocity of bullet and sack just after the bullet

18. ## Math

Which equation represents a line that is parallel to the line whose equation is 3x - 2y = 7 A) Y= -3/2x + 5 B)Y= -2/3x + 4 C)Y= 3/2x - 5 D)Y= 2/3x - 4 I chose c

19. ## Physics

A toy rocket has a mass 0f 350g at launch. The force it produces is 15N and it is fired at an angle of 65° to the horizontal. What is the initial acceleration of rocket as a vector?

20. ## Physics

The constant resistance of a resistor is 30 ohms, independent of the temperature. The resistor is made up of an aluminium resistor with resistance R1 at 0°C in series with a carbon resistor with resistance R2 at 0°C. Evaluate R1 and R2, temperature

21. ## math

what number gives the same result when multiplied by 6 as it does when 6 is added to it?

22. ## science

Which statement is not true of simple machines? A.They can change the amount of work done on an object. B.They can change the distance over which you apply a force. C.They can change the direction in which you apply a force. D.They can change the amount of

24. ## science

NH2-,NH3, and NH4+ have H-N-H bond angles of 105, 107, and 109. Explain this variation in bond angles

25. ## math

the volume of a rectangular prism is 2,058 cm3. The length of the prism is three times the width. The height is 14 centimeters. Find the other dimensions

26. ## Chemistry

How many resonance structures do these following acids have? H2CO3-carbonic acid H3PO4-phosphoric acid H2SO4-sulfuric acid HNO3-nitric acid CH3COOH- acetic acid CH2ClCOOH- chloroacetic acid CHCl2COOH- dichloroacetic acid CCl3COOH- trichloroacetic acid

27. ## math

James has to choose his options in his final year at school. He must choose one subject from each of five different option groups. In the first group, there are six subjects to choose from. In the second group, there are four subjects to choose from. In

28. ## Physics

An object 20cm high is placed 40cm from a lens of focal length 24cm. Calculate: a) The power of the Lens? b) The distance from the lens to the position of the image?

29. ## Inorganic Chemistry

Which of the following species contain a C4 axis and a σh plane? Choose all that apply. [ICl4]- SiCl4 XeF4 GeH4 [PO4]3

30. ## physics

A 5.0 kg block of some unknown material is suspended from a spring scale and submerged in water.? The spring scale reads 39.3 N. What is the specific gravity of the block? I get 5051.5 kg/m^3 but its incorrect.

31. ## Physics

2 forces acting at a point make angles of 25 and 65 degrees respectively with their resultant which has a magnitude of 150 N .Find the magnitude of the two components.

32. ## Science

which of the following are predicted by the molecular orbital model to be stable diatomic species N22-, O22-, F22-

33. ## physics

A uniform horizontal bar of length L = 5 m and weight 243 N is pinned to a vertical wall and supported by a thin wire that makes an angle of theta = 39o with the horizontal. A mass M, with a weight of 300 N, can be moved anywhere along the bar. The wire

34. ## english/poem

I am suppose to do a funny sonnet poem that has 10 syllables per line and 14 lines .Can you check my syllable or any mistakes. Oh homework! Oh homework! How I hate you! You smell, you stink, and you I don’t admire I want to tell you “go on” “git”

35. ## Math

An equalateral triangle has the length of it's sides given as (y+3)cm, (2y-x)cm and (4x +3)cm.Find (a) the value of x and y (b)perimeter of the triangle (c) altitude of the triangle to the nearest whole number

36. ## chemistry

The first-order reaction, SO2Cl2 ¨ SO2 + Cl2, has a rate constant equal to 2.20 ~ 10-5 s-1 at 593 K. What percentage of the initial amount of SO2Cl2 will remain after 6.00 hours?

37. ## Math

An arithmetic progression has 11 as its first term and fourth term is 32.find the sum of the first nine terms.

38. ## social studies

The secularism of the Renaissance was a shift from what feature of medieval life?

39. ## physics

the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0¡ãc. at what temperature will the length of the rules become equal

40. ## Computers

What is one important feature of an AUP? A. a list of all available courses B. a clear outline of the consequences of violating the policy C. a permissive approach to internet usage D. a calendar for the academic year

41. ## ENGLISH

Select the complete subordinate clause (including all modifiers). I honestly did not know that you felt so strongly about the subject. A.I honestly b.I honestly did not know c.did not know that you d.that you felt e.that you felt so strongly f.that you

42. ## GEOMETRY

ANGLES X AND Y ARE SUPPLEMENTARY ,AND THE MEASURE OF ANGLES X IS 24 DEGREES GREATER THAN THE MEASURE OF ANGLE Y. FIND THE ANGLE MEASURES.

43. ## Physics

Yo-Yo man releases a yo-yo from rest and allows it to drop, as he keeps the top end of the string stationary. The mass of the yo-yo is 0.056 kg, its moment of inertia is 2.9 X 10^-5 kg X m^2 and the radius r of the axle the string wraps around is 0.0064 m.

44. ## algebra

ax/b + cx/d =e solve for variable x

45. ## chem

The normal melting point of copper is 1357 K and heat of fusion of Cu is 13.05 KJ. How much heat, in kilojoules, is evolved when a 3.70 kg sample of of molten Cu freezes?

46. ## reding

milkweed jerry spinelli what do you think the black horse on the merry-go-round might have symbolized?

47. ## Algebra 1

A 10 meter rope is cut into two pieces so that one piece is equal to 5 meters longer than 4 times the shorter piece find the lengths to both sides

48. ## math

a ship drops its anchor into the water and creates a circular ripple. the radius of this ripple increases at a rate of 50m/s a) find an equation for the circle 10 seconds after the anchor is dropped i got x^2+y^2=500? is that correct

49. ## Math

A transversal intersects two lines. Which conditions would always make the two lines parallel? A) Vertical Angles are Congruent B) Alternate interior angles are congruent C) Corresponding angles are supplementary D) Same-side interior angles are

50. ## Functions

Milk is leaking from a carton at a rate of 3mL/min. There is 1.2 L of milk in the carton at 11:00 a.m. How much will be left in the carton at 1:00 p.m.? f(x)=1200-3x

51. ## language

Barbra Jordan believes that we must put our faith in children because?

52. ## Math

Five years ago, a father was 3 times as old as his son. Now, their combined ages amount to 110 years. Thus, the present age of the father is?

53. ## Mathematics

A rectangle has been divided into two strips, A and B. The strips have the same width. 2/5 of strip A is shaded. 5/8 of strip B is shaded. The length of the rectangle is 40cm. What fraction of the rectangle is not shaded? Thank you. Joseph.

54. ## Physics

A 15 ft plank of mass 50 kg is laid across two ladders. The ladders are 5 ft apart, and the plank is laid such that 5 ft of it hang off at each end. You have a mass of 90 kg. (a) How far out past the ladder can you walk before it gets dangerous? I tried

55. ## chemistry

How much heat (in cal) is necessary to heat 27.0 mL of octane (s= 0.526 cal/g ®C ; d = o.703 g/mL ) from 50.6 ®C to 67.2 ®C? I understand the Delta T is = 16.6®C But I don’t know what d stands for (density) or how to apply to the formula.

56. ## Physics

A toy train is moving on a track from right to left. You are told that work is the dot product of force and displacement. In what direction would you apply a force so that you do the most negative work on the train? a)You would apply a force that is in the

57. ## math

convert 101101two to a number in base ten.

58. ## physics

A reciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder. Consider a reciprocating compressor running at 150 rpm. During a compression stroke, 1.30 mol of air is compressed. The

59. ## Statistics

A student studies for a statistics exam where all questions are true or false. A reputable source indicates that with studying the student has a 90% chance of answering each question correctly. There are only three questions on the test. What is the

starting with an initial speed of 5.00 m/s at a height of 0.265 m, a 1.75 kg ball swings downward and strikes a 4.45 kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.75 kg

61. ## History

What was Joseph Stalin's full name?

62. ## Algebra

I need help with this question: x^2-20x+24

63. ## English

In a compare and contrast essay, which of the following transitions would show a comparison of ideas

64. ## physics

the efficiency of a machine is 80% determine the work done by a person using this machine to raise a load of 200kg through a vertical distance of 3.0m {take g=10m/s}

65. ## Physics

A spring 20cm long is stretched to 25cm by a load 5N. What will be it's length when stretched by 100N assuming that the elastic limit is not reached?

66. ## math

John who is 15 years old, is 3 years older than his younger brother Paul. If James their brother is 21years old. What is the average of the three brothers

67. ## Chemistry

The initial concentration of NH3 in the zero order reaction NH3→3H2+N2 is 0.0312 M. After 30.0 seconds, the concentration of NH3 is 0.0302 M. What is the rate constant k for the reaction?

68. ## Physics

A progressive wave equation is given by y=a sin (200(pie)t -(pie)x/17) Find; 1) The wavelength 2) Velocity 3) Frequency 4) Period

69. ## physics

A golfer hits a ball from the origin with an initial speed of 30.0 m/s at an angle of 50 degrees above the horizontal. The ball lands on a green that is 5.00 m above the level where the ball was struck. (a) How long was the ball in the air? (b) How far has

70. ## math

the 5 term of a gp is 4375 and the 2 term is 35 find (a)the 3 (b)the 6 (c)the sum of the first five terms

71. ## Chemistry

At 25oC, the equilibrium pressure of ammonia vapour above a 0.500 M aqueous ammonia solution is 0.84 kPa. Calculate the Henry's law constant for ammonia in M/bar. Do not include units. Include 4 significant figures.

72. ## math

if 1/2,1/x,1/3 are successive terms of an arithmetic progression. Show that 2-x /x-3 = 2/3.

73. ## physics

a motorbike weighs 400kg accelerates uniformly at 1.5m/s2 from rest to 22m/s. then the brakes are applied and it stops 2.5s later. (a)Sketch a graph showing the motion history (b)From the sketch,determine the total distance traveled (c)Determine the

74. ## physics

The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?

75. ## Math

Use a tree diagram or systematic list to determine the number of ways a nickel, a dime, and a quarter can be flipped to get exactly one tail.

76. ## Math

A class of 23 students was using square tiles to build rectangular shapes. Each student had more than 1 tile and each had a different number of tiles. Each student was able to build only one shape of rectangle. All tiles had to be used to build a rectangle

77. ## math

find the hidden question. single load cost \$2 and double load cost \$4

78. ## chemistry (moles)

2.5g of a mixture of anhydrous BaOH and BaCl2 was dissolved in distilled water and made up to 250cm3. 20cm3 of this solution required 19cm3 of 0.1moldm3 of dilute nitric acid for complete reaction. Calculate the percentage by mass of BaCl2 present in the

79. ## Math

Exponetial Functions In the following exponential relations, solve for x using logarithms. Round your answers to 4 decimal places. a) 5^3x=65 b) 2^2x+3=80

80. ## Math

If the temperature was -10F and dropped by 16F what would the temperature be?

81. ## Physics

At the start of a road trip, the pressure of the air in a car tyre is 276kPa and the temperature is 12.0 degrees celsius. After driving for some time the pressure in the tyre is now 303kPa. Assuming that the volume of the air inside the tire remains

82. ## Math

If a car decreased by 10 percent and is now worth \$14,000. What was the original price of the car

83. ## Physics

A projectile of mass 0.413 kg is shot from a cannon, at height 6.8 m, with an initial velocity vi having a horizontal component of 7.5m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ground a

84. ## chemistry

Distinguish clearly between ▲G for a reaction and ▲S of the same reaction. Which of the two is used to predict whether a reaction is spontaneous? why? (4 marks)

85. ## math

Juanita wants to give bags of stickers to her friends. she wants to give the same number of stickers to each friend. she's not sure if she needs 4 bags or 6 bags of stickers. How many stickers could she buy so there are no stickers left over.

86. ## organic chemistry

Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.32 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with D2O

87. ## mathematic

a bag contains 3rdmarbles, 2white and 3green a boy takes at one marble at random. what is the prob that it is either red or white?

88. ## Trig

A 24-foot ladder is placed against a building. The building is perpendicular to the level ground so that the base of the ladder is 11 feet away from the base of the building. How far up the building, in feet, does the ladder reach? Round to nearest

89. ## Math

Which relation is NOT a function? Y=0 X=2 Y=2x Y=x+2

90. ## Pre-Calculus

Write an algebraic expression in x for sec(arcsin(x/sqrt(x^(2) +4)))

91. ## social studies

Which iroquois nations lived the farthest from new york city?

92. ## Physics

A car is traveling at 24.4 m/s. If the driver has a reaction time of 1 second, what will be his stopping distance if his car slows down at 8 m/s2?

93. ## math

Trent earned \$28,500 last year. He paid \$8,265 for rent. What percent of his earnings did Trent pay for rent

94. ## science

A 10.0 kg cart and a 15 kg cart are locked together with a compressed spring between them. They are then released so that the spring pushes the two carts apart. The 15 kg cart is moving at 3.0 m/s afterward. How fast is the 10.0 kg cart moving?

95. ## math

jewelry marked 14 karat gold is 14/24 pure gold. what is the percent

96. ## chemistry

What volume of oxygen at s.t.p is required for the complete combustion of methane according to the following equation. CH4 2O2= CO2 2H2O

97. ## english

Write S if the sentence is simple .Write C if the sentence compound. 1) Paul plays on the basketball team and works part time at the grocery store. Compound 2)He is an assistant manager in the deli.Simple 3) The store manager hired him as a bagger,but Paul

98. ## Math 117

Use rational exponent to write 4 cube root x multiply by 6 cube root 6x as a single radical expresion.

99. ## Calculus

Find the point on the line 2x+7y-6=0 which is closest to the point (-5,5.