priya

Most popular questions and responses by priya
1. math

two buses start from the same bus stand at 8am . one travels at 40km/h and the other at 50km/h . the second bus reaches the next stop at 10am. how much later will the first bus arrive?

Determine the value of k for which the function f(x)= 4x^2- 3x+2kx+1 has two zeros. check these values in the original equation? i cant figure out the answer to it. It says in the book that it is k 3.5,but i don't know how they got it.

3. Chemistry

If in the given reaction, 3I 2 + OH- ---> IO3 - + 5I- 2 moles of iodine are taken, then the ratio of iodate and iodide ions formed in the alkaline medium is

4. Maths

There are 50 students in a class of which 40 are boys and the rest are girls the average weight of the class is 44kg and the averageweight of the girls us 40kg. find the average wieght of the boys

5. Physics

A uniform rod is 4m long and weighs 10 kg.if it is supported on a knife edge at one metre from the end what weight placed at that end keeps the rod horizontal?

6. PHYSICS

An automobile battery has an emf of 12.6 V and an internal resistance of 0.0500 . The headlights together present equivalent resistance 5.60 (assumed constant). (a) What is the potential difference across the headlight bulbs when they are the only load on

7. MATH

In Triangle ABC, medians BE and CD are produced respectively to points X and Y such that CD=DX and BE=EY as shown in the figure. Show that the points X, A and Y are collinear. Also show that A is the mid point of XY

8. math

The HCF of two number is 145 and their LCM is 2175. If one number is 725, find the other number.

9. science

The work done by 500 calories of heat in isothermal expansion of ideal gas is?

Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree. There are tw answer 104°( I got this one but there is also 256° I don't have anyidea for this one please explain to me I appreciate your time

11. Shegal

Three identical metal spheres are hung from a ceiling on rigid non-conducting rods. Sphere 1, sphere 2, and sphere 3 have charges 75 µC, −44 µC, and 50 µC, respectively. Each sphere is separated by 0.15 m. What is the net electric force on the middle

12. Chemistry

Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 13.2 mL of a 3.00 M solution of hydrochloric acid and collect all of the hydrogen in a balloon at 25oC and 1.00

13. Chemistry

Copper (I) chloride, CuCL, has Ksp = 1.9 x 10^ -7.calculate the molar solubility of CuCL in A)pure water, B)0.0200M HCl solution C) 0.200M HCl solution, and d) 0.150M CaCl2 solution. I used the ice table and for a) i got 0.000435 M sort of lost for the

14. Math 11

A roller coaster has a track that drops at an angle of depression of 25 degrees from a height of 14.9 m. When it reaches the ground in travels horizontally for 8 m. It then rises at an angle of elevation of 47 degrees to a height of 26.8 m A) What is the

15. Physics

A projectile is launched with an initial speed of 80.0m/s at an angle of 40 degrees above the horizontal. The projectile lands on a hillside 3.80s later. Neglect air friction. What is the projectile's velocity at the highest point of its trajectory? What

16. orgenic chemistry

which starting material is the limiting reagent in this procedure? which reagent is used in excess?How great is the molar excess(how many times greater)?

17. finance

You want to accumulate \$1,000,000 in retirement funds by your 65th birthday. Today is your 30th birthday, and you plan on making annual investments into a mutual fund that you project will earn a 10% annual rate of return. Your first deposit will take

A quadratic function is defined by f(x)= 3x^2+4x-2. A linear function is defined by g(x)= mx-5. what values(s) of the slope of the line would make it a tangent to the parabola

19. chemistry

Calculate the standard cell potential for the glavanic cell in which the follwoing reactino occurs: 2I^-(aq) + Br2(l) ---> I2(s) + 2Br^-(aq)

20. 12th

an electron above the earth is balanced by the gravitational force and the electric field of the earth. find the electric field of the earth.

A quadratic function is defined by f(x)= 3x^2+4x-2. A linear function is defined by g(x)= mx-5. what values(s) of the slope of the line would make it a tangent to the parabola.

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

23. Chemistry 11

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems

24. Math 11

An airplane is flying 100 km north and 185 km west of an airport. it is flying at a height of 7 km. A) what is the straight-line distace to the airport? B) what is the angle of elevation of the airplane, from the point of view of the airport?

25. geography

How are natural resources distributed throughout the world? (a) Most natural resources are found in developed nations. (b) Most natural resources lie beneath the ocean floor. (c) Natural resources are distributed evenly among all nations. (d) Natural

26. slps

the class mark of the observation are 17, 21, 25, 29, 33,37,41,45.find the class intervals

27. physics

A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (A) (b) Find the energy delivered to the motor by

28. social studies

8. Four major vegetation regions common to both the United States and Canada are (A)tundra, rain forest, ice cap, and desert scrub. (B)forest, desert scrub, savanna, and continental. (C)tundra, forest, grassland, and highlands. (D)ice cap, grassland,

29. chemistry

one method for favoring the formation of an ester is to add excess acetic acid. sugest another method,involving the right-hand side of the equation,that will favor the formation of the ester.

30. Bio 11

1 example for each A) Tentacled Mollusk B) 2-shelled Mollusk C) 1-shelled Mollusk D)Clever and smart Mollusk E) Pearl producing Mollusk F) Devoted mother Mollusk G) Land Mollusk H) Dangerous Mollusk I) Sneaky Mollusk J) Herbivore Mollusk K) 38-90!!

31. physics

The quantity of charge q (in coulombs) that has passed through a surface of area 2.08 cm2 varies with time according to the equation q = 4t3 + 5t + 6, where t is in seconds. (a) What is the instantaneous current through the surface at t = 1.08 s? (b) What

32. physics

You are a pilot on an aircraft carrier. You must fly to another aircraft carrier, now 1450 km at 45 degree of your position, moving at 56 km/hr due east. The wind is blowing from the south at 72 km/hr. Calculate the heading and airspeed needed to reach the

33. Physics

The vector sum of two vectors of magnitude 10 units and 15 units can never be A) 28 units B) 22 units C) 18 units D) 8 units

34. chemistry

one method for favoring the formation of an ester is to add excess acetic acid. sugest another method,involving the right-hand side of the equation,that will favor the formation of the ester.

35. Math 11

Chung-ho is standing on the top of a building that is 135 m talk. The angle of depression to the top of the building next door is 71 degrees. The angle of depression to the basebof the building is 77 degrees. The building are 31 m apart. How talk is the

36. chemistry

Calculate the heat of formationof benzene if the heat of combustion of benzene is 3260 kj/mol, given the following enthalpies of formation of the product. enthalpies of formation for O2= 0k (element) enthalpies of formation CO2 = -394kj/mol enthalpies of

37. Math

Supplier on-time delivery performance is critical to enabling the buyer’s organization to meet its customer service commitments. Therefore, monitoring supplier delivery times is critical. Based on a great deal of historical data, a manufacturer of

38. biology

name the gas transporting protein molecule present in the blood ? why this molecule is employed to transport oxygen but not carbondioxide.

39. physics

a wheel starts from rest on application of torque which gives it an angular acceleration @=2t^2-t^2 for first two seconds after which @= 0 then find angular velocity of wheel after 4 seconds.

40. science

Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius

41. physics

A large, flat, horizontal sheet of charge has a charge per unit area of 2.05 µC/m2. Find the electric field just above the middle of the sheet. kN/C

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

43. maths

if a hollow sphere of internal and external diameter 4cm melted 8cm respectively melted into a cone of base diameter 8cm . find the height of cone

If the given point is on the terminal arm of an angle A in stadard position. 0 degrees more than or equal too A and less than or equal too 180 degree, find sin A and cos A: a) (6,8) b) (-5,12) Can you tell me how you get it because I do not understand it

45. social studies

Which of the following statements is NOT true in regard to Brazil's interior plateau? (A) It experiences periods of drought. (B) Its soil is often devastated by heavy rains that cannot penetrate the dry, hard ground. (C) Poverty is prevalent in this

46. Math11

bernhardt and julia are observing an eagals nest in a tree. Julia is 75 m from the tree, and sees it an angle of elevation of 42 degrees. A) How high up the tree is the nest? B) bernhardt is standing 30 m behind Julia. At what angle of elevation does he

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

48. math

The difference between the simple interest and compound interest on a certain sum for 2 years at the rate of 5% per annum is rupees 205.find the sum.

49. Chemistry 2

If a gaseous sample contains 74% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)?

50. physics

The electric field everywhere on the surface of a thin, spherical shell of radius 0.710 m is measured to be 860 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? nC (b) What can you conclude

51. English

Please check my work: Proofread the passage looking for grammar, puntuation, and spelling errors. Most students do not like english class. They think think its a waste of there time and energy. An't nobody likes to right papers and take tests anyway? Me

52. geography

3. the soil of much of the steppe region of northern eurasia is ... A. very fertile and productive B. lacking in minerals and unproductive C. too cold to produce much food. D. heavily fertiled with chemicals to make it marginally productive.

53. trig

If sin theta = x and -pi/2 is less than or equal to theta less than or equal to pi/2, find sin 2theta and cos 2theta in terms of x. Is it alright if I recommend you to my classmates tommorow? YOu seem to know more than my professor!

54. science

Two charges placed at a distance r apart exert force F on each other at what distance will these charges experience same force in medium of dielectric constant K.

55. bio

How is the oxygen production in 30 seconds related to the rate of the reaction?

56. maths

2 equal cords AB and CD intersect at E.prove that arc AD=arcCB

57. physics

The charge per unit length on a long, straight filament is -87.0 µC/m. (a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive

summary of discovering tut the saga continues

59. MATHS

A TRAIN B SPEEDING WITH 120KMPH CROSSES ANOTHER TRAIN C, RUNNING IN THE SAME DIRECTION IN 2 MINUTES. IF THE LENGTH OF THE TRAIN B AND C BE 100M AND 200M RESPECTIVELY. WHAT IS THE SPEED OF THE TRAIN C

60. physics

On a 120km track,a train travels the first 30km at a uniform speed of 30km/hr.how fast must the train travel the next 90km so as to average 60km/hr for the entire trip?

61. orgenic chemistry

why is the reaction mixture(isopentyl acid, glacial acetic acid,concentrated ssulfuric acid) extracted with sodium bicarbonate?give an equation and explain its relevance

62. orgenic chemistry

why is the reaction mixture(isopentyl acid, glacial acetic acid,concentrated ssulfuric acid) extracted with sodium bicarbonate?give an equation and explain its relevance

63. soild mechanics

Under what axial tensile load, the diameter of a steel bar will be reduced from 8 cm to 7.995 cm? Take E as t/cm2 and Poisson’s ratio as 0.3

64. Math

5 sin theta +12 cos theta = 13. Prove 5 cos theta - 12 sin theta =0.

65. physics

a car is moving at speed of 50km/hr ,can be stopped by brake at least at 6 m.If the same car is moving at speed of 100 km/hr ,what is the minimum stopping distance?

66. maths

two straight poles length 80m, 50 m vertically with a distance 40m. a rope is connected their tops. find the length of the rope?

67. Math 11

A triangular pyramid has faces that are all equalatetal triangles. Each side length is 16 cm. What is the surface area of the pyramid?

68. chemistry

for the chemical reaction A+B= C+D, the following experimental data were taken to determine the ratelaw equation at 300K. determine the rate law for the chemical reaction. fromthe experiment data i found out the exponetial value... but 300k part confuses

simplify √(x^5y^8) the answer is x^5/2y^4 does it matter if 5/2 is replaced with 2.5? x^2.5y^4 its the same thing right?

70. Math

cone is inscribed in the sphere of radius R. Find the cone with maximum lateral surface

71. math

the length and breadth of the room were measured and area calculated as 600sq.m. (l+B=50) later found the meter rod that had used as an error 5cm i.e actual length of the rod ws 95cm instead of 100cm. find the correct area of the room

72. geometric progresions

The ratio of the sum of the first 8 terms of a G.P. to the sum of the first 4 terms of the same G.P. is 97:81, where the common ratio of the G.P. is a real number. What is the common ratio?

73. Microeconomics

You are the manager of a California winery. How would you expect the following events to affect the price you receive for a bottle of wine? You may include graphs if they help illustrate your response. a)The price of comparable import wines decreases b)One

74. chemistry

e) In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?

75. english

hay i really really need help!!! im doing a poem project and it invloves explainig what does "no time to turn at beautys glance and watch her feet and how they can dance"means pleasee help me i really need help:)

76. math

A cylinder has a diameter of 80 cm and a length of 45 cm. Another cylinder has the same volume but is 80cm long. What is the diameter of the longer cylinder?

77. trig

the shadow of a tower is 2y meters longer at 30 degree than when it was at 45 degree. find the height of the tower

i need help with this quretsion ; i don't know if im right, and i dontknwo what do next question expand and simplfy: 4√7(2√3 + 3√6 - √7) my work = 8√21 + 12√42 -4√49 please help me

79. physics 12

im stuck i have no clue where to start, please help me i just know the givens and some claculations. question: kevin stands on he top of a buiulding and he throws an aboject up into the air at a velocity of 16.0m/s at an angle of 25 degrees to the

80. math

show that any positive odd integer is of the form 6q+1, 6q+3 or 6q+5, where q is any positive integer.

81. chemistry

Is Sulfuric acid -- H2SO4 ----- a carboxylic acid?

82. trig

e.g. tan 315 = -1, does that work in our equation ?? Yes, thank you again Reiny! My next question is to find sin theta and cos theta. cos 2theta = 1/3 and pi less than or equal to 2theta less than or equal to 2pi I hope Im not overburdening you with

83. Math

Karthi had RS.5000 with him. he lent a part of 12% per annum simple interest and the remaining at 15% per annum. his total annum income was Rs.700.find the sum lent at12% per annum.

84. Physics

A high voltage unit has an internal resistance of 50 mega ohms. On open circuit, the potential difference across its output is 3000 V. When a resistor R is connected across its output, the potential difference at the output falls to 1000 V. Calculate the

85. math trigonometry

A ladder 8.5m long is placed with its foot at a distance of 4m from the wall of a house and just reaches a window will . find the height of a window will and the sine and tan of the angle which the ladder makes with the wall

86. Bio 11

what is the advantage of sexual reproduction over asexual reproduction

87. math 11

An asymmetrical roof has measurements show in the diagram below. if the vertical supports are each two feet apart, calculate the measure of angle G and the slant heights (lengths x and y) of the roof.

88. English

What does it mean to be a professional? and what does it mean to be in a profession?

89. science

ZnS(aq) + 2HCl(aq) --> ZnCl2(aq) + 2H2S(g) what happens in this reaction means what changes& colour happens????

90. arithmetic

The ratio of the sum of the first 8 terms of a G.P. to the sum of the first 4 terms of the same G.P. is 97:81, where the common ratio of the G.P. is a real number. What is the common ratio?

91. math

divide the polynomial x^3-3x^2+x+2 by x+2. Express your answer in the form f(x)=d(x)q(x)+r(x).

92. Physics

Hello. I'm having difficulty with this question In the diagram, the coefficient of kinetic friction between the 2.00 kg and the 3.00 kg blocks is 0.300. The horizontal surface and the pulleys are frictionless, and the masses are released from rest. (a)

23+43

94. analytical geometry

the points M(6,-8) and E(8,6) are on a circle with radius 10 units. Determine the equation of the line equidistant from points M and E

95. maths

in a model of ship the mast is 9m high while. if the length of the actual ship is12m high.if the lenght of the ship is 28m. how long is model of ship?

96. English

Please check my work. Identify whether if this sentence is complex, an exclamation, declarative, or interrogative. The car broke down, but a rescuer van arrived within minutes. ----- Complex

97. math

I tried everthing but,I couldn't solve it. Please help me.the answer at the back is 40960.13 question: solve for x and check your solution. logx/log2 + logx/log4 + logx/log8 + logx/log16 = 25 THANK YOU FOR YOUR KIND HELP!!!!

i need help doing this question... a quadratic funtion has these characteristics axis of symmetry: -1 x=3 is the x- int y= 32 is the maximum value determine the y int of this parabola.

99. social studies

All of the following statements about Brazil's economy are true except: (A) Because of the development of gasohol, Brazil no longer has to import expensive foreign oil. (B) Industrial developments have destroyed the middle class. (C) Jobs in service