1. Physics

As a box is pushed 30 meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300 joules. How much total internal energy is produced during this process?

2. Chemistry

The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Tfusion, and

3. Chemistry

Magnetite, an iron ore with formula Fe3O4, can be reduced by treatment with hydrogen to yield iron metal and water vapor. (a) Write the balanced equation. (Use the lowest possible coefficients.) 1Fe3O4(s) + 4H2(g)-> 3Fe(s) + 4H2O(g) (b) This process

4. physics

The figure below shows the circular wave fronts emitted by two sources. Make a table with rows labeled P, Q, and R and columns labeled r1, r2, Δr, and C/D. Fill in the table for points P, Q and R, giving distances as multiples of λ and indicating, with a

5. Chemistry

How many moles of glucose , C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available. C6H12O6(s) + 602(g)---6CO2(g) + 6H2O(l)

6. physics

A CONVEX LENS PRODUCES O REAL AND INVERTED IMAGE 2.5 TIMES MAGNIFIED AT A DISTANCE OF 25CM FROM THE LENS.CALCULATE THE FOCAL LENGTH OF THE LENS,

7. math

Mary and Peter had a total of Rs 480.After Peter spent Rs 20, he had 3 times as much as Mary.How much did Mary have?

For safety in climbing, a mountaineer uses a nylon rope that is 50m long and 1.0cm in diameter. When supporting a 90kg climber, the rope elongates 1.6m. Find its Young's modulus This is what I have so far, I am getting the wrong answer. Can you please fix

9. Physics

The (nonconservative) force propelling a 1.50E3 kg car up a mountain road does 4.70E6 j of work on the car. The car starts from rest at sea level and has a speed of 27.0 m/s at an altitude of 2.00E2 m above sea level. Obtain the work done on the car by the

10. Physics

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. How much work is done by the lifting force (include units)? b.) How much work is done by the Earth on the object? c.) What is the net work done on the object? d.)

11. physics- TEST TMRW PLS HELP!

Why is the following situation impossible? A librarian lifts a book from the ground to a high shelf, doing 20.0 J of work in the lifting process. As he turns his back, the book falls off the shelf back to the ground. The gravitational force from the Earth

12. calculus

optimization find the point on the graph of the function that is closest to the given point f(X)= square root of x point:(8,0)

13. psychology 220

# 1.56 (1 pts.) Mr. Kang, a recent immigrant from China, is extremely overwhelmed and distressed by the untimely death of his wife. His co-workers are concerned about his mental health because he believes he is in constant contact with her and can be seen

14. calculus

a norman window is constructed by adjoining a semicircle to the top of an ordinary rectangular window. Find the dimensions of a Norman window of maximum area it the total perimiter is 52 feet.

15. Physics

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. The work done on object A is 500J. After the force pulled each object, object A moves twice as fast as object B. Answer the

16. Psychology 220

1.65 (1 pts.) David is a junior at the local high school. The school's administration believes his recent emotional outbursts during class may be due to problems in his home life. Who might be best suited to deal with this situation? A) the principal B) a

17. math/algebra

A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet)

18. Chemistry

At a local convenience store, you purchase a cup of coffee, but, at 98.4oC, it is too hot to drink. You add 23.0 g of ice that is –2.2oC to 248 mL of the coffee. What is the final temperature of the coffee? (Assume the heat capacity and density of the

19. Math

the ferris wheel at a carnival has a diameter of 18 m and descends to 2m above the ground at its lowest point. Assume that a rider enters a car at this point and rides the wheel for two revolutions

20. trig

An airplane flies with a speed of 425 mph and a heading of 63°. If the heading of the wind is 24°and the speed of the wind is 31 mph, what is the heading of the plane and the ground speed? I've done a couple questions like this but still a little fuzzy

21. chemistry

Calculate the number of moles of Al2O3 that are produced when 0.6 mol of Fe is produced in the following reaction. 2Al(s) + 3Fe(s)-- 3Fe(s) + Al2O3(s)

22. Physics

An ice skater of mass m is given a shove on a frozen pond. After the shove she has a speed of 2m/s. Assuming that the only horizontal force that acts on her is a slight frictional force between the blades of the skates and the ice: a.) Identify the

23. psychology 220

# 1.29 (1 pts.) Mrs. Johansen is pregnant and has accidentally been exposed to a person with German measles. She should be most concerned about the possibility of producing a child with mental retardation if she is in the A) fetal period. B) 35th week. C)

24. trigonometry

A 100-foot vertical antenna is on the roof of a building. From a point on the ground, the angle of elevation to the top and the bottom of the antenna are 51 degrees and 37 degrees, respectively. Find the height of the building to the nearest foot. How

25. calculus

If a bone is found to have 20% of its normal amount of carbon 14, how old is the bone?

26. Physics

A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a tall building. How high (in m) would he have to climb to expend an equivalent amount of work?

27. engines

1. Look at the automotive engine shown in the figure below. Auto Technician A says that the each of the camshafts in this engine makes two revolutions for every one revolution of the crankshaft. Auto Technician B says that the camshafts in this engine

28. chemistery

what pressure is exerted by 0.30 mole of CL2 in a 4.00L container at 20 degree C ?

29. english

does this sound right with grammatical errors too Odysseus sent three men to see what the land of the Lotus Eaters, who live on the flower, is about. The three men had gotten fed the Lotus and now they had no desire to go back to the ship or go back home.

30. Chemistry

A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this compound is CH, what is the molecular formula of this compound? I had some ideas as to

31. calculus

If a bone is found to have 20% of its normal amount of carbon 14, how old is the bone?

32. Life science

How long could it take an ecosystem to reach climax community in a primary succession? And a secondary succession?

33. psychology 220

1.67 (1 pts.) Shelly meets twice a week with a number of individuals who also have similar problems. They openly share their problems with others in a trusting, receptive environment which also facilitates improvement of their interpersonal skills. Shelly

34. math

if a point is equidistant from the endpoints of a segment,then the point lies on the perpendicular bisector of the segment.

35. Maths

An ice cream store sells 20 different flavors of ice cream and 3 different types of cones. How many different combinations of cone and ice cream flavor are possible, if customers are permitted to choose only one flavor of ice cream to be served in one of

36. physics

A particle starts from the origin with a velocity of 6.0 i m/s and moves in the xy plane with a constant acceleration of (-2.0i + 4.0j)m/s^2 . at he instant the particle achieves maximum positive x-coordinate, how far is it from the origin?

37. Finance

kollo enterprise has beta 0.82 real risk freerate 2.00% investors expected 3.00% future inflation rate, market risk premium is 4.70% what kollo's required rate of return?

38. Economics

n auto-service establishment has estimated its monthly cost function as follows: TC = 6000 + 10 Q where Q is the number of cars it services each months and TC represents its total cost. The firm is targeting 35,000 net monthly profit servicing 2000 cars.

39. Biology

The half-life of Carbon-14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon-14 of living organisms? Explain your calculation.

40. psychology 220

1.73 (1 pts.) Dr. Strickland has neglected to notify Gary, one of his newest clients, about the potential risks of therapy and the limits of confidentiality during therapy sessions. Dr. Strickland has not provided him with the information needed for Gary

41. Psychology 220

1.64 (1 pts.) Sangue dormido, or "sleeping blood" is a condition observed among individuals from the Cape Verde Islands (located off the west coast of Africa) and involves paralysis, convulsions, blindness, and tremors. This condition is referred to in

42. calc

Which of the following statements would always be true? I. If f is differentiable at x = c, then f is continuous at x = c. II. If f is continuous at x = c, then f is differentiable at x = c. III. If f is not continuous at x = c, then f is not

43. Chemistry

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq)--> 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 746 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a

44. torque physics

A bowling ball with a radius of 12 cm is given a backspin (i.e. if you picture the ball moving to the right it is spinning counterclockwise at the same time) of 8.3 rad/ s and a forward velocity of 8.5 m/s.As a result, the ball slides along the floor. What

45. Chemistry

Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g) What is the value of K if the following concentrations are found at equilibrium: [O2] = 0.200 mol/L, [F2] = 0.0100 mol/L, and [OF2] = 0.0633 mol/L

Some critics of corporate social responsibility view spending money on CSR as:

47. Science

How do you prepare 500mL of a 2.5M solution of NaOH from the solid compound?

48. Physics

A force compresses a bone by 0.10mm. A second bone has the same length but twice the cross-sectional area as the first. By how much would the same force compress the bone?

49. chemistry

What volume in mL of 0.0985 M sodium hydroxide solution is required to reach the equivalence point in the complete titration of a 15 mL sample of 0.124 M phosphoric acid?

Using the simplex method, solve the following linear programming problem: Maximize: P= 5x+2y Subject to: 4x+3y < or equal to 30 2x-3y < or equal to 6 x > or equal to 0, y > or equal to 0.

51. Chemistry

How many moles of aluminum are needed to react completely with 1.2 mol of FeO? 2Al(s) + 3FeO(s)-- 3Fe(s) + Al2O3(s)

52. college physics

a bullet of mass 8g is fired into a block of mass 260g that is initially at rest at the edge of a table of height 1m the bullet remains in the block and after the impact the block land d=2.20m for the bottom of the table. determine the speed of the bullet

a circle has the equation x^2+y^2+6x-6y-46=0 find the center and the radius of the euation. If there are any intercepts list them.

54. geography

Can you check my answers please? 1. Describe North Dakota's geographic borders using cardinal directions? To the North is Saskatchewan and Manitoba, Canada. To the East, it is Minnesota. To the South, it is South Dakota. To the West, it is Montana 2.Which

55. science

Most of the eastern United States and the West Coast have a climate that is- F)mountain H)desert G)polar J)temperate My answer is temperate, am i right if not please tell me why?

56. English - ms. sue

ms. sue i writing an essay on : is it possible to live a peaceful/happy life in times of today? I going to write yes it be for this essay, but teacher say that write essay by saying WE, so what be other forms of that I use, I think she said don't use they,

57. math

if 8x=5y and 3y=14z then 12x= how many z's

58. CALCULUS

a bacteria culture grows with a constant per capita growth rate. After 2 hours there are 500 bacteria and after 6 hours the count is 312500, find the initial population and the population after 8 hours

59. Physics

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. If the object is released from rest after it is lifted, what is its kinetic energy just before it hits the floor? What is its velocity? Show your work and units.

60. Chemistry

A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00g of the compound produced 2.868 g CO2 and 1.567 g H2O. In another experiment, 0.1107 g of the compound was dissolved in 25.0 g of water. This solution had a freezing point of -0.0894

61. trigonometry

Prove cotx-1/cotx+1=1-sin2x/cos2x

62. Chemistry

How many moles of aluminum are needed to react completely with 1.2 mol of FeO? 2Al(s) + 3FeO(s)-- 3Fe(s) + Al2O3(s)

63. Chemistry

Fluorine reacts with oxygen to yield oxygen difluoride. 2 F2(g) + O2(g) 2 OF2(g)K = 2.00x 10^2 (a) Calculate [O2] at equilibrium when [OF2] = 0.25 mol/L and [F2] = 0.0208 mol/L. mol/L (b) Calculate [OF2] at equilibrium when [F2] = 0.088 mol/L and [O2] =

64. physics

A U-shaped tube contains a fluid of density 1.5x10^3 kg/m^3. the right side of the tube is closed, with vacuum above the fluid. The left side of the tube is open to the atmosphere. Assume the atmospheric pressure outside the tube is exactly 10^5 Pa. a) How

65. Physics

An elevator's cable is cut causing the elevator to slide down thhe elevator shaft on the emergency brakes and wheels. Suppose that the mass of the elevator and passengers were 1500 kg, and the frictional force (wheels on tracks)was 9000N Draw a force

66. English-Grammar

Which of the following is an example of an adverbial clause fragment? A.wherever there is a chance for a fabulous meal B.who described the book as a compelling masterpiece C.that the poet choose words carefully to convey a particular tone I think the

67. PSYchology 220

1.18 (1 pts.) Harry has recently been getting lost in the factory where he works. He is forgetting some of the names of his coworkers. He is having difficulty concentrating and his reading comprehension is poor. He denies having any memory problems but

68. physics

A grinding wheel of radius 0.370 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 79.2 N • m. Find the magnitude of the friction force.

69. Psychology 220

# 1.36 (1 pts.) Based on the incidence of Fetal Alcohol Syndrome in various ethnic groups, which of the following individuals would be considered high risk? A) a woman of French Canadian descent B) a woman of Irish descent C) a woman of Italian descent D)

70. Calc-extrema

Find all relative extrema in the function h(x)=cos(2pix/3) on the interval [0,2]

71. english

does this sound write and look grammatically correct? Please and thank you(nohbdy is suppose to be spelled that way) Odysseus was brave from the rest of the crew so he led us into fooling Cyclops. He gave some wine to Cyclops to get him drunk. Then

72. chemistry

1)A solution has a [OH-] of 5.2 x 10-4. What is the [H3O+] in the solution? 2) A 0.25 M solution of a monoprotic acid, HA, has a pH of 2.54. What is Ka for this acid? The dissociation of HA is: HA + H2O H3O+ + A- (Hint: write the expression for pH) 3 A

73. Chemistry

I need help with this problem A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside

74. math

According to the statistics of a famous high school in Canada, all their graduates went to either A or B for university study. Following are the proportions of graduates who went to the two universities. University Proportion A 1-k B k Suppose k = 0.4 (a)

75. hi

What is the sixth term of the arithmetic sequence if the 10th term is 33 and the 15th term is 53.

76. chemistery

A student dissolves 196 g of H3PO4 (Molar mass = 98 g) in enough water to make one liter of solution. The molarity of the solution is ?

77. Math

If a person throws a water balloon, the height (in feet) if the water balloon is modeled by the equation: h=-16t^2-5t+100, where t is in seconds. When will the water balloon hit the ground?

78. English

1. He spent a lot of money on dancing. 2. He spent a lot of money in dancing. 3. He spent a lot of money on buying things at the shop. 4. He spent a lot of money in buying things at the shop. 5. He spent a lot of money dancing. 6. He spent a lot of money

79. Chemistry

how to prepare 100cm3 of 1.0moldm3 copper sulphate and from this prepare 100cm3 of 0.1 moldm3 solution.similarly use the 0.1moldm3 to prepare a 0.05 moldm3 ,and the 0.05moldm3 solution to prepare 0.01 moldm3 and 0.001moldm3solution.

80. precalc h

sin(theta)/1-cos(theta) + 1-cos(theta)/sin(theta) = 2csc(theta) That question makes absolutely no sense.. could someone help me? or lead me in the direction to figuring it out? and.. (Beside the trig functions is theta) 1+1/cos = tan^2/sec-1

81. math

there are 4 students sitting to receive their prizes. Alan and Julia wanted to sit together. how many different arrangements of students would there be

82. general

Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box

83. CJS/250

Will someone please help me find a website to research the following questions? Write a 750- to 1,050-word paper discussing the relationship between private and public police. Is this relationship positive or negative? Provide specific examples to support

84. statistics

A provincial politician would like to determine the average amount earned during summer employment by the provinces teenagers during the past summer’s vacation period. She wants to have 95% confidence that the sample mean is within \$25 of the actual

85. Chemistry

If the heat from burning 6.000 g of C6H6 2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ is added to 5691 g of water at 21 °C, what is the final temperature of the water? Please tell me what I am doing wrong: 293,551= 5691*4.2*(Tf-21C) 293551=

86. Chemistry

Consider the molecular level representation of a gas There are: (a picture) 6 blue dots 5 orange dots 3 green dots (i think they are the diatomic one, because it is pairs) If the partial pressure of the diatomic gas is .750, what is the total temperature?

87. Math(help)

when 120 guests take seat in an auditorium,only 34 of the seats occupied.what is the total number of seats in the auditorium?

88. Algebra

Find the real solutions of the equation by graphing. 6x^3-2x=-9x^2

89. Calculus

Let f be a continuous function on the interval [0,2] which satisfies integral of f(x)dx=5 when b is 2 and a is 0. Give this information compute the definite integral f(2y)dy when b is 1 and a is 0. Solve this

90. psychology

Fred was diagnosed as schizophrenic at age 27. According to the information presented in your textbook, what is a probable description of his life at age 68? a)He has been institutionalized for 41 years. b)He may have shown improvement or even recovery.

91. physics

A ferry boat is 4.9 m wide and 6.9 m long. When a truck pulls onto it, the boat sinks 3.34 cm in the water. What is the weight of the truck? The acceleration of gravity is 9.81 m/s2 .

92. Chemistry

When 100 mL of Ba(NO3)2 solution at 25 degrees Celsius is mixed with 100 mL solution CaSO4 solution at 25 degrees Celsius in calorimeter, the white solid BaSO4 forms and the temperature of the mixture increases to 28.1 degrees Celsius. Assuming that the

93. chemistery

How many milliliters of 4.00M NaOH wll react with 100 mL of 0.312 M H2SO4?

94. calculus

find an equation for the line with the given properties. express the equation in slope-intercept form containing the points. P=(-5,4) and Q=(-4,2) plz show work

95. psychology 220

# 1.49 (1 pts.) Donna's clinician has requested that she undergo electroconvulsive therapy in an attempt to control her current, drastic suicidal impulses. What stage of treatment is she in? A) immediate management B) assessment of objectives C) assessment

96. math/algebra

the length of a rectangular frame is 5 cm more than the width. the area inside the frame is 66 square cm. find the width of the frame.

97. Statistics of Psychology

Create a numerical and verbal hypothesis statement: People who are cyber bullied have, for the most part, been bullied in more traditional manners as well." Their research showed that the incidence increased over time, with 23 cases (56%) taking place

98. Social Studies

What did railroads contribute to the development of the west? Pls Help! Soical studies is my worst subject ever! Thanks if you can help!

99. Statistics

Bottles of a popular cola contain a mean amount of 300 mL of cola. There is some variation from bottle to bottle because the filling machinery is not perfectly precise. The distribution of the contents is normal with a standard deviation of 3 mL. a) What

100. physics

A 20.0kg solid gold statue is raised from the sea bottom. What is the tension in the hoisting cable (assumed massless) when the statue is accelerating upward at 2m/s^2? (assume the statue is still completely underwater) The density of gold is

101. geometry math

how many different triangles can be traces along the line segments in the diagram below?

102. physics

)A block with mass m = 11.3 kg slides down an inclined plane of slope angle 43.4 ° with a constant velocity. It is then projected up the same plane with an initial speed 1.45 m/s. How far up the incline will the block move before coming to rest?

103. Social Studies

What was the purpose of the Homstead Act? Did congress achieve this goal? I got what the homstead act was, but i'm confused on the second part. I put that congress did not achieve there goal because only about 20% of the homstead land went directly to

104. algebra

of radius 54 meters subtended by the central angle 1/9 radian. s(arc length = meters How is the answer 6? s denotes the lenght of the arc of a circle of radius r subtended by the central angle 0. Find the missing quantity. The radius r of the circle is ?

asked by Find the length s of the arc of a circle
105. GENERAL

Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box

106. Chemistry

A 0.75–L bottle is cleaned, dried, and closed in a room where the air is 22oC and 44% relative humidity (that is, the water vapour in the air is 0.44 of the equilibrium vapour pressure at 22oC). The bottle is brought outside and stored at 0.0oC. a) What

107. calculus

use differentials to approximate the value of the expression: square root of 64.07

108. Psychology 220

1.68 (1 pts.) In order to evaluate the effectiveness of a new psychotherapeutic technique, Dr. Schwartz is testing the therapy on clients that have sought treatment from him at his private practice. According to Martin Seligman, Dr. Schwartz is conducting

109. Physics

A plane is ﬂying horizontally with speed 152 m/s at a height 2110 m above the ground, when a package is dropped from the plane. The acceleration of gravity is 9.8 m/s 2 . Neglecting air resistance,A second package is thrown downward from the plane with a

find the line with the given properties. Parellel to the line 7x-y= -7; containing rhe point (0,0) plz show work

111. Chemisrty

A 10.0 g sample of ice at -14.0°C is mixed with 124.0 g of water at 81.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the

112. Physical Education

What is the average weight for 8th grade girls?

113. Trigonometry

IM STUCK ON THESE :( 1. What is the equation for shifting the standard sine curve +2 units horizontally? A. y = sin (x + 2) B. y = sin x + 2 C. y = sin x − 2 D. y = sin (x − 2) 3. What is tan-¹ √3/3 ? A. π/4 B. -π/3 C. π/6 D. -π/4 4. cot–1

114. Chemistry

How much energy, in joules, must be absorbed to convert to Na+ all the atoms present in 1.00mg of gaseous Na? The first ionization energy of Na is 495.8 kJ/mol

115. psychology 220

# 1.55 (1 pts.) Which of the following information led Dr. Tobin to conclude that Peter was suffering from bipolar disorder? A) the fact that he reported having intense bouts of anxiety B) the fact that he had recently been married and soon after was

116. algebra/math

the length of a rectangular flower bed is 7 feet less than 3 times its width. the area of the bed is 20 feet squared. find the dimensions of the flower bed.

117. poli sci

Which of the fundamental American political values does the "Tea Party" most fundamentally support? Do you believe the "Tea Party" is a legitimate heir of the Founding Father's protest against the British? Do you believe the Tea Party will transform

118. Statistics

A number of grade school students were asked about their perceived math ability and the results are in the table below. Below Average = BA Average = A Above Average = AV BA A AV Girls 61 54 21 Boys 43 61 42 Test at the 0.01 level if there is a difference

119. Intermediate Algebra

Your gas bill varies directly as the amount of gas used. The bill for 2800 cubic feet of gas comes to \$196. If you used 1400 cubic feet of gas, what will the bill be?

120. physics

A child and sled with a combined mass of 58.9 kg slide down a frictionless hill that is 8.09 m high at an angle of 23◦ from horizontal. The acceleration of gravity is 9.81 m/s2 . If the sled starts from rest, what is its speed at the bottom of the hill?

121. Math

Let f(x) = x - 5 and g(x) = 1/2x^3. Find g^-1(108). Write an expression for (f•g)(x). Solve equation (f•g)(x)= 27.

122. math

A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet)

123. psychology

By dissociating key parts of personality, people are able to keep ___________ from reaching conscious awareness, thereby reducing their anxiety. a)symptoms b)compulsions c)confused thoughts d)disturbing memories

124. Q Research

2. The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a standard deviation of 15 minutes. Assume that the commute times are normally distributed. What proportion of commutes would be: a. longer than 80

125. Physics

A truck is moving 40 m/s when it encounters a ramp inclined by 30% above the horizontal. Gravel provides a frictional force to slow the truck and has a coefficient of friction(.5). How far along the ramp would the truck travel before coming to a stop?

126. MATH!!!!!!!!!!!! I need help please

Simplify Complex fraction: (x-1) ----- (x-3) --------- 1 4 ---- - ---- x2-x-6 (x+2)

127. psychology 220

# 1.66 (1 pts.) James is a person with schizophrenia and has delusions that the CIA is after him. He believes that everyone on the street is trying to kill him and, as a matter of fact, he has been brought to a psychologist by the police after being

128. Chemis

Steve, in an attempt to impress his girlfriend, plops 18.2 grams of sodium metal into 500 mL of concentrated phosphoric acid (density = 1.88 g/cm3) in a beaker. The reactants were both initially at 25 oC. The reaction gently produced bubbles of hydrogen

129. Calculus

Evaluate the limit as h approaches zero of (the cubed root of 8-h)-2/h. Can also be written ((8-h)^1/3)-2)/h

130. chemistery

in a solution of pH of 3.26, the molar concentration of the hydronium ion is ?

131. psychology 220

1.71 (1 pts.) Wendy has been involuntarily committed to a psychiatric hospital. When she tries to use the ward pay phone, the staff members stand nearby and listen to her conversation. Occasionally they have actually interrupted her calls and have hung the

132. calculus

How many gallons of gas is in a cylindrical tank (that is laying on it’s side, the circular bases are vertical, the diameter of the bases are 5 feet, the length of the tank is 8 feet, the gas is at a 2 ft level)?

133. statistics

18 workers at a large assembly plant were asked the time it took to commute to work. The data was analyzed in Minitab and the Descriptive Statistics for the data appears below. Descriptive Statistics: Minutes Variable N Mean Median TrMean StDev SE Mean

134. algerbra

Katy has a rectangle field that is 700 feet wide one portion of the field is 2x long the other portion is 14y. Use the distributive property to find an expression for the area of the field.

135. biology

Stem cells may open the door to discoveries about many diseases and may allow treatments for diseases to be developed. However many ethical issues surround stem cell research which need to be addressed by scientists, governments, etc. a. Explain why

136. Social Studies

These are mulitpal choice: Reforms failed because Indians did not want to become (farmers, or miners) and reservation life changed their culture.

137. PSYchology 220

# 1.59 (1 pts.) Ralph has been sad and listless for 3 years. He can't sleep and has lost his appetite. Using a diagnostic system, one clinician arrives at a diagnosis of depression. Using the exact same diagnostic system, another clinician arrives at a

138. calculus

find the equation of line L. L is parellel to y=4x show work pleaase..

139. maths --plse help me..

Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7 .

140. psychology 220

# 1.62 (1 pts.) A psychologist suspects that Dan's psychotic episode may be related to the recent death of his wife. On which DSM-IV Axis would this stressful event be recorded? A) Axis I B) Axis II C) Axis III D) Axis IV (My answer is D) Am i right?

141. Keyboarding and word processing

If you're compling a list of sources you used for your report in MLA style, the list is called a A. references list B. bigliography C. work-cited list. D. source list. I think the answer is "C"

142. Q. Research

3. Bob takes an online IQ test and finds that his IQ according to the test is 134. Assuming that the mean IQ is 100, the standard deviation is 15, and the distribution of IQ scores is normal, what proportion of the population would score higher than Bob?

143. Psychology 220

1.63 (1 pts.) Robert has a serious drinking problem, but his therapist feels that the drinking is a result of Robert's constant bouts with depression. Based on this information, what would Robert's principle diagnosis be? A) alcoholism B) bipolar disorder

144. Psychology 220

# 1.55 (1 pts.) Which of the following information led Dr. Tobin to conclude that Peter was suffering from bipolar disorder? A) the fact that he reported having intense bouts of anxiety B) the fact that he had recently been married and soon after was

write the standard form of the equation and the general form of the equation of the circle with radius r and center (h,k) r=10; (h,k)=(8,-6)

146. math

the ph of a solution is 3.6 what is it hydrogen ion concentration

147. phicicks

A 0.300- kg brass block is attached to a spring of negligible mass. What is the value of the spring constant if the vibrational frequency is 0.855Hz?

148. physics

A truck travels up a hill with a 10 ◦ incline. The truck has a constant speed of 21 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s What is the vertical component of the truck’s velocity? Answer in units of m/s

149. math

A boat travels down the river in 2.8 hours. The return trip up river takes 3.8 hours. A one way trip down or up river is a distance of 24 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

150. Math

A ladder leans against a vertical wall and the top of the ladder is sliding down the wall at a constant rate of 1/2 ft/sec. At the moment when the top of the ladder is 16 feet above the ground, the bottom of the ladder is sliding away from the wall

151. chemistry

Steve, in an attempt to impress his girlfriend, plops 18.2 grams of sodium metal into 500 mL of concentrated phosphoric acid (density = 1.88 g/cm3) in a beaker. The reactants were both initially at 25 oC. The reaction gently produced bubbles of hydrogen

152. psychology 220

1.72 (1 pts.) Which of the following types of disorders would not meet the criteria for insanity according to the Insanity Defense Reform Act of 1984? A) schizophrenia B) major depression C) bipolar disorder D) antisocial personality disorder (my answer is

153. analytic geometry

What can be said of points with equal ordinates? with equal abscissa?

154. 5th grade math (dividing fractions)

Hi.. I need help figuring out this problem, sovling for x: 3 divided by x/9 = 5 and 2/5 I was able to solve: x divided by 3/4 = 6 by multiplying 6 x 3/4 = 4 1/2. Just not sure how to solve the first problem. If I change 5 2/5 into mixed number,I still

155. Statistics

3. A professor is interested in whether there is a difference in counseling students’ statistics competency scores among 1) those who have never taken any statistics course, 2) those who have only taken an undergraduate statistics course, 3) those who

156. statics

A 10kg block rest on top of a 50kg block. A force of 120n is being pushed on the 10kg block at an angle of 45 deg. What is the magnitude of frictional force between the blocks? The cofficient is force is .4

157. physics- TEST TMRW PLS HELP!

how would i do this? -----------------A-----------B-------- Illl a carpenter carries a 6kg board . the downward force he feels on his shoulder (A) is .... ? (B is where his hand is) pls help!! i have so much difficulty with these questions!!!

what are the most difficult aspects of simultaneously balancing the four perspectives in the balanced scorecard?

159. combusion -science

the reaction order with respect to C4H10 =.15 and the reaction order with respect to O=1.6 , the pre exponential factor =4.16.10^9 . the activation energy =125000 kl/kaul. write out an expression for the rate of butane destruction

160. English/reporting

I need this paragraph proofread To test Erdman’s statement, Deja Guinn, a Christian and senior at WMU decided to join the SSA group. Guinn says unlike most of the group members, who are atheist agnostic, she is a Christian and believes in how Jesus

161. calculus

find the distanced(p_1&P_2) between points P_1 and P_2. P_1=(4,-5) and P_2=(3,4) plz show work

162. Statistics

Bottles of a popular cola contain a mean amount of 300 mL of cola. There is some variation from bottle to bottle because the filling machinery is not perfectly precise. The distribution of the contents is normal with a standard deviation of 3 mL. a) What

163. calculus

find the midpoint of the line segment joining the points P_1 and P_2. P_1=(-2,6); P_2=(5,0) m=(x,y) please show work

164. calculus

find the distance d(P_1 & P_1) between points P_1 and P_2. P_1=(4,-5)and P_2=(3,4) please show work

A usefful personal and business investment site with in-depth detail on personal financial planning. After reading a March 19,2009 , article"Preparing a Portfolio for Retirement," Arlene Supple, 47 years old, is evaluating her retirement portifolio. She

166. English narrative

Hello and thanks for starting reading this post :) I have written a english narrative that has very very bad grammar and the rest... :D I would be very thankful if you could help me fix that narrative :) Here it is (BTW it is not a real story, I made it up

167. Algebra 2..

Solve. 1. (-16)^1/4 2. -16^1/4 *Please post some links so I can have extra practice.

168. Social Studies

What were Boomtowns and ghost towns? My history book dosn't describe it very well! Thanks for your help!

169. college biology

if you have a father who is type A heterozygote blood and married to a woman who is type B heterozygote blood, find all the children's possible blood types and ratios.

170. Statistics of Psychology

Create a numerical and verbal hypothesis statement: People who are cyber bullied have, for the most part, been bullied in more traditional manners as well." Their research showed that the incidence increased over time, with 23 cases (56%) taking place

172. English

Posted by rfvv on Sunday, December 9, 2012 at 8:06pm. 1. He spent a lot of money on dancing. 2. He spent a lot of money in dancing. 3. He spent a lot of money on buying things at the shop. 4. He spent a lot of money in buying things at the shop. 5. He

173. math

How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution?

174. Chemistry

The Ksp value for FeS is 6 x 10^-18 M. FeS(s) --> Fe^(2+)(aq) + S^(2-)(aq) What is DG at 25 degrees C for the reaction?

175. SOCIALS HELP...THANX

This question is based on: the Reign of Terror which government replaced Robespierre and what did that signify for France? Pleese help... Thanx

176. algebra

A family refers to a group of two or more people related by birth, marriage, or adoption who reside together. In 2000, in Country A, the average family net worth was \$460,000, and there were about 7.6*10 to the seventh power families. Calculate the total

177. Math

The line L has equation of 4x + 3y = 7. Find the equation of the line perpendicular to L which passes through the point of intersection of L and the y-axis. Give answer in ax + by + c = 0.

178. chemistry

How many gallons of C6H12 , measured at 20 degrees Celsius, must be burned to provide enough heat to warm 26.4m3 of water from 17.4 degrees Celsius to 32.8 degrees Celsious , assuming that all the heat of combustion is transferred to the water, which has a

179. Statistics

90% of the world’s large corporations are actively involved in data warehousing. In a random sample of 10 large corporations, what is the probability that at least 8 of them are actively involved in data warehousing.

180. Statistics

A provincial politician would like to determine the average amount earned during summer employment by the provinces teenagers during the past summer’s vacation period. She wants to have 95% confidence that the sample mean is within \$25 of the actual

181. Statistics

18 workers at a large assembly plant were asked the time it took to commute to work. The data was analyzed in Minitab and the Descriptive Statistics for the data appears below. Descriptive Statistics: Minutes Variable N Mean Median TrMean StDev SE Mean

182. Statistics

Cigarette companies advertise that the mean amount of nicotine in each cigarette is 1.4 milligrams. A health advocacy group believes that the amount of nicotine is greater than the advertised amount. They hire a consultant who collects a sample of size 31

183. Social Studies

true or false: many cowhands on the cattle drives were chinese imigrants, african americans,or veterans of the confederate Army. I guessed false and instead of chinese imigrants, i think it's Vaqueros? but i don't know?

184. stem cells

Stem cells may open the door to discoveries about many diseases and may allow treatments for diseases to be developed. However many ethical issues surround stem cell research which need to be addressed by scientists, governments, etc. a. Explain why

185. Statistics

The data below represents six years of the harvest of oranges in millions of boxes and the price per 75 pound box. (a) Plot the data and calculate the regression line. Plot that line. (b)Calculate the coefficient of determination (c)What percent of the

186. Intermediate Algebra

A car travels 30 miles in the same time that a car traveling 5 miles per hours faster travels 45 miles. What is the rate of each car?

187. Intermediate Algebra

A painter can paint a fence in 12 hours working alone. His apprentice who works slower can paint the same fence in 24 hours. How many hours would it take to do the job if they worked together?

188. Economics

Assuming a constant marginal cost, a lower price elasticity of demand would call for a relatively lower mark-up ration.

189. Intermediate Algebra

The amount of current flowing into an electrical circuit varies inversely as the resistance in the circuit. When the resistance of a particular circuit is 5 ohms, the current is 42 amperes. what is the current when the resistance is 4 ohms?

190. Social Studies

These are multipal choice: According to the (Dawes Act,or Fort Laramie Treaty), Indians would receive money,domestic animals,tools,and land that would be theirs forever.

191. math

I need to find the sum of 2/5 and 3/4. The LCD is 20 so I did 2x4=8 and 3x5=15. so I got 8/20 + 15/20 = 23/20, but this does not match any of the answers I have to pick from. What am I doing wrong?

192. psychology

Recent neuroimaging research indicates that people with OCD show increased levels of grey matter in the _____ and the _____ relative to those who do not have OCD. 1)splenium; corpus collosum 2)locus ceruleus; hypothalamus 3)thalamus; left frontal cortex

193. psychology

Marla is talking to a friend and spreading a rumor that she heard about a co-worker. When the friend asks where she heard the rumor, Marla cannot remember. Marla is experiencing what psychologists call 1)retrograde amnesia. 2)anterograde amnesia. 3)source

194. geometry math

three teenagers can eat 6 pizzas in half an hour. Assuming that their friends eat at the same rate, how many pizzas can 5 teenagers eat in 90 minutes?

195. Dynamics

A 20-lb disk has a radius of 1ft and can roll without slip on a rough plane that is inclined by an angle è to the horizontal. The disk is attached to the lower end of a linear spring of stiffness 10lb/in. The upper end of the spring is attached to a wall.

196. physics

)A block with mass m = 11.3 kg slides down an inclined plane of slope angle 43.4 ° with a constant velocity. It is then projected up the same plane with an initial speed 1.45 m/s. How far up the incline will the block move before coming to rest?

197. english

does this sound write and look grammatically correct? Please and thank you Odysseus the Curious took us inside a cave to eat. After we ate some cheeses the ugly Cyclops came along with his flock of sheep and rams. He put a gigantic boulder to block the

198. algebra

90 degress= ? radians How is the answer pie over 2? 330 degrees = 11pie over 6 -105 degrees= -7pie over 12 Converting the angle in radians to degrees 3pie over 4 =135 degrees pie over 2 = 90 degrees pie over 30 = 6 degrees -7pie over 5 =-135 degrees I have

199. algebra

90 degress= ? radians How is the answer pie over 2? 330 degrees = 11pie over 6 -105 degrees= -7pie over 12 Converting the angle in radians to degrees 3pie over 4 =135 degrees pie over 2 = 90 degrees pie over 30 = 6 degrees -7pie over 5 =-135 degrees I have

200. math

a computer store sold a total of 300 items last month. the store sold six times as amny hard drives as they did CD-ROM drives, andhalf as many floppy drives as hard drives. based on this information, how many of each items were sold

201. math

multiply the fraction 9/15 by the fraction 30/72 and reduce your answer to the lowest terms

202. PSYchology 220

1.60 (1 pts.) "Coughing, sniffling, sneezing, runny nose, achiness, scratchy throat, and inability to sleep." This collection of symptoms represents a A) constellation. B) diagnosis. C) prognosis. D) syndrome. (MY answer is D) AM I RIGHT?

203. Ms.Sue 1 more time

The Secular Student Alliance will resume their meetings on January 13th, 2013. The meetings will take place at the Bernhard Center in the Martin Luther King room, room 214 at 4:00 PM. Erdman says that he hopes the group will continue to grow, even if you

204. Intermiate Algebra

Reduce the Rational expression to lowest terms: 3x2-9x+6/10-5x

205. math

Sue was in excellent shape in high school, she could ride her 10-speed bicycle 4.8miles to her grandmother's house in 11 minutes. Her return trip home took 14 minutes. The times are different due to there being a slight downhill slop on part of the trip to

206. Calculus

Find the critical numbers of f, find the open intervals on which the function is increasing or decreasing and use the first derivative test to identify all relative extremes f(x) = 3 + cos^2 x 0

207. calculus

I have two questions please. 1. find an equation for the line with the given properties. Express in slope-inntercept form. 2. find the equation of a line that is perpendicular to the line y=1/2x+4 and contains the point (-3,0) please show work

208. calculus

I have two questions please. 1. find an equation for the line with the given properties. Express in slope-inntercept form. 2. find the equation of a line that is perpendicular to the line y=1/2x+4 and contains the point (-3,0) please show work

209. Algebra!!

(x-1)/(x-3)/1/x2-x-6-4/(x+2)

210. SCIENCE

AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE

211. math pre-calc h

It says which expressiion is equivalent to sec T + csc T / 1+tan T a. sin t b. cos t c. tan t d. csc t I'm not sure what to do first to find it out.

I can get part of the answer then I get stumped. find the center and radius of the circle, Write the standard form of the equation. (4,3)(1,3) to get center: (1+4/2, 3+3/2)=5/2,3 answer:5/2,3 for center radius: then i am stuck

213. math

solve by completing the square x^2-3x=4 please show work

214. algebra

-4r^2+21r=r+13 3s^2-26s+2=5s^2+1 Please, please could you be so nice and help me with step by step, I can't find right solution, Thank you so much!!!!

215. Chemistry

What is true for water? A) In a phase diagram the solid-liquid coexistance line has a negative slope. B) In a phase diagram the solid-liquid coexistance line has a positive slope. C) The solid is more dense than the liquid. D) The solid is less dense than

216. Music

i have a test tommorrow and i need help! What is that one note called that has 4 beats?

a Geiger ionization chamber contains 60 cubic cm of air and records 500 mR/min. calculate (a). the current produce by the chamber (b). the total number of ion pairs produced per hour of exposure. please answer, thank you!,

218. Math -urgent :)

Hello A straight line passes through the point (1,27) and intersects the positive x-axis at the point A and the positive y-axis at the point B.Find the shortest possible distance between A and B.. Pleaase could you help me? Thank you in advance

219. General chemistry

The density of the vapor of a compound at 95 degrees C and 827 mmhg is 7.41 grams/liter. Calculate the molecular weight.

220. psychology 220

1.69 (1 pts.) Dr. Ramirez is a clinical psychologist who treats individuals with somatoform disorders, yet he is still troubled by his own somatic complaints. Which of the following roles and responsibilities would be in question in this case? A) therapist

221. maths

Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7 .

222. Calc-Derivative

Find the derivative of x^(1/x). Can someone show me steps for this problem...I go round in circles

223. kendriya vidyalaya

calculate the mass of the following 1)3.11* 10 to the power 23 atoms of o.

224. chemistery

the mass percent of a solution prepared by dissolving 0.500 moll KCL ( Molar mass = 74.6 g) in 850 g of water is ?

225. psychology 220

A) Alzheimer's clients suffer from sudden cognitive losses; clients with vascular dementia suffer from gradual losses. B) Alzheimer's clients suffer from global cognitive losses; clients with vascular dementia suffer from selective losses. C) Alzheimer's

226. psychology 220

1.72 (1 pts.) Which of the following types of disorders would not meet the criteria for insanity according to the Insanity Defense Reform Act of 1984? A) schizophrenia B) major depression C) bipolar disorder D) antisocial personality disorder (my answer is

227. calculus

The base of a cell phone tower is an equilateral triangle with sides 10 ft long. How far is one corner of the triangle from the center of the of the triangle?

228. Trigonometry

Stuck :( 1. Simplify (5-√-36)(2+√-1) A. 16 − 7i B. 16 + 7i C. 4 + 7i 2. Choose the point that lies on the curve r = 2 – 3 sin θ. A. (-5, 3π/3) B. (-2, π) C. (1, π/2) 3. Which of the following is not an approximate solution of x5 – 1 = 0? A.

229. Chemistry

At constant volume, the heat combustion of a particular compound is -3447.0 KJ/mol. When 1.205 g of this compound (molar mass = 119.94 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.007

230. Mathematics of Retailing

An owner of a laundry shop received an invoice for purchasing 200 bottles of liquid detergent at RM15 each, and 300 bottles of fabric softener at RM8 each. The invoice dated on 6th August 2010. He was offered trade discount 10% and 8%, with cash discount

231. Math

What is the equation in point-slope form of the line that passes through the given point(1,3); M=5?

232. pre-cal

find the intercepts. y=2x-2 show work

233. Algebra

Solve the inequality and graph. 7-12 Is that correct?

234. math

percent of change 20 is decreased to 11. What is the percent of change?

235. math steve

steve can you explain step by step please 8x=5y and 3y=14z then 12x= how many z's

236. math

3 boys and 3 girls,how many boy - girl pairs can be formed ?

237. physics

An object is placed 5 cm in front of a concave lens of focal length 7 cm. Find the image location by drawing a ray tracing diagram to scale.

238. math

25 is increase to 100 What is the percent of change?

239. maths

Let a,b,c be positive integers such that a divides b^2 , b divides c^2 and c divides a^2 . Prove that abc divides (a + b + c)^7 .

240. Ms.Sue

The Secular Student Alliance will resume their meetings on January 13th, 2013. Again at the Bernhard Center in the Martin Luther King room 214 at 4:00 PM. Erdman says big their primary wish is to bring more people into the group, even those who are not

241. math

we decided on a new logo for our brand of shirts.It was to be 3 stripes. How many different logos we make, if we used 3 colors

242. physics

how much energy would it take to melt 250kg of lead assuming it starts at 30 degrees centigrade.

243. english

does this sound and look grammatically correct? The ruined city of Troy looked to be a catastrophic place. There was blood everywhere. Men’s bodies were cut open and infants were crying. The whole city looked as Poseidon, the god of earthquakes, gave

244. Chemistry

Assume that 57.0 cal of heat is applied to a 28g sample of sulfur at 27 degrees C. What is the final temperature of the sample if the specific heat of sulfur is 0.175 cal/g degrees C?

245. algebra

y - 2 = -2(x - 3)

246. british lit

what are the ALLUSIONs in the book Frankenstein? I need help with a list of seven of them.

247. Statistics

A tax specialist knows that tax refunds for people who use a firm to do their tax returns are normally distributed with a mean of \$150 and a standard deviation of \$43. The specialist believes that the company, Taxco, uses under trained staff and gets a

248. Intermediate Algebra

in still water, a paddle boat averages 10 miles per hour. It takes the boat the same amount of time to travel 36 mile downstream, with the current as 24 miles upstream, against the current. What is the rate of the water's current?

249. chemistry

If you add 2 liters of .45% NaCl to 36 liters of blood that has a pH balance of 7.44, what will the new pH be?

250. Math

\$5000 for 4yrs at 3.2% compounding monthly Find the amount of interest earned?

251. Intermediate Algebra

You are 6 feet in height. If you are standing away from the base of the lamppost, you can see where your shadow stops. If you are 10 feet from the base of the lamppost and your shadow stops 5 feet from where you stand, what is the height of the lamppost?

252. chemistry

If you add 2 liters of .45% NaCl to 36 liters of blood that has a pH balance of 7.44, what will the new pH be?

253. Math

A curve has equation y= 2 + x - x^2. Find coordinates of 3 unknown points on the line. 1st point is at negative x, y value. 2nd point is at x=0 and y is positive. 3rd value is at y=o and x is positive.

254. psychology

how can i explain racism in relations to cognitive perspective?

255. Math

a. Express f(x)=x^2 - 6x + 14 in the form f(x)=(x-h)^2 + k, where h and k are to be determined. b.Hence, or otherwise, write down the coordinates of the vertex of the parabola equation y=x^2 - 6x + 14.

256. calc-tangent line

find the equation to the line tangent to y=(x+3)^(1/3) at x=-3.

257. calc

Find the slope of the tangent line to the graph y = x-3 at the point (0.5, 8)

259. calc

find derivative d/dt of sec * square root of t

260. Calc

If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3

261. Algr 1

When your graphing linear equations the rate of change can be the same as?

262. Math Definition Algr

When your graphing linear equations the rate of change can be the same as?

263. PSYchology 220

# 1.61 (1 pts.) Dr. Johnson believes that the frequency and intensity of compulsive behavior exists on a continuum from mild to severe. Dr. Johnson prefers to use which approach when viewing this behavior? A) categorical B) dimensional C) medical D)

264. chemistry

A 0.200g sample containing mn02 was dissolved and analyzed by addiction of 50ml of 0.100M fe to drive the reation. The excess fe required 15ml of 0.0200 m kmn04. Find % mn304 fw 228.8mg/mmol in the sample? who helps me

265. math

320ml of active ingredient is added to 680ml of an alcohol base solution. what is the final strength (v/v)?

266. calculus

find the points of inflection and discuss the concavity of the graph of the function f(x) = -sin x + cos X 0

267. calculus

determine whether the mean value theorem can be applied to f on the closed interval [a,b]. If the Mean Value Theorem can be applied, find all values of c in the open interval (a,b) such that f(c) =f(b) - f(a) / b - a

268. calculus

find the differential dy of the given function y=3x-4 sec(2x-1)

269. Calculus

lim as x->infinity [(x^3+x^2)^1/3] - [(x^3-x^2)^1/3]

270. physics

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?

271. physics

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?

272. Psychology 220

1.60 (1 pts.) "Coughing, sniffling, sneezing, runny nose, achiness, scratchy throat, and inability to sleep." This collection of symptoms represents a A) constellation. B) diagnosis. C) prognosis. D) syndrome. (MY answer is B) AM I RIGHT?

273. physics

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?

274. physics

pls explain this to me ? "momentum is inertia....but inertia is NOT momentum" :S confused

276. math

find the maximum and minimum values of f(x,y)=y-3x for feasible regions

277. Physics

If a sphere and paper are dropped from 10 meters and the sphere hit the ground in 1.4 seconds and the paper hit in 2 seconds, why did the impact time in case of the piece of paper change in comparison to the sphere? A. a=(Wt-R)/m;a=g B. a=(Wt-R)/m;a>g C.

278. physics

An elevator weigting 400 kg/s is to be lifted up at a constant velovity of 3cm/s.what would be the minimum power of the motor to be used ?

279. calculus

find the center (h,k) and radius r of the circle and then use these to (a)graph circle, (b) find intercepts if any

280. English

Identify the nouns and verb/verb phrases in the sentence. Employers value honesty and hard work. Nouns: Employers, honesty, and work Verb: Value

281. Calculus

find the derivative (df/dx) of the squareroot of sin4x

282. math

If a point is equidistantf rom th€ €ndpointso f a segm€ntt,h en thc poinl lies on thc perpendicular bisector of the segment

283. Chemistry

Explain in step by step and provide calculations to show how you can prepare 1.50 L of 0.10 M H2SO4 solution starting with 16 M H2SO4

284. Calculus

Suppose a reflector is attached to a 26 inch diameter bike wheel, 8 inches from the center. If the bike wheel rolls without slipping, find parametric equations for the position of the reflector. I thing i use parametrics????

285. college algebra-plz help

a circle has the equation 3(x-5)^2_3y^2=12. Find the center and radius and graph the circle. find the intercepts, if any. plz show work

286. Science

Convert 150g Hydrogen Fluoride (Molecular Weight 20) to moles

287. Astronomy

Enter the expression for kinetic energy ( ) below. Use m_1 for mass and v for velocity.

288. Math

Sue was in excellent shape in high school, she could ride her 10-speed bicycle 4.8miles to her grandmother's house in 11 minutes. Her return trip home took 14 minutes. The times are different due to there being a slight downhill slop on part of the trip to

289. math

Bernie put in a garden in her back yard. The garden has a perimeter of 272 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5

290. Anthropology

The difference between a state and a cheifdom is?

291. math

Show that -1/2+ 1/2(i3 root) is a cube root of 1

292. accounting

By Saturday, January 5, 2013, submit the following assignment: As a financial consultant, you have contracted with Wheel Industries to evaluate their procedures involving the evaluation of long term investment opportunities. You have agreed to provide a

293. chemistry

please explain How % errors would affected the mass/moles of substances in lab?

294. physics

how much heat enrgy must be taken in 24 gram of water to reduce the temperature of 7 degrres celcius

295. physics- TEST TMRW PLS HELP!

w w w . m e d i a . c h e g g c d n . c o m / m e d i a / a c 3 / a c 3 b b 1 e 1 - 5 b a 8 - 4 1 9 e - 9 a 8 4 -a d 5 0 e 4 6 a 2 9 4 e / p h p s U O o L 3 .p n g (delete all spaces for link to work) Determine the magnitude of the resultant moment

296. algebra

X^2 * x+15 X^2+7 x

297. algebra

X^2 x+15 ----- * ------ = X^2+7 x

298. chemistery

A gas occupied 224 L at 25 c . At what temperature would this gas occupy 164 liters pressure constants

299. history

compare the status of Europe and the United States after World War I. How were they different financially, politically, and psychologically?

300. Calculus

Find the equation of the tangent line to the graph of 4y^2− xy − 3 = 0, at the point P=(1,1)

301. math

A number has 2 digits. The digit in the tens place is 4 times bigger than the digit in the ones place. If the product of the digits is 16, what is the number ?

302. algebra II

examples of sum and product of two numbers.

303. Physics

If a sphere and paper are dropped from 10 meters and the sphere hit the ground in 1.4 seconds and the paper hit in 2 seconds, why did the impact time in case of the piece of paper change in comparison to the sphere? A. a=(Wt-R)/m;a=g B. a=(Wt-R)/m;a>g C.

304. Physics

Pretend the hot brick extracts heat from the cold brick and becomes hotter. Would this violate the Law of Conservation of Energy?

305. Math

Find the value of each expression using the pemdas method. 5(to the second power)+8 divided by 2

306. Statistics

A tax specialist knows that tax refunds for people who use a firm to do their tax returns are normally distributed with a mean of \$150 and a standard deviation of \$43. The specialist believes that the company, Taxco, uses under trained staff and gets a