# Questions Asked onOctober 26, 2011

1. ## Science

Use the terms atom and element to explain what makes silver and gold different.

2. ## chemistry

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(l) ¨ Ca(OH)2(s) In a particular experiment, a 2.00-g sample of CaO is reacted with excess water and 2.14 g of Ca(OH)2 is recovered. What is the percent

3. ## CHEMISTRY

for the reaction system H2 + X2 2HX Kc = 24.4 at 300 K a system made up fron these components which is at equilibrium contains 0.150 moles of H2 and 0.600 moles of HX in a 3.00 liter. calculate the number of moles of X2 present at equilibrium.

4. ## Maths

A right pyramid on a base 4cm square has a slant edge of 6cm.calculate the volume of the pyramid

5. ## Algebra 2 -Linear Programming

Find the values of x and y that maximize or minimize the objective function. x+y < or equal to 8 2x+y < or equal to 10 x> or equal to 0, y > or equal to 0 A. (0,5) Maximum value is 100 B.(1,7) Maximum value is 220 C.(2,6) Maximum value is 280 D. (5,0)

6. ## Science

Use the terms atom and element to explain what makes silver and gold different. I've looked online but can not find an answer. Please help and thanks.

7. ## chemistry

3.6 g of a hydrocarbon fuel is burned in a calorimeter that contains a 244 grams of water initally at 25.00 degrees C. After the combustion the temperature is 26.55 degrees C. How much heat is evolved per gram of fuel burned? The heat capacity of the

8. ## Help. Physics

At the center of a 41.0 m diameter circular ice rink, a 61.0 kg skater traveling north at 1.05 m/s collides with and holds onto a 77.0 kg skater who had been heading west at 1.90 m/s. How long (in seconds) will it take them to reach the edge of the rink

9. ## Statistics

A survey organization takes a simple random sample of 625 households from a city of 80,000 households. On the average, there are 2.30 persons per sample household, and the SD is 1.75. Say whether each of the following statements are True or false and

10. ## OChem

A solution consisting of water and ethanol is found to have a refractive index of 1.3541 at 20 degrees C. The refractive indices at 20 degrees C of water and ethanol are 1.3330 and 1.3610, respectively. Determine the molar composition (in percent) of the

11. ## SOCIAL STUDIES

What state has a southwestern border with Colorado and an eastern border with Iowa?

A farmer has 120 feet of fencing available to build a rectangular pen for her pygmy goats. She wants to give them as much room as possible to run. What are the dimensions of the rectangular pen with the largest area?

13. ## Chem 101

Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter to the maximum temperature.

14. ## Calculus

Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x)=5+x grams/c^m2. I know that to get the total mass i have to do density* lenght and ingegrate, but I

15. ## physics

A 170 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 53 m below the rim. A student (majoring in linguistics and physics) decides to perform a rescue/experiment using a nearby horse. After

16. ## Chemistry

In the Formula... Na+ + NO2- + HSO3NH2 -> HSO4- + H2O + N2 + Na+ which I know has a 1:1 ratio, How do I figure out the Moles of N2 gas expected. Molar volume = 24.627 L/mol Moles of N2 produced = .0067 mol Volume of N2 gas of STP = .165 L Original used

17. ## Math

Julie and Eric row their boat (at a constant speed) 21 miles downstream for 3 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 7 hours. Find the rate of the current.

18. ## chemistry

how would I draw the expanded formula for isopropylcyclopropane?

19. ## Physics...help!

A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.30. Its velocity at point A is 7.6 m/s and at point B is 4.0 m/s. Use the impulse-momentum theorem to find how long (in s) the sled takes to travel from A to B.

20. ## science

if the radius of a metal hoop that surrounds a silo were to expand by 1.00 m, the circumference of the hoop would increase by 6.28 m. If a metal hoop that completely surrounds the earth were to thermally expand so that its radius increased by 1.00m , by

21. ## chemistry

The vapor pressure of water at 80 degrees c is 355mmHg. A 100cm3 vessel contained wateraturated oxygen at 80 degrees c., the total gas pressure being 760 mmHg. The contents of the vessel were transferred by pumping to a 50cm3 vessel at the same

22. ## math

farmer montague raises chicken and goats. she is not sure how many she of each animal. but she does know she has 22 animals all together. She also know that all together,her animals have 56feet. How many of each type animall does farmer montague have?

23. ## Chemistry

A student made a determination of the empirical formula ot tungsten oxide (WO) produced by the total ignition of air of a smaple of metallic Tungsten. From the lab: Weight of crucible 11.120g weight of tungsten 8.820 weight of crucible and product (WO)

24. ## Chemistry

Show, with equations, why the solution from which BaSO4 is precipitated cannot be allowed to be more than 0.01-0.05M in HCl.

25. ## Accounting

Could someone please look this over and tell me if I have this correct? I am not confident in the Trial Balance. May 1 Cash 101 25,000 Common Stock 311 25,000 3 Supplies 126 2,500 Accounts Payable 201 2,500 7 Rent Expense 729 900 Cash 101 900 11 Accounts

26. ## Chem 101 calorimeter

Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter (2 nested styrofoam cups) to the maximum temperature. PS don't say it makes no sense because its obviously a real question

27. ## science

which abiotic factor separates marine ecosystems from river ecosystem? A)sunlight B)salt C)sand D)algae

28. ## science

A pig eats nuts,berries,fungi and insects.What type of consumer is a pig A)producer B)consumer C)omnivore D)decomposer

What is an expanded algorithm? Son doesn't know and didn't bring home his textbook, any ideas?

30. ## General Chemistry

How do I calculate the concentration of KmNO4 when.. Initial Volume is 50mL 0.11g sodium oxalate Volume of KMnO4 used to titrate oxalate and acid= 34.0 mL Volume of KMnO4 used to titrate acid only= 0.10 mL Please help me Thank you!

31. ## Biology 110

Name the 4 functions of the respiratory system. 1. 2. 3. 4.

32. ## math

Writing to Explain If you know that 7 x 8 =56, how can you use the Commutative Property of Multiplication to find the product of 8 x 7?

33. ## Chemistry

Suppose that a 0.6123-g unknown chloride-containing sample was dissolved, and and AgCl precipitated by adding a AgNO3 solution. The precipitate was filtered, ignited, and found to weigh 0.3324 g. What was the percent chloride in the unknown?

34. ## statistics

1. The on-campus housing costs for a semester at a state university are Normally distributed with a mean of $1553 and a standard deviation of$329. (a) What is the distribution of the mean on-campus housing cost for a semester at this university for a

35. ## chemistry

How many grams of NH4Cl must be added to 0.490 L of 1.70 M NH3 solution to yield a buffer solution with a pH of 9.40? Assume no volume change. Kb for NH3 = 1.8 10-5.

36. ## Chemistry

At 60 celsius the value of Kw is 9.5x10^-14. considering this waht is the calculated value for the pOH of a 2.00x10^-3 M HCL solution at this temperature? the answer is 10.32 i do the -log and i get 11.31 please advice

37. ## Physics

Use conservation of energy to determine the angular speed of the spool shown in Figure P8.36 after the 3.00 kg bucket has fallen 3.20 m, starting from rest. The light string attached to the bucket is wrapped around the spool and does not slip as it

38. ## Science

Reggie has a sample of raw sugar made up of large particles and a sample of white sugar made up of much smaller particles. He dissolved 1 tsp. of each sample in 1 cup of water. Which dissolved fastest? a) Both dissolved at the same rate b) The white sugar

39. ## physics

Find the net torque (magnitude and direction) produced by the forces F1 (F1 = 17.3 N) and F2 (F2 = 26.1 N) about the rotational axis shown in the drawing. The forces are acting on a thin rigid rod, and the axis is perpendicular to the page. (x = 0.323 m, y

40. ## Science

Four students each added salt crystals to water and measured the time it took for all the crystals to disolve. The following table shows their results. A three-column table, with column headers 'Student, 'Temperature (°C), 'and 'Time (sec).' For Marcus,

41. ## physics

Potential energy and kinetic energy are forms of what kind of energy? 1. mechanical 2. nuclear 3. heat 4. electromagnetic 5. chemical

42. ## Science

which of these two methyl orange and phenolphthalein gives more reliable and consistent results in the titration of H3PO4 with NaOH

43. ## math

write .98 as a fraction of a dollar in simplest form

44. ## interpret ELA

"I'm thirty five years old; I been married eleven years and i got a boy who sleeps in the living room-and all i got to give him is stories about how rich white people live" INTERPRET THIS STATEMENT

45. ## biology

Name 4 functions of the respiratory system.

46. ## physics

A moving car has kinetic energy. If it speeds up until it is going four times faster than before, how much kinetic energy does it have in comparison? 1. The mass is needed. 2. The same 3. Sixteen times larger 4. Four times smaller 5. Four times larger 6.

47. ## Science

It’s OK to say that your brain is solar powered, because A) mitochondria in plant cells convert solar power to the chemical power that is used to run your brain. B) cellular respiration is powered by sunlight. C) the antenna complex in chloroplasts acts

48. ## physics

A parachutist with a camera, both descending at a speed of 13 m/s, releases the camera at an altitude of 57.8 m. What is the magitude of the velocity of the camera just before it hits the ground? The acceleration of gravity is 9.8 m/s 2 and air friction is

49. ## Physics

Consider a frictionless track as shown in the figure below. A block of mass m1 = 5.75 kg is released from A. It makes a head on elastic collision at B with a block of mass m2 = 8.00 kg that is initially at rest. Calculate the maximum height to which m1

50. ## Everst

Suppose you are a stock market analyst specializing in the stocks of theme parks, and you are examining Disneyland’s stock. The Wall Street Journal reports that tourism has slowed down in the United States. At Six Flags Magic Mountain in Valencia,

51. ## Physics

A rock of mass m = 1.8 kg is tied to a string of length L = 2.4 m and is twirled in a vertical circle as shown in the figure below. The speed v of the rock is constant; that is, it is the same at the top and the bottom of the circle. If the tension in the

52. ## Science

It’s OK to say that your brain is solar powered, because A) mitochondria in plant cells convert solar power to the chemical power that is used to run your brain. B) cellular respiration is powered by sunlight. C) the antenna complex in chloroplasts acts

53. ## Science

Is the answer D? Thank you The earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component would not have been useful at that time? A) chloroplast B) nucleus C) plasma membrane D) mitochondrion

54. ## physics

A 16 kg block slides down a frictionless slope which is at angle θ = 20◦. Starting from rest,the time to slide down is t = 1.88 s.The acceleration of gravity is 9.8 m/s2.

55. ## Physics

An airliner is at point A and is trying to fly to point B, which is 1000 km due North of point A. The pilot of the airliner wishes to reach point B in 2.5 hr. A wind is blowing from the Northwest (45 degrees) at 100 km/hr. In what direction and at what

56. ## physics

Find the net torque (magnitude and direction) produced by the forces F1 (F1 = 17.3 N) and F2 (F2 = 26.1 N) about the rotational axis shown in the drawing. The forces are acting on a thin rigid rod, and the axis is perpendicular to the page. (x = 0.323 m, y

57. ## Chemistry

Calculate the mass of sodium sulfate decahydrate need to make a 500ml solution that is .025m in sulfate anion?

58. ## Physics

A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball's velocity? A) up B) down C) horizontal I

59. ## physics

Four objects are held in position at the corners of a rectangle by light rods . m1 2.90(kg) m2 1.90(kg) m3 4.50(kg) m41.90 (kg) (a) Find the moment of inertia of the system about the x-axis. Answer in kg · m2 (b) Find the moment of inertia of the system

1. Choose a real or made up example of a company, and describe at least three variable costs the company has

61. ## Physics

A place kicker must kick a football from a point 37.1 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 19.8 m/s at an angle of 53° to the horizontal. (a)

62. ## math

mr jacob is 55 years old and tony is 7 years old. in how many years will mr. jacob be 4 times as old as tony?

63. ## CHEMISTRY

If the OH ion concentration in an aqueous solution at 25 celsius is 3.4x10^-3 M the the H concentration in moles per liter in the same solution is? answers is 2.9x10^-12 i do the -log and i get 2.46 i don't know that else

64. ## physics

A ball rolls off of a table with a speed of 2 m/s. The table is 1.2 m high. How long will it take to the ball to hit the ground?

65. ## Pre-Algebra

A movie projector is 6 ft away from the screen showing a rectangular picture that is 3 ft wide and 2 ft high. A. Suppose the projector is moved to 12 ft from the screen. What size will the picture be (width, height, and area)? I figured 6 wide, 4 high, 24

66. ## Physics

Problem 17.6 A helium-neon laser beam has a wavelength in air of 633nm . It takes 1.48 ns for the light to travel through 31.0 cm of an unknown liquid. Part A - What is the wavelength of the laser beam in the liquid? Express your answer with the

67. ## Biology

What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?

68. ## Hardware

Choose a commonly used microprocessor, Intel Core or IBM Power6. What data types are supported? How many bits are used to store each data type? How is each data type represented internally?

69. ## Maths

Calculate the volume and curved surface area of a cone 14cm in base diameter and 24cm high

70. ## Math

Am having trouble figuring out how to work this problem. We are currently studying about least common multiples. The problem is: Stacey jogs every third day and swims every fourth day. If she is jogging on Monday, what day of the week will she end up

71. ## Chemistry

what is the mass of product that can be prepared from 1.00g of zinc metal?

72. ## Physics

Problem 17.6 A helium-neon laser beam has a wavelength in air of 633nm . It takes 1.48 ns for the light to travel through 31.0 cm of an unknown liquid. Part A - What is the wavelength of the laser beam in the liquid? Express your answer with the

73. ## Chemistry

4.00 g dm^-3 of impure sodium carbonate is used in a titration. What could have caused the impurity in the sodium carbonate?

You are writing to a reader who favors a different solution than the one you recommend. Which of the following is MOST likely to persuade the reader? A. Describe your reader's solution first, explain why it won't work, and then go on to describe your own

75. ## Physical Science Concepts

Atutomobile l-collecg stations a thin metal wire sticks up from the road and makes contract with cars before they reach the toil collector. What is the pupose of this wire?

76. ## Physical Science Concepts

1) the industrial revolution occurred at about the same time as the growth of the theory of electromagnetism. a)What were some of the causes of the industrial revolution? b)What technology and industry can be assciated with the emergence of the

77. ## Science

Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from? A) Special metabolic pathways exist just for the production of heat. B) Mitochondria produce heat in the form of ATP. C) Plants store up

78. ## skylin

Two 75.0-kg hockey players skating at 5.75 m/s collide and stick together. If the angle between their initial directions was 135°, what is their speed after the collision? (Let the motion of player 1 be in the positive x-direction and the motion of player

79. ## physics

A 4.36 × 10−5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 88.1 m, what is the work done by gravity? The acceleration of gravity is 9.8 m/s2 . Answer in units of J

80. ## Chemistry

Decomposition reaction: CH2=CH2(g)---> CH4(g) + C (Graphite) If the decomposition begins at 10c and 40.0 atm with a gas density of .215 g/ml and the temp increases by 950K. (a) what is the final temperature of the confined gas (ignore volume of graphite

81. ## math

if the ratio of rose bushes to trees in the yard is 3 to 1. Which of these shows possible numbers of roses to trees in the yard.

82. ## math

Tony is making flower arrangements. He is using 3 different kinds of flowers--roses, daisies, and tulips. Each arrangement will have the same number of each kind of flower. He figures that if he uses all the flowers, the greatest number of arrangements he

94. ## Psychology

The research of Solomon Asch revealed that: a.participants in the study conformed to the erroneous group response in one-half of the trails. b.all participants in the study conformed to the erroneous group response in each trail. c.participants in the

95. ## Science

A golf ball is hit at ground level. The ball is observed to reach its maximum height above ground level 2.2 s after being hit. 1.3 s after reaching this maximum height, the ball is observed to barely clear a fence that is 780 ft from where it was hit. The

96. ## Physics

12. A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball's acceleration? A) up B) down C)

97. ## Physics

A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 7.0 m/s at the end of 7.0 s. At that instant, the kinetic energy of the system is 60 J and each mass has moved a distance of 24.5 m. Determine the

98. ## Ratios - measurements

I need to find the ratio of the longest side to the length of the shortest side, then write each fraction in lowest terms. Both questions have more than 3 measurements: 1) 25 km to 24.5 km to 5 km 2) 6 3/4 ft. to 5 3/4 ft. to 3 1/4 ft. to 1 3/4 ft to 1 1/2

99. ## science

The reaction 2SO + O2 ¨ 2SO3 is exothermic. (a) How will a rise in temperature affect the yield of SO3 in an equilibrium mixture of the three gases? (b) Will an increase in pressure raise or lower the yield? (c) In what possible way can the speed of the

100. ## math

peter took a 1,500 mile trip in 5 days. each day, he drove 30 miles more than the day before. how many miles did he cover on the first day?

101. ## physic

A 1.20-{\rm kg} block of wood sits at the edge of a table, 0.720 m above the floor. A 1.20×10−2-{\rm kg} bullet moving horizontally with a speed of 750 m/s embeds itself within the block

102. ## literary

I tried to re-write the essay please check it for me again . Thank you Sra Antigone and Whale Rider In the play Antigone by Sophocles and movie whale rider directed by Caro. The two characters are Paikea and Antigone both has similarities in common. Both

103. ## math

i need the answer to this mathamatical question (3x6)+12/2-8

104. ## physics

A beautiful man with a large nose named Melvin lifts a 28.1 kg bucket from a well anddoes 4.24 kJ of work. The acceleration of gravity is 9.8 m/s2 . How deep is the well? Answer in units of m

105. ## Phyisics

A 2kg hallow sphere of a radius 6cm starts from rest and rolls without slipping down a 10 degree incline. if the length of the incline is 50cm then the velocity of the center of mass of the hallow sphere at the bottom of the incline is?

Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved. Stirring - Time (sec) No stirring - 25 Slow stirring - 18 Medium stirring - 10 Fast

107. ## physics

A hollow rubber ball with a diameter of 5.57 cm and a mass of 38.9 g is cut in half to make a boat (in a bathtub) for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be

108. ## Int. Algebra

The spread of oil leaking from a tanker after t hours is in the shape of a circle with radius r(t) = 200 square root t+3, - 600 (in feet). A. Find the time it takes for the leak to spread at a radius of 1800ft. B. Find the area A of the oil leak as a

111. ## Physics

When U238 decays into Pb206 via alpha and beta decay, what are the byproducts of the decay? A) 8 alpha particles and 6 beta rays. B) 8 alpha particles, 6 electrons, 6 neutrinos, and energy. MY ANSWER . C) 16 alpha particles, 16 beta rays, and energy. D) 16

112. ## math

Explain how to get the variable alone in each equation..x + 13 = 25 x + 13 - 13 = 25 - 13

113. ## chemistry

how long would it take a radio wave with a frequency of 7.25 x 10to the 5th to travel from Mars to earth if the distance is approx. 8.0 x 10 to the 7th?

114. ## pre cal

how do you solve f(x)= G(X) and find the points of intersection of the graphs of the 2 functions f(x)= x^2 + 5x+ 13 g(x)= 19

115. ## Physics

An airliner is at point A and is trying to fly to point B, which is 1000 km due North of point A. The pilot of the airliner wishes to reach point B in 2.5 hr. A wind is blowing from the Northwest (45 degrees) at 100 km/hr. In what direction and at what

Write an equation for the linear function f with the given values. f(4)=-8, f(-3)=1

117. ## English

Can someone edit this essay? Topic is "if given funding for a small engineering project, what would you do?" 250 word limit Millions of Americans purchase bottled water everyday simply because they don't like the taste of their own tap water. While most

118. ## physics

A 4.36 × 10−5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 88.1 m, what is the work done by gravity? The acceleration of gravity is 9.8 m/s2 . Answer in units of J What is

119. ## umt

2. A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.1 m). The charges on the circle are -4.0 µC at the position due north and +5.0 µC at the position due east. What is

120. ## physics

you could produce a sample containing 2,400,000 free neutrons, what would it be 2658 seconds later? A) 300,000 neutrons, 2,100,000 protons, and 2,100,000 electrons. MY ANSWER B) 300,000 neutrons and 2,100,000 protons C) 300,000 neutrons, 2,100,000 protons,

121. ## science

How many joules are taken in by a man who eats 4000 calories of food each day? What is this person's average thermal power output? 4000 x 4.186 =16 744Joules, but I don't understend second question, Thank you for helping me.

122. ## English

Thank you. I have a few doubts on a summary I made. 1)A set of apparel items is the same as a set of clothing items? 2) She caused something of a scandal by (for is wrong?) having love affairs with wealthy men. 3) Versace used to give only an ambiguous

132. ## social studies

How did Capitalism change during the Industrial Revolution?

133. ## physics

Note: Coal and oil are non-renewable re- sources. A friend says the energy of oil and coal is actually a form of solar energy. Is your friend correct, or mistaken? 1.Mistaken; the energy is actually nuclear. 2. Correct; these materials are the result of

134. ## Psychology

Teenage mothers who are accustomed to existing on hamburgers, French fries, and cokes need to consider the nutritional needs of the child. Research has shown that a poor diet can: a. restrict the development of eye and hair color. b. produce prenatal

135. ## Economics

assume that gross national debt is equal to $3million and the federal government then runs a deficit of$300 billion. What is the new level of gross national debt

136. ## maths

write each of the following as trigonometric ratios of acute angles. (a)sin160 degrees (b)cos 310 degrees (c)tan 200 degrees

137. ## Calculus

I know I posted this problem earlier but I don't think it will be seen anymore since it's almost at the end of the page: Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density

138. ## physics

Add the following vectors 1.50m{North 45 degrees West}, 10m{South30degreesEast}, 25Meters[South60mWest] pls help. explain to me how to solve it

139. ## chemistry

what is the geometry around the carbon in dichloromethane?

140. ## physics

What is the acceleration for the turtle moving with constant velocity of 5m/s to tghe right

141. ## Language

Can someone help me with the following analogy? colloquy:loquacious a)somnambulism:ambulatory b)plateau:flat c)octahedron:eight d)toponym:noun

142. ## ENGLISH HW CHECK

Choose the correct answer for the ALL CAP word 1. My father always COMPLAINS that my sister's boyfriend is lazy. Answer a. complains b. complain c. complained d. complaining 2. Uncle Frisbee, who BE as bald as a grapefruit, buys every new hair-growing

143. ## Chemistry

Why would the percent recovery obtained over 100% in a an experiment dealing with the cyclic chemical reactions of copper?

144. ## Chemistry

Our class did an expeiment of adding sodium carbonate and calcium chloride. The experiment only yielded 28% of the calculated yield. The class did the experiment as a group (there are only 4 students in our class) and the experiment was closely supervised

145. ## physics

A ball of radius 0.2m rolls along a horizontal table top with a constant linear speed of 3.04 m/s. The ball rolls off the edge and falls a vertical distance of 2.02m before hitting the floor. What is the angular displacement of the ball while it is in the

146. ## Calculus

Find the point on the line 3 x + y - 5 =0 which is closest to the point ( -3, -3 ).

147. ## chemistry

upper atmosphere chloromethane can be decomposed by light according to the reaction:CH3Cl -> CH3(g) + Cl(g)The energy required for this reaction is 428 kJ mol–1. If each molecule of chloromethane is decomposed by one photon, what is the maximum

should companies involve their marketing channels in the desighnof their promotional programs? what ar the advantages and disadvantages of doing so?

149. ## Calculus

Find the value of the derivative at each indicated extremum.

150. ## Physics

A diver in Acapulco jumps off a 150 ft cliff. His forward motion is 10 feet per second. The base of the cliff at the waters edge extends 38 feet beyound the top edge of the cliff. Will the diver land in the water?

151. ## maths

find the general solution of the following first order differential equation. dx/d(theta)=(xtan(theta))-(cos(theta))

152. ## Geometry

answer to a two column proof problem such as Given: angle 1 and angle 5 are congruent and angle 5 is congruent to angle 4 prove angle 3 is comgruent to angle 1

153. ## Psychology

It may be difficult to sooth a crying baby who needs to be fed and changed with Cuddling and toys. The strength of the physical needs in this situation support: a.secondary drive approach theory b.the incentive approach to motivation c.Maslow’s hierarch

154. ## CHEMISTRY

at 1500 celcius the system 2NON2+O2 was allowed to come to equilibrium. the equilibrium concentrations were NO=0.00035M N2=0.040M O2=0.040M What is the value of Kc for the system at this temperature? The answer they give is 1.3 x10^4 Im getting 2.2 x10^-1

155. ## math

set S contains all integers from 100 to 200, inclusive. if x is a number in S that is multiple of both 6 and 10, what is one possible value of x?

156. ## French

I am posting just the CORRECTIONS! Can the corrections be put immediately after the error as you said, thanks. When you use (...) and etc do you mean the rest of the sentence is right? Could you please give an example of where a semi-colon could be used in

157. ## Chemistry

For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass

158. ## Math

Tile Pattern... A design starts with 1 tile and it continues to grow the next day to 4 tiles and on the third day there is 13 tiles. How many tiles will there be on the 10th day? How many tiles on the 50th day? Find a formula for any number?

159. ## french

thank you so much for taking so much time into helping me perfect my french essay I have done the corrections you have told me to do and I was wondering if you could go through and make sure the lanuage and grammar are all perfect. And thank you I really

160. ## calculus

what is the maximum distance between f and g when f(x)=1/2x^2 and g(x)=1/16x^4-1/2x^2 on closed interval [0,4]

161. ## Statisitcs

Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends

162. ## math

with a mean of 515 and a standard deviation of 135, what percentage score 110-515 using the 68-95-99.7 rule

163. ## physics

My question is what would be the constant in a basketball ofensive rebound experiment? My science q is do the amount of offensive rebounds decide whether or not a basketball will win or loose the game? can you help/

164. ## physics

a force of 20n applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4.kg move on the table caculate thd coefficient of friction between the block and the table

165. ## law office management

when one person has the power and authority to make all decisions for the firm it is known as an _______ type of management. a. management by committee b. autocratic c. management by stakeholders d. executive committee im confused between A and D

166. ## bio

what will happen to a red blood cell place in a solution of 99.3% water and 0.7% salt?

167. ## Physics - Energy

Two comets, each of mass 6500 kg and traveling 88 m/s in opposite directions, collide head-on and come to rest. How much energy is produced in this collision? Thank you!

168. ## Algebra

The average cost per drink can be found by dividing the total cost (.25x+250=total cost) by the number of drinks sold (x). Write an equation that shows the average cost per drink.

169. ## Statistics

Assume you want to estimate with the proportion of students who commute less than 5 miles to work within 2%, what sample size would you need?

171. ## real estate law

Attorneys are required by state law to be: a. at least 26 years of age b. licensed c. living within 100 miles of the courthouse d. sworn to secrecy is it B

172. ## Physics

A 8800 kg railroad car is rolling at 2.4 m/s when a 3100 kg load of gravel is suddenly dropped in. What is the car's speed (in m/s) just after the gravel is loaded? how do I relate these, I am confused.

173. ## physics

An open-topped tank completely filled with water has a release valve near its bottom. The valve is 1.63 m below the water surface. Water is released from the valve to power a turbine, which generates electricity. The area of the top of the tank, AT, is a =

174. ## ART

I need some help determining the elements and principles of an art piece called "Polly, Minou and Eon" by Will Barnet

175. ## physics

an 85 mass has an acceleration of 5.5 m/s2 what is the net force applied

176. ## French

thank you so much for taking so much time into helping me have a perfect french essay! I have done the corrections you have told me to do. If i have left something out please state. Could you please go through the essay and make sure the lanuage, grammar

177. ## Biology

In guinea pigs, gene B is for black, b is for white the heterozygote is a mixture, called agouti. ( sex linked and non dominant) , a litter consists of 5 agouti females and 6 black males , if the parents of this litter had more offspring , what other

178. ## Statistics

Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 30 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends

179. ## Chemistry

Hi, This may sound like a dumb question but I am stuck. I have worked out everything from a titration and I am now trying to work out my overall % purity. It is 86.0% +/- 1.3% What will 86.0% + 1.3% be and what will 86.0% - 1.3% be?

180. ## physics!

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

181. ## algebra

formula= P(x)=.1x^2+50x-300 where x is number sold what is ans. if P(100)=.1(100)^2+50(50)-300

182. ## Calc

How do you do the derivative of an inverse trig function? arcsin (sqrt2/2)??

183. ## chemistry

a 0.296g of CO2 has a volume of 565ml and a pressure of 425mmHG, what is the temperature??????

184. ## math

matt rides his bike between 19 and 22 blocks each day. what would be a reasonable estimate of how much he rides in a week.

185. ## math

If a quarter circle is placed on a square target and the radius of the quarter circle is the same as the length of a side of the square, what is the probability that a dart that hits the square does not hit the quarter circle

186. ## Math algebra

how do you do this by using the FOIL method? 1. 3x^2 + 22x + 7= 2. 2x^2 + 5x - 12= 3. x^2 - 11x + 28= thank you!

187. ## statistics

Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends

188. ## Physical Science

What becomes of the electric energy provided in electrolysis? In what device is this energy transformation reversed?

189. ## Science (urgent)

Hi I really need to know this I've asked a couple times but haven't gotten an answer yet. In the reaction X + Y ® Z, Z is the A) substrate. B) product. C) enzyme. D) carbon molecule.

190. ## Physics

A steel ball is luanched on a table to be 4.0 m/s. If the tabletop is 1.5m tall then where should you place a 20cm tall can to catch the ball where it lands?

191. ## Biology

My teacher asked me this question and I do not know the answer would you be able to tell me and why thank you large bodies loose a smaller percentage of heat to their surroundings than smaller bodies. Why?

A 13.2 gm bullet is fired into a 12.0 kg wood block that is at rest on a wood table. The block, with the embedded bullet, slides 5.00 cm across the table. Assuming that the local acceleration due to gravity is 9.80m/s2 and that the coefficient of kinetic

193. ## trig

Find another angle theta between 0 and 2pi that has the same cosine as 3pi/14

4w-9(6-5w)=44;w=3 decide whether the given value is a solution of the equation if not find the solution

195. ## computer sciece

#include #include int main() { int num[100]={0}; int i,n=0; for(i=0; num[i] != EOF ; i++,n++) { scanf("%d",&num[i]); } printf("%d\n", i); while(i=0;i

196. ## Biology 110

Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?

197. ## AP US History

Compare and Contrast the effectiveness of Washington's and Adams' presidencies in obeying and promoting the Constitution during their administrations. So far I have: The main compromises made when writing and ratifying the Constitution were the

198. ## geometry

A rectangular playing field is 3 times as long as it is wide. its area is 2500 metres squared. find the cost of fencing in the field if the fencing costs €15 per metre

199. ## physics

A 1.2 kg ball is rolling down a friction free ramp at 21 m/s just before it hits level ground. How high was the ball when it started rolling?

200. ## physics!

how much work is done by each force acting on vacuum cleaner as it is pulled horizontally 3 m at a constant speed by a force of 50 N at an angle of 30degrees above the horizontal?

201. ## chemistry

Calculate the normal freezing point of an aqueous solution containing 30% w/w ethylene glycol. Thanks

202. ## math

If you walk 6.2 miles in 2 hours- what is your average speed in meters per minutes? I just want to make sure that I am setting this up right... thank you.

203. ## math

If line l in the x-y plane contains the point (-2,1),(4,5) and (5,t), what is the value of t?

204. ## calculus

Find all values of a such that y=a/(x−9) and y=x^2−18x+81 intersect at right angles? please how the steps :)

205. ## math

Bill buys x items at $3 each, y items at$5 each, and z items at 6 each. If x,y,and z are each multiple of 5 and the total price of the items costing $3 and$5 is 55, which of the following could be the total price of all x +y+z items?

206. ## pre cal

how do you solve f(x)= G(X) and find the points of intersection of the graphs of the 2 functions f(x)= x^2 + 5x+ 13 g(x)= 19

207. ## philosophy

Truth tables can determine which of the following? (Points : 1) If an argument is valid If an argument is sound X If a sentence is valid All of the above

208. ## Mathematics

How do i post the answer hence i don't the answer .In geometry.an equalateral triangle has the length of it's sides given as (y + 3)cm, (2y - x)cm and (4x + 3). Find the (a) value of x and y, (b) perimeter of the triangle (c) altitude of the triangle to

209. ## spanish

How do you respond to necesitas la tienda y el saco de dormir in spanish

210. ## Math1239

x=4 cost, y= 2 sint on the interval 0 ≤ t ≤ 2π what is the Cartesian equation? nd describe the graph giving the (x,y) co-ordinates ... stating the initial point and the terminal point. ? i found the cartesian equation as y= square root of 4-x^2/4 plz

211. ## English

Could you please check this sentence I need to include in a letter? 1) Thank you very much for your last e-mail. Unfortunately, I couldn't read the document attached to it. 2) Actually, it was blank. Can you post (send) it to me again (once more, another

212. ## Statistics

One sample of n=20 scores has a mean of M=50. A second sample of n=5 scores has a mean of Mean=10. If the two samples are combined, what is the mean

213. ## Just really need some help

Acela’s aging parents own a house and a car. Acela is currently living in the house with her parents. Her brother and sister are married and live elsewhere. Why is it important for Acela’s parents to have wills? What are some possible consequences of

214. ## English

Can someone edit this essay? High school is a menacing, over-bearing world that hardly gives the average student to even stop and think. With the threat of a possible test or project coming up, combined with constant homework, it's easy to forget you're

215. ## physics

A 1.2 kg ball is rolling down a friction free ramp at 21 m/s just before it hits level ground. How high was the ball when it started rolling?

216. ## English

I mispelt a word in my previous post. Thank you. 1) This can be a drawback not so much to the wearer but as to those around him. 2) Who is a "mill master"? 3) During the day of Peterloo, which alludes to the Battle of Waterloo, a man had his nose cut from

217. ## Science

what is true about the number of moles of hydroxide ions and moles of hydrogen ions at the equivalence point? How can you find the moles of hydroxide ions at the equivalence point?

218. ## Did i do this right??? STATS

3. In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

219. ## mathematics

find the general solution of the following first order differential equation. u(t): du/dt =(u/(t+2t)) pls show all working

220. ## french

My homework task is to write an introductory email to my french exchange partener about:yourself, how you get on with your family, what your views on marriage are, a descrition of your best friend(s), what you did yesterday and what your plans for the

221. ## Math

In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

222. ## English

I'm terribly sorry. I included that sentence again by mistake. Thank you very much for your corrections!

223. ## criminal law

typically the chronological, ______ of a child is used to determine criminal responsibility rather than mental capacity. a. age b. well being c. health d. sanity im confused between A and D

How can the right equation be converted into the answer on the left? (sec^4x)(tan^2x)=(tan^2x + tan^4x)sec^2x

225. ## dictation

could you please hold the door open for me?

226. ## MATH

FACTOR COMPLETELY c^3 + 8

227. ## curriculum development project

Im still waiting on some help with the 10 domains and the activity plans in a thematic web

228. ## math

Which of the following can be the average(arithmetic mean ) of four consecutive positive even integers?

230. ## chemistry

is this correct? making sure I did this right CH3CH2CH2CH2-Br ans: 1-bromobutane

231. ## Chemistry

If you need any extra information please ask How could someone have calculated the dilution of the HCL from 20.0 cm^3 to 250 cm^3?

232. ## physics

Tigger likes to play golf. For this particular shot, the distance between the spine and the clubhead (aka the distance of the golfclub + arm) is 1.6 m. When the clubhead hits the ball, it is travelling at 50 m/s. How fast is the body and the club rotating?

233. ## English

Could you please check these few sentences for me, please? Thanks 1) He is ambitious and thirsty for power. He turns into a murderous tyrant as a result of his ambition. 2) A vote was taken (do you know a synonym) in the late afternoon. On July 4 (on July

234. ## Chemistry

if you have 100mL of 0.1M acetic acid (ka = 1.8x10(-5)what is the pH after 10mL NaOH is added? I came up with an answer of 2.895, but i'm not sure if its right.

235. ## math

john and mary are working on a job together. if john does it alone, it will take him seven days, while mary can do it alone in five days. how long will it take them to do it together?

236. ## MATH

Find LCM t^3+8t^2+16,t^2-8t

237. ## philosophy

P v Q" is best interpreted as P or Q but not both P and Q X P or Q or both P and Q Not both P or Q P if and only if Q

238. ## Bio 110

Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?

239. ## Bio 110

Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?

240. ## Math

solve 6/y+4=5/y-4

241. ## English language

English is not my first language and someone just told me: 'my mom was asking about you', what does it mean and what people usually reply to that sort of statement? Thanks

242. ## Algebra

If 250 specialty coffee drinks were sold at the bake sale, what would the average cost per drink be given the equation .25x+250/x?

243. ## chemistry

calculate the molarities of each of the ions in a solution prepared by diluting 78mL of 4.5M Ca(ClO3)2 (aq) to 156mL with water. I don't understand how to answer this question.

244. ## Calculus

What is the derivative of -3x((x+1)^1/2)

245. ## Chem(PLEASE CAN SOMEONE EXPLAIN HOW I CAN SOLVE)

calculate the molarities of each of the ions in a solution prepared by diluting 78mL of 4.5M Ca(ClO3)2 (aq) to 156mL with water. I don't understand how to answer this question.

246. ## Reimbursement Methodologies

You work in the hospital information Management, part of my job to assist medical resident with completing the record documentation.

Would someone please be kind enough to check the answers for these problems?Last round for tonight. Thank you. 1. 3/16 - 1/8 = 1/16 2. 151/4 -11 5/8 = 3 5/8 3. 2 x 3/7 = 6/7 4. 1/2 x 7/8 = 7/16 5. 1 3/8 2 1/2 = 3/7/16 6. 1/2 divided by 2/3 = 3/4 7. 8 1/4

248. ## Math

Jen & Jakie are 33miles apart on a calm lake paddling toward each other. Jen paddles at 4miles per hours, while Jakie paddles at 7miles per hour. How long will it take them to meet?

249. ## U.S. History

The student will describe the causes events and results of the French Indian war. The student will explain the economic relationship between the colonists and Britian. :( :( :( :( :( :( :( :( :( :( Can anyone help me? And, please don't tell me to go to

asked by John Jacob Jingle Heimer Smith
250. ## criminal law

the law will not punish an ______ act a. ignorant b. reckless c. involuntary d. premeditated i think its C

251. ## chemistry

what is the volume in liters of 3.0 moles CH4, at 26C and 1.48atm?

252. ## criminal law

conspiracy is an ______ crime a. accessory after the fact b. general intent c. specific intent d. structure is it B

253. ## French

Hi Sra, Concerning the French text I don't know how to rewrite the text with all the corrections and English I want to say without it being confusing, could you please suggest a way?

254. ## Psychology

disadvantage of group intelligence tests include that a. all test taker must wait until all registered individuals arrive b. proctors are often inconsistent and allow some test takers a longer time to respond or to take testing breaks c. some test taker

255. ## Language

I have one more question. I think the author of this book made a mistake on the next analogy. Take a look and see if you agree. Platyhelminthes:platypus a)plateau:platitude b)worm:marsupial c)mammal:science d)crystalline:canine I think the author

256. ## English check my answer

Complete the following sentence with the best possible answer. 1. Abraham Lincoln warned us that "America will never be destroyed from the outside. If we falter and lose our freedoms, it a. will be because we destroyed ourselves." b. be because we

257. ## Math Algebra 1

X | Y 1 | 1 2 | 3 3 | 6 4 | 10 7 | 28 8 | 55 n | ? Find expression that works for all steps using the variable x!?

258. ## social studies jumble

what is levaygloerf unscrambled?

259. ## Math

How high will a baseball that is thrown up into the air at 48 feet per second go if it starts its flight at a height 10 feet above the ground?

260. ## organic chemistry

How do I go from C-triple bond-C and end up with [(Z)-6 methylhept-2-enyl] benzene. I think the first step is adding NaNH3, but after that I'm lost.

261. ## physics

Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 4843 kg), which is made of steel (ρ = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong

262. ## english

Im writing a argument essay about PETA and I cant seem to come up with a thesis…..I need help plz.

263. ## socialstudies

2.) "Without our two great political parties cutting across economic and geographic interests, democracy as we know it could never have been made to function." The author of this statement probably meant to suggest that

264. ## Biology

Suppose that a clolur blind man has parents with normal vision. Would all his sons be colour-blind ? Was his mother a carrier ? would all his daughters be carriers

265. ## just a question

Geraldo works full-time to take care of his family. His wife, Marina, stays home to take care of their two young children. What kind of insurance coverage should Geraldo and Marina have for their family? Explain why.

266. ## English

Could anyone suggest a food that could go in Room 101. Room 101 is a room where you put all the foods you hate. I have been assigned to write a persuasive text on why i want this food to be put in room 101 and why. Kindly suggest a food that people

267. ## science

differentiate between helpful and harmful bacteria

268. ## MAthe

Simplify by removing Factor of 1 3v-9/3-v

269. ## MATH

Divide and Simplify y^2-16/y divide y-4/y+1

270. ## punctuation

Please show me the correct way to punctuate the following or did I do it correctly: You can't pull my strings. I'm breaking away starting today.

271. ## Statistics

I am not sure if I can compare the measurments fro the above study with the standard normal distribution. I feel like I do not have enough data. Am I right or is it the standard normal distribution ? Medication at the end of life During the last month of

272. ## Language Arts

Please explain the power of language

273. ## organic chemistry

what would be the result if we heated a mixture of dicholoromethane and naphalene to 60 degrees celcius, collected distillate until no further material is distilled, and then cooled the flask back to room temperature?

274. ## Chemistry

give a formula you can use to calculate the number of moles of H+ ions used at the equivalence point.

275. ## math

A manager schedules employees to cover evening shifts. There are 9 shifts on Monday, 11 on Tuesday, 13 on Wednesday, 13 on Thursday, 15 on Friday, 16 on Saturday, and 12 on Sunday. If each employee can work an average of 4.5 shifts, how many employees

276. ## Social Studies

In what building does the President of the United States serve?

277. ## maths

find the general solution of the following first order differential equation. t*(dy/dt) = (-y/t) + ((exp(1/t)/t^3) could you show steps in working to solution.

278. ## physics

if a=Ω² times r with what is equal the Ω?

279. ## mat

The functions f and g for x lesser or equal -4, but x greater or equal 6. and g(x)=|f(x)|, what could be the value if f(-3)?

280. ## math

set S contains all integers from 100 to 200. if x is a number in S that is multiple of both 6 and 10, what is one possible value of x?

281. ## social studies

Philip 2 of Spain called the Englishmen who attacked and raided his ships _______ ______.

282. ## biology

Name the 4 factors that control the amount and rate of gas exchange.

283. ## biology

Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?

284. ## MATH 101

How do you solve system of equation problem. example x+3y=32 -3x+2y+3 and x+y=6 x-y=-9

285. ## biology

Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?

286. ## English essay, could I have someone proofread it?

The title states it. Please be gentle. The day started off pretty normal, well, before I was out rocking out to music, besides the fact that we had all stayed in a house with nothing but an old Dean ‘’Z’’ guitar and an Xbox 360 system. We went to

287. ## Problem Solving Math

If a circuit has a 3.9k resistor and a 5F capacitor, find the current flow in the circuit at 0.005 seconds, if the maximum current flow in the circuit is 1.5mA.

288. ## Biology

In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances

342. ## MAth

Solve 2/wz^2+9/W^2z Help

343. ## Math

what does 4 - 6 equal?

344. ## human services

how success wisconsin human services in meeting the needs o its demographic group

345. ## cj

what is the sum of 756 and 249?

346. ## algebra

twenty times the cost of a record, increased by eighty-nine cents

347. ## math

how to factor x-d +(x-d)^2?

348. ## Natural science

What might happen to earth if the temperature in the atmosphere rises by 5degrees and if the water in the ocean gets colder?

349. ## nursing

bioterrorism and how might you prepare for its effects?