chemistry! URGENT

61,713 results, page 14
  1. Urgent math question help!!!

    Drag and drop the correct justifications into the boxes. 4(x−2)+1=9 : subtraction property of equality 4x−8+1=9 :combine like terms 4x−7=9 : distributive property 4x = 16 : associative property of equality x = 4 : division property of equality

    Alfonse cuts half a rectangular lawn, 50m by 20m, by mowing strips of equal width around the perimeter. Bart cuts the small rectangle in the middle that's left. How wide a strip does Alfonse cut so that they share the work equally?
  3. Science-URGENT please

    Does anyone have any suggestions for a lab that would test the effects of exercise on human physiology? I thought of a lab involving running and heart rate, but my other classmates came up with a similar idea and i would prefer to do something different.
  4. Chemistry(Urgent, please check)

    I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^-(aq) -> Fe(SCN)^2+(aq) I have to create 5 ICE tables because we
  5. Urgent math

    Two polynomials P and D are given. Use either synthetic or long division to divide P(x) by D(x), and express the quotient P(x)/D(x) in the form P(x) D(x) = Q(x) + R(x) D(x) . P(x) = 10x3 + x2 − 21x + 9, D(x) = 5x − 7 P(x) D(x) = 2x2+3x
  6. Quick Help (urgent)

    How do you know the information presented on the sites are accurate? healthunit . com teenwire . com sexualityandu . ca sexetc . org I don't know how to do this question. Truth is I "don't" know if the information is accurate. Please help, like give me an
  7. Physics 11 steve, bob,physics expert pls URGENT!!

    Coefficiant of friction between rubber tires and wet pavement is 0.50. brakes are applied to a 750kg car, intitally travelling at 30m/s and the car skids to a stop. What is the size and direction of the acceleration of the car.
  8. Urgent--Geometry(trig part)

    So I am new to sine, cosine, and tangent, so I need some help. Just explain it. No need for the answers unless you want to give it to me. :D Let triangle ABC be a right triangle with angleC=90degrees. Given the tangent of one of the complementary angles of

    Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers "c" that satisfy the conclusion of Rolle's Theorem. f(x)=sin4pix , [-1/2,1/2] Well according to Rolle's Theorem, it has to be continuous
  10. Physics Urgent please help

    A man of mass 70 kg is in free fall in the air. He reaches a terminal speed of about v_term = 54 m/s. (Note that v_term >> v_crit and we are in the pressure dominated regime where F_fric is directly propotional to v^2 ; we have g = 9.8 m/s ) What is
  11. calc Urgent please

    A boat heads 15 degrees west of north with a water speed of 3m/s. Determine its velocity relative to the ground when there is a 2m/s current from 40 degrees east of north. How long does it take to cross the river which is 800 m wide? Where does the boat
  12. english/usgov URGENT

    can you guys help me write a conclusion for this and also help me elaborate my essay better. I've worked so hard and it's due tomorrow Politicians can't agree on how to create more jobs and this is a major problem. The U.S. economy is in trouble because it
  13. Calc 2 Urgent Surface Area

    Find the area of the surface generated when y=4x and x=1 is revolved about the y-axis. We have to use the surface area formula.
  14. physics

    two planets of mass "m" and "M" respectively. Have centre to centre seperation of "R" . At what distance from the centre of the planet of mass "M" do the gravitational force of planets cancel each other??????? plz urgent help me?
  15. Differential equation (urgent pls!!!)

    Reduce the differential equation below to an exact equation (X - 2siny + 3)dx -(4siny - 2x + 3)dy=0. The problem here is how to solve for the integrating factor...any help pls?
  16. Algebra Help URGENT Please?

    Jamie is a salesperson in a shoe store and earns $95 per week, plus 20% of her weekly sales. If Jamie makes $475 in one week, what are her sales for that week?
  17. Math (repost, URGENT)

    A curve is traced by a point P(x,y) which moves such that its distance from the point A(-1,1) is three times the distance from the point B(2,-1). Find the equation of the curve and identity.
  18. Urgent physics help

    A plane flies 230 mph at 60 degrees north of west for 2.5 hours how far did the plane travel? how far west did it go? how far north did it go? how fast did it go west?
  19. Physics Help Please --- Urgent

    A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed? A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm
  20. Algebra Its Urgent!

    A second number is three times a first number. A third number is 15 more than the first number. If the sum of the three numbers is 330, find the numbers.
  21. Urgent help here! Math

    If 270kg of corn would feed 42 horses for 21 days, for how many days would 360kg of it feed 21 horses?
  22. Science

    can some one tell does composites produce a sulfuric acid when it erupts or does any volcanoes produce sulfuric acid please help urgent
  23. English

    Incorrect sentence: The report considers important factors in choosing a medical facility, ratings of services at the urgent care center, reasons why HMO members do not use the center, and offers suggestions for increase in member usage. I know this has
  24. Chem lab last question!! Urgent help

    Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at -3.9 degrees Celsius with each chemical. I know you

    Why did some of Roosevelt’s New Deal programs and agencies experience strong legal opposition? Farmers felt that they were unfairly targeted by subsidies. Labor unions opposed the restrictions imposed on them. People believed the federal government had
  26. vocab urgent

    i need 3 more sentences using circuitous please help i really need it! Thank you for using the Jiskha Homework Help Board but we do not DO the work for you! Use any good dictionary for the definition. Use any good Thesaurus for a synonym and/or antonym.
  27. Maths urgent help needed,

    1.Mr Sim bought new tv at a discounted price of 15%.He paid $836, inclusive of 3% GST(goods and services tax. What was the original price of the tv? 2.How to calculate original price before GST and before discount? What is the formula? Tks
  28. PHYsics URGENT

    the deepest part of the ocean is 10,900 meters deep. a) calculate the absolute pressure at that depth in units N/m^2. Use the mass density of sea water, 1030 kg/m^3. see part b for more info b) one atmosphere of pressure is about 1.013 X 10^5 N.m^2. How
  29. Algebra 2 URGENT

    Solve the problem. Round the answer to the nearest hundredth. Please Show All Work! A garden is currently 4 meters wide and 7 meters long. If the area of the garden is to be doubled by increasing the width and length by the same number of meters, find the

    Describe the major goals of two of the following movements: women, Latinos, Native Americans, people with disabilities, and consumers. Why do you think some of the same people who helped with these movements also helped with the environmental movement? I'm

    Add these two vectors: I used component law, and I got an answer, but I am unsure as to how to do the direction at the end. Add: 9m/s [N30E] and 2m/s [N60E] I wound up with 10.8m/s and I found an angle of 55 but I am unsure as to what do with the 55:
  32. physics urgent please help!

    way safety engineers build soft barriers so that cars hitting them will slow down at a safe rate. A person wearing a safety belt can withstand an acceleration of 300 m/s 2 . How thick should barriers be to safely stop a car that hits the barriers at 81.7

    the athletic department ordered a total of 29 basketballs and footballs for $1000. if the basketballs cost $30 each and the footballs cost $40 each, how many footballs were purchased?
  34. Math- urgent

    One more than 3 times a number is the same as 5 times the number, decreased by 15. Find the number. • Assign the variable • Write an equation • Solve equation
  35. URGENT Grammar

    In the sentence "She approved the apposed marriage" is approved a: (a)linking verb (b)action verb (mental) (c)action verb (physical)
  36. Business communication

    Pls! I need an urgent response my mentors. It is the ability of communication to foster speedy passage of information around that has shrunk the world and make globalisation a reality. In light of the statement above, what role does communication plays in
  37. Physics Urgent!!!!! I really need help with this

    Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be
  38. Math question urgent

    Mrs. Hart, at age 65, can expect to live for 25 years. If she can invest at 8% per annum compounded monthly, how much does she need now to guarantee herself $300 every month for the next 25 years? Present Value = 900(1 - 1.0041666..)^-300)/.0041666... =
  39. Bio(please it's urgent!)

    A person suffers from abdominal pain. other symptoms are - nausea and vomitting - fever 103 degree - pain in the middle of back - clammy skin her blood test tell the following things?: -high serum amylase -high serum lipase what do u think she is suffering
  40. URGENT MATH please

    Chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Jerri cuts the small rectangle in the middle that's left. How wide a strip does Chris cut so that they share the work equally? Solve by using quadratic
  41. Urgent =Math

    Tell whether this survey describes a good sample and if so, name the method of sampling used. A phone company randomly calls 6 names from the phone book to find whether the person is satisfied with the phone service. yes, random yes, systematic***** yes,

    A 13 kg box is at rest on a level floor. The coefficient of static friction µS = 0.9 and the coefficient of kinetic friction µK = 0.8. Audrey is applying a 140 N push at an angle (=20°) as shown in Figure 1. C) What is the magnitude of FNormal on box
  43. physics(urgent answer pls)

    A projectile is launched with 30m/s at an angle of 60degree with d horizontal (a) find d position of the projectile,and d magnitude and direction of its velocity at t=2s (b) find d time when d ball reaches the highest point (c) find d horizontal range
  44. English Literature

    Hello, I'm a English Literature student. I'm going to make a Project on William Shakespeare and John Milton. As I said, it's an English project, So please suggest me some good topics/title for both the projects. Also please give me some general tips and
  45. Check my math question please? Very urgent!

    The commute times during rush hour traffic on a local interstate have a mean of 25 minutes and a standard deviation of 5 minutes. Repeated studies of this section of interstate are considered normally distributed. What percent of commuters drive between 20
  46. Planning (URGENT)

    Describe 5 positive activities, events, or experiences in your life and why was it positive. Please help me. What does it mean when it talks about positive experiences? So would meeting my best friend be a positive experience? Please give me examples. So I

    Summarize two observations that are contrary to the predictions based on Newton’s laws but that confirm Einstein’s explanation of gravity. Indicate how the predictions based on Newton’s theory differ from Einstein’s.
  48. Pictures (URGENT)

    I need to draw pictures that represents the weather, for a poster assignment. But I'm having trouble with hot and sunny. what 2 different pictures can i draw to represent them? Also, cold, snowing, and windy. I need 3 different pictures to represent them
  49. Algebra help URGENT Please?

    Chris and five of his friends go out to dinner. The total bill comes to $124.29. They decide to leave a 20% tip. Each person will contribute an equal amount to the total tip. Estimate what each person should contribute. a$29.00 b$21.00 c$5.00 $4.15
  50. Grade 8 Math

    URGENT HELP!Squares into Primes Some primes can be expressed as the sum of two squares, as in 13=2^2+3^2; some can't:7=/=a^2+b^2. Other primes can be c^2+2e^2 like 11=3^2+2*1^2; still others are f^2+3 g^2, like 31=2^2+ 3* 3^2. Find all the primes less than
  51. English- URGENT! due date tommorow!!

    my teach gave me a project in which i have to make my own advertisement on a product of my choice. i have no idea what product i shud use!! please help!! The due date is tommorow and i still havent done it!!
  52. Physics - URGENT

    The seventh harmonic of a one end closed pipe organ has a frequency of 732 Hz, on a day when the temperature is 10 degrees Celsius. How long is the pipe? How long would it be for 732 to be the first harmonic?
  53. Math- urgent

    Solving Systems by Substitution Maribel has $1.25 in her pocket. The money is in quarters and dimes. There are a total of 8 coins. How many quarters and dimes does Maribel have in her pocket? I think the equation is 10x+25x=$1.25 and x+x=8 but I'm not
  54. math

    Find the values of theta (0,2pi) that satisfy sin theta= square root 3 over 2 Solve 2costheta sintheta-sintheta on (0, 2pi) please I really need help in knowing how to solve these questions. quite urgent. I don't understand how to do them at all.
  55. Physics

    Help imediately please very urgent! A stone is dropped from a cliff 200m high,if a second stone is thrown vertically upwards 1.50sec after the first was released,strike the base of the cliff at the same in stant as the first stone,with what velocity was
  56. APCHEm urgent!!!!!!

    Hi thank you so much!!!! What is a net ionic equation for the reaction of H+ with Cu(NH3)4 ^2+ ALSO what is the net ionic equation for the reaction of H+ with Hg2Cl2 Does the H+ addition increase, decrease, or has no impact on the solubility of the salt.?
  57. Math - Urgent

    The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?
  58. English (EXTREMELY URGENT)

    Please help he answer this one question. Which detail best describes why the author discusses the history of rap music. To show the extreme poverty of certain regions To explore the tension amongst certain cultural groups To expose events that are rarely

    Which sentence has a misplaced modifier? A. Covered with mold and dust, Mr. Rudolph examined the old textbooks on the shelf. B. I think that my favorite teacher will be Mrs. Alvarado, who is from Guatemala. C. Slowly walking through the crowded hallway,
  60. Chemistry URGENT/DR BOB

    Hello Dr. Bob I have been sick and missed some of my classes and my classmates want to act stupid. So if its not too much trouble could you just make sure that I am on the right track and let me know what is wrong and how I can fix them. I have a lot of
  61. urgent maths

    write the complement of: 1.(xdegree+5degree) 2.(24+a)degree 3.(1/4) right angle write the supplement of : 1.(27+a)degree 2.(7/8)right angle 3.(1.4)right angle 4.(54degree27minutes)
  62. math URGENT!!!!!!!

    a rectangular sheet of paper is folded in half, with the crease parallel to the shorter edge. it happens that the ratio of longer side to shorter side remains unchanged. what is this ratio? answer this and explain how u got the answer.. PLEASE??!
  63. math(Urgent)

    1) The number of bacteria N in a culture is given by N=250e^kt where t is the time in hours. If N = 280 when t=10 estimate the time required for the population to double in size. 280 = 250e^10k divide by 250 1.12 = e^10k ln 1.12 / 10 = .011 K = 0.11 Now I
  64. math(Urgent)

    1) The number of bacteria N in a culture is given by N=250e^kt where t is the time in hours. If N = 280 when t=10 estimate the time required for the population to double in size. 280 = 250e^10k divide by 250 1.12 = e^10k ln 1.12 / 10 = .011 K = 0.11 Now I
  65. URGENT - history

    Heya The Cartoon on Getty Images, Cosy Communist circa 1940. I'm trying to find where it was originally published and who originally drew it so that I can put that in my research journal. We are graded on our research journal and it documents like all our
  66. Math..urgent.pls help!:(

    A Volkswagon Beetle convertible sedan is worth $16,615 now and is expected to be worth $8950 in 4 years. a) find a linear depreciation function for this car. b) estimate the value of the car 5 years from now c.) at what rate is the car depreciating? thanks
  67. History, Urgent

    In 1801, which of the following were Robert Livingston’s objectives when negotiating with the French? i. to stop Spain from transferring land to France ii. to buy New Orleans and Florida from France iii. to create an alliance with France against Spain
  68. Physics pls anyone can help me? its urgent

    Three negative charges with charge -q occupy the vertices of an equilateral triangle with sides of length L What is the magnitude of the electric field in units of k*q/L^2 at the center of the triangle? Give a numerical answer that is the number that would

    Landscape with Classic Ruins and Figures by Marco Ricci and Sebastiano Ricci To evaluate the success of this image, you would do all of the following EXCEPT A. Describe the scence presented B. Analyze the color schemes C. Interpet the meaning of the color
  70. algebra

    if sin alpha is 0.28° where 0° is less than or equal to alpha less than or equal to 90°, evaluate cos alpha, tan alpha, sec alpha, cosec alpha and cot alpha. please help, it's urgent.
  71. Urgent need help on chem please someone

    A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is
  72. Statistics (urgent)

    A beverage comopany uses a machine to automatically fill 1-liter bottles. Assume that the population of volumes is normally distributed. The company wants to estimate the mean volume of water to within 1 ML. Determine the minimum sample size required to
  73. Legal Studies URGENT

    Hi beautiful people I need help incorporating the Police Powers and Responsibilities Act OR the Queensland Criminal Code into an argument about victimless crime. My two issues are currently the role of paternalism in the legal system and at what point the
  74. math urgent

    In an election Ram and sham were two candidates. Ram got 54% of the votes cast and secured the majority of 250 votes. If none of the votes cast were invalid, find the number of vote cast?

    what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by
  76. Physics -URGENT-

    A 55 kg boy and a 37 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.4 m/s^2, determine the magnitude of the acceleration of the boy toward the girl in m/s^2
  77. Physics-urgent

    A speeder is driving down the road at a constant 20 m/s, he passes a patrolman parked on the roadside. The patrolman waits 3 seconds, then pursues the speeder, accelerating at a constant 4.0 m/s. How long does it take the patrolman to catch the speeder?
  78. Calc 2 Urgent Surface Area of Revolution Question

    Find the area of the surface generated when y=4x and x=1 is revolved about the y-axis. We have to use the surface area formula of revolution. Integral (2pi*f(x)sqrt(1+f'(x)^2))dx
  79. math very urgent

    First, do you get the same sum when you use 18 rather than 9 as a common denominator for 2/3 and 4/9? Explain the answer. Also what extra step will you have to perform if you do not use the least common denominator when adding fractions? Please explain the
  80. Career Urgent

    Why do you need to take a business course to become web designer/developer? I know it's a skill but what does it do? I answer why do web designer/developer need math and computer-related courses and now I need why do you need business. please help and

    1) Describe England post Henry VIII 2) Identify what Edward VI Did 3) Describe the affects on ENGLAnD WHILE HENRY THE VIII WAS RULING
  82. Physics - URGENT

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far
  83. science URGENT!!

    what is the relationship does wave height have with frequency? What is the relationship does wave height have with amplitude?
  84. Science URGENT

    Is there any website or any way I can get the science probe 10 check your understanding answers cause I want to check my answers?
  85.'s urgent!

    1.State the name of the removable disk which was invented in 1962. 2.Who invented the removable disk?
  86. Physics Urgent!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in
  87. Physics Urgent!!!!!

    Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in
  88. 11th grade English urgent

    actually i am not clear about the question too. we have done a story of N. Scott Mamaday where he describes about his horse which he later sells to a Spainish man. He says " I knew where the journey was begun, that it was a learning of the beginning, that
  89. Physics (URGENT)

    Three wire-wound resistors have the following values: 30 ohms, 80 ohms, and 100 ohms. Each resistor has a voltage rating of 100V. If these three resistors are connected in series, can they be connected to a 240V circuit without damage to the resistors?
  90. Minimum Concentrations - Urgent help!

    What is the minimum concentration? Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the solution on the left. 8.0 x 10^-2 CaI2, K2SO4 1.5 x 10^-3 AgNO3, RbCl The Ksp values for both are
  91. physics(URGENT!!!!!)

    An object of mass m=80 kg moves in one dimension subject to the potential energy U(x)=λ4(x2−a2)2+b2x2.(1) Here we use λ= 1 kg/(m2s2), a= 7 m, and b= -11 kg/s2. (a) How many equilibrium points (stable and unstable ones) does this potential
  92. Calculus Help Please Urgent!!!

    A cone-shaped paper drinking cup is to be made to hold 30 cm^3 of water. Find the height and radius of the cup that will use the smallest amount of paper. (Round your answers to two decimal places.) Height = ? Radius = ? Show work please!!!
  93. math URGENT!!!!!!!!!!!!

    a 12x12-inch square is divided into n^2 congruent squares by equally spaced lines parallel to its sides. circles are inscribed in each of the squares. find the sum of the areas of the circles. answer and please explain step by step how u got the answer!!
  94. URGENT!!!!!! science.....hurry!!!! please

    The elements from which of the following groups are most liekly to react with potassium(K)? A. Group 2 B. Group 7 C. Group 13 D. Group 17 I think it is either A or D. Look at your periodic table. K is a metal. It will react with
  95. urgent (physics)

    A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that

    Because she wants to go to medical school, Becky will need to take extra science classes, and she also wants to learn Latin. The sentence above is a A. compound sentence. B. complex sentence. C. compound-complex sentence. D. simple sentence. I think.....
  97. English... Urgent

    Look at the following puzzles and try to decipher the well known sayings 1. Ban ana 2.nafish nafish 3.japmadean 4.issue issue issue issue issue issue issue issue issue issue 5. Lookuleap Note that I have not typed any of these words wrong
  98. MATH!!! URGENT!!!!

    The probability of making a 6 ft putt is 60%. How many times should you except to make it if you putt the following number of times. 5 times 10 times 30 times 160 times
  99. Urgent Math

    f(x)=(x+2)^3-4. The point (-2, -4) is which of the following? A) An absolute maximum B) An absolute minimum C) A critical point but not an extremum. D) Not a critical point E) None of these I think the answer is C, am I right?
  100. Rather Urgent math~!

    1) 2(3x+5)=46 (1point) 4 5 6 7*** 2) 1/2x + 1/4x = 16 (1point) 16 21.3*** 32 64 3) 6-x-x=18 (1point) -6 6 9*** -9 4) 4x – 3/5 = 2/5 (1point) 1/5*** 5/5 1/2 1/4 Am I correct???