1. calculus

    a mass m is projected vertically upward with an initial velocity u. the air resistance is given as kv^2. the mass returns to point of projection with velocity v0. prove terminal velocity is given by vT=uv0/sqrt(u^2-v0^2). Hint distances travelled upwards

    asked by wes on April 6, 2016
  2. physics

    A large, cylindrically-shaped weight is suspended from a long spring found hanging from a rafter. The weight is slender metal cylinder about two meters long that is suspended with its flat bottom about half meter above the level concrete floor. When a 1 kg

    asked by sand on December 27, 2011
  3. Physics

    A painter of mass 80.0 kg stands on a platform of mass 75.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 400.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration

    asked by Ashley on September 21, 2016
  4. chemistry

    In the chemistry exp molar mass of a volatile liquid what will be the outcome if the hole in the aluminu foil was larger would it make the molar mass high or low. Or what will happen if yhr water vapors condensed under the aluminum foil before the final

    asked by tiffany on April 10, 2012
  5. physics

    A painter of mass 90.0 kg stands on a platform of mass 50.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 600.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration

    asked by shyne on September 28, 2012
  6. Chemistry

    A solid sample of a hydrate salt, NaNO3xH2O, was heated gently to drive off all the water of crystallization. Starting with a mass of 7.494g of NaNO3xH2O, a mass of 5.263g of the anhydrous salt, NaNO3 was obtained. Determine the value of x (which is

    asked by Adalaide on August 18, 2013
  7. physics

    A spring with a spring-constant 2.2 N/cm is compressed 28 cm and released. The 5 kg mass skids down the frictional incline of height 31 cm and inclined at a 18◦ angle. The acceleration of gravity is 9.8 m/s2 . The path is frictionless except for a

    asked by melissa on June 12, 2012
  8. physics

    A spring with a spring-constant 2.2 N/cm is compressed 28 cm and released. The 5 kg mass skids down the frictional incline of height 31 cm and inclined at a 18◦ angle. The acceleration of gravity is 9.8 m/s2 . The path is frictionless except for a

    asked by melissa on June 12, 2012
  9. physics

    A 5.00 kg mass is connected by a light cord to a 3.00 kg mass on a smooth surface as shown in the figure. The pulley rotates about a frictionless axle and has a moment of inertia of 0.300 k∙m2 and a radius of 0.500 m. Assuming that the cord does not slip

    asked by Anonymous on November 11, 2012
  10. physics

    A rocket of total mass 2580 kg is traveling in outer space with a velocity of 111 m/s. To alter its course by 32.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of

    asked by peyton on March 11, 2010
  11. Chemistry

    8.40 grams of Hydrogen gas reacts with 48.2 grams of Oxygen gas. Give the mass of the water vapor produced and the mass of the excess reactant left over. Can somebody please explain stoichiometry to me? I've failed the test and the retest. I'm usually able

    asked by Anna on November 29, 2010
  12. geology,, please help me

    can you give me answers for these question for my homework. thank you 1. why dopeople fear earthquakes, hurricanes, and tornedoes more than they afraid than landslide? 2. if you were building a house on a cliff what would you look for to ensure that your

    asked by jessie on April 21, 2012
  13. physics - linear momentum with rockets

    A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s. To alter its course by 35.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of

    asked by clay on October 16, 2009
  14. Physics - Angular Speed Question

    A merry-go-round can be modeled as a disk with radius 2.5 meters and mass of 150 kg. For this problem, assume the density is uniform. It is initially rotating at 2.0 rad/sec. Two children of mass 30 kg and 40 kg hop onto the merry-go-round and stay near

    asked by Anon on November 11, 2016
  15. biology

    Suppose you plant a seed and observe that a tree of large mass grows from it. The tree achieves a final mass that changes very little for years afterward. Which of the following is true about the tree? (1 point) Both anabolic and catabolic reactions took

    asked by Nunyaa on August 24, 2012
  16. Grade 9 Chemistry (2)

    What is one way in which Noble Gases are different from other elements? a. Noble Gases have low boiling points b. Noble gases have high melting points c. Noble gases have extremely high densities d. Noble gases have unusually high atomic masses Also, what

    asked by Erika on June 20, 2012
  17. math

    Your optimal exercise heart rate for cardiovascular benefits is calculated as follows: Subtract your age from 220 and then find 80% of the difference. Find the optimal heart rate for a 40-year-old and for a 10-year-old. Rounded to the nearest whole number,

    asked by taylor on May 4, 2014
  18. physics help

    Example 11-9 depicts the following scenario. A cat walks along a plank with mass M= 7.00 kg. The plank is supported by two sawhorses. The center of mass of the plank is a distance d1= 0.850 m to the left of sawhorse B. When the cat is a distance d2= 1.11 m

    asked by sinti on May 9, 2017
  19. Physics HELP PLZ :(

    A 2.0 kg mass is placed in front of a spring (K = 40 N/m) which has been compressed to its maximum of 20.0 cm. (a)If the spring is released, determine the velocity of the mass at the instant that the spring is only compressed 10.0 cm. (b) Determine the

    asked by Aria on June 24, 2012
  20. Pre-Calculus

    A drug is administered every 6 hours. The kidneys eliminate 55% of the drug over that period. The initial dose is 210 mg. Repeated dosage is 70 mg What is the “Difference equation”? Find the first seven terms of the of the solution sequence. Round to

    asked by Anonymous on May 19, 2016
  21. Pre-Calculus

    A drug is administered every 6 hours. The kidneys eliminate 55% of the drug over that period. The initial dose is 210 mg. Repeated dosage is 70 mg What is the “Difference equation”? Find the first seven terms of the of the solution sequence. Round to

    asked by Anonymous on May 19, 2016
  22. physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 7.8 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 56° when they move past the

    asked by dominic on September 21, 2014
  23. Physics

    A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.2 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 62° when they move past the

    asked by Student on September 3, 2007
  24. Physics

    A drone capable of flying north at a speed of 4.0 m/s in still air is attempting to fly across a field 120 m wide. There is a wind blowing at 5.0 m/s [E]. a) Find the drone's velocity relative to the ground. b) Find the time it takes the drone to cross the

    asked by Taha on December 7, 2015
  25. Physics

    A 55-kg person carrying a 5.0-kg ball slides along a horizontal frictionless surface. He tosses the ball perpendicular to his direction of travel relative to himself. a. his path will not change b.the ball will have a smaller angle from he original path

    asked by Anonymous on January 17, 2010
  26. Physics

    The solid fuel of a 300.kg rocket travelling at 1.64x104 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. 10.00 kg of fuel is burnt in 15.00 s. If the exhaust velocity of the fuel, relative to the rocket, is 2.90x103 km/h, what is

    asked by Jeff on October 26, 2012
  27. Chem.

    Sorry if I confused you. I miss-wrote my question. My question was: How can I determine the concentration of HCl remaining in the flask. I calculated the # of moles of HCl neutralized by the tablet which was around 0.014 M. I don't understand the steps

    asked by Help!! on July 7, 2015
  28. Chemistry

    a) A current of 1.50 Amperes passes through a solution of AgNO3 for 3.0 hours. What mass, in grams, of silver collects on the cathode? (molar mass of silver = 107.9 g/mol) b) How many seconds would it take to collect 100 g of silver to collect on the

    asked by Morgan on March 5, 2015
  29. Science

    Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond energy internal energy D A 0.10 kg

    asked by Lena on January 23, 2012
  30. physics

    Posted by sandhu on Sunday, November 28, 2010 at 10:03pm. A 7200 lb airplane lands on an aircraft carrier with a speed of 72 ft/s. The plane is caught by an elastic band (k=998 lb/ft) that has an initial stretch of 5.6 feet. What is the maximum distance

    asked by sandhu on November 29, 2010
  31. Physics

    A horse of mass 187 kg pulls a cart of mass 200 kg. The acceleration of gravity is 9.8 m/s2 . What is the largest acceleration the horse can give if the coefficient of static friction between the horse’s hooves and the road is 0.612? Answer in units of

    asked by Lyndsay on December 14, 2017
  32. Physics

    A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?

    asked by Bill on November 5, 2013
  33. Science

    A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm,

    asked by John on November 30, 2011
  34. physics

    A block of wood with a mass of 4.62 kg sits on the edge of a table that is 0.99 m tall. A bullet with a mass of 70.5 g traveling with a speed of 450 m/s is shot into the block and is lodged in it. Assuming that no energy is lost to friction, how far from

    asked by dean on February 9, 2014
  35. Physics

    An object consists of 5 masses, each of mass m, connected by massless rods. The two short rods have length L and the two long rods have length 2L. What is the moment of inertia about an axis perpendicular to the diagram (out of the page) and through the

    asked by Samantha on November 10, 2016
  36. Physics

    One of the more unusual of world wonders is the plain of jars in laos. Several hundred huge stone jars, which do not seem to made from rock, are scattered across the plain. The largest of these jars has a mass of around 6.0 x 10^3 kg. Express this mass in

    asked by NoNo100 on September 9, 2009
  37. physics

    a car of the mass m kg travels on a straight,level road. the driving force of the engine is 4000N and the total resistance due to air friction and tires on the road is 300N. if the car accelerates at 3m/s2 ,what is the mass m of the car

    asked by cari on April 8, 2015
  38. physics

    Before going into orbit, an astronaut has a mass of 55 kg. When in orbit, a measurement determines that a force of 67.1 N causes her to move with an acceleration of 1.1 m/s2. To regain her original weight, should she go on a diet or start eating more

    asked by David on September 23, 2012
  39. physics

    A basketball explodes into three separate pieces. Two pieces of equal mass shoot off at 20.3 m/s, one travelling to the south and one to the west, perpendicular to each other. The third piece has a mass 4 times the size of one of the other pieces. What is

    asked by HELP!!! on November 15, 2016
  40. physics

    From a tree that is 15m tall, a fruit of mass 2kg falls to the ground. (a) find the initial GPE (b) find the speed at impact (c) find the KE at impact (d) how much energy was lost to heat and sound after the mass came to rest?

    asked by Madi on March 15, 2011
  41. Physics

    A ball of mass m makes a head-on elastic collison with a second ball (at rest) and rebounds in the opposite direction with a speed equal to 1/4 it's original speed. What is the mass of the second ball? I would really apprieciate it if ya'll would show

    asked by Henry on November 9, 2012
  42. chemistry

    The peanut studied had a mass of 0.609 g before combustion and 0.053 g after combustion. The energy released during combustion caused a 14.2 degree Celsius increase in the temperature of 200.0 mL water in the calorimeter. Calculate the mass of peanut

    asked by Lauren on August 30, 2012
  43. Physics

    A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?

    asked by Isaac on June 21, 2011
  44. physics/calculus

    I need help in calculating work. following quantites are given. * G: 6.67E-11 *Mass of earth:5.98E24 *mass of satelightt:80kg *x(initial) center of the earth-7E6 m *x(final) center of the earth 12E6 m How do I make integral equation I need use 20 interval.

    asked by jenny on April 7, 2014
  45. Physics

    A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm,

    asked by warrren on November 28, 2011
  46. MECHANICS NEED HELP ASAP PLEASE !!!

    A block of mass 3.8 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 20 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 60 cm,

    asked by shek on December 1, 2013
  47. science

    Ball 2 with a mass of 30 kg, is moving left at 10 m/s. At what velocity should ball 1, with a mass of 10 kg, move to the right and collide with 2, so that ball 1 rebounds with a velocity of 10 m/s. assume that the collision is perfectly elastic.

    asked by Milli on February 21, 2012
  48. honors chem

    determine the mass of the following example 1.3 x 10^26 iron atoms in iron III oxide, mass of iron II oxide I know this is a 2 part question and you have to use Avogadro's number, but I am clueless as to how to solve it.

    asked by keeley on September 21, 2015
  49. Physics

    Two objects of same material are travelling near you. Object A is a 1.5 kg mass traveling 13.5 m/s; object B is a 2 kg mass traveling 5 m/s. Which object would make you feel worse if you are hit by it? 1. B 2. A 3. Unable to determine 4. the same

    asked by Kim on February 14, 2015
  50. physics

    a neutron of mass 1.67*1o power of (-27) is moving with a velocity 10 to the power of(6) collides with a deuteron of mass 3.34*10 to the power of (-27) kg at rest .after collision if both have single particle find its velocity

    asked by srikala on April 11, 2012
  51. Physics

    A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?

    asked by Eric on December 10, 2009
  52. physics

    An object of mass m has an elastic collision with another object initially at rest, and continues to move in original direction but with one-third its original speed. What is the mass of the other object in terms of m?

    asked by SR485 on December 2, 2014
  53. Science

    A fishtank with inside dimensions of 164 cm X 76 cm X 96 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms?

    asked by Angela on May 14, 2015
  54. physics

    Car X passes car Y on a motorway. Car X is travelling at 1.5 times the speed of car Y. The mass of car X is 5/4 of the mass car Y. How do the kinetic energies of the two cars compare? (the answer is KE (X) = 1.80 * KE (Y))

    asked by Valeriya on February 4, 2019
  55. physics

    A bug that has a mass mb = 1 g walks from the center to the edge of a disk that is freely turning at 38 rpm. The disk has a mass of md = 11 g. If the radius of the disk is R = 30 cm, what is the new rate of spinning in rpm?

    asked by katie on March 25, 2012
  56. physics

    An astronaut whose mass is 80. kg carries an empty oxygen tank with a mass of 10. kg. The astronaut throws the tank away with a speed of 2.0 m/s. With what velocity does the astronaut start to move off into space?

    asked by Cory on December 7, 2009
  57. Physics

    The mass of ball A is 10kg and the mass of ball B is 5kg. If the initial velocity is set to 3 meters per sec for each ball, what is the final velocity of ball B if the final velocity of ball A is 2 meters per second? Use the elastic collision equation to

    asked by Anonymous on January 21, 2018
  58. Physical science b

    The mass of ball A is 10kg and the mass of ball B is 5kg. If the initial velocity is set to 3 meters per sec for each ball, what is the final velocity of ball B if the final velocity of ball A is 2 meters per second? Use the elastic collision equation to

    asked by Anonymous on January 21, 2018
  59. physics

    A mass m = 76.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 19.7 m and finally a flat straight section at the same height as the center of the loop (19.7 m off the ground). Since the mass would not make it

    asked by Anonymous on September 28, 2012
  60. chemistry

    Thanks for your help. I have a problem to solve et don't know how to do part of it. We have a solution of XNO3 (X = monovalent cation We add a solution of K2SO4. We obtain an insoluble sulfate which precipitate and KNO3 The precipitate = 3.900 g The

    asked by Ele on April 27, 2016
  61. Physics

    HBO is concerned about injuries on the set of their award winning fantasy series Game of Thrones. Star characters are given real swords which have a point of balance (centre of mass) 5.0cm above the top of the handle. For safety reasons, you are given only

    asked by Taylor on March 11, 2017
  62. physics

    A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The

    asked by Donna on December 5, 2013
  63. physics

    A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The

    asked by Donna on December 9, 2013
  64. PLEASE HELP!! PHYSICS

    A 0.63-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.22 m (relative to its unstrained length), the speed of the sphere decreases from 5.95 to 4.75 m/s. What is the spring constant of the spring? (The

    asked by Elizabeth on December 1, 2012
  65. Physics

    A 0.56-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.26 m (relative to its unstrained length), the speed of the sphere decreases from 5.45 to 4.90 m/s. What is the spring constant of the spring? (The

    asked by Elizabeth on November 30, 2012
  66. Chemistry 22

    1. Lead (Pb), has a density of 11.35 g/ml. If I have 3.45 cc of lead, what is the weight in grams? 4. I am traveling at 100 mph per hour before getting pulled over. Convert this into meters Per second. (A) 161 m/s (C) 161000 m/s (B) 4.44 m/s (D) 44.4 m/s

    asked by Ivy on August 31, 2010
  67. physic

    The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of

    asked by hy on November 21, 2010
  68. physics

    The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of

    asked by BrookeNeed on September 29, 2016
  69. physics

    The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of

    asked by Dee on February 7, 2013
  70. Physics

    The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of

    asked by vanessa on February 22, 2018
  71. Physics - 2-D kinematics

    A soccer ball is kicked with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 16 m/s. I've calculated: Initial Speed: 25.61 m/s Angle: 38.66 degrees Maximum Height it reaches: 13.06 m Distance kicked: 65.29m NOW I NEED: What is

    asked by Anonymous on February 3, 2012
  72. Chemistry

    What mass of ammonia is left in excess? 5 Changed: Your submitted answer was incorrect. Your current answer has not been submitted. g The production capacity for acrylonitrile (C3H3N) in the United States exceeds 2 million pounds per year. Acrylonitrile,

    asked by gh on January 19, 2019
  73. chemistry

    1. Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g 2. Mass of flask, boiling chips and foil cap. 82.657 3. water bath temperature C 95.0 C 4. Barometric pressure in Hg 30.09 5. Accepted molar mass of unknown 86.2g/moles 6.

    asked by Patty on June 14, 2010
  74. Physics

    A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes

    asked by Robert on February 5, 2008
  75. physics

    A 125 kg crate rests on the flatbed of a truck that moves at a speed of 15.0 m/s around an unbanked curve whose radius is 66.0m. This crate does not slip relative to the truck. Obtain the magnitude of the static frictional force that the truck bed exerts

    asked by Lynda on November 3, 2010
  76. Chemistry

    A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was

    asked by Sara on May 9, 2007
  77. Math

    Suppose A and B are events with P(A)=1/6, P(B)=5/6 and P(A and B)=1/12. Find each of the following a. P(AorB)= Formula: P(A)+P(B)-P(A&B) 1/6+5/6-1/12=11/12 b. P(not A) 1-1/6=5/6 c.P(not B)= 1-1/12=11/12 I am lost here can please correct any mistakes I did

    asked by Keonn'a on October 9, 2018
  78. math 211(linear algebra)

    uppose that the sequence x0, x1, x2... is defined by x0 = 4, x1 = 2, and xk+2 = 4xk+1+5xk for k≥0. Find a general formula for xk. Be sure to include parentheses where necessary, e.g. to distinguish 1/(2k) from 1/2k. .

    asked by danial on December 7, 2014
  79. AP Chem

    Write the net ionic formula. A bar of strontium metal is immersed in a 1.0 M copper (II) nitrate solution. How do I go about doing this?

    asked by Needs help on October 3, 2007
  80. Physics

    Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m. Is the formula F=1/T?

    asked by Denise on April 2, 2013
  81. Math

    If $1500 is invested at an interest rate of 3.5% per year, compounded continuously, find the value of the investment after 3 and 6 years. What formula would i use?

    asked by Morgan on November 19, 2013
  82. algebra

    To find the amount A in an account after t years with principal P and an annual interest rate r compounded continuously, you can use the formula

    asked by angie on December 13, 2014
  83. algebra

    What is the average rate of change from 0.04 to 0.06 to 0.15 to 0.25 to 0.33. I am doing some reserch on the price of an item here is my information but, I can't remember the formula or find it in my textbook. I could really use some help.

    asked by ...Please! on February 5, 2018
  84. Calculus Derivative- Taylor Series?

    let f(x)= x/x-1 find f'(x) f ''(x) and a formula for f ^ (n) * x. I found the first and second derivatives but do not know how to make a general equation for this. I have not learnt the Taylor or Maclaurin Series either. Thank you.

    asked by Lisa on March 10, 2013
  85. calculus

    Find the exact value of the given expression using a sum or difference formula. sin 345° Can you help with this? I got 1/4 (squareroot 2 - square root 6)

    asked by megan on July 11, 2016
  86. Algebra II

    Find the exact solutions to 6x^2+x+4=0 by using the quadratic formula. x=-b+-sqrtb^2-4ac/2a -1+-sqrt1^2-4(6)(4)/2(6) -1+-sqrt-95/12 -1-95/12 -96/12 x= -8 -1+95/12 94/12= 7.8333.. [-8, 7.83](answer)

    asked by Jon on March 1, 2008
  87. math-physics

    How much work is done lifting a wrecking ball 6.50 m above the ground? So the formula for this problem would be: W=fs F=200kg S=6.50m (200)(6.50)=1300

    asked by ben green on October 9, 2014
  88. algebra

    find the lenngth of each side of the rectangle so that it has the given perimeter. p= 50 in length is 2L-5 width is L is my formaula i am needing to do this 50=2L-5+2*L i am looking at the formula of P=2L+2W do i have this written right should have been 50

    asked by allen on March 29, 2007
  89. Chemistry

    Draw the structures of the three primary (1°) amines with molecular formula C5H13N that contain five carbon atoms in a continuous chain.

    asked by Hayley on February 10, 2016
  90. chemistry

    Draw the structures of the three primary (1°) amines with molecular formula C5H13N that contain five carbon atoms in a continuous chain.

    asked by Hayley on February 11, 2016
  91. physics

    what is the formula for finding the magnitude of average acceleration simplified into length, velocity, time, and delta units?

    asked by Gwen on July 9, 2008
  92. chemistry

    0.5mols of a mono alkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)

    asked by EMMANUEL on October 12, 2016
  93. Chemistry

    This is a conversion question. 2.78mg to ___________ kg. I've tried the standard formula - ex (2.5 m) (1000m/1m)=2500mm - but it just gives me 2.78e-6. Please help it's driving me crazy.

    asked by Victoria on January 26, 2017
  94. Calculus

    At time t (in days), the size S of a population of butterflies is given by the formula s= 600/1+49(0.6)^t. When does the maximum growth rate occur?

    asked by Leslie on December 3, 2015
  95. physics

    Determine the force of interaction between 2 electric charges q1= 1x10-6 C and q2= 2x10-6 C at the distance r = 2 m. I think the formula is F=kq1*q2/r2? How do I find k?

    asked by physicsclass on April 23, 2011
  96. Chemistry

    Dilute H3PO4(aq) and NaOH(aq) are mixed in chemically equivalent quantities. Write the formula equation for the reaction

    asked by Donna on April 30, 2011
  97. math algebra

    Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x=

    asked by student on April 16, 2013
  98. 0.5mols of a monoalkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)

    0.5mols of a mono alkanoicacid weighs 44 grams, determine the molecular formula and name the acid. (show the workings)

    asked by EMMANUEL on October 12, 2016
  99. chemistry

    Please show me how to calculate the number of moles in 8.45 x10 to 21st power formula units of calcium chloride?

    asked by Bev on January 30, 2011
  100. math

    derivative: 4/(1-2x^2) Use the general formula for deriving fractions. I remember a nmemonic like "lo di hi less hi di lo all over lo squared". ...or write it as 4*(1-2x^2)^(-1) and use the chain rule.

    asked by joe on September 27, 2006

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