Questions Asked on
November 30, 2012

Chemistry
When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs? a. KCl(aq) + Pb(NO3)2 (aq) ¨ KNO3 (aq) + PbCl2 (s) b. KNO3 (aq) + PbCl2 (s) ¨ KCl(aq)
asked by Z 
science, chemistry
Separate this redox reaction into its component halfreactions. O2+2Cu>2CuO thought it was: Oxidation 2e+O2>2O(2) Reduction Cu>Cu(2+)2e but this is wrong
asked by Cari 
chemistry... HELPP
Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette smoke. Pyridine ionizes in water as follows: C5H5N + H2OC5H5NH+ + OH The pKb of pyridine is 8.75. What is the pH of a 0.190 M
asked by joane 
calculus
A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?
asked by Mike 
PHYSICS
Light waves are electromagnetic waves that travel at 3.00 108 m/s. The eye is most sensitive to light having a wavelength of 5.50 107 m. (a) Find the frequency of this light wave. __________ Hz (b) Find its period. _______________ s
asked by Ame 
Math
Which of the triangles described in the table is a right triangle? Triangles: Q, R, S, T Side 1: Q = 25, R = 26, S = 25, T = 25 Side 2: Q = 20, R = 20, S = 20, T = 26 Side 3: Q = 15, R = 26, S = 1,025, T = 650
asked by Kitralia Brown 
Physics
A fire hose 10 cm in diameter delivers water at the rate of 23 kg/s. The hose terminates in a nozzle 3.1 cm in diameter. (a) What is the flow speed in the hose? (b) What is the flow speed in the nozzle?
asked by Jeremy 
math
Find the unit rate. Round to the nearest tenth. 344 miles in 11 hours i try and try i still don't get it please anybody could help me please =(
asked by Alexa=( 
physics
A solid sphere is released from the top of a ramp that is at a height h1 = 1.95 m. It goes down the ramp, the bottom of which is at a height of h2 = 1.38 m above the floor. The edge of the ramp is a short horizontal section from which the ball leaves to
asked by RagingRice 
Physics
An organ pipe is open at both ends. It is producing sound at its third harmonic, the frequency of which is 406 Hz. The speed of sound is 343 m/s. What is the length of the pipe?
asked by LS 
MATH
An urn contains 8 pink and 7 red balls. 6 balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all 6 balls drawn from the urn are pink? Round
asked by Cindy 
math
(4,?) is on the line below. Find the other half of the coordinate. y=3/4x+3
asked by Chely 
PHYSICS
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 11.5 s. (a) How tall is the tower? _________ m (b) If this pendulum is taken to the Moon, where the
asked by Ame 
math
Thinking about the different types of numbers you learned in this unit, how would you help someone remember the differences between rational and irrational numbers? PLEASE ANSWER NICE AND NEAT AND CORRECT PLEASE AND THANK YOU!! =)
asked by Sammy, !!!Please Answer!! 
Physics
A tow truck is pulling a car out of a ditch by means of a steel cable that is 9.3 m long and has a radius of 0.50 cm. When the car just begins to move, the tension in the cable is 1070 N. How much has the cable stretched? Answer in m
asked by Elizabeth 
CHEMISTRY
The standard electrode potential for the reduction of Eu3+(aq) to Eu2+(aq) is −0.43 V. determine which of the following is capable of reducing Eu3+(aq) to Eu2+(aq) under standardstate conditions? (a) Sn2+(aq) (b) ln(s) (c) HCN(aq) (d) La(s)
asked by help 
physics
Children slide down a frictionless water slide that ends at a height of 1.80 m above the pool. If a child starts from rest at point A and lands in the water at point B, a horizontal distance L = 2.43 m from the base of the slide, determine the height h of
asked by HELP!!! 
pre calculus
For a given right triangle, side a = 400 feet and side b = 900 feet. What is the measure of angle B to the nearest degree?
asked by Kelsey 
physics
A car with a mass of 980 kg is initially traveling east toward an intersection with a speed of vc = 18.9 m/s and a 1500 kg pickup is traveling north toward the same intersection. The car and truck collide at the intersection and stick together. After the
asked by Diane 
Physics
A 15.0kg block rests on a horizontal table and is attached to one end of a massless, horizontal spring. By pulling horizontally on the other end of the spring, someone causes the block to accelerate uniformly and reach a speed of 5.00 m/s in 0.460 s. In
asked by Elizabeth 
PHYSICS  PLEASE HELP
A box of weight w=2.0 N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude n= 1.7 N, the coefficient of kinetic friction between the box and the plane is .30, and
asked by Anonymous 
math
3) In the country of Sweden, a bill becomes a law only if 38/50 of the senators approve it. What percentage 38/50? Answer Please !!
asked by !!PLEASE ANSWER!!! 
PHYSICS
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 7.70 cm from its unstretched position when the system is in equilibrium as in the figure below. If the spring constant is 48.0 N/m, determine
asked by Ame 
Chemistry
Consider the following: CH4, SiH3Cl, Ar, and CH2F2. (a) Which one will diffuse the fastest? (b) What is the rms speed (m/s) of the slowestmoving atom or molecule at 25°C?
asked by Sam 
Pre Calculus
For a given right triangle, side a = 76.4 feet and side b = 39.3 feet. What is the measure of angle A to the nearest degree?
asked by Kelsey 
MATH
Harriet needs to ship a small vase. The box she will use has a volume of 216 cubic inches. If the side lengths are all the same, what is the length of each side of the box? Hint: V = S^3 PLEASE ANSWER NICE AND NEAT AND CORRECT PLEASE AND THANK YOU!! =) :)
asked by Sammy, !!!Please Answer!! 
Math
Patsy has cheerleading practice on every fourth school day. She wants to be in the school play, but they have practice on every sixth school day. If both started on September 5th, what would be the first date that she has to choose between cheerleading and
asked by Bell 
English
How does Sandburg portray Lincoln as a politician? (in the story 'a Lincoln preface') A. practical B. misleading C. dishonest D. amateurish . I think it is A., What do you think?
asked by Lexis 
pre calculus
For a given right triangle, angle A = 61± and side b = 39 feet. What is the length of side a to the nearest foot?
asked by Kelsey 
Statistics
The time per week a student uses a lab computer is normally distributed, with a mean of 6.2 hours and a standard deviation of 0.9 hour. A student is randomly selected. a. Find the probability that a student uses a lab computer less than 4 hours per week.
asked by jonathan 
Physics HELP!!
1. What is the longest wavelength for standing sound waves in a 133.9cm long tube that is open at both ends? b).What is the second longest wavelength? c).What is the third longest wavelength? d).What is the longest wavelength for a standing wave, in the
asked by joane 
pre calculus
For a given right triangle, side a = 76.4 feet and side b = 39.3 feet. What is the length of side c to the nearest tenth of a foot?
asked by Kelsey 
Health
Ken's target heart rate is 122139bpm. His resting heart rate is 73 bpm. What is his age?
asked by Leslie 
math
1) Write a translation rule that maps point D(7, –3) onto point D'(2, 5). 2) Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the xaxis. Note: PLEASE ANSWER NICE AND NEAT AND
asked by Tommy Please Answer!! 
CHEMISTRY
Cant figure this out, I feel like the answer I keep getting is way too low. A voltaic cell is constructed that is based on the following reaction: Sn2+ (aq) +Pb(s) = Sn(s) + Pb2+ (a) If the concentration of Sn2+ in the cathode compartment is 1.00M and the
asked by jo 
chemistry
A student measures the conductivity of a KNO3 solution and determines it to be a strong electrolyte. the student incorrectly lists the species in solution as KNO3,K+, NO3. Give the correct list of species in solution? Please help I am lost
asked by Min 
Chemistry
An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the controlled reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g)= CN2H4O(s) + H2O(l) What is the theoretical yield of urea when
asked by Jack 
physics
A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
asked by rick 
English
1. He wants to be a famous cartoonist because he likes drawing cartoons. 2. He wants to be a famous professor because he likes teaching others and he likes learning from books. 3. He wants to be an architect because he likes drawing buildings. 4. He wants
asked by rfvv 
math
Toby is making a scale model of the battlefield at Fredericksburg. The area he wants to model measures about 11 mi by 7.5mi. He plans to put the model on a 3.25 ft by 3.25ft square table. On each side of the model he wants to leave at least 3 inches
asked by greg 
math
1) Write a translation rule that maps point D(7, –3) onto point D'(2, 5). Note: PLEASE ANSWER, NEAT & CORRECT PLEASE AND THANK YOU!! =) :) AND EXPLAIN IT GOOD STEP BY STEP, PLEASE. :)
asked by !!!Please Answer!! NOW 
Math
A kite is being flown at a height of 300 ft, and the wind carries the kite horizontally away at a rate of 25ft/sec. How fast must the string be let out when the kite is 500ft away?
asked by Peggy 
Math
A spherical balloon is inflated with helium at the rate of 100pi ft ^3/min. How fast is the ballon's radius increasing at the instant the radius is 5ft.?
asked by Peggy 
physics
As shown in the figure below, a 2.25kg block is released from rest on a ramp of height h. When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch
asked by Diego 
pre calculus
For a given right triangle, side a = 490 feet and side b = 960 feet. What is the measure of angle B to the nearest degree?
asked by Kelsey 
Calculus: Help !
The demand function for a certain brand of blank digital camcorder tapes is given by p=−0.02x^2−0.1x+24 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers'
asked by Ali 
Math [Consumer Surplus]
The demand function for a certain brand of blank digital camcorder tapes is given by p=−0.02x^2−0.1x+24 where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers'
asked by Ali 
JHU
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2
asked by Anzeeel 
chem
a.)How many moles of NaOH are required to prepare 2.00L od 0.380M solution? answer is 0.760 mole of NaOH (mole/l * 2.00L) b.)What will be the molarity of a solution if 3.50 g of KOH are dissolved in water to make 150.0 mL of solution? answer is 0.52 M KOH
asked by Angel Locsin 
physics
Block a is moving with a certain acceleration along a frictionless horizontal surface. When a second block B is placed on top of block A, the acceleration of the combined block drops to 1/5 the original value. What is the ratio of the mass of A to the mass
asked by maihul 
physics
A horizontal 790N merrygoround of radius 1.30 m is started from rest by a constant horizontal force of 50 N applied tangentially to the merrygoround. Find the kinetic energy of the merrygoround after 2.0 s. (Assume it is a solid cylinder.) J
asked by monic 
physics
In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 13.0 oC. The temperature at the inside surface of the wall is 21.1 oC. The wall is 0.19 m thick and has an area of 8.3 m2. Assume that one kilowatt
asked by Redgy22 
math
The management of Ditton Industries has determined that the daily marginal revenue function associated with selling x units of their deluxe toaster ovens is given by the following, where R '(x) is measured in dollars/unit. (a) Find the daily total revenue
asked by Ashton 
Econ
If a pure monopolist can price discriminate by separating buyers into two or more groups: A.the marginal revenue curve and the total revenue curve will now coincide. B.the marginal revenue curve will now shift to a position above the demand curve. C.the
asked by Brandon 
literary
Walt Whitman's writing style can best be described as
asked by Anonymous 
8th grade math
Answer the following question in your discussion group: Sometimes people say “Give 110% of your effort.” Is it possible to give 110% of your effort? Is there ever a situation where you might have a percent over 100? If no, explain why. If yes, give a
asked by Destiny 
Chemistry
Is lead nonpolar covalent, polar covalent, ionic, network, or metallic and why?
asked by KnowsNothing 
sat essay
Assignment: Should heroes be defined as people who say what they think when we ourselves lack the courage to say it? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from
asked by Anon 
Physics HELP!!
A loudspeaker is placed between two observers who are 113m apart, along the line connecting them. If one observer records a sound level of 51.8dB and the other records a sound level of 75.8dB, how far is the speaker from each observer? Enter the longest
asked by Angie 
Physics HELP!!
Sound enters the ear travels through the auditory canal and reaches the ear drum, The auditory canal is approximately a tube open at only one end. The other end is closed by the eardrum. A typical length for the auditory canal in an adult is about 2.775
asked by rory 
Math
how do i figure out this equation? Joy knits a square blanket that has an area of 1,500 square inches. What is the approximate length of each side of the blanket? HELP !! Ms Sue! a 16 in b 27in 39 in 42 in i don't understand how to solve this!
asked by E.M 
Math
If A represents the number of apples purchased at 15 cents each, and B represents the number of bananas purchased at 10 cents each, which of the following represents the total value of the purchases in cents? a) A+B b) 25(A+B) c)10A+15B d) 15A+10B
asked by Andy 
Economics
Your pay stub deducts money for FICA. What does this mean? A. Money is being withheld for personal exemptions and deductions. B. Money is being withheld for excise and estate taxes. C. Money is being withheld to fund Social Security and Medicare. D. Money
asked by bob 
Physics
A 17kg child slides down a 2.7m high playground slide. She starts from rest, and her speed at the bottom is 1.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?
asked by Joe 
physics
a 150N boy rides a 60N bicycle a total of 200m. The frictional force against forward motion bicycle is 35N. How much work does boy do?
asked by michael 
Math
Water is flowing at the rate of 50m^3/min from a concrete conical reservoir of base radius 45m and height 6m. How fast is is the water level falling when the water is 5m deep?
asked by Peggy 
pre calculus
For a given right triangle, angle A = 61± and side b = 39 feet. What is the length of side c to the nearest foot?
asked by Kelsey 
math
Magnus purchased a car for $35,865. It depreciates about 3.6% each year. What is the value of the car after ten years?
asked by kelsey 
ALG2! WORD PROBLEM!very important!!
There are two adults and three children (under the age of 12). They qualify for a special family rate of $174.45. The clerk tells them that a child's ticket always costs $11 less than an adult's ticket. How much is each adult ticket and how much is each
asked by tyneisha 
physics
If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed to take a 105m radius curve banked at 13.0°. km/h
asked by HELP!!! 
Physics
A bungee jumper, whose mass is 81 kg, jumps from a tall platform. After reaching his lowest point, he continues to oscillate up and down, reaching the low point two more times in 8.9 s. Ignoring air resistance and assuming that the bungee cord is an ideal
asked by Elizabeth 
Physical Chemistry
Evaluate (dS/dV)T for a van der Waals gas and a perfect gas
asked by Lawrence 
precalculus
Solve the given equation. (Enter your answers as a commaseparated list. Let k be any integer. tan θ = − sqrt 3/3
asked by amaa 
physics
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find
asked by monic 
Physics
Two loudspeakers emit sound waves along the xaxis. The sound has maximum intensity when the speakers are 35.9cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 109.1cm. What is the
asked by joane 
math
Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of $5 per bottle. However, the profit from each bottle beyond 9600 drops by $0.0002 for each additional bottle sold. Assuming at
asked by shannon 
physics
a playground slide is a place inclined at 48 to the horizontal. a child of mass 25 kg slides down the slide for 4m. calculate the potential energy lost by the child
asked by blah 
chemistry
Reaction: Na2CO3 + 2 HCl > 2 NaCl + CO2 + H2o How many grams of NaCl can be produced from the reaction of 1.35g of Na2CO3 with 125mL of 0.265 M HCl?
asked by Jo 
math
A drawer contains exactly 5 red socks, 8 blue socks, 10 while socks, 12 green socks , and 7 yellow socks. Find the least number of socks to be chosen which will guarantee that there will be at least seven socks of the same color.
asked by sally 
Math
A jar of marbles is half red, one third green and the rest blue. If eight marbles are green how many are blue?
asked by Jennifer DeMain 
accounting
PA114 Comparing Stock and Cash Dividends [LO2, LO3, LO4] Ritz Company had the following stock outstanding and Retained earnings at December 31, 2010: Common stock (par $1; outstanding, 500,000 shares) $ 500,000 Preferred stock, 8% (par $10; outstanding,
asked by Anonymous 
physics
A hydraulic brake system is shown. The area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443. How large
asked by michelle 
chemistry
Reaction: CaCO3 + 2 HCl > CaCl2 + CO2 + H2O Calculate the molarity of hydrochloric acid solution if an initial mass of 4.568g of CaCO3 was reacted with 25.0mL of the acid and 2.678g of CaCO3 remain after the reaction is complete.
asked by Jody 
pre calculus
For a given right triangle, side a = 76.4 feet and side b = 39.3 feet. What is the length of side c to the nearest tenth of a foot?
asked by Kelsey 
Precalculus
invests 7000 for 1 year part at 5% part at 11% and the remainder at 13% total amount of income from these investments was $774. The amount of money invested at 13% was $1200 more than the amounts invested at 5% and 11% combined find the amount invested at
asked by Joanna 
CHEMISTRY
Use the Nernst equation and data from Appendix D to calculate Ecell for each of the following cells. Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4. (a) Mn(s)  Mn2+(0.11) M  Cr3+(0.24 M), Cr2+(0.11 M)  Pt(s)
asked by sabrina 
math
Area of the four walls of a room is 108 m2. If the height and length of the room are in the ratio of 2 : 5 and the height and breadth in the ratio 4 : 5, then the area, in m2, of the floor of the room is :
asked by maihul 
pre cal
For a given right triangle, angle B = 46± and side c = 30 feet. What is the length of side a to the nearest foot?
asked by Kelsey 
physics
A 2.5m long pole is balanced vertically on it's tip. If it falls over with it's bottom never slipping. Find the speed of the top end of the pole just before it hits the ground.
asked by ashley 
math
Toby is making a scale model of the battlefield at Fredericksburg. The area he wants to model measures about 11 mi by 7.5mi. He plans to put the model on a 3.25 ft by 3.25ft square table. On each side of the model he wants to leave at least 3 inches
asked by greg 
physics
A 280N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? rad/s
asked by monic 
Physics !:(
A carbon dioxide laser is an infrared laser. A CO laser with a cavity length of 48.6cm oscillates in the m=100,000.0 mode. What is the wavelength of the laser beam? b). What is the frequency of the laser beam?
asked by sarah 
pre calculus
For a given right triangle, side a = 400 feet and side b = 900 feet.What is the measure of angle A to the nearest degree?
asked by Kelsey 
PHYSICS  PLEASE HELP
Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A
asked by Anonymous 
English
1. At school, I enjoy chatting with my close friends. 2. At school, I enjoy cleaning with other classmates. 3. At school, I enjoy playing soccer in the playground. 4. At school, I enjoy eating cookies at the school shop. 5. At school, I enjoy playing
asked by rfvv 
physics
An object is projected upward from the surface of the earth with an initial speed of 2 km/s. The acceleration of gravity is 9.81 m/s^2. Find the maximum height it reaches. Answer in units of km.
asked by michelle 
physics
A 0.330kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a 29.5N/m force constant that is at its equilibrium length. A 0.0600kg wad of PlayDoh is thrown horizontally at the block with a speed
asked by HELP!!! 
Physics
A small ball is attached to one end of a spring that has an unstrained length of 0.202 m. The spring is held by the other end, and the ball is whirled around in a horizontal circle at a speed of 3.18 m/s. The spring remains nearly parallel to the ground
asked by Elizabeth 
math
Solve the proportion using cross products. 20 Miles 15 Miles ________ = __________ 50 Miles h Hours Please Answer!!!!
asked by !!PLEASE ANSWER!!! 
Math
If a 32 ft rope is cut into two sections with one section 7 times as long as the other section, how long is the shorter piece?
asked by Chely 
pre calculus
For a given right triangle, angle B = 46 degrees and side c = 30 feet.What is the measure of angle A to the nearest degree?
asked by Kelsey 
math
Calculate the interest earned on a savings account with $900.00 that is invested at 4% annual simple interest for 5 years?
asked by !!PLEASE ANSWER!!! now plzzz 
Chemistry
If saturated solution of barium chloride at 30 degree Celsius contains 150g water how much additional barium chloride can be dissolved by heating it to 60 degree Celsius? 30 degrees Celsius = 38.2 60 degrees Celsius = 46.6
asked by Emily 
math
A number is divided by 2. If 16 is added to the quotient you get 20
asked by marley 
Physics
A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?
asked by Joe 
Chemistry
Lead(II) oxide from an ore can be reduced to elemental lead by heating in a furnace with carbon. PbO(s) + C(s)= Pb(l) + CO(g) Calculate the expected yield of lead if 90.0 kg of lead oxide is heated with 90.0 kg of carbon.
asked by Jack 
math
There were 20% more boys than girls in a swimming club. After 50 girls left, there were twice as many boys as girls in the club. How many boys were there in the club?
asked by jane 
physics
A 25 g bullet is fired from a gun into a 1.35 kg block of wood initially at rest. (The bullet sticks in the wood). The wood is driven 9.5 m across a horizontal surface with coefficient of friciton 0.25. Find the speed of the bullet just before impact.
asked by ashley 
Physicsrain velocity to bike
Rain falls vertically downward with a velocity of 2.4m/s. A boy moves at a speed of of 6m/s east in a bicycle with an umbrella. What is the velocity of the rain with the respect to the boy. What angle from horizontal should he hold his umbrella?
asked by Daryl 
physics
A car moves a distance of 200 km. It covers the first half of the distance at speed 40 km/h and second half of the distance by speed v. The average speed is 48 km/h. Find the value of v
asked by maihul 
physics
Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μk = 0.27
asked by Diane 
maths
two adjacent sides of a parallelogram measure 15 cm and 20 cm while the diagonal opposite their common vertex measure 25 cm.find the area of he parallelogram.
asked by aditya chaturvedi 
math
Find the vertices, foci, and eccentricity of the ellipse. 64x^2 + 81y^2 = 5184
asked by amaa 
20 question please check my answers
1. A sickness resulting from eating food that is not safe to eat emptycalorie foods nutrition foodborne illness nutrient density 2. A nutrient that helps control the amount of fluid in your body sodium calorie protein nutrition 3. A measure of nutrient
asked by retired and broke 
Physics
A 0.56kg 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 
pre calculus
For a given right triangle, angle A = 61± and side b = 39 feet. What is the length of side a to the nearest foot?
asked by Kelsey 
SAT Essay
Assignment: Should heroes be defined as people who say what they think when we ourselves lack the courage to say it? Plan and write an essay in which you develop your point of view on this issue. Support your position with reasoning and examples taken from
asked by Anon 
accounting
PA114 Comparing Stock and Cash Dividends [LO2, LO3, LO4] Ritz Company had the following stock outstanding and Retained earnings at December 31, 2010: Common stock (par $1; outstanding, 500,000 shares) $ 500,000 Preferred stock, 8% (par $10; outstanding,
asked by Anonymous 
physics
A star the size of the sun has a mass 8 times as great. It rotates on its axis once every 12 days. It then collapses into a neutron star of radius 10km, losing three quarters of its mass in the process. How long does it take to rotate once after collapse?
asked by ashley 
PHYSICS
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 8.31 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect
asked by Ame 
Physics
A loudspeaker diaphragm is producing a sound for 2.0 s by moving back and forth in a simple harmonic motion. The angular frequency of the motion is 8.55 104 rad/s. How many times does the diaphragm move back and forth?
asked by Elizabeth 
maths
A girl buys 9 apples for Rs.9.60 and sells that at 11 for Rs. 12. What does she gain or loss.
asked by maihul 
Physics
A 71.4cm long tube has a 71.4cm long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As the insert is slowly pulled out, the sound from the tuning fork creates standing waves in the tube when the total length L is
asked by Angie 
physics
in ydse, two parallel slits are made 1mm apart and a screen is placed 1m away. what is the fringe seperation when blue green light of wavelength 500 nm is used?
asked by maneet 
math
The demand function for a certain brand of CD is given by the following equation where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=0.01x^20.1x+6 Determine the consumers' surplus if
asked by Ashton 
algebra
How long will it take $1400 to double at 12% annual interest compounded quarterly?
asked by Brad 
math
Juan bought a pair of sandals for $110.00. He needs to pay the 8% sales tax. How much will Juan pay in sales tax?
asked by !!PLEASE ANSWER!!! 
algebra
Find the accumulated value of a CD of $20000 for 3 years at an interest of 3.1% if the money is compounded continously.
asked by Brad 
physics
a uniform ladder of mass m and length l leans against fricitonless wall angle theta. If the coefficient of static friction between the ladder and the ground is u, find the formula for the minimun angle such that the ladder won't slip
asked by ashley 
PHYSICS
What causes acid rain? Can you think of a way acid rain could be produced even without industrial pollution? [Hint: Plants produce carbon dioxide, Co2, which reacts with rainwater to produce bicarbonate ions, HCO 3.] Give one reaction that produces acid
asked by Aaa 
math
Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the xaxis
asked by Alexa 
Physics
An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 23.6dB. Assuming a porpoise emits sound at a rate of 0.0359J/s, what is the maximum distance at which the animal will still be
asked by rory 
Chemistry
What is the molarity of a solution prepared by diluting 25.0 mL of 0.412 M magnesium nitrate to a volume of 1.50 L please help!
asked by Ashley 
math
What is the sale price for a pair of shoes that was originally $74.00 and now is 25% off?
asked by !!PLEASE ANSWER!!! now plzzz 
History
How did the compromises made when writing and ratifying the Constitution encourage the development of political factions? Compare and Contrast the effectiveness of Washington’s and Adams’ presidencies in obeying and promoting the Constitution during
asked by Ashley 
Calculus [Finding volume of solid]
Find the volume of the solid formed by rotating the region enclosed by x=0 x=1 y=0 y=4+x^5
asked by Ali 
politics
why did politics fall out of favor? is it now back?
asked by tugba 
math
Find the vertices, foci and eccentricity of the ellipse.Thank you 9x^2 + y^2 = 81
asked by amaa 
physics
Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is μk = 0.27
asked by Diego 
health
2. A nutrient that helps control the amount of fluid in your body sodium calorie protein nutrition I thinks its A
asked by retired and broke 
math
A rectangle has an area about 225m^2. the width is about 40m less than the length. Find the approximate dimensions of the playing surface. use factoring.
asked by claire 
Adult Development and life Assesment
After seeing how she interacts with the little Maltese dog next door, Ellie's parents decide to get her a dog too. Ellie'snew Golden Retriever is much bigger and looks different, but because it is new but very similar, she understand ghow to interact wiyh
asked by Regina 
maths
The difference of compound interest and simple interest on an amount at the rate of 12% per annum for 2 years is Rs. 90/ then the amount will be 
asked by maihul 
General Chemistry
Titration between iodine and thiosulphate. Why starch solution has to be added when the solution just turned pale yellow, but not at the beginning of reaction?
asked by ConfuseChem 
Physics
A copper rod (length = 1.3 m, radius = 3.70 103 m) hangs down from the ceiling. A 8.3kg object is attached to the lower end of the rod. The rod acts as a "spring", and the object oscillates vertically with a small amplitude. Ignoring the rod's mass, find
asked by Elizabeth 
CHEMISTRY
What is oxygen extensive properties?
asked by D 
SAT Essay
Mainly directed to Mr. Pursley and Write Teacher but feel free to critique! Thank you so much. Assignment: Do you think that ease does not challenge us and that we need adversity to help us discover who we are? Plan and write an essay in which you develop
asked by Sanya 
Chemistry
consider 1.0 L of a solution which is 0.55 M HF and 0.2 M NaF (Ka for HF = 7.2 x 104), Calculate the pH of this solution
asked by Chris 
math urgent urgent urgent
1)let f(x) be a polynomial function explian how to use the factor theorem to check if (xc) is a factor of F(x) 2) use synthetic division to factor X^22x^29x+18 completly
asked by zach w 
physics
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 1.053 rad/s2. (a)
asked by heather 
Math
A boat travels 1 km upstream and 1 km back. The time for the round trip is 4 hours. The speed of the stream is 5 km/hr. What is the speed of the boat in still water?
asked by Rilee 
physics
1. During storm roof of house is blown off 2.It is dangerous to stand near the railway track when a train is moving with high speed
asked by Phalguni 
programming logic raptor
1. a.input names of students from the user, terminated by "zzz", 0,0,0, and create a data file grades with records of the following form: student (string), test1 (integer), test2(integer), test3 (integer) b. display the contents of the file grades created
asked by gregg hedley 
Physics Help
A 3.50inch floppy disk in a computer rotates with a period of 2.02E1 s. What is the angular speed of the disk?
asked by Na 
physics
A thin uniform stick having a mass of 0.680 kg and a length of 1.50 m is at rest, hanging vertically from a strong, fixed hinge at the uppermost end of the stick. The stick is free to swing back and forth in an UpDownEastWest plane. Suddenly, the
asked by HALP 
Math
Could someone explain how to graph the following problem? I don't quite understand what "Graph H for 0 ≤ t ≤ 3 and 300 ≤ H ≤ 340" is asking me to do... The National Oceanic and Atmospheric Administration (NOAA) has been measuring atmospheric carbon
asked by anna 
chem
What is the difference between a weak acid and a dilute acid: a strong acid and a concentrated acid? Give an example of each
asked by Vince 11 
college algebra
find functions f anf g so that fog equals H H(x)=ãx^2+17 please show work
asked by confused 
MathII ( Joint and Combined Variation)
1. R varies jointly as S and t. If R=1/6,S=1/8 and T=3, find R when S=2 and T=11. formula: R=KST 2. U varies jointly as L and H and inversely a S. If U=1.8, L=6.4, H=1.5 and S=7.2, find U when L=4.3, H=5.1 and S=2.2. formula: U=KLH/S Please Help!!
asked by jezzaD. 
Calc 1
integrate from 0 to pi/4 (sec^2x)/((1+7tanx)^2)^1/3 integrate form pi^2/36 to pi^2/4 (cos(x^1/2))/(xsin(x^1/2))^1/2 integrate from 0 to pi/3 (tanx)/(2secx)^1/2
asked by Frank 
maths
When two cube of side 12 cm are joined end to end to form a cuboid then the total surface area of cuboid is
asked by maihul 
Physics
An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
asked by Tee 
Calculus
integral (sqrt(100x^2324)/x)dx
asked by Anonymous 
chemistry
Calculate the molarity of a solution containing 58.5mg of NaCl in 2.50mL of solution.
asked by Emmanuel 
history
Do you think that the Korean War was merely a civil war in which the United States supported one side, or should it be considered an international war in which the United States used the United Nations to further its anticommunist policie? Can someone
asked by Jennifer 
Physics
What is the difference between converging and diverging waves? What happens to a converging wave after it has converged?
asked by Raju Singh 
Physics
A source of sound (1140Hz) emits uniformly in all directions. An observer 3.09m from the source measures a sound level of 38.2dB. Calculate the average power output of the source.
asked by Ann 
Physics
A standard man shouting loudly produces a 87.4dB sound at a distance of 7.05m. At what rate does he emit sound energy? Express the result in J/s.
asked by rory 
English
What do you have to do before you go to bed? 1. I have to vacuum the floor of my bedroom 2. I have to make the bed. 3. I have to take out blankets and a pillow from the wardrobe. 4. I have to wash my face and brush teeth. 5. I have to close all the windows
asked by rfvv 
Into. Chemistry
I'm trying to do this precipitation reaction problem, but I don't understand part of it. The question is: Does a precipitate form when aq. soultions of potassium nitrate (KNO3) and sodium iodide (NaI) are mixed? Then it lists the solutions for the two:
asked by Emily 
public speaking
For communication to take place, there has to be: A. transmission of the message. B. medium. C. sharing of meaning. D. absence of noise
asked by Anonymous 
Finance
risk free rate 5.5% market premium 6% beta 0.8 expected dividend $1.00 common stock $25.00 growth 6% bond yeild 6.5% capital struture 25% debt 15% preferred stock 60% common equity tax rate 40% preferred stock price $95 preferred dividend $11. what firm
asked by lora 
Wikipedia
Why do people think Wikipedia is a unreliable source? Please answer.
asked by Anonymous 
English
Which of the sentences below uses italics and quotation marks correctly? “You see,” he said, “there are two versions of the novel Zombie Prom at the bookstore.” “You see” he said, “there are two versions of the novel Zombie Prom at the
asked by Deborah 
chemistry
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 5.591×10−3 M−1s−1. What is the initial rate of reaction in a reactor
asked by maliya 
Adult Development and life Assesment
The training of animals (like teaching dogs to open doors for the disabled) uses principles of psychology. 1. cogntive 2. analytic 3. social 4. behavioral I think it's behavioral
asked by Regina 
Physics
My experiment setup was like this: i48.tinypic. com/14n31pl.jpg FYI, there is sandpaper between the ruler and the wall. I calculated the coefficient of friction to be 0.468. Is that correct? A second question asks that as the hanging weight is moved closer
asked by Jeras 
Calc 1
integrate from 0 to pi/2 (3sinxcosx)/(1+3sin^2x)^1/2
asked by Frank 
science
1.Leeuwenhoek’s invention of the _____ made the development of the cell theory possible. * telescope * microscope * cork * magnified glass 2. Chlorophyll can be found in organelles called______. * amino acids * chloroplasts * Golgi bodies * ribosomes
asked by please answer =)!!!!!! 
7th grade Language Arts Ms. Sue please
Questions 1–2 are based on "Loser." Questions 3–5 correspond to "Friends Forever." 1. What event caused the main character to change? (1 point) his date with Jenny his parents' deaths his strange talent finding the lost boy 2. How did Jenny react
asked by Delilah 
math
im trying to complete this input output table input 0 output blank input 3/2 output 17/6 input 11/4 output blank input 3 output 13/3 input blank output 13/2
asked by chelly 
Algebra
Tanya is 1 year less than three times the age of her sister Jessica. Jessica is five years old. How old is Tanya? Need an equation
asked by Anonymous 
Algebra2
Is this right?! G(x)=x^3+2 ; x=2.1.0,1,2 g(2) ; 2^3+2=6 g(1) ; 1^3+2=1 g(0) ; 0^3+2=2 g(1) ; 1^3+2=3 g(2) ; 2^3+2=10
asked by Unknown 
7th grade language arts Ms. Sue
1. If the following sentence was rewritten to be more specific, which would be the best revision? "It was a privilege and not a right, and you messed it up." (1 point) "It was a privilege and not a right, and you don't have it now." "It was a privilege and
asked by Delilah 
physics
how much would a stationary vehicle have to accelerate in order for it to catch up to another vehicle traveling 74 miles per hour in a distance of .5 miles? what would its final speed be?
asked by kelso 
healthcare commumication
What are the advantages and disadvantages of using traditional, electronic, and social media for health care communication What are the effects of HIPAA and other regulations on the use of these media for health care communication
asked by james 
sslope interception form
write slope interception form the equation of the line thay passes through (0,2) and is perpendicular to the line 3y2x=5
asked by elizabeth 
Chemistry
Your xray lab has a monochromator consisting of a single crystal of nickel cut so that the (001) plane lies in the cube face. At what angle (in degrees) should the cube face be tilted with respect to the incident beam in order to select radiation with a
asked by Roxy333 
Advance Accounting
On January 1, 20X1, Parent Company acquired 80% of the common stock of Subsidiary Company for $560,000 On this. date Subsidiary had total owners' equity of $540,000, including retained earnings of $240,000. During 20X1, Subsidiary had net income of $60,000
asked by carol 
math
the circumference of a circle is 4 inches. Find the radius and area..
asked by eddie 
Physics
An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
asked by Owen 
physics
Heat Q flows spontaneously from a reservoir at 481 K into a reservoir at 298 K. Because of the spontaneous flow, 2760 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 298 K and a reservoir at 249 K. Find
asked by Redgy22 
Physics
An underwater micriphone is used to record sounds emitted by porpoises. The minimum intensity level the instrument can record is 23.6dB. Assuming a porpoise emits sound at a rate of 0.0359J/s, what is the maximum distance at which the animal will still be
asked by rory 
math
Find the area of the region under the graph of the function f on the interval [4, 10]. f(x)=10x5 ? square units
asked by Ashton 
math
Of the 85 seventh graders, 27 are going on the class field trip. What percent of the seventh graders are going on the field trip?
asked by !!PLEASE ANSWER!!! 
programming
How to convert VB2008 project in Windows Application (*.exe file)?
asked by Gene 
math
Write the percent 82.33% as a decimal.
asked by !!PLEASE ANSWER!!! now plzzz 
math
If f(a) = (64a2)/a for all nonzero a, then f(2) = a
asked by Anonymous 
CHEMISTRY
Use the Nernst equation to calculate Ecell for each of the following cells. Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4. (a) Mn(s)  Mn2+(0.11) M  Cr3+(0.24 M), Cr2+(0.11 M)  Pt(s) ____________ (b) Mg(s) 
asked by sabrina: 
chem
What is the difference between a weak acid and a dilute acid: a strong acid and a concentrated acid? Give an example of each
asked by Vince 11 
math
A motorist travelling at a steady speed of 120km/h covers a section of the highway in 30min. After a speed limit is imposed he finds that when travelling at the maximum speed allowed he takes 20 min. longer than before to cover the same section. Calculate
asked by Lindsay 
math
(x3)/(6)(7)/(15)≤(3x1)/(10)
asked by Brennan 
English
What does the quote, ""The world is not interested in what we do for a living. What they are interested in is what we have to offer freely  hope, strength, love and the power to make a difference!" mean?
asked by Emma 
PUBLIC RELATION
Can someone tell me what is the differences between public relation and legal ethics? i know there is, lawyer practise in court of aw where there is fairness and equal representation while PR work in court of opinion. Lawyers advise clients on what they
asked by Taskeen 
chemistry
I need the pre lab anwsers to 22, I have been studying for a test and have not finished them
asked by Min 
MIS Nooona MBA
1 I need some ways the company use data on computers before discarding them ? 2 I want three programs that can destroy data on hard disk ? 3 Which method or program is the best for destroying data so that no body can recover it ?
asked by hanaa 
AP Physics
A flagpole is to be installed on the front of an office building as shown below. The pole itself weighs 150 N and is 2 meters long. The support wire is attached at a 60º angle at a point 0.5 meters from the building. A. Find the value of the tension in
asked by Shadman 
Math (Calculus)
Use implicit differentiation to find the slope of the tangent line to the curve y/(x–9y)=x^6–2 at the point (1,1/8). Can someone please help me? I don't understand
asked by Alex 
math
Find the vertices, foci, and eccentricity of the ellipse. Thank you. x^2/16 + y^2/25 = 1
asked by amaa 
health
1. A sickness resulting from eating food that is not safe to eat emptycalorie foods nutrition foodborne illness nutrient density
asked by retired and broke 
college algebra
write the expression as a single logarithm 1. In(x/x*2)+In(x+2/x)In(x^24) solve the following logarithmic equation. 2. log_9(x2)+log_9(x+1)=2 what is the exact solution? What is the decimal approximation for the solution when rounded three decimal
asked by confusedtwo questions please help/steve please 
maths
The perimeter of the base of a cylinder is as same as the perimeter of a square whose one side is 11 cm. If the volume is 98π cm3, the height of the cylinder will be :
asked by maihul 
Analytical Chemistry
How many mg of X is contained in 25 ml of a solution giving an absorbance of 0.250 at 400 nm when measured with a 1 cm cell ?
asked by AREEJ 
Analytical Chemistry
How many mg of X is contained in 25 ml of a solution giving an absorbance of 0.250 at 400 nm when measured with a 1 cm cell ?
asked by AREEJ 
7th grade language arts Ms. Sue please
4. Which of the following is a prepositional phrase? (1 point) he didn't feel safe leaving us behind without supervision 6. Which of the following is not an interjection? (1 point) oops awesome maybe My answers: 4. without supervision 6. maybe
asked by Delilah 
College History
Which of the following was NOT a result of the great migration of blacks in the 1920s? A) Blacks found they someetimes were able to work in jobs that has been closed to them in the South. B) African American consciousness was raised, providing feelings of
asked by Maggie 
math
Write the decimal 0.079 as a percent. Please Answer Correct Please :(
asked by !!PLEASE ANSWER!!! 
Darin
a teacher knows that 80 percent will score no more than 5 points above or below the class average 85 percent on the test which inequality represents the test score of 80 percent of her student.
asked by Jackson 
psychology
Myelination of your brain began before you were born and will continue in a part of your brain until you are at least 70 years old. Because of this process: A your brain cells will not be pruned back and die, so you will learn more. B you will retain the
asked by phia 
math
Walking on the circumference of a circular field a man completes one round in 400 steps. If the length of a step of the man is 66cm., the radius of the field is 
asked by maihul 
business
Post a 150200 word response to the following question: Internet search engines, such as Google and Bing, have a great deal of influence and control over how we access information online. A new term, search neutrality, proposes that search engines should
asked by ariel 
statistics
Working on "Inferences from Dependent Samples" trying to find the standard deviation of the difference data. Differences: 24, 53, 100, 40, 10,71,77,70, 39, 50 n=10 d=51.4 sd=??? (Answer suppose to be 30.8336 but not coming close to this number at all)
asked by HELP 
college algebra
solve the following logarithmic equation. 1. 2log(lower2) (x2) + log(lower2)^2=3 I do not know how to make the 2 by the g on my computer. 2. log(lower729^x) + log(lower27^x) + log(lower3^x) =9 again I do not know how to make the numbers lower case please
asked by confusedtwo questions please help 
Physical Chemistry
Calculate DS if the temperature of 3 moles of an ideal gas with Cv,m = 1.5R is increased from 200 K to 500 K under conditions of (a) constant pressure and (b) constant volume.
asked by Lawrence 
Adult Development and life Assesment
Your instructor asks you to compare positive and negative reinforcement and explain your conslusions in class. what will you report . Positive reinforcement increases the frequency of responses and negative reinforcement decreases the frequency of
asked by Regina 
math
factor, 4x^28xy5y^2
asked by claire 
chemistry
Calculate the density of atoms along [011] in molybdenum (Mo) . Use only the information provided in your class Periodic Table, and express your answer in units of atoms/cm
asked by Roxy333 
Math
The bakery has a full tray of brownies. One customer comes in and buys 1/4 of the tray. The next customer buys 1/5 of what remained in the tray. How much did they buy and how much remains in the tray?
asked by Zhanise 
algebra 2
Write an equation in slopeintercept form for the line that satisfies the following condition. passes through (11, –15) and (16, 5)
asked by Anonymous 
Physics Can you please help me due soon
A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work? _____kg
asked by amela 
physics
If an object wishes to travel 165 km at a rate of 45 mi/hr...how long will it take the object to reach their destination in hours and minutes.
asked by Kaylee 
Math
Mechanics are reboring a 6in deep cylinder to fit a new piston. The machine they are using increases the cylinders radius onethousandths of an inch every 3 min. How rapidly is the cylinder volume increasing when the bore is 3.800 in.?
asked by Peggy 
Chemistry
consider 1.0 L of a solution which is 0.55 M HF and 0.2 M NaF (Ka for HF = 7.2 x 104). Calculate the pH after 0.10 mol of HCl has been added to the original solution. Assume no volume change on addition of HCl. Goes along with the last one i posted, i
asked by Chris 
Physics
An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
asked by Dave 
pre calculus
For a given right triangle, angle B = 46 degrees and side c = 30 feet.What is the length of side b to the nearest foot?
asked by Kelsey 
Physics
When a metal pipe is cut into two pieces, the lowest resonance frequency in one piece is 244Hz and that for the other is 454Hz. What resonant frequency would have been produced by the original length of pipe? (Assume the speed of sound in air is 345 m/s)
asked by Ann 
statistics
Find the zscore for the standard normal distribution where: P(z< a) = 0.2451
asked by Huffette 
yield
what is the theoretical yiled for 0.0300 moles of nitrobenzene if 3 ml was used.
asked by Anonymous 
programming
There are several types of room in a hotel. The HotelRoom Class of Previous Programming Problem was not specific regarding the type of room. Assume that a hotel has guest rooms and meeting rooms. Modify the HotelRoom class as follows: remove the capacity
asked by TOM 
math
Mrs. Jones is building a deck behind her house. Top 28 ft; Right 25 ft; Bottom 4 ft. What is the length of the unlabeled Left side of this deck? Ans. 7 ft. Book's explanation: 〖25〗^2〖24〗^2=625576=49=7 Where did they get 24 from? Thank you for
asked by Edna 
Math
Simplify: (n+4)! / (n+3)! =?
asked by Jay 
CHEMISTRY
cell diagram:H2(g,1atm) Pt Enter part(a), (c) with 2 siginificant digits and part(b) with 3 siginificant digits. Enter scientific notation as 1.23E4. (a) What is Ecell if the unknown solution in the halfcell on the left has pH = 4.94? ____________ (b)
asked by sabrina 
math
While walking outside on a hike 66% or 20, of the students in the class wore jackets. Find the number of students in the entire class.
asked by Now plzzzz!!PLEASE ANSWER!!! now plzzz 
CHEMISTRY
Use the Nernst equation and calculate Ecell for each of the following cells. Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4. (a) Mn(s)  Mn2+(0.11) M  Cr3+(0.24 M), Cr2+(0.11 M)  Pt(s) ____________ (b) Mg(s) 
asked by sabrina:help please with showing steps 
math
for the line segment DE one edpoint is D(3,1) and the midpoint is M (0,4). find the coordinates of endpoint E.
asked by claire 
math
what is the dross product of c/28=49/16
asked by val 
Calculus [rotation of region bounded by curves]
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=3x^2, x=1, y=0 about the xaxis
asked by Ali 
English
Which of the following sentences is punctuated correctly? David wants to go skiing; however he can’t go with you this weekend. David wants to go skiing, however, he can’t go with you this weekend. David wants to go skiing; however, he can’t go with
asked by Deborah 
Math :/
Point E is located at (–2, 2) and point F is located at (4, –6). What is the distance between points E and F? Please help, I have no idea!
asked by Jodi D. 
English
1. He is a member of the swimming club 2. 2. He is a member of the Swimming Club 2. 3. He is a member of Swimming Club 2. 4. He is a member of a swimming club 2. (Which one is correct? There are two swimming clubs here. In this case which expression should
asked by rfvv 
chem
Calculate the H+ ion concentration given the following pH readings: a) 2.00 b) 9.50 c) 10.40 d)125(is this a reasonable question neee help
asked by akira 12 
chem101
Processed cheese must be at a pH of 5.5 to 5.9 to prevent growth of unwanted microorganisms. If a sample comes back with [OH]of 7.76e9 as a control supervisor would you send the cheese back? Justify your answer. My asnswer is no but I don't know how to
asked by akira 12 
chem101
Processed cheese must be at a pH of 5.5 to 5.9 to prevent growth of unwanted microorganisms. If a sample comes back with [OH]of 7.76e9 as a control supervisor would you send the cheese back? Justify your answer. My asnswer is no but I don't know how to
asked by Akira12 
chem101
Calculate the H+ ion concentration given the following pH readings: a) 2.00 b) 9.50 c) 10.40 d)125(is this a reasonable question neee help
asked by Akira12 
Calculus
Find the limit lim x>2 (2x^2 +1)/(x^2 + 6x 4)
asked by Nate 
Algebra 2
Ryan moved into a new house with a 1750 gallon pool and needs to fill it. He can't figure out how to close his pool drain. It fills up in 1458 minutes,but it drains in 2187 1/2 minutes. When will it be full?
asked by Steph 
physics
As shown in the figure below, a stick of length L = 0.330 m and mass m = 0.205 kg is in contact with a rough floor at one end and a frictionless bowling ball (diameter d = 21.50 cm) at some other point such that the angle between the stick and the floor is
asked by HELP!!! 
chemistry
what is cryogenetics
asked by sherry 
Calculus [Finding volume of solid]
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2 y=0 x=3 about the yaxis
asked by Ali 
Calculus
What do they mean about this question below::: Find the length of the portion of the parabola bounding R Would I have to use the arc length formula or some other formula in order to solve this problem
asked by Anonymous 
Math
A rectangle area spans . The length must be 20ft more than the width. What are the dimensions?
asked by Michelle 
social studies
Dr. Skinner is a behaviorist. Your coworker, Terry, asks the good doctor why Baby Herbie gives a happy yell, smacks his lips, and grins every time Terry opens the cookie jar. Dr. Skinner is most likely to answer that Herbie: A is in the oral stage and is
asked by phia 
college algebra, Please help!!
find the domain of the composite function of fog f(x)=x^2+8;g(x)ãx5
asked by confused 
Business
I forgot my class notes and I can;t find this acronym in my book. Can someone please tell me what the acronym C.L.A.S.S. stands for. I looked it up on an acronym website but has way to many. Thanks
asked by Mike 
Use of english
List fifteen differences between common noun and proper noun
asked by Habibat isah 
hvac school
What temp would a fixed volume of gas need to be heated in order to double its pressure if it starts out at 25?
asked by bruce 
math
factor 9900f^2
asked by claire 
math
factor 9900f^2
asked by claire 
Algebra 2..
Simplify. 4i (imaginary number)
asked by Anonymous 
english
innnniytevebcaaasdd phrase, 3 words first 8 letters second two letters third, 9 letter question: what does basketball and hockey have in common?    please answer i need it tomorrow!
asked by mia 
psychology
Dr. Skinner is a behaviorist. Your coworker, Terry, asks the good doctor why Baby Herbie gives a happy yell, smacks his lips, and grins every time Terry opens the cookie jar. Dr. Skinner is most likely to answer that Herbie: A is in the oral stage and is
asked by phia 
Calculus
integral[13,4]sin^2(8x)cos^2(8x)dx
asked by Anonymous 
Economics
Can there be inflation with without an increase in the money supply? How?
asked by Gwen 
CHEMISTRY
2.05 Grams of a liquid vaporized at 80 c in a 1 liter flask and a pressure of 1 atm. what is the molar mass of the gas?
asked by KISHA 
Physics
An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
asked by Joe 
Calculus
Use the substitution x=3tan() to evaluate the indefinite integral 93dx/(x^2sprt(x^2+9))
asked by Anonymous 
Algebra2
Is this right?? 1. f(x)= x5 if x≤1 ; (1)/(x+1) if x>1 f(5) = 55 = 10 f(1) = 15 = 4 f(3) = 1/4
asked by Unknown 
Calculus
integral[7 sqrt 2/2,0]sqrt(49+x^2) dx
asked by Anonymous 
physics
A submarine is patrolling the ocean. Each hour, it descends 25 feet and then ascends 10 feet. At 7:00 AM, it is at a depth of –100 feet. What will its depth be at 11:00 AM?
asked by Abby 
ALG2! WORD PROBLEM!very important!!
You are a student who plans to attend the amusement park for two days. This will be fun! Now it's time to figure out the cost. You won a coupon for 50% off a 1day pass but it cannot be combined with other offers. The amusement park also offers a $5
asked by tyneisha 
Math
What is the best estimate of the measure of: Right triangle, A,B,C, if there are no degrees. Ans. 15 degrees. How do you get this if there are no degrees on the triangle??
asked by Edna 
math
The Football field needs to be cut for the bog game on saturday. If the lawn service cuts 1/3 of the field on tuesday, and 1/8 of the field on thursday, what portion of the field remains to be cut on friday?
asked by Zhanise 
algerbra
the perimeter rectangular pool is 160 meterss . The length of the pool is 20 meters . what is the length ?
asked by Anonymous 
ALG2! WORD PROBLEM!very important!!
A business wants to give each of its employees a free ticket to the amusement park and has budgeted $1200 for tickets. 1. Write and solve an inequality to find the maximum number of 1day, adult tickets that can be bought. When you round your answer,
asked by tyneisha 
Algebra
x^6+x^7/x
asked by Christine 
Health
Depression is treatable in ________ of cases. A. 90% B. 20% C. 80% D. 50%
asked by Ashlee 
Math
Could someone explain what each part of this formula represents? H(t) = 0.058t^2 + 0.41t + 516 + 2.5 sin(2π)(t)
asked by alice 
chemistry
a. what is the effect on the Kc when the temperature of an exothermic reaction is lowered? b. according to Le Chatelier's principle, how is equilibrium in part a established.
asked by Boo Boo 
computers
what part of a presentation slowws you to add charecter data?
asked by angela 
College History
I have quite a few that I couldn't figure out on my assignment. 1) The leading symbol of reforming state governments in rhe early 1900's was A) Theodore Roosevelt B) Woodrow Wilson C) Robert La Follette D) Upton Sinclair 2) Wilson's first dealings with
asked by Maggie 
Macroeconomics
When is a large deficit desirable?
asked by HELP PLEASE!!!! 
math,
4) Jennifer wants to buy a bicycle that costs $310.00. Her parents say Jennifer must raise 30% of the money herself. How much money must Jennifer raise? Answer Please !!!
asked by !!PLEASE ANSWER!!! 
math
6) 15 is 60% of what number?
asked by !!PLEASE ANSWER!!! 
college algebra
I am having to explain how to find the domain and range of a rational function from its graph. Can someone help me to try and put this into simple terms.
asked by confused 
Statistics
What is the appropriate sample size for a confidence interval around the sample mean if you want a margin of error of 0.8 with 95% confidence and a population standard deviation of 12.
asked by Parul 
physics HELP!
The observed wave speed is 20.3 m/s when the suspended mass is m = 3.07 kg. What is the mass per unit length of the string? I keep calculating this out to be .5199 kg/m which i know is wrong! HELP!
asked by Emily 
statistics
How to convert VB2008 project in Windows Application (*.exe file)?
asked by Gene 
English
i need help please on my persuasive speech based on slavery please please help
asked by tonitara 
AP CALCULUS
Using the mean value theorem; F'(x) = f(b)f(a) / ba f(x)=x^28x+3; interval [1,6]
asked by Kasie 
math
Find the amount of sales tax for a television that costs $475.00 at a 7% tax rate?
asked by !!PLEASE ANSWER!!! 
Statistics
Explain how the error term in a repeated measures ANOVA is actually an interaction
asked by nina 
Statistics
Explain how the error term in a repeated measures ANOVA is actually an interaction
asked by nina 
algebra
f(x)=2+5 sketch a graph
asked by Dee 
MATH
Working on "Inferences from Dependent Samples" trying to find the standard deviation of the difference data. Differences: 24, 53, 100, 40, 10,71,77,70, 39, 50 n=10 d=51.4 sd=??? (Answer suppose to be 30.8336 but not coming close to this number at all)
asked by Inferences from Dependent Samples 
Math
There are both white and brown eggs in the refrigerator. The ratio of the number of white eggs to the number of brown eggs is 3/4. Which of the following could be the number of eggs in the refrigerator?
asked by Anonymous 
math
46 is what percent of 280
asked by !!PLEASE ANSWER!!! now plzzz 
CHEMISTRY
Enter part(a), (c) with 2 siginificant digits and part(b) with 3 siginificant digits. Enter scientific notation as 1.23E4. (a) What is Ecell if the unknown solution in the halfcell on the left has pH = 4.94? ____________ (b) What is Ecell if the unknown
asked by sabrina:yes i couldn't post the cell diagram H+ 
Chemistry
not much of a question but more of an appreciation, thanks for helping i was really confused before today
asked by Chris 
Algebra 2 ..
Solve (16)^1/4
asked by Anonymous 
math urgent urgent urgent
perpendicular to line 2x+y=7 contains the point (4,2) the equation of line is
asked by zach w 
psychology statistics
why can we use the same multiple comparison procedures for between subjects, repeated measures, and mixed designs without changing the formulas
asked by nina 
Fraction to decimal question
Is there any way to convert to a decimal if you can't find a denominator that works your way? like 21/34 ? can you explain???
asked by Moby 
Pre Algebra
If you have 256 ft of fence for your yard. The lenth is 12 feet longer than twice the width. What are the dimensions?
asked by Cindy 
Math
Determine the slope and yintercept of the following linear equations.
asked by Milen 
Math
Determine the slope and the yintercept of the following linear equations. 1. y = (3/2)x  4 2. 2x + y  3 = 0
asked by Milen 
English
Which of the items below uses apostrophes correctly? Is this jacket Kevin’s? Wait, I think it’s actually your’s. Is this jacket Kevin’s? Wait, I think it’s actually yours. Is this jacket Kevin’s? Wait, I think its actually yours. I think it is
asked by Deborah 
English
Which of the items below uses apostrophes correctly? Before she could address the invitations, Jessie needed everyone’s addresses. Before she could address the invitations, Jessie needed everyones’ addresses. Before she could address the invitations,
asked by Deborah 
chemistry
The number of moles in 15.39g of C2H6O?
asked by catina 
CHEMISTRY
Co(s) will oxidize Fe(s) while leaving Cu(s) unreacted, please write a balanced equation for the reagent involved?
asked by help 
English
Which of the following sentences is punctuated correctly? Mom thinks we need to arrive by seven o’clock; but I don’t think that’s necessary. We will end up waiting around for the others; that will be boring. I think we should get there at eight
asked by Deborah 
Math
(x)/(3)+(5)/(6)
asked by Brennan 
elementary
i need help making a story with these play,fry,stays,fried,spies,spy,stay,cry spelling words
asked by Latha 
Physics
A boy throws a stone with an initial velocity of 14.6 m/s and it returns to his hand in 3 seconds. What maximum height does the stone reach?
asked by Anonymous 
Algebra2
is this right? 27. h(x)= x3 ; x=0,1,2,3,4,5,6 h(x); 03 =3 h(x); 13=2 h(x); 23=1 h(x); 43=1 h(x); 53=2 h(x); 63=3
asked by Unknown 
Algebra2
Help? f(x)=5 ; x=3,2,1,0,1,2,3
asked by Unknown