Questions Asked on
February 27, 2011

English
Need some advice! What to do the with the class for the first time? I don't know the class and they don't know me. They are not children. The youngest person is 20 and the oldest around 3540 There are 10 of them in the group and they are learning English
asked by tee 
chemistry
how many grams of NaCl (molecular weight 58.5) should be used to prepare 20 liters of a solution containing 154mEq/L?
asked by mary 
Chemistry
Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.
asked by Trudy 
chem
The volume of an adult's stomach ranges from about 50 mL when empty to 1 L when full.If its volume is 500 mL and its contents have a pH of 2, how many moles of H+ does it contain?
asked by Anonymous 
maths
A floor is covered by 800 tiles measuring 10 cm square.How many square tiles of side 8 cm would be needed to cover the same floor?
asked by sweety 
Physics
The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.
asked by Dave 
physics
a skateboarder is skating over a circular bump. she is at the top of the bump and is moving with a speed of 5m/s. Is the normal force exerted on the skateboarder by the bump greater than, less than, or equal to the weight of the skateboarder? explain.
asked by tae 
English
As you know, Anne frequently refers to how much she appreciates and enjoys nature. Why is nature so important to Anne? What does nature represent that she so desires? How do Anne’s passages on nature in the diary affect her mood and affect the mood of
asked by Roxy 
English
Briefly explain Anne’s relationship with her parents. How is her relationship with her father different from her relationship with her mother? What does each relationship tell you about Anne, her values, and her needs? (the book is the diary of a young
asked by Roxy 
Chemistry
Consider the titration of a 35.0mL sample of 0.175 M HBr with 0.200 M KOH. Determine the pH after adding 5.0 mL of base beyond the equivalence point.
asked by Brian 
finance
Adams Enterprises’ noncallable bonds currently sell for $1,120. They have a 15 year maturity, an annual coupon of $85, and a par value of $1,000. What is their yield to maturity?
asked by david 
Physics
A woman pushes a lawn mower with a con stant force of 112 Newtons at an angle of 37degrees with respect to the horizontal. The lawn mower moves at a speed of 20 cm/sec. What is her power output? (1 hp = 746 Watts)
asked by James 
statistics
If I go into an ice cream parlor, and I have the choice of having one of 10 different flavors , with one of 5 different toppings and one of 3 different types of cones, How many times can I come back to this place and get a different ice cream cone
asked by Anonymous 
chemistry
When acetone is added to saturated sodium chloride, the equilibrium shifts toward the right. What is the role of acetone in shifting the equilibrium toward the right? any help would be appreciated. My TA is of no use in explaining our lab experiments.
asked by redgy 
Science (Chemistry)
Assuming gasoline is 100% isooctane, with a density of 0.692g/mL, what mass of carbon dioxide is produced by the combustion of 1.2x10^10 gal of gasoline (the approximate annual consumption of gasoline in the U.S.)?
asked by Jenn 
Physics
An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the ground level.
asked by Lesley 
Physics
Karen has a mass of 52.7 kg as she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a distance of 57.5 m, the longest escalator in the free world. The acceleration of gravity is 9.8 m/s2 . How much work did the
asked by Mike 
college algebra
If an averagesize man with a parachute jumps from an airplane, he will fall 12.5(0.2t  1) + 19t feet in t seconds. How long will it take him to fall 134 feet?
asked by amber 
math
a midwestern music competition awarded 32 ribbons. the number of blue ribbons awarded was 3 less than the number of white ribbons. the number of red ribbons was 2 more than the number of white ribbons. how many of each kind of ribbon was awarded?
asked by victoria 
chemistry
why might you not observe a reaction even though an activity series indicates it should occur?
asked by mel <3 
Math (Trig)
a ferris wheel has a radius of 10m and is one meter above the ground. If the ferris wheel makes 1 revolution every 20 seconds, write an equation that gives the height above the ground of a person on the ferris wheel as a function of time if that person
asked by Meg 
Physics
A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?
asked by Lesley 
APUSH
in the late nineteenth century: how could trusts purchase a senate seat? what were the sympathies of the national government like?
asked by Kayla 
Chemistry
Please check my answers. 1. Using the equations, IO3 +5I + 6H+ > 3I2 + 3H2O C6H8O6 + I2 > C6H6O6 + 2I + 2H+ how many equivalents of IO3 are required to produce enough I2 to oxidize one equivalent of ascorbic acid? Answer: 1IO3 3I2 3C6H8O6 1/3
asked by Sara 
physics still confused.
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Thank you so
asked by Angela here again 
Physics
How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?
asked by Lesley 
statistics
A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following numbers of days of sick leave taken in the past. 0, 1, 4, 1,6, 2. Find and interpret the range
asked by T. 
chem
seawater contains approximately 3.5% NaCl by mass and has a density of 1.02 g/mL. What volume of seawater contains 1.0 g of sodium?
asked by Anonymous 
probability
Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability that two or three of the balls are white
asked by sam 
math
Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability that two or three of the balls are white. (Round your answer to three decimal places.)
asked by Anonymous 
maths
1) The 17th hole at the famous st andrews golf course is 420 m in length.How long will it appear on a plan of the course of scale 1:8000? 2) On a map of scale 1:15000,the distance between the buckingham palace and brixton underground station is 31.4cm.
asked by sweety 
ALGEBRA 1
Cindy will require $15,000 in 2 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 12% compounded continuously, she will have enough for school?
asked by amber 
physics
A phonograph record has an initial angular speed of 37 rev/min. The record slows to 10rev/min in 1.3 s. What is the record’s average angular acceleration during this time interval
asked by Kara 
Chemistry
Calculate the concentration of all species in a 0.15 M KF solution. Ka = 6.4 x 104 for HF.
asked by Brian 
Physics
A 16kg child sits on a 5kg sled and slides down a 143meter, 30degree slope, to the nearest m/s what is his or her speed at the bottom?
asked by James 
Chemistry
Consider a weak acidstrong base titration in which 25.0 mL of 0.100 M acetic acid is titrated with 0.100 M NaOH. a) Calculate the pH after the addition of 3.00mL of NaOH. b) What is the pH of the solution before the addition of NaOH (pKa of acetic
asked by Jon 
Math
A 5 feet long ladder leans against a wall and makes an angle of 65 degrees with the ground. find, to the nearest tenth of a foot, the distance from the wall to the base of the ladder.
asked by Anonymous 
Physics
How much work is needed to lift a 3 kg mass a distance of 0.75 m?
asked by Lesley 
Physics
Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J. Answer in units of m/s.
asked by James 
pre ap physics
** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is uniformly distributed
asked by Angela here again 
physics
if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why doesn't it come to rest after stretching by a distance 'd'; proportional to the weight of the mass, when the spring's restoring
asked by ashley  HELP PLEASEE!!! 
chemistry
The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a short paragraph discussing your evidence for this rule. Include in your discussion where you think this rule works best and
asked by j 
geometry
A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces.
asked by shannon 
Cheistry
When acetone is added to saturated sodium chloride, the equilibrium shifts toward the right. What is the role of acetone in shifting the equilibrium toward the right? any help would be appreciated. My TA is of no use in explaining our lab experiments.
asked by redgy 
Geometric
1) The sum of last three terms of GP having n terms is 1024 time the sume of first 3 terms of GP. If 3rd term is 5. Find the last term. 2) The sum of the first eight terms of a GP is five times the sum of the first four terms. Find the common ratio.
asked by Sniper 
CHEMISTRY
Consider the reaction shown below. 4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol PH3 is consumed in a 1.9L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
asked by Mattie 
potential energy
An ideal spring has a spring constant k = 20.0 N/m. What is the amount of work that must be done to stretch the spring 0.70 m from its relaxed length?
asked by henry287 
Physics
Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 66 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera tion of the Earth during the student’s fall.
asked by Carrie 
Calc: Difference quotients
"Use difference quotients with delta(x)=0.1 and delta(y)=0.1 to estimate fx(1,3) and fy(1,3) where f(x,y)=e^(x)sin(y)." I don't know how to solve this problem. Could someone walk me through it? Thank you so much!
asked by Brittany 
Physics
A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 8 m/s, find the height it was released from.
asked by Lesley 
Statistics and Probability
Suppose a basketball player successfully makes 70% of the free throw shots they attempt. Let X represent the number of successful attempts in 120 independent attempted free throws. (A) What is the true probability distribution of X? (B) Find the mean and
asked by Adam 
Yr 10 PE
I don't seem to understand this question can you please paraphrase this. Task Outline: Outline the purpose of ONE health promotion initiative related to road safety, assess the effectiveness of this initiative and justify funding for road safety
asked by Emily 
Permutation
In how many ways can 5 boys and 5 girls be seated around a table so that no 2 boys are adjacent?
asked by Rey 
Missouri
Calculate the mass of 2.50 x 104 molecules of nitrogen gas?
asked by John 
Chemistry
Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) > Cu(NO3)2(aq) + 2Ag(s)
asked by Carly 
Physics
A billiard ball of mass m = 0.150 kg hits the cushion of a billiard table at an angle of θ1 = 60.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 47.0° and a speed of v2 = 2.20 m/s. a) What is the magnitude of the change in momentum
asked by Em 
Math
The number of calls received by a car towing service averages 14.4 per day (per 24 hour period). After finding the mean number of calls per hour, find the probability that in a randomly selected hour the number of calls is 0
asked by Katie 
geometrY
to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same point. Dave is 6 feet 4 inches tall and his shadow is 15 feet long. If he is standing 66 feet away from the tree, what is the
asked by shannon 
Physics
Part 1 You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 10000 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.47 m and the cannon is aimed at a
asked by Dave 
managerial accounting
Department A had 10,000 units in work in process that were 30% converted at the beginning of the period at a cost of $10,000. During the period, 15,000 units of direct materials were added at a cost of $60,000, 16,000 units were completed, and 9,000 units
asked by Crystal 
physic
A 1.0kg steel ball and a 2.0m cord of negligible mass makeup a simple pendulum that can pivot without friction about thepoint O, as in the picture below. This pendulum isreleased from rest in a horizontal position, and when the ball isat its lowest point
asked by Anonymous 
Physics
Rosie (mass 58 kg) pushes a box with a horizontal force of 120 N (26.976 lb) at a speed 25 m/min. What is Rosie’s power output? Answer in units of W
asked by Dave 
Algebra
Solve the problem. A salesperson gets a commission of $600 for the first $10,000 of sales, and then $300 for each additional $10,000 or partial of sales. Let S(x) represent the commission on x dollars of sales. Find the value of S(45,000)
asked by brad 
geometry
for that some problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. arn't you solving two parts because the board was cut in two?
asked by shannon 
Ap Chemistry
explain the difference in boiling points of acetone and 1 proponol. (proponol higher) also explain the difference in water solubility of chloroethane and acetone. (acetone is soluble but not chloroethane)
asked by z 
Math
The volume of a cylinder is 1256 meters. The height is 13 meters. Diameter is x. What is the diameter?
asked by MathLover 
advance functions
Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx3 and X^33mx^2+2nx+4 are both divisible by x2. I am so lost, i do not know how to start this problem! please help i have a test soon!
asked by rani 
MATH grade 12
Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx3 and X^33mx^2+2nx+4 are both divisible by x2. I am so lost, i do not know how to start this problem! please help i have a test soon!
asked by rani 
physics
AHHHHHH Help!! Mass on string of unknown length oscillates witha period of 6.0s What if string length is doubled? amplitude dbl?
asked by pam 
Physics
Part 1 You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 10000 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.47 m and the cannon is aimed at a
asked by Mike 
science
A ball is thrown horizontally from a cliff a 8 m/s. How fast is it moving 2 s later?
asked by Brenda 
phsyics
Light enters a plate of borosilicate crown glass at an angle of 40.2 degrees with respect to the nor mal to the airglass surface. If the index of refraction of the glass is 1.52, find the angle made by the refracted beam with the normal. Answer in
asked by leslie 
math
an unbiased coin is tossed 3 times. find the probability that the coin lands heads exactly once.
asked by Anonymous 
statistics
The population of SAT scores forms a normal distribution with a mean of µ =500 and a standard deviation of Ïƒ =100. If the average SAT score calculated for a sample of n = 25 students, a. What is the probability that the sample mean will be greater than
asked by T 
Physics
Physics question on identify the reaction? I am having trouble with the question a, b, and c in this physics problem: One or more external forces are exerted on each object enclosed in a dashed box shown in the figure below. Identify the reaction to each
asked by Lin 
Reading
The Great Gatsby Movie Discussion Questions? Compare and contrast Gatsby's social class with that of Tom and Daisy Buchanan. How does geography contribute to the definintion of social class in The Great Gatsby? What part of his past is Gatsby trying to
asked by Erin 
Directional derivative
"Find the directional derivative fu(1,2) for the function f with u = (3i4j)/5 for f(x,y)= x^(2)  y^(2)." Thank you!
asked by Anonymous 
Physics
A student uses a spring to launch a marble vertically in the air. The mass of the marble is 0.002 kg and when the spring is stretched 0.05 m it exerts a force of 10 N. What is the maximum height the marble can reach?
asked by Lesley 
physics
A(n) 0.163 kg baseball is thrown with a speed of 9.37 m/s. It is hit straight back at the pitcher with a final speed of 16.7 m/s. What is the magnitude of the impulse de livered to the ball? Answer in units of kg · m/s.
asked by Maria 
math
Write an expression for the sum of the squares of two consecutive integers. (Use x for the integer.) 1 Simplify that expression. 2
asked by jannette 
Physics
A student uses a spring with a spring constant of 130 N/m in his projectile apparatus. When 56 J of potential energy is required to launch the projectile to a certain height, what is the compression in the spring?
asked by Lesley 
Chemistry
The pH of a 0.065 M solution of a weak base is 11.70. What is the value of Kb for this base?
asked by Brian 
English
In an entry dated July 15, 1944, Anne writes the following: …in spite of everything I still believe that people are really good at heart. I simply can’t build my hopes on a foundation consisting of confusion, misery, and death. I see the world
asked by Roxy 
English
I am trying to analyze Wendi Kaufman's "Helen on EightySixth Street." I do not understand what Vita's mother means when she says "Truth is beauty and beauty is truth..." Please explain the meaning of this quote.
asked by Melissa 
Chemistry
you have75.0ml of 2.5 M Solution of Na2CrO4(aq). You also have 125ml of a 1.74M solution of AgNO3(aq)Calculate the concentration of NO3 when the two solutions are added together
asked by Logan 
Physics
An m = 6.80kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of
asked by Haley 
math
A rectangle is 4 inches wide by 7 inches long. When the length and width are increased by the same amount, the area is incresed by 26 square inches. What are the dimensions of the new rectangle?
asked by Gabi 
Biochem  Diabetes
Type 1 diabetic injected insufficient insulin so her body can’t use glucose in blood. Blood glucose is 38 mM (normal value = 3.35.8 mM). To adjust osmolality, she increased urine output = dehydration. Should she be treated with water? The answer is NO
asked by Lena 
Laws of Motion
A student stands on a scale in an elevator that is accelerating at 2.8m/s^2. If the student has a mass of 94 kg, to the nearest newton what is the scale reading?
asked by James 
chemistry
If 5.00 g of steam (H2O)(g) at 100 C condenses to liquid water (H2O)(l) that is cooled to 50.0 C, how much heat is leberated in calories and kilocalories?
asked by Celeste 
Math(Urgent)
Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation So the objective = f(x)=xy and the
asked by Hannah 
Math
Find the unit price and tell which is the better buy: Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4 packs for $2.98.
asked by Sammy 
Chemistry
Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.
asked by Ariel 
ap chem
ok, i'm given: Ethylene Glycol C2H6O2 is the main ingredient in antifreeze. density of pure EG: 1.132 g/mL Antifreeze is 32% by volume EG I have to find: Volume of Eg in 1 L Mass of Eg in 1 L & the Volume of "solvent" in 1 L Can someone help me? and give
asked by dylan 
chemistry
describe an alternative method to prepare a 0.2M potassium phosphate buffer using KH2PO4 and KOH
asked by kabelo 
Physics
The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.
asked by Mike 
Calc
The directional derivative of z = f(x,y) at (2,1) in the direction toward the point (1,3) is 2/sqrt(5), and the directional derivative in the direction toward the point (5,5) is 1. Compute dz/dx and dz/dy at (2,1). I have no idea how to solve this
asked by Dani 
science
what could you infer about the area where you find pecten fossils?
asked by morgan 
Chemistry
If each of the salts listed in A through E were dissolved in water to make a 0.1 M solution, which solution would have the lowest pH? a. NaNO2 b. NaF c. AlCl3 d. KNO3 e. Na3PO4
asked by Brian 
Chemistry
Calculate the pH of a solution that results from the mixture of 50.0 mL of 0.15 M HCOOH with 75.0 mL of 0.13 M HCOONa. Now, don't forget these solutions are being mixed and you haven't accounted for that yet in the concentrations! Ka for HCOOH is 1.8 x
asked by Brian 
Gradient vectors
"Find the gradient of the given function: z = xe^(y). Assume the variables are restricted to a domain on which the function is defined." Thanks for the help!
asked by Anonymous 
college physics
A ball of mass 0.70 kg moving with speed of 1.0 m/!@#$%^&s a wall and bounces back with the same speed in the opposite direction. What is the change in the ball's kinetic energy?
asked by craig45 
Chemistry
Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.
asked by Ariel 
Physics
When a rattlesnake strikes, its head accelerates from rest to a speed of 30 m/s in 0.64 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rat tlesnake need to accelerate
asked by Mike 
Dynamics
A boy of mass m takes a running start and jumps on his sled at position 1. He leaves the ground at position 2 and lands in deep snow at a distance of b = 25 ft. How fast was he going at position 1?
asked by Demar 
geometry
For that problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. when answering the question why was it 3/5=x/12? where did the 5 come from?
asked by shannon 
Permutations/Combinations
In how many ways can 5 men and 5 women be seated at a round table if two men must not sit together?
asked by Newbie 
physics
Each Steel Rail is 8.0 m long and has a cross sectional area of .0025msquared. on a hot day, each rail thermally expans as musch as 3.0 X 10EE3. if there were no gaps between the rails, what would be the force on the ends of each rail?
asked by Roxy 
Math
This problem deals with TRADE & CASH DISCOUNTS. PLEASE HELP solving some questions. Here is some information in regards to the questions. THANK YOU! Misuse and abuse of trade discounts infringe on fair trade laws and can cost companies stiff fines and
asked by April 
Physics  Please Help
An m = 6.80kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of
asked by Em 
chemistry
In a reaction involving the bromination of acetone, the following initial concentraions were present in the reaction mixture. acetone (0.8mol/L), H+ (0.2 mol/L), Br2 (0.004 mol/L) At 25 degrees C, it took 240s before the colour of Br2 disappeared. If the
asked by Mal 
math
what is 4 over 100 in simplest form
asked by Olivia 
Laws of Motion
Two skaters are in the exact center of a circular frozen pond. Skater 1 pushes skater 2 off with a force of 100 N for 1.4 seconds. If skater 1 has a mass of 30 kg and skater 2 has a mass of 74 kg, a) what is the relative velocity (v1  v2) after the push
asked by James 
Chemistry  physical, chemical and nuclear process
A healthy human body maintains a temperature of about 37.00C. Explain how physical, chemical and nuclear processes all contribute, directly or indirectly, to keeping the human body at a constant temperature.
asked by Farah 
Math
A marble is 12mm in diameter. What is the smallest height box that is 96mm square that can hold 200 marbles and still have the lid fit on the box without interference?
asked by Sally 
Physics
How much work must be done to accelerate an 8x105 kg train: a) from 10 m/s to 15 m/s; b) from 15 m/s to 20 m/s; c) to a stop an initial speed of 20 m/s?
asked by Lesley 
physics
A car accelerates from 25km/hr to 55km/hr in 30 seconds. What is its acceleration?
asked by Anonymous 
college
At which point in the criminal process does the right to counsel end?
asked by ev 
math
if x,y,z represents consecutive terms in an Arithmetic progression, prove that y is = (x+z)/2
asked by shakira.shakira 
psychology
Sona is trying to put together a puzzle that is too difficult for her to complete alone. If the puzzle is within Sona’s zone of proximal development, then she (Points : 1) is likely to complete it if she has assistance. is likely to become frustrated
asked by april 
Calc
The temperature at any point in the plane is given by function f(x,y) = 100/(x^(2)+y^(2)+1). Find a direction at the point (3,2) in which the temperature does not increase or decrease. Help, please? Thank you.
asked by Dani 
math
Sara has gone to work for 60 days. On 39 of those days she arrived at work before 8:30A.M. On the rest of the days she arrived after 8:30A.M What is the experimental probability that she will arrive at work after 8:30A.M the next day she goes to work
asked by Trina 
math
A druggist wishes to select three brands of aspirin to sell in his store. He has five major brands to choose from: A, B, C, D and E. If he selects the three brands at random, what is the probability that he will select the following? (a) brand B (b) brands
asked by sam 
Chemistry
Please help me with these! Thanks :) Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a
asked by Amanda 
Chemistry
What? If anything, is wrong with the following sets of quantum numbers. a. n = 2, l = 2, ml = 0, ms = +1/2 b. n = 0, l = 0, ml = 0, ms = 1/2 c. n = 3, l = 2, ml = 2, ms = +1/2 d. n = 4, l = 2, ml = 2, ms = 1/2
asked by Kelly 
Stoichiometry Problems
How many grams of phosphorus can be obtained from the decomposition pf 45kg of POCL3. 2 POCL3 (> 2P + 3Cl2 + O2
asked by Ray 
Physics
In the 1950’s, an experimental train that had a mass of 41000 kg was powered across a level track by a jet engine that produced a thrust of 5.89 × 105 N for a distance of 520 m. Find the work done on the train. Answer in units of J.
asked by James 
Phyics
A ray of light strikes a mirror at an angle of 26 degrees to the normal. What is the angle of reflection? Answer in units of degrees .
asked by Maria 
Algebra
How many different points of intersection are there for x + y = 7 and y = x squared minus 7?
asked by Jack 
Math(Urgent)
Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation I put x+5y=5000. Is this correct.
asked by Hannah 
physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the
asked by Anonymous 
English
Can you help me check the following sentences I'm doubtful about? Thank you. 1)The dragon tries to kill Beowulf with the flames he blows from his mouth. 2) Beowulf is buried wiht the glory and the gold he had won (?) in his battles. 3) The name Beowulf
asked by Mike 
physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the
asked by Anonymous 
math
If the rate 130 miles per 2 hours is reduced to a unit rate,
asked by marleshiaw 
trigonometry
an example problem showed the following log tan A/2 = 9.54435  10 A= 38 deg 36' 12" Now i want to do the same. log tan A/2 = 9.85551  10 A= ?? I don't know how to convert tan into degrees can you help me.
asked by Anon 
Math(Please, please help)
Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation So the objective = f(x)=xy and the
asked by Hannah 
Math
Solving quadratic equations by graphing? 3. x24x + 6 = 0 4. x24x1=0 5. 4x212x + 3 = 0 6. x22x4=0
asked by Erin 
Chemistry
The Ka value for ethanoic acid is 1.8x10^5, what would be the pH of a 2.0x10^2 M solution of ethanoic acid?
asked by Rachael 
math
of the following which is the closest approximation to the amount of time it takes to read a 487page book at the rate of 25 pages a day ? a. 20 days b.25 days c.15 days d.10 days e.30 days
asked by nylija 
Chemistry
Which one of the following pairs of reactants would react together in a Lewis Acid/Lewis Base reaction? a. KOH and HNO2 b. NaOH and HCl c. CH3COOH and HF d. Ag+ and NH3 e. HClO and NH3
asked by Brian 
ROI and NPV
In the following problems, you will calculate the “simple metrics” for project selection. For these problems, please use the following data and assume discount rate (interest rate) of 0.06. Project A The upfront cost of the project is $500,000. This
asked by Anonymous 
rfvv
1. You can read whatever magazine you like. 2. You are able to read whatever magazine you like. 3. You may read whatever magazine you like. 4. You are allowed to read whatever magazine you like. (Does #1 mean #2 or #3?)
asked by English 
math
you intend to create a college fund for your baby. if you get an interest rate of 5.3% compounded monthly and want the fund to have $123,875 after 17 years, how much needs to be deposited each month? and 1 more jessica used a fixed installment loan from
asked by kayla 
algebra
A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.
asked by De Angelis 
maths
the distance from hertford to st albans is 32 km. how far apart will they be on a map of scale 1:50000?
asked by sweety 
Mathematics
Which set of ordered pairs are on the graph of the function y = 1/2 x  2 ? F (4,0) , (6,5 ) G (4,0) , (6, 5 ) H (4,0) , (6,5 ) J (4,0) , (6, 5 ) Help ? Please.
asked by Kelly 
physics
A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the
asked by Anonymous 
chemisrty
calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.
asked by michelle 
Managerial accounting
What is the method of inventory costing that assumes the unit product costs should be determined separately for each period i the order in which the costs were incurred? I think it is "process cost system". Is that right?
asked by Crystal 
college algebra
Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the value of x at that point.)
asked by amber 
Chem
AgNO3 (aq) + HCl (aq) ¨ AgCl (s) + HNO3 (aq) 40.30 grams of silver nitrate and excess HCl, how much silver chloride could you make?
asked by Gigi 
Writing
okay i have this writing assignment on how drunk driving can be stopped .. i have like three sentences to complete it and these three sentences are to explain how/what harsher penalties can help in stopping drunk driving.. I'm stuck because the following
asked by Anon 
math (algebra honors) #2
If the radius of a circle is increased by 6 cm, the new area is 121 (pi) cm^2. Find the radius of the original border using factoring.
asked by K.S. 
math
half of a gallon is a half gallon. half of a half gallon is a quart. half of a quart is a pint. half of a pint is a cup. a cup is what fraction of a quart? Is the answer 1/4?
asked by Trevor 
Algebra
Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the yaxis, y = 2, and y = 8.
asked by sam 
physics
It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?
asked by heather 
Calculus
Prove that (2,0) is the closest point on the curve x^2 + y^2 = 4 on (4,0.
asked by Akira 
Chemistry
Cr(OH)3Cr+3+3OH 1. which direction will equilibrium change if CrCl3 is added, why? 2. which direction will equilibrium change if HCL is added, why?
asked by kappie 
AP and GP
1) Given the terms a35 = 1238, a70 = 1483 of an AP. Find the exact value of the term a105 a sequence, and sum of sequence. 2) Given the term a3 = 99 and a5 = 891 of GP. Find the exact value of the term a7 of the sequence and the sum of sequence.
asked by Newbie 
Chemistry
Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.
asked by Ariel 
Math
1. 3+2+1=1+2+3 2. 3(1+4)=(3x1)+(3X4) 3. 9(5+6)=45+54 4. 9+(4+3)=(4+3)+9 5. (9+7)+6=9+(7+6) 6. 5(a+7)=5a+35 A. Associative Prop. of Addition B. Associative Prop. of Multiplication C. Commutative Prop. of Addition D. Commutative Prop. of Multiplication E.
asked by Hayley 
Physics
If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 55cm* 30cm *16cm , what would its mass be?
asked by Mia 
Chemistry
Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution
asked by Kiana 
Calculus
I'm a bit confused about the average equations with integration. I need to solve this problem, and I think I'm supposed to use substitution, but I can't get it to work. The problem looks like this: z(t)=4tsin(t^2), [0,π^1/2] Any input?
asked by Rachel 
English
Is "after the hurricane" a pharase or clause?
asked by Dan 
science
Methane is a natural gas, petrol is a liquid and wax is a solid. So explain the difference in phases or states of the molecules/compounds by reffering to the IMF
asked by Anonymous 
algebra
Sales tax in Pennsylvania is 6%. Create an equation for the total price (cost plus tax) of a purchase in PA in terms of its cost. How much would a person pay for a car whose cost is $32,000? PAY = COST + 0.06 * COST P=C(1+1.06) P=1.06C P= (32,000)=
asked by PEG 
Physics
A bottle has a mass of 34.20 g when empty and 91.91 g when filled with water. When filled with another fluid, the mass is 86.24g . What is the specific gravity of this other fluid?
asked by Mia 
phyics
A mechanic pushes a(n) 3980 kg car from rest to a speed of v, doing 5107 J of work in the process. During this time, the car moves 29.3m. Neglect friction between car and road. Find the speed v. Answer in units of m/s.
asked by leslie 
chemistry
What is the pH of a solution prepared by dissolving 7.5g HCl in water to make 375mL of solution?
asked by Brittany 
Physics 102 (College)
I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =
asked by Carla 
Physics 102 (College)
I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =
asked by Carla 
cosines
I don't know how to reverse cosine decimals into angles. Can you please explain and help me solve these . cos A= 0.28571428571 A= cos B= 0.66666666667 B= cos C= 0.5238089523
asked by Anon 
Social
How does capital help human productivity in relation to farm labor, office help, teaching, or government administration? I know capital is a source of income/money and it provides funding for school and teachers. How does it affect the government
asked by Jon 
science
what is the answer to the problem .003m = mm?
asked by Andrea 
trig
if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.
asked by tom 
Mathematics (Help? Please. )
Two parallel lines are cut by a transversal. Angles A and B are adjacent exterior angles. Angle A measures 87 degrees. What does Angle B measure?
asked by Barbie 
Physics
A block of mass 5 kg, which has an initial speed of 3 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J.
asked by Dave 
psychology
There are many social and cultural contexts you interact with that strongly influence development. These contexts include people you interact with daily, neighborhood factors, and larger scale social and cultural variables. In order to fully understand how
asked by april 
Math
Could someone please help me to identify what type of misrepresentation or misuse have demonstrated by the statement below. Here are choices only one of them connects with this statement: Which one? “…male children born to women who smoke during
asked by David 
Science
What minimum acceleration must it engines produce if the airoplane has become airbome after starting from rest and travelling a distance of 300m on the runway
asked by Nobuhle 
Chemistry
Why is it desirable in the method of backtitration to have a considerable amount(more than 10mL) of acid added in excess?
asked by E 
English
Punctuation Correction please! As we have discussed, the Spanish Club wants to sponsor a summer study trip to Spain. If our initial surveys are correct, the number of students wishing to participate in the summer study group will exceed 15.
asked by April 
English
Correct punctuation, please. Attached is a list of guiding principles drawn up by the Spanish Club Council for the students to follow while in Spain. We appreciate your support and we will keep you informed of the progress of our plans for the Spain summer
asked by April 
math
Please help me... How do I express the following products in scientific notation?? 1)(2.964 x 10^8) divided by (52 x 10^2) 2)(24.5 x 10 ^ negative 8) divided by (3x10^2) 3)(8.1 x 10^ negative 9) x (4 x 10^2)?
asked by stacie 
algebra
Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the yaxis, y = 2, and y = 8.
asked by Tom 
Algebra 1B
How do I solve \sqrt{\frac{33xy^{3}}{\sqrt{3x}}}? I am getting so confused and I need help please!
asked by Laura 
Math
If class starts at 11:50 and lasts 1 hour 40 min how do you write a math equation?
asked by Anthony 
Week 4 COM155
Second, write five sentences in which you address changes in your writing. I'm not exactly sure where to start with this one? The weeks readings were on word use, commonly misused words, and spelling. I'm not asking for any answers I just am not sure what
asked by BballBabe65 
physics
A 65 kg object is dropped from rest a distance of 4.3m onto a spring with a stiffness coefficient of 6.2x10^4n/m. How far is the spring compressed?
asked by Mark 
physics
If a masss of 65kg is dropped 4.3m onto a spring with a stiffness coefficient of 6.2x10^4 n/m, how far is the spring depressed?
asked by Mark 
Mathematics
Patrick has a summer job passing out flyers for a store. Each flyer weighs about 0.55 ounce. If he is given a bundle of flyers that weighs 16.5 Ibs , how many flyers must he pass out ? [ Help or Answers are appreciated greatly. Thank you. ]
asked by Miranda 
algebra
Graph the following equation: clculte the slope, xintercept, and yintercept, and label the the intercelts on the graph. problem: Find an equationin slopeintercept form passing through the points (2,5) and ( 7,3). (2+5)/(7+ 3) = 7/4 so y = (7/4)x +b
asked by PEG 
Chemistry
Decomp. of H2O2 with Catalase.I am trying to use the Arrhenius equation in my coursework, but i am struggling to get it to work. I have substituted most of the information in, such as activation energy(23000J), and gas constant(8.314x103) etc. The issue
asked by Suriya 
energy
one litre of liquid methanol will occupy how much volume in the state of vapour at 60 deg. Celsius?
asked by selvi 
History
The Inuit people of North America are all _______________
asked by Sally 
physics PLEASE HELP!
The coefficient of kinetic friction between a suitcase and the floor is 0.26. If the suitcase has a mass of 70.0 {kg}, how far can it be pushed across the level floor with 680 {J} of work?
asked by susan 
Calculus
Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: 1/x but I keep getting: 1/x^2 what do I have to do to get that answer?
asked by Abigail 
Ms. Sue
Ms. Sue Ive done my journal entries for the immigrant experience thing, and theres just one more thing I have to add at the end How has the landgranting system encourages speculation? I don't really know what to sayI was thinking of just ending it
asked by Sara 
Math
Find the unit price and tell which is the better buy: A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You can use a 20centsoffcoupon if you buy four 20 oz. bottles or a 15centsoffcoupon if you buy a 64 oz. bottle. Which is the
asked by Sammy 
rfvv
1. You can read whatever magazine you like. 2. You can read which magazine you like. 3. You can read that magazine you like. (Which one is right? Are they all grammatical? What is the difference in meaning?)
asked by English 
Science
Officials have found certain amounts of hazardous Fe3+ ions in the town of Scienceville's water supply. Using your knowledge of chemical reactions, suggest a way to eliminate this ion from Sciencevills's drinking water supply. Provide a thorough
asked by Alisha 
math
ms.pritchard wrote the following inequality on the board 5.6 with the sign greater on equal to then negative fourteen what should be the solution set for the inequality
asked by brooke 
management
what are the difference between them.. Democratic Group Authoritative Group Consultative Group Participative Group
asked by jessie 
MATH: Cash discounts / Trade discounts
This problem deals with TRADE & CASH DISCOUNTS. PLEASE HELP solving some questions. Here is some information in regards to the questions. THANK YOU! Misuse and abuse of trade discounts infringe on fair trade laws and can cost companies stiff fines and
asked by April 
Math(Urgent)
Differentiate. g(x)=(x^3+1)(3x^21) I know that the answer is 15x^43x^2+6x but I donot know how to get to this. I was using g'(x) X h(x) + g(x) X h'(x) and I was using the derivatives 3x^2 and 6x but I guess this is wrong. Please help!! Thank you.
asked by Hannah 
Physics
In an experiment using sodium light (λ=589 nm), the slits are 1.2 μm wide. You notice that every fourth fringes missing. a) What is the slit separation? b) How many fringes appear on the screen?
asked by George 
Chemistry
The Ka value for ethanoic acid is 1.8x10^5, what would be the pH of a 2.0x10^2 M solution of ethanoic acid?
asked by Rachael 
calculus
consider a point on a circle x2+y2=1.At what rate Y is changing with respect to X when the point is at X=1/2....
asked by Anonymous 
chemistry
For each titration of a buffer, how do i calculate how many mLs of titrant were required to obtain a 1.00 pH unit change from the initial pH?
asked by Wendy 
arithmetic
State whether the following sequence is arithmetic, geometric, or neither. 0, 1, 4, 9, 16, 25, 36, ....
asked by Anonymous 
math (algebra honors)
The edge of one cube is 2 cm shorter than the edge of a second cube. The volumes of the two cubes differ by 386 cm^3. Find the edge of the smaller cube using factoring.
asked by K.S. 
math
A cabaret show is put together by a manager who wishes to present two comedians and three singers. He can choose from 16 comedians and 17 singers. In how many ways can he select the acts for the show?
asked by Mike Hunt 
Math
Describe one real object with the given shape. Explain why you might want to find the volume of the object. Triangular prism
asked by Help plz 
math
Solve for x: log3(x^24)log3(x+2)=2
asked by julie 
Physics
A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J.
asked by Dave 
Quantitative methods
Assignment Problem 1* Print Media Advertising (PMA) has been given a contract to market Buzz Cola via newspaper ads in a major southern newspaper. Fullpage ads in the weekday editions (Monday through Saturday) cost $2000, whereas on Sunday a fullpage ad
asked by Matt 
algebra
how do you solve 140 s + 120 p = 1540 if your trying to figure out how many cups of juice there is for strawberry and pineapple if it has 120 calories & the strawberry one only has 140 ?
asked by abril 
English
I learned that handling behavior in a science lab is easy to do as long as the ground rules have been laid out for the students. Is this sentence correct?
asked by Pete 
Statistics
To determine whether themean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy program tests: Ho: mu = 1.4 Ha: mu > 1.4 The calculated value of the test statistic is z = 2.42. ==> How do I
asked by Emily 
Math
A stick 80 centimeters long makes a shadow that is 50 centimeters long. At the same time of the day, the shadow of the tower is 25 meters long. How high is the tower?
asked by June 
English
Please help Correct punctuation and spelling only. Thanks! We have received medical information from Midvale Clinic, and copies of all the documents we received are enclosed. We received nothing from Dr. Best, and the only items we received from Dr.
asked by April 
english
Please Help correct punctuation & spelling! Thank you! I tried to call you about the above case, but learned that you were out of town and will not return until Wednesday. You wrote to me on June 1 to ask what authority I had or could get to settle this
asked by April 
Math
How do you find the turning point of a quadratic equation? (The Formula)
asked by Bill 
Chemistry
If the surface area of a liquid is increased will the rate of evaporation increase?
asked by sabrina 
english
Please correct punctuation and spelling errors. Thank you! We have an appointment with Representative Howard at 1:30 p.m. on Tuesday, August 1, in Room 209 at the Capitol in Nashville. Our appointment will precede the General Committee meeting in room 7 of
asked by April 
ITE
What is the defenition for research?
asked by Emily 
math
Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.) 7x+2y=0 2x7y=0 x = y =
asked by jannette 
Math
how to multiply amd simplify of 8/63 x 21/32 x 9/42 = Pleas show work or give examples of simular problems
asked by TK 
Algebra
The fivedigit number 31d26  is divisible by 3. Find the sum of all possible values of d.
asked by Tom 
Math
Find the critical values of P(x) p(x)= (28+x)(8x/4) the answer was p=2447x+8xx^2/4 p=x^2/4 + x + 244 p'= x/2 +1 = 0 X=2 My question is, I do not understand how they got 7x + 8x at the beginning. I know (28)(8)=244 but I do not get the rest.
asked by Hannah 
management
what is the definition of the following,please help me.. Maslow’s Hierarchy
asked by jessie 
Chemistry
If I have 6 mol of N2 and 12 mol of H2 to yeild ammonia, which chemical is in excess and by how much?
asked by Darcy 
chemistry  human calorimeter
From experience, you know that you produce significantly more heat when you are exercising than when you are resting. Scientists can study the heat that is produced by human metabolism reactions using a ‘human calorimeter.’ Based on what you know about
asked by Farah 
calc
Can someone please show me how to find the integral of sin squared x?
asked by lo 
Chemistry (Math)
A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that
asked by Sally 
math
You and your friend each have a coin. For each round, each of you flips your coin. If both coins show heads, your friend pays you $3. If both show tails, your friend pays you $1. If the coins don't match, you pay him $2. Is this a fair game?
asked by natalie 
Calculus
Volume problem: y=x^3, x=y^3; rotated about xaxis I first made y=x^1/3, then x^3=x^1/3 Then I tried to do an integration from 0 to 1 with x^1/3x^3, but I can't get one of the possible answers, which are: A. 16/35π B. 16/7π C. 18/35 D. 7/2 E. 16π Any
asked by Leona 
maths
Make k the subject of the following two equations. 1) 8k+2=3(4k+t) 2)7k+11t=59kt
asked by Beth 
Chemistry
What unit is barometric pressure measured in?
asked by Ana 
chemistry
How would the % of Fe determined be affected if the unknowns had not been dried and had contained adsorbed water in the titration?
asked by melissajdfaks 
Geometry
The date December 31, 2043 can be written in the format 12/31/43. This is an example of a true mathematical statement because 12 + 31 = 43. Suppose I wanted to write dates in the 21st century for Valentine’s Day (which is always celebrated on February
asked by Anonymous 
math
integration of x^2 * cos^2(x)
asked by chris 
Chemistry
Cr(OH)3Cr+3+3OH which direction will equilibrium change if CrCl3 is added and why. which direction will it change if HCL is added and why?
asked by apple 
2 balloons and a doubled distance (physics)
EARLIER SOMEONE POSTED: "Two likecharged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N
asked by help! 
HCS/335
can someone help me find a current article relating to this thank you!! Find a current administrative issue in a newspaper, magazine, or journal article relating to topics such as patient privacy, confidentiality, or HIPAA Write a 1,050 to 1,400word
asked by bobbi...plz help 
calculus
find the area of each circle. use 22 over 7 for pie. and radis for 15 in.
asked by barb 
algebra
Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the yaxis, y = 2 , and y = 8.
asked by george 
Math
Find the perimeter of the cord r=a(1+cos theta)
asked by Current puestio 
Physics
part 1 A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J. part 2 Find the average power delivered by the engine in the first 1.808 s. Answer in units of W. part 3 Find the
asked by Mike 
physics
A charge of .250 C moves vertically in a field of .500 T that is oriented some angle from the vertical. If the charges's speed is 2.0 x 10 ^2 m/s, what angle(s) will ensure that the force acting on the charge is 5.0 N?
asked by Adam 
Physics
part 1 A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J. part 2 Find the average power delivered by the engine in the first 1.808 s. Answer in units of W. part 3 Find the
asked by Mike 
biology
in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge
asked by tarkan 
chemistry (urgent)
Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the dichromate in the solution?(hint:the acid is a solvent)
asked by Anonymous 
Chemistry (Math)
A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that
asked by Sally 
AP World History
Comparing the four Classical Societies, in essay format, of China (Han & Qin), India (Gupta empire) and Rome and Greece. I really need a good essay because I lost mine the day it was due and now it's late.
asked by Erin 
Algrebra
The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth poin
asked by Anonymous 
algebra
Given that XY =21 and 1 < x < 2, find the sum of the upper and lower bounds of Y. Express your answer as a decimal.
asked by Tom 
algebra
Graph the following equation: clculte the slope, xintercept, and yintercept, and label the the intercelts on the graph. problem: Find an equationin slopeintercept form passing through the points (2,5) and ( 7,3).
asked by PEG 
English
I forgot to include the following sentences. 1) Other themes are (those of?) the passing of time and the relationship with nature. 2) Beowulf swang up (the same as "raised"?) his towering shield and shook out (the same as "lifted") his sword so hard that
asked by Mike 
Biology
how does esctacy work plz i need 3 explanation
asked by tarkan 
calculus
Calculate the derivative indicated. y '(25), y = ãx + 2 x
asked by Anonymous 
Physics
Suppose a motorcycle with uniform motion travels from a position of 5.0km[S] to a position of 20.0km[N] in 0.5h Find the motorcycle's A) displacement B) velocity C) Distance Travelled D) speed.
asked by Bob 
math
integration of cot^4(12x)dx
asked by daniel 
Math
What's the function? x= 2, y=14 x=10, y=54 x=8, y=44 x=?, y=34 x=?, y=104 x=?, y=31 I thought it was multiply by 5, add 4 but that won't work for the last one where y=31. Help!
asked by David 
english
Punctuation Correction please! At the present time, the Spanish instructor Joseph Diaz has agreed to assume the major responsibility for the final arrangements. Karen McGraw, president of the Instructor’s Council and her husband have agreed to accompany
asked by April 
algebra
Could someone please explain to me how to do this problem, and also what the answer is? I don't understand !! (8x10^4) x (4.43 x 10^9). THANKS SO MUCH!
asked by stacie 
Math
A pipe has an outside diameter of 1.25 inches and an inside diameter of 0.75 inches. If Kelly hacksaws the pipe in two, what fraction of the pipe cross sectional area is sawn when the blade breaks through to the inside?
asked by Anonymus 
mathcalc
find third derivate f(x)=x/x+1
asked by shakira 
Math
If X=11 inches, Y=8 inches, and Z=6 inches, what is the area of the parallelogram above?
asked by Garrett 
Math
If a person was locked in a perfectly insulated room 8ft by 8ft by 10ft, how long would it take the room temperature to increase from 75 degree Farenheit to 100 degree Farenheit? The density of air is 1.2 Kg/Cubic meter and 1 watt sec is its specific heat.
asked by Anonymus 
physical science
how gravitational acceleration is used to benefit mankind and the environment.how can rural people also benefit from the use of gravitational acceleration?
asked by itumeleng 
us history
what is your opinion on if the united states should have became isolated after the cold war to maintain peace
asked by mary 
calculus
Find the derivative of the inverse for the function f and real number a. f(x)=xrad(x3) a=4 Please help. Thank you very much for your time and assistance.
asked by Jake 
Math
Write a mulplication problem. It's a square where 50 little squares are shaded, 20 are not shaded and 30 are double shaded
asked by please help 
algebra 2
Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.
asked by Esther 
Biology
in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge
asked by tarkan 
history
Discuss one example of cultural, economic, or environmental diffusion between your chosen society and another society, either from this list or of your choosing. • Mesopotamia • Indus River Valley • Yellow River Valley • Egypt • Ancient South
asked by Anonymous 
math
fixed installment loan of $13,500 with 60 months to pay back, monthly payments of $280.24. instead of making 36th payment, pays remaining balance on loan. how much interest saved? use acturial method u= n*p*v/100+v
asked by kayla 
calculus
Find an equation of the tangent line to the curve at the given point. y = 7 sec x P = (π/3, 14)
asked by Anonymous 
art
he is a artist I am at work, and have done much, but I wish I had eight pairs of hands and another body to shoot the specimens.
asked by love of this country 
trigonometry (repost) Mathmate
Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" Using the previous values, a=21.46 b=46.28 C=322830=32.475 We have A+B=18032.475=147.525 a+b=67.74 ab=24.82 tan((A+B)/2)=3.433633
asked by Anon 
math
Insert 3 numbers between15 to 17 such that the terms from an Arithmetic progression
asked by shakira.shakira 
science
Differentiate between intermolecular and intramolecular forces
asked by Sebogodi 
capital budgeting
Retained earning is a free source of funds to the company. Therefore, we can ignore retained earnings when computing the cost of capital. Do you agree or disagree with this statement?
asked by teresa 
Algebra II
I should know where to start, but I have a brain freeze. Will someone get me started? a^2 + b^2 = f^2, solve for a thanks :)
asked by Nancy 
history
. Which of the following is true with regards to the Navigation Acts by the eighteenth century? A. The acts replaced the colonial admiralty courts. B. In general, the colonists despised the acts and smuggling was rampant. C. The Navigation Act of 1696
asked by Anonymous 
geometry (high school)
if there are two tangent circles that have two external tangent lines that intersect at a 60 degree angle, what is the ratio of the radii.
asked by Tan 
management
please help me to to get the answers for these quesyions below.. I. Odd Man Out: SHADE IN BLUE the letter of the item that does not belong to the group. 1. 4. a. Communication a. Physiological b. Motivation b. Relatedness c. Leadership c. Safety & Security
asked by jessie 
science
how do i figure out the science metric conversion of .003 m = mm?
asked by Andrea 
biology grade 12
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity (seconds obviously, these are the times it took the enzyme to
asked by hello 
science biochem please help!!!!
I don't know where to start with it? A tube is set up for radioimmunoassay containing antibody with a capacity for binding 1ug antigen. Both labelled (50,000 counts per ug) and unlabelled antigen are added to the tube. Work out a formula to calculate the
asked by Isabel 
business/law
what is a status of affirmative action today? Have things improved? What does the future hold?
asked by mery 
physics
A mesquito whistles a note of 300 Hz, and flies towards you at a speed of 30 m/s. The air temprature is 20 degrees celcius. Before doing any calculations, determine wether you will observe a note that is greater, less than, or equal to 300 Hz (I have
asked by Taylor 
math
Find the slope and yintercept for the line. Assume a = 4, b = 2, c = 4.
asked by jannette 
MATH
A rectangular flower is 20 inches long,8 inches wide ,and 6 inches high . True of false. If andy fills the flower pot 2/3 full of soil, the expression 2/3(20 + 8 + 6) could be used to find the about of soil he needed.
asked by Dani 
Math
A storage box measure 24in by 12in by 3in. Find its volume to the nearest cubic meter (1in =2.54cm)
asked by Anonymous 
English
Correct Punctuation, please. As you know, the students will be staying in private homes in the city while studying and touring. Mr. Diaz is preparing a detailed report of the trip plans, and will submit it to you within the next few days.
asked by April 
English
Correct punctuation, please. The students will be able to receive mail through the American Consul in the city, and any emergency messages should be directed to the office of the American Consul. Since several short excursions are planned to visit the site
asked by April 
Physics
Suppose a motorcycle with uniform motion travels from a position of 5.0km[S] to a position of 20.0km[N] in 0.5h Find the motorcycle's A) displacement B) velocity C) Distance Travelled D) speed.
asked by Bob 
geog
what heat engine transfers heat energy from the tropics to the poles?
asked by anonymous 
Finding gradient at a given point
"Find the gradient f(x,y)= x^(2)*y + 7xy^(3) at (1,2)." Thank you!
asked by Anonymous 
Calc
The question that I'm stuck on is this: "Let f(x,y)= x^(2)*ln(y). Find the average rage of change of f as you go from (3,1) to (1,2) and find the instantaneous rate of change of f as you leave the point (3,1) toward (2,1)." Any help would be appreciated.
asked by Brittany 
math
1+(3)(1)(4)+2=
asked by alalee 
mathcalc
function f(x)=3x^22x1 find equation of the line that is tangent and parallel to 8x2y+12=0
asked by shakira 
mathcalc
derivate of 2sin(x)cos(x)cot(x)
asked by shakira 
algebra
solve using the elimination method x+7y=58 x+4y=30
asked by jay 
linear equation
For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _
asked by winning 
math
what is the area of the region enclosed by the graphs of y=2 lx3l and y= x^22x?
asked by cherry 
chemristy
How many mL of 8.0 M HCl must you dilute with an appropriate volume of H2O to prepare a total volume of 260.0 mL of 1.5 M HCl?
asked by Herman 
science
A 60.0mL 0.508 M glucose (C6H12O6) solution is mixed with 115.0 mL of 2.43 M glucose solution. What is the concentration of the final solution? Assume the volumes are additive.
asked by Kiana 
Math
1. 4+7=7+4 2. 9+5+3=3+5+9 3. 5(7+1)=35+3 4. (1+2)+3=1+(2+3) 5. 6(a3)=6a18 6. (9+5)+4=5+(4+9) A. Associative Prop of Addition B. Associative Prop of Multiplication C. Commutative Prop of Addition D. Commutative Prop of Multiplication E. Distributive Prop
asked by Hayley 
physics
A charge of .250 C moves vertically in a field of .500 T that is oriented some angle from the vertical. If the charges's speed is 2.0 x 10 ^2 m/s, what angle(s) will ensure that the force acting on the charge is 5.0 N?
asked by Adam 
english
in tragedy vocabulary. I need the word for the following definition. a device where by the audience or reader understands more of a situation or of what is being said than a character is aware of.
asked by Pete 
English
After we did two types of sand together, he did the rest on his own. or After we had done two types of sand together, he did the rest on his own. Which one is correct?
asked by Pete 
gr. 12 biology
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the
asked by paul 
science
I need urgent help. Use two diagrams of amnomia molecules to indicate the inter and intramolecular force
asked by Obakeng matlakaselo 
Math
Autoparts Inc. produces three types of parts' assemblies: (P,Q,R)and they each require (2,5,3) units of work on machine I and (2,2,4) units of work on machine II respectively. The two machines have respectively (160,190) units of work available per day. It
asked by Tracy 
chemistry
what is the electronic configuration for;1.Iron chloride,2. Aluminium oxide,3.Benzene?
asked by leonel 
Calculus
Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: 1/x but I keep getting: 1/x^2 what do I have to do to get that answer?
asked by Abigail 
English
how can you interpret this quote: "the things we're drawn to satirize are, in many cases, the things we're most wary about in ourselves"
asked by Titi 
Maths
Factorise x^2+y^2
asked by Anonymous 
math again
what is 1  % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:)
asked by Olivia 
math again
what is 1  % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:)
asked by Olivia 
Science
Which of the following would typically contain ribosomes? (a) fungi (b) bacteria (c) Archeae (d) viruses (e) prions
asked by Sally 
calculus
Find the area of the figure. 17) E ach square is 7 ft by 7 ft.
asked by Anonymous 
calculus
determine the domain for each function f(x)=2x+3,g(x)=x1
asked by jason 
english
• Use at least five adverbs and five adjectives to write a 150 to 300word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. Here is what I wrote, but I am having trouble
asked by Havingtroublehere 
Math
Construct a truth table for ~q^p
asked by Niki 
social studies
were the british justified using that amount of force against the french in 1837? use examples from 2011 to help explain your answer
asked by melissa 
math
how do you do capacity using only gallos
asked by tangie 
Math
1. 3(1+4)=(3X1)+(3X4) Would this be Distributive Property
asked by Hayley 
math quick question
Hi! Thank you for your help~~ What is the absolute value of (3x  6)^2 ? (i am trying to use this to find the radius of convergence of a power series by the way)..
asked by KIKSY 
History
What did people in the House of Tudor do?
asked by Sally 
Physics 102 (College)
A few homework problems. 1) The temp of a monotomic ideal gas remains constant (isothermic) during a process in which 4250 J of heat flows out of gas. How much work is done? Pos/neg? delta T = 0 and delta U = 0 by inference Q = 4250 U = 3/2 nRT Thanks for
asked by Carla 
algebra 2
Factor completely 6r^2+13rd+6b^2. Thank you.
asked by Esther 
algebra 2
Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.
asked by Esther 
Physics
I just need ideas on how i can estimate the height of a building by using only a tennis ball and a stop watch. I can only measure it by being on the ground level.
asked by Caitlin 
Calculus AB
Find the indefinite Integral of: (e^(2x)e^(2x))/(e^(2x)+e^(2x))dx Thank you very much for your help.
asked by Jake 
math
i gave away 20 marbles leaving 60%, how many marbles did i have
asked by a 
chemistry
Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the dichromate in the solution?(the acid is a solvent) don't want answer just want to know how to work it out.
asked by Anonymous 
geometry
To the nearest tenth of a foot, what distance (x) from the building should Tim place the 16 ft ladder so that the top of the ladder will be 12 feet above the ground.
asked by Kierra 
English
I need the vocab word for the following definiton: Unrealistic devices or procedures that the audience agrees to accept (ex: aside).
asked by Pete 
socials
some examples of ads using play on words
asked by james jackson 
12th grade, Advance Algebra
How to press the value of log, to evaluate log, to find the unknown log using EL531WH, advance D.A.L
asked by Eunthin 
Algebra
What is the domain of: ~4:(4x8)
asked by AC2 
Chemistry please help
How do I go about preparing 50% ethanol and 70% ethanol from 95% ethanol?
asked by michelle 
math
1) 3x square4x+7 2) 4x square5x+6 3) 2x square4x+3
asked by shakira.shakira 
accounting
did these questions ever get answered
asked by rob 
grammar
what is the simple subject in the sentence thier apple does not smell very good.
asked by traci 
math
A restaurant offers an "appetizerplate special" consisting of six selections from its list of appetizers. If there are more than 8000 different possible appetizerplate specials, what is the least possible number of appetizers?
asked by ravin 
calculus
determine the domain for each function f(x)=6x^(2)x1, g(x)=x1
asked by jason 
Mathematics
Hello, what is the absolute value of ((3x2)^2) ? I know normally, if this was 3x2, you would do 1
asked by student3 
math
if x=f and f is 13 what is t
asked by person 
equation
For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _
asked by winning 
equation
For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _
asked by winning 
gr. 12 biology
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the
asked by paul 
Math
Consider the region defined by the inequalities: 0≤x 0≤y 21/4≤y7/4x y+x≤7 4≤y3/7x Pick up those points which are the boundary points of the resulting convex region.
asked by haylie 
management
what are the 6 COMMUNICATION APPROACHES
asked by jessie 
Anthropology
1) I have to give out an example of how dogs have evolved, but I don't know any. 2) How has Dr. Francine Patterson's research helped the plight of all animals?
asked by Alex L. 
chemistry
draw the electronic configurationd for; 1.Iron chloride,2. Aluminium oxide,3. Benzene
asked by Onke 
English
Please HELP correct punctuation & spelling only. THANK YOU! In your letter of July 18, you made a settlement demand of $20,000; accordingly, we have forwarded your settlement demand: the medical reports from Dr. Hammonds and the hospital records to our
asked by April 
calculus
determine the domain for each function f(x)=x6, g(x)=3x^(2)
asked by jason 
math
give exact and approximate solutions to three decimal places y^212y+36=4
asked by anne 
Arithmetic
Given that 3, b, c and 18 are an AP. Find the value of b and c.
asked by Member001 
College Algebra
need help in solving how many miles can i drive on 60 gallons of gas, with the Mpg 30 in the city, and 42 highway. I would like all the steps, never had algebra before, so i am very lost.
asked by Dee 
computers
what can be done using computers in medical billing and coding and nursing.
asked by genna 
economic
what are three problems students face when parked on campus
asked by deb