Questions Asked on
April 12, 2013

Chemistry
Calculate E°cell (in volts) for a fuel cell that employs the reaction between methane gas and oxygen to form carbon dioxide and water. (to 4 significant figures) ∆G⁰f for CH4 = 50.5 kJ/mol ∆G⁰f for CO2 = 394.4 kJ/mol F = 96485/mol e I got
asked by Anonymous 
Applied Calculus
Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___
asked by Jacob 
trig
an airplane has an airspeed of 430 miles per hour at a bearing of 135 degrees. the wind velocity is 35 miles per hour in the direction N30degreesE. Find the resultant speed and direction of the plane.
asked by kayleigh 
College Chemistry
For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4
asked by Jose 
Chemistry
How many grams of NaF should be added to 612 ml of 0.4 M HF (Ka = 6.8 x 104) to produce a buffer solution where pH = 3.10?
asked by Ashley 
PHYSICS! I CAN NOT GET
A group of swimmers is resting in the sun on an offshore raft. They estimate that 2.5 m separates a trough and an adjacent crest of surface waves on the lake. They count 15 crests that pass by the raft in 15 s. How fast are the waves moving? ____m/s (I
asked by Jessica 
math
A student says that the solution of 375 = x – 28 is 347. Explain the student’s error and find the correct answer
asked by manny 
Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.
asked by Tina 
PHYSICS/MATH
A mass and spring are arranged on a horizontal, frictionless table. The spring constant is k = 450 N/m, and the mass is 5.4 kg. The block is pushed against the spring so that the spring is compressed an amount 0.35 m, and then it is released. Find the
asked by HP 
Maths
In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?
asked by Ian 
Physics
A small steel sphere of mass 0.40 kg is attached by a 0.50 m long cord to a swivel pin set into the surface of a frictionless table top. The sphere moves in a circle on the horizontal surface with a speed of 6.0 m/s. a.) what is the magnitude of the
asked by Alex 
Life Orientation
Identify one environmental or human factor that causes ill health,accidents,crises and disasters within any community within South Africa.
asked by Boitumelo 
Calculus
The unit selling price p (in dollars) and the quantity demanded x (in pairs) of a certain brand of women’s shoes are given by the demand equation P(x) = 100e^0.001x f or 0 _< x _< 20,000. a. Find the revenue function, R. (Hint: R(x) = x(p(x)), since the
asked by Wiz 
Math
Lisa borrowed 8,000 on an 8% , 60 day note after 15 days she paid 2,000 on the note on day 45 she paid 1,000 on the note what is the total interest and ending balance due by the us rule of ordinary interest.
asked by Rhonda 
Calculus
The unit selling price p (in dollars) and the quantity demanded x (in pairs) of a certain brand of women’s shoes are given by the demand equation P(x) = 100e^0.001x f or 0 _< x _< 20,000. a. Find the revenue function, R. (Hint: R(x) = x(p(x)), since the
asked by Wiz 
calculus
Find the volume of the solid generated by revolving the region about the given line. The region in the second quadrant bounded above by the curve y = 16  x2, below by the xaxis, and on the right by the yaxis, about the line x = 1 I have gathered, that
asked by Tiffany 
Statistics
The lifetime of computer chips is approximately normal with mean 1.4×106 hours and standard deviation 3×105 hours. The statistics department has 5 computers built with that chip as the main component. What is the probability that all 5 computers last
asked by Andy 
phy
Doppler ultrasound is used to measure the speed of blood flow. If the speed of the red blood cells is v, the speed of sound in blood is u, the ultrasound source emits waves of frequency f, and we assume that the blood cells are moving directly toward the
asked by kira 
Chemistry
Using the given boiling points, predict which compound has the higher vapor pressure at a given temperature. A. ethanol (C2H6O, bp 78 degrees C) or 1propanol (C3H8O, bp 97 degrees C) B. hexane (C6H14, bp 69 degrees C) or octane (C8H18, bp 125 degrees C)
asked by Ryan 
U.S/history AP
The War of 1812also called the second war of American Independence or by opponents the dersive ().U.S.declared war on Britain because they did not recognize our neutrality and interfered with our freedom of the()shipping My answers are: GREAT
asked by joy 
ece
On the Child Development Checklist, you've checked the item "Spends time watching others at play" for a preschool child in your group. Which of the following is the most likely reason for the child's behavior? A. The child needs the teacher's help to get
asked by Anonymous 
chemistry
Which of these processes will lower the glass transition temperature of a glass? Increase the cooling rate, Decrease the cooling rate, Increase amount of network modifier, Decrease amount of network modifier, Quench the glass to cool the surfaces quickly,
asked by adex 
Spanish
4. Fill in the blank with a correct expression with tener to express the following. She is hot. Ella ________. Answer: ella tienen calor 5. Fill in the blank with a correct expression with tener to express the following. She is cold. Ella ________. Answer:
asked by Cassie 
Science Check answer
Key: ☺ = My Answer! 1. The thermal energy of an object is _____. its potential energy its average kinetic energy ☺ its potential energy minus its kinetic energy its kinetic energy plus its potential energy 2. A device that can be used both for cooling
asked by Jman 
chemistry
Monosodium glutamate (aka MSG) NaC5H8NO4 is used as a food additive for flavor or as a preservative. a. what is the mass of MSG (g) that contains 545 mg sodium? b. calculate the percentage of each element present in MSG.
asked by Jillian 
maths
if n is an odd positive integer, then prove that n^2 1 is divisible by 8
asked by anoynomous 
algebra :( help me!!
The table below shows the weekly earnings of two groups of employees working parttime at a local grocery store. GROUP A: $245, $224, $218, $295, $214, $312, $284 GROUP B: $223, $230, $310, $246, $295, $301, $215 PART A: What is the mean for each group?
asked by Alexandrea 
Chemistry
The pH of an 0.0870 M solution of weak acid A is 2.20. The pH of an 0.0830 M solution of weak acid B is 4.07. The pH of an 0.0890 M solution of weak acid C is 5.13. Identify the three acids from among those listed below (the Ka values are listed in
asked by Maddie 
phy
At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in
asked by kira 
Chemistry
Consider the equilibrium 2NO (g) 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations in the "new" equilibrium in
asked by Anna 
Physics
During a free kick at a soccer playoff game a 0.7 kg ball at the peak of the kick 14.7 m above the field had a kinetic energy of 39.8 J. How fast was the ball booted by the player on the field?
asked by Lawng 
chemistry
Consider two glasses. Glass A has a composition of 5% CaO  95% B2O3. Glass B has a composition of 15% CaO  85% B2O3. Both samples are cooled from their molten state to room temperature at rates that result in an identical glass transition temperature.
asked by adex 
conceptional physics
If a 35cm radius tire spins at a rate of 72 rad/s what is the rotating speed?
asked by donnell 
Chemistry
If N2 is added to a balloon that contains O2 (partial pressure 450 mm Hg) and CO2 (partial pressure 150 mm Hg) to give a total pressure of 850 mm Hg, what is the partial pressure of each gas in the final mixture?
asked by Ryan 
Chemistry
An unknown amount of gas occupies 30.0 L at 2.1 atm and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?
asked by Ryan 
Math  Please help
I need help on the following please? A group of clowns performs in a ring with an area of about 2,123 square feet. What is the circumference of the ring? Choose the closest answer. 156 ft. 52 ft. 163 ft. 82 ft. Thank You. Please explain the answer
asked by Christopher 
Honors Math
Please help! Malia incorrectly graph the equation y=2/3x+12 with a slope of 3/2. What should malia's corrected graph look like? The answers can be: A. Vertical B. Horizontal C. Less Steep D. More Steep P.S. The / doesn't mean divide in this equation. It is
asked by Lizzy 
U.S/history AP
the act of bringing land into U.S.through agreemrnt of a majority of congress.Texas and hawai joined the U.S.in this manner. my answer:texas annexation1845
asked by joy 
Finance
lisa borrowed $8000.00 on an 8%, 60 day note after 15 days she paid $2000.00 on the note , on day 45 , she paid $1000.00 on the note. What is the total interest and ending balance due by us rule by ordinary interest
asked by Tim 
Calculus
Estimate the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles. b. Sketch for yourself the graph of f and the rectangles. Is this left sum an overestimate or underestimate? Enter OVER or UNDER. c. Now use 5 right rectangles to
asked by Daniel 
HELP URGENT Phyiics
What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and
asked by HELP 
Psychology
The means of travel within and between neurons is different because: A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons. B. chemical signals move the impulses within the neuron, while electrical
asked by Angela 
Calculus
The present value of a building in the downtown area is given by the function p(t) = 300,000e^0.09t+ãt/2 f or 0 _< t _< 10 Find the optimal present value of the building. (Hint: Use a graphing utility to graph the function, P(t), and find the value of
asked by Deeno 
Physics :(( help please TT
You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the
asked by Ian 
PHYSICS/MATH
What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s?
asked by HP 
Chemisty
Before solving the problem write a balanced chemical equation Excess aqueous NaI was added to 50 mL of aqueous CuNO3 solution, and 14.2 g of CuI precipitate was formed. What was the molar concentration of CuNO3 in the original solution? Answer in units of
asked by Nick 
HELP Physics
The average rate at which energy is conducted outward through the ground surface in a certain region is 30.9 mW/m2, and the average thermal conductivity of the nearsurface rocks is 3.11 W/m·K. Assuming a surface temperature of 9.48°C, find the
asked by Shane 
Psychology
Dr. Lange is a developmental psychologist. He specialized in cognitive development during the period of infancy. Like most psychologists who focus on specific periods of development, his studies: A. emphasize the chemical changes in the synaptic gap. B.
asked by Angela 
chemistry
Please mark below all of the statments that correctly describe the physical properties of glass. Glasses do not have slip systems.Glasses consist of both covalent and ionic bonding.Glasses are brittle at room temperature.Glasses are amorphous and have no
asked by adex 
physics
A coil consists of N=105 turns of wire wrapped uniformly around a plastic torus. The inside radius of the torus is r0=0.12 m and the outer radius is r1=0.14 m. Thus, each winding has a diameter d=0.02 m. What is the selfinductance (in H) of this coil?
asked by dd 
ece
Studies of children throwing have revealed that two and threeyearolds A. throw while stepping forward with the opposite foot. B. throw with body rotation and full arm range. C. are unable to throw a ball of any size. D. throw mainly with their forearms,
asked by Anonymous 
computer programing
Car A, with a mass of 1250 kg, is traveling at 30 m/s to the east. A truck with mass of 2000 kg, traveling to the west at 25 m/s. An inelastic collision occurred, not sticking together, the car goes off 10 m/s to the west. What is the resulting velocity of
asked by Amandos Leonard 
Phyics
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a
asked by HELP PLEASE 
math
I have a box of tiles 12" x 12"  how many tiles will I need for a 9 foot x 12 foot room?
asked by Anonymous 
Physics multiple choice
3. What are the units for Coeffecient of Lift? [kgm^3] No units [Ns] [N^2] [N] [ms^1] [kg] 4. What are the units for the ratio Lift to Drag? [Ns] [kgm^3] No units [ms^1] [kg] [N^2] [N]
asked by John 
Maths
Find the number of positive integers
asked by Ian 
english
WRITE the adverb form that correctly completes the sentence. Hawks resemble falcons (close) of all birds.
asked by sam 
interpersonal communication
Selfconcept is changed through interpersonal communication
asked by amy 
science
using the punnet square one trait is Dd and the other id dd. 1) does the mother or father in a have dimples b) what percentage of children are likely to have dimples i think for a: it is the father because of the D so that it dominant and b:50 because two
asked by Anonymous 
Psychology
Behavioral geneticists and evolutionary psychologists emphasize: A. environmental influence on development. B. the role of personality in development. C. the significance of hereditary factors in development. D. the importance of parenting skills in
asked by Angela 
L>O
provide recommendation on how to address the topic that you identified in the previous question(HIV and AIDS)
asked by tsundzuka 
Psychology
Behavioral geneticists and evolutionary psychologists emphasize: A. environmental influence on development. B. the role of personality in development. C. the significance of hereditary factors in development. D. the importance of parenting skills in
asked by Angela 
Science 8
Kinetic energy increases as a. mass increases and velocity decreases b. mass decreases and velocity increases c. both mass and velocity increase d. both mass and velocity decrease
asked by Anonymous 
physics
A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram,
asked by Chad 
english
4. Identify what is wrong with the following sentence: “Not realizing that there was a hole in the tire”. Then, revise the sentence in order to correct the problem and discuss the changes you have made.
asked by Shorty 
Statistics
You have spent a very long time training your dog to open the refrigerator and bring you a drink when you ask him to. Since your pet can’t read, his selection of the specific type of beverage he brings is completely random – although you notice that,
asked by simone 
physics
Calculate the number of H2O molecules in a human body of mass 50.6 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)
asked by kira 
child daycare
1. A _______centered program is most helpful to the children served. A. family B. child C. school D. parent 2. The vision and goals of an afterschool program should be translated into a A. preprietorship. B. parent letter. C. newsletter. D. mission
asked by R.M.K 
physics
Compare the total magnetic energy in two solenoids, each with N turns, area A, and current I, but length x and 2x. Denote Ux the total magnetic energy in the solenoid with length x, and U2x the one in the solenoid with length 2x. What is U2x/Ux?
asked by dd 
Science
A car weighing 24,500 Newtons is traveling east and travels a distance of 100 meters in 20 seconds. What is the car's mass? What is the car's kinetic energy?
asked by Lele Reynolds 
physics
Consider the process of charging a parallel plate capacitor with circular plates of radius R=5 cm separated by a distance d=0.2 cm. At some time t1, the capacitor is being charged with a current I=0.075 A. Consider a point P on the plane which is equally
asked by dd 
physics
Consider a circuit with an RL series with L=0.09 H and R=0.05 Ohm. At t=0 the circuit is connected to a battery which provides V0=12 V. (a)How long does it take to the current to equal a fraction 0.95 of the steady state current? (b) What is the energy
asked by dd 
ece
It's difficult for a young child to experience true empathy until he or she A. reaches the age of 8. B. is able to see things from another person's perspective. C. has been taught about it by his parents. D. has experienced difficulties himself.
asked by Anonymous 
problem solving
ou are completing the final exam in your class. Your instructor’s assignment instructions state that you may only use the following resources: library books, class notes, texts, and the instructor. You and your roommate discussed one of the questions,
asked by ashley 
Chemistry
Potassium hypobromite, KOBr, converts ammonia to nitrogen by the following reaction. 3KOBr + 2NH3 N2 + 3KBr + 3H2O To prepare 448.2 mL of dry N2, when measured at 22.3 °C and 777.3 torr, what is the minimum number of grams of KOBr required?
asked by Paxton 
Calculus
Use 5 right rectangles to estimate the area of the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles?
asked by Molly 
Precalculus HELP PLEASE !
Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2).
asked by Becca 
Calculus please help !
Find the coordinates of the center of the ellipse represented by 4x^2 + 9y^2 – 18y – 27 = 0. For 2x^2 + xy + 2y^2 = 1, find , the angle of rotation about the origin, to the nearest degree. Find the distance between points at (–1, 6) and (5, –2).
asked by Becca 
personal
Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by
asked by jos 
LIfe Orientation
suggest 5 recommendation on how to address the air pollution
asked by Beverlyn 
chemistry
A glass of composition 85% SiO2  15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens approximately the size and shape of credit cards are soaked for the same amount of time at 850degreeC. Sample A is soaked in NaCl
asked by adex 
science need help
using the punnet square one trait is Dd and the other is dd. 1) does the mother or father in a have dimples b) what percentage of children are likely to have dimples i think for a: it is the father because of the D so that it dominant and b:50 because two
asked by Anonymous 
Psychology
According to the allornone law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual
asked by Angela 
ap chemistry
The volume of 0.100 mol of helium gas at 34°C is increased isothermally from 1.00 L to 4.50 L. Assuming the gas to be ideal, calculate the entropy change for the process.
asked by sarah 
math
Problem #1: Find the total amount if you deposit $500 at a rate of 5% for two years using simple interest. Year 1 Year 2 Problem #2: Find the total amount if you deposit $300 at a rate of 6% for three years using simple interest. Year 1 Year 2 Year 3
asked by Boobear 
U.S/history AP
The french and indian war began in the colonies in the year 1754 and ended in the year 1763 in the colonies,the main reason for conflict between the french and colonists was over the Ohio river valley.After this war the english began the practice of 
asked by joy 
chemistry
What is the difference between e/z notation and cistrans isomerism?
asked by black_widow 
please help! precalculus
Let f(x) = 6.4 sin(x) 6.6 cos(x). What is the maximum and minimum value of this function? report answers accurate to 4 decimal places
asked by anonymous 
precalculus PLEASE HELP!!
Rewrite 4 sin(x) 1 cos(x) as A sin(x + phi) A= phi= pi less than phi less than pi
asked by anonymous 
math
solving with elimination 7x4y=13 2x5y =4
asked by anatoliy 
MATHS!!!Please HELP..:'(
Raj and Vikram are two travelers in ancient India, walking along the Silk road. On the first day of travel, Raj travels 5 yojanas, and on each successive day travels 3 yojanas more than the previous day. Vikram started at the same place and travels the
asked by Oian 
math
solving with elimination 7x4y=13 2x5y =4
asked by anatoliy 
physics
A technician at the top of a 200m tall radio tower drops her hammer. how much time does it take for the hammer to strike the ground?
asked by jasmine 
ece
When a child is assessed as being able to give a possession to someone else, the teacher would record that the child has achieved the prosocial behavior of A. empathy. B. caregiving. C. generosity. D. cooperation
asked by Anonymous 
Math
Jeff earns 1200 per week and has 4 deductions what is his net pay
asked by Rhonda 
maths urgent
show that √Π+1 is irrational if there is any proof
asked by anoynomous 
physical science
How much energy is stored in a 9V battery rated at 10 A hour?
asked by jake 
Biology
Consider this pathway: signaling ligand ¨ G proteincoupled receptor ¨ G protein ¨ adenylyl cyclase ¨ cAMP. Identify the second messenger. Answer: A)G protein B)GTP C)adenylyl cyclase D)cAMP
asked by Sasha 
maths urgent
what is the value of sin18degreesin66degree+(root3/2)
asked by anoynomous 
environmental science
is plastic use is more hazarduous or wood use in relation to their environmental impacts? kindly give me a detailed answer
asked by ejaz 
Algebra
In 2000, in Country A, the average family net worth was $410,000, and there was about 6.1 x 10^7 families. Calculate the total family net worth Country A in 2000. Country A's total family net worth is what in dollars?
asked by Jamal 
chemistry
A student needs to use a 0.750 mol sample of (NH4)2SO3 for an experiment: a. how many grams does she need to weigh out? b. how many formula units are in the sample?
asked by Jillian 
math literacy
calcuate your answer in simplest form 350(21+11)
asked by miso 
Stats
A game is played where a biased coin is flipped. A head is twice as likely as a tail. It costs $5 to plat the game and if a head occurs you win &7 but if a tail occurs you pay $3 which of the following is correct? The game is fair The expected valve of net
asked by Varonica b. Miller 
LIfe Orientation
critically discuss 8 ways in which the environmental problem impact on the within your country with South Africa
asked by Beverlyn 
LIfe Orientation
what recommendations can I address on the air pollution
asked by Nicole 
car!
Which one of these statements is true about a "bumpertobumper" warranty. A. Normal wear and tear is NOT covered by the warranty. B. All expenses except gasoline and routine oil changes are covered by the warranty. C. Every part and system is covered
asked by carrie 
maths
There is an auction for a house, with a List Price of $100K. There are only two bidders, who bid randomly, one after another. Their bids are in the $0 to $100K range. They don’t know what the other person bid (even if they did, it wouldn’t matter cause
asked by nkm 
Math
Help if you can! Thanks! Appreciate it! The length of one side of a square is approximately 181 inches. Which could be the length of one side of the square? A. 13.5 inches B. 19 inches C. 90.5 inches D. 109 inches
asked by MidsummerNight'sDream 
Math
Help please! I would greatly appreciate it! Sarah is making pillows. She uses 2 1/3 yards of fabric to make 5 pillows. How many yards of fabric will Sarah use to make 20 pillows? A. 6 1/3 yd B. 9 1/3 yd C. 17 1/3 yd D. 42 6/7 yd P.S. Thanks!
asked by TheTempest 
Psychology
According to the allornone law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual
asked by Angela 
Psychology
Good day , please can you assist me with answering the following questions. There is a short paragraph describing a young man who has OCD symptoms. the questions are as follows "According to the DSM IV diagnostic categories what diagnosis might you give
asked by CATHY 
Psychology
Information which comes to a neuron must arrive through its: A. axons. B. glial cells. C. prefrontal area. D. dendrites. I believe it is D..
asked by Angela 
Calculus
Find the equation of the line tangent to F(x) = xe^x at the point where x = 0. What does this tell you about the behavior of the graph when x = 0?
asked by Tima 
Math
Needing help! Oliver made a pizza that was the same size as the pizza pan he used. The area of the pizza pan was 16(pie sign) square inches. What will be the circumference, in inches, of his pizza? A. 4 (pie sign) inches B. 8 (pie sign) inches C. 16 (pie
asked by AsYouLikeIt 
Psychology
According to the allornone law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual
asked by Angela 
chemistry
Which of the following statements describes why ion exchange of 99% SiO2  1% B2O3 in a salt bath of molten postassium chloride (KCl) is not an effective way to increase the surface strength of the glass sample? a The ion exchange works correctly, however
asked by adex 
Psychology
Danette knows she is not at all like her parents. She could never be like them. She is her own unique person. Her style of dress, mannerisms, and language emphasize her uniqueness. According to Erkison, Danette is attempting to establish: A. permanence. B.
asked by Angela 
Psychology
Four weeks from conception, cell division: A. begins to slow down. B. has resulted in an embryo which is 10,000 times larges than the zygote. C. creates a zygote. D. moves to the fetal period. I believe it is B
asked by Angela 
U.S/history AP
The Revolutionary war began with the battle of Lexintgton and Concord in 1775 and ended in the year 1783 with the signing of the treaty of paris .American troops were commanded by. my answer: George Washington right?
asked by joy 
Biology
The body of multicellular animals (salamanders, frogs and so on) is made of more than hundred different kinds of somatic cells. Even though they’re so different, they all have the same genome (the same DNA, the same set of genes). This is called genomic
asked by S 
physical geography
given the temperature of 27 degrees celsius on a climograph was is the averge monthly prepicipation 24.4 cm
asked by denise 
SCIENCE ASAP please
1. Density is the relationship between ____. (1 point) mass and volume cubic centimeters and pounds weight and volume grams and mass 2. Which of the following is NOT a possible sign of a chemical change? (1 point) a change in state a change in color the
asked by Delilah 
URGENT LANGUAGE ARTS URGENT~!
Which answer explains why there isn’t a hyphen between well and behaved in the following sentence? The students were so well behaved that Ms. Irvin dismissed them early. (1 point) The words well and behaved don’t end in ly. The words well and behaved
asked by Gabby 
physics
What is the maximum current allowed in a 7.5 W, 300 resistor?
asked by Noah 
chemistry
How many moles of sodium hydroxide are needed to react with 148.0 g of Iron (III) bromide?
asked by Taylor 
URGENT language arts question~!
Which of the following compound words is spelled incorrectly? (1 point) afternoon teamate masterpiece earring My Answer: 1)B Is this correct? .
asked by Gabby 
Calculus
The present value of a building in the downtown area is given by the function p(t) = 300,000e^0.09t+(t)/2 f or 0 _< t _< 10 Find the optimal present value of the building. (Hint: Use a graphing utility to graph the function, P(t), and find the value of t0
asked by Deeno 
Calculus
The present value of a building in the downtown area is given by the function p(t) = 300,000e^0.09t+(t)/2 f or 0 _< t _< 10 Find the optimal present value of the building. (Hint: Use a graphing utility to graph the function, P(t), and find the value of t0
asked by Deeno 
math
solving with elimination 7x4y=13 2x5y =4
asked by anatoliy 
math
how to solve this problem ln(x4)=3
asked by teresa 
Life Orientation
Identify 5 ways in which environmental or ill health factor impacts on community
asked by Anonymous 
Calculus
Use the Evaluation Theorem to find the exact value of the integral ç^6 2 2x+1dx 1) What is the antiderivative? 2)What is theupper and lower limit? 3) Give final answer.
asked by Sasha 
math
how to go by doing a personal cash flow statement is it like the regular budgetfor your house.
asked by dean 
Mathstrig
Prov that 1sin2X/sinXcosX=sinXcosX
asked by Neo 
algebra
(1)√xa/xb + a/b = √xb/xa + b/a, b not equal to a, then value of x is (2) if x = 2√24/√3+√2 then value of x+√8/x√8 + x+√12/x√12 . (3) if a = 2+√3/2√3 & b = 2√3/2+√3 then value of (a square + b square + ab) =
asked by chandrakant 
PreCalc
How do I solve this via partial fraction decomposition? (x^2+9)/(x^42x^28)
asked by Micki 
Calculus
An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
asked by Bryan 
Chemistry
Potassium hypobromite, KOBr, converts ammonia to nitrogen by the following reaction. 3KOBr + 2NH3 N2 + 3KBr + 3H2O To prepare 448.2 mL of dry N2, when measured at 22.3 °C and 777.3 torr, what is the minimum number of grams of KOBr required?
asked by Paxton 
Chemistry
Potassium hypobromite, KOBr, converts ammonia to nitrogen by the following reaction. 3KOBr + 2NH3 N2 + 3KBr + 3H2O To prepare 448.2 mL of dry N2, when measured at 22.3 °C and 777.3 torr, what is the minimum number of grams of KOBr required?
asked by Paxton 
chemistry
A sample of hematite Fe2O3 has the mass 4.83 x 10 3 kg. a. how much iron (kg) can be extracted from this sample of hematite? b. what is the percentage of iron in this ore?
asked by Jillian 
Calculus
Estimate the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles?
asked by Molly 
Maths
Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠BAC=30∘. What is the area of triangle ABC?
asked by Ian 
maths
Find the number of positive integers
asked by rohit 
maths plseee urgently
value of sin18degreesin66degree+sin60 degree
asked by anoynomous 
life orientation
3 environmental health hazards that cause ill health,crises,and or disasters globally
asked by velile 
English
Having problems with a introductory sentence. Its a essay on dying and living. I wrote a question to start my intro. Sentence. Or I wrote The professor died in 1974 of Cancer. Someone please let me know if I started out right. Please
asked by Mike 
physics
A bead of mass m = 40.5 kg is released from point A which is located 5 m above the ground and slides on the frictionless track as shown in the figure. Determine the beads speed when it reaches point C which is located 2.0 m above the ground.
asked by robert 
Math
Please help if you will! (5)x76+8 A. 49 B. 45 C. 33 D. 25 P.s. Thanks for the help!
asked by MuchAdoAboutNothing 
Physics
Consider a regular pyramid charged with constant volume charge density. The potential at point P, the top of the pyramid is 1V. What would be the potential at point P if we removed the top part, so the pyramid is instead truncated at a height h=0.6H? Hint:
asked by Ian 
maths
if n is any integer ,then in is (a) i,(b) 1,1 (c) i,i (d) 1,1,i,i
asked by simran 
Calculus
Find the derivative for the following: a. y = x^2 e^x b. y = (e^x + 2)^3/2 c. y = e^3x d. y = (e^xe^x)/2
asked by Nuru 
algebra
(1)√xa/xb + a/b = √xb/xa + b/a, b not equal to a, then value of x is (2) if x = 2√24/√3+√2 then value of x+√8/x√8 + x+√12/x√12 . (3) if a = 2+√3/2√3 & b = 2√3/2+√3 then value of (a square + b square + ab) =
asked by chandrakant 
Calculus
Find the volume using the shell method  about the xaxis x=y^2/3
asked by Tiffany 
Calculus
The velocity of an object t seconds after it started moving is t(t6). Find the total change in the object's position in the 6th second.
asked by Katie 
Maths
Let N=1!⋅2!⋅3!⋅4!…9!⋅10!. Let 2^k be the largest power of 2 that divides N. What is the value of k?
asked by Ian 
Biology
Humans have about 20,000 genes in our genome. Explain how cells differentiate into different kinds of cells even though they have the same set of 20,000 genes in their nuclei, so they are genetically identical.
asked by Student 
Maths
Two players each flip a fair coin. The probability that they get the same result can be expressed as ab where a and b are coprime positive integers. What is the value of a+b? Dont get the a+b :(
asked by Ian 
physics
Just wanted to say a quick thanks to Steve and Damon, figured it all out, thanks guys, awsome!!!
asked by Chad 
8th Grade Math
I need help on the following please? A group of clowns performs in a ring with an area of about 2,123 square feet. What is the circumference of the ring? Choose the closest answer. 156 ft. 52 ft. 163 ft. 82 ft. Thank You. Please explain the answer
asked by Christopher 
U.S/history AP
After TX achieved independence they wanted to be brought into U.S.Because it would upset the balance of free and slave states that not happen until 1845. In 9 years between independence and entering the U.S.they were a socerign nation called
asked by joy 
maths urgent
show that √Π+1 is irrational
asked by anoynomous 
Help Needed! Precalculus
Find all solutions to cos(8alpha)cos(2alpha)=sin(5alpha) on 0 less than or equal to alpha less than (2pi)/3
asked by anonymous 
Psychology
__________ serve as the cytoskeleton of the brain. They support the function of neurons by insulating, repairing, and nourishing them. A. Glial cells B. Dendrites C. Axons D. Cell bodies i say it A
asked by Angela