Questions Asked on
October 12, 2013

science
I am doing a titration lab and need help with a problem. (i used .100M H2SO4)(I used 10.0 ml of Ba(OH)2 solution and added 50.0 ml of distilled water making 60.0 ml total.) 1. Use the titration results to calculate the moles of H2SO4 that were used to
asked by Charles 
math models
If $3800 is invested in a savings account for which interest is compounded quarterly, and if the $3800 turns into $4300 in 2 years, what is the interest rate of the savings account?
asked by pamela 
CHEMISTRY.....AND THIS IS IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then
asked by Anonymous 
math
The annual budget projection for a large manufacturing firm includes: Division A $24,345,500 Division B $13,927,750 Division C $752,000 Division D $695,800 Estimate the total budget in millions of dollars.
asked by kit 
Physics Urgent please help
Consider an ideal spring that has an unstretched length l_0 = 3.5 m. Assume the spring has a constant k = 36 N/m. Suppose the spring is attached to a mass m = 8 kg that lies on a horizontal frictionless surface. The springmass system is compressed a
asked by akha 
science
on a winter day the temperature drops from 15c too 25C overnight. if a pan sitting outside contains 0.50 kg of ice, how much heat is removed from the ice for the temperature change?
asked by Anonymous 
math
A painter leans a 15 foot ladder against the side of a house. The top of the ladder touches the house at a height that is 3 feet more than the distance from the house to the bottom of the ladder. How far is the bottom of the ladder from the house?
asked by ashley 
College probability and statistics
The current license plates in New York State consist of three letters followed by four digits. ( i ) How many possible distinct license plates can there be? ( ii ) How many possible distinct license plates could there be if the letters O and I and the
asked by Melissa 
Physics
can someone help i'm stuck on two questions??? 23. On a velocitytime graph, when is the object not moving? when the slope is a straight line rising to the right when the slope is a straight line falling to the right when the slope is a line curving upward
asked by Mary Ann 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. 1)How many students would you expect to have weight between 162 pounds and 178 pounds? 2)What is
asked by Jacky 
Mathematics
Show that cos (θ40) = sin (θ+50). Hence, or otherwise, solve the equation cos(θ40) = sin(θ+50), giving all solutions between 0° and 360°.
asked by WesleyCrusher 
physical
A bicycle and its rider together has a mass of 95 kg. What power output of the rider is required to maintain a constant speed of 4.8 m/s (about 10.7 mph) up a 5.0% grade (a road that rises 5.0 m for every 100 m along the pavement)? Assume that frictional
asked by laila 
STAT
Assume that women’s heights are normally distributed with a mean given by µ = 64.6 inches and standard deviation given by σ = 2.2 inches. What area under the normal curve corresponds to the probability that a woman’s height is between 63.7 inches and
asked by Jacky 
Pre Algebra
The area of a square postage stamp is 81/100 in. squared. What is the side length of the stamp? What is the formula of the area of a square?
asked by Steve 
physics
An electron moving parallel to the x axis has an initial speed of 3.66 ✕ 106 m/s at the origin. Its speed is reduced to 1.40 ✕ 105 m/s at the point x = 2.00 cm. Calculate the potential difference between the origin and that point. ΔV =
asked by smita 
Psychology/ Ms Sue
Are my answers correct Ms Sue? 1. One of the characteristic features of schoolage children is that they are more likely than younger children to try to conform to peer standards in such matters as clothing and language? True 2. School age children have a
asked by Lisa 
physics
An oil drop ‘B’ has charge 1.6 × 10−19 C and mass 1.6 × 10−14 kg. If the drop is in equilibrium position, let 10 k be the potential diff. between the plates. [The distance between the plates is 100 mm] Then what is the value of k.
asked by preet 
Math
Lactose (MW:342 amu) makes up the vast majority of the carbohydrate. Calculate the molarity of lactose in buttermilk and compare it to that of protein.
asked by Abi 
Math Probabilities
A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this
asked by Alex 
Physics
A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)
asked by Mehrin Ali 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds? What is the
asked by Jacky 
Chemistry
The rate constants for a reaction are found to be k(35 C) = 1.0 x 103 s1 k(25 C) = 2.0 x 103 s1 At what temperature (in degrees C) will the rate constant be 3.79 x 103 s1?
asked by ss01 
Probability
A survey of TV viewing habits of 50 men and 50 women found the following information: Of the 50 men, 20 prefer watching baseball and 30 prefer football. Of the 50 women, 25 prefer watching baseball and 25 prefer football. Construct a data table for this
asked by Alex 
Math
state the amplitude, period, frequency, phase shift and vertical shift of each function, Then graph two periods of the function of: 1) y=3 sin(xpie/4) 2) y=0.25cosx+3
asked by Sydney 
chemistry
Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite? you have 1 mol of Al2O3 n 1 kg....I still don't get it.
asked by LC reply to DrBob222 
English
Hi this a rebus, can you answer it? TEEXAMRM
asked by Tim 
math
A sample of 148 of our statistics students rated their level of admiration for Hillary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06, and the standard deviation was 1.70. (For this exercise, treat this sample as the entire population of
asked by eid2013 
CHEMISTRY...IMPORTANT
2. If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L of octane vapor, C8H18? b. what volume of each product is produced? 25L C8H18 x (25 mol O2/2 mol C8H18) = 312.5 L O2 (if it were pure O2). Then
asked by Anonymous 
chemistry
Aluminium is manufactured by electrolysis(electrolytic decomposition) of bauxite, Al2O3. How much aluminium can be obtained from 1kg of pure bauxite?
asked by LC 
math
Our statistics students, as noted in Exercise 6.32, were asked to rate their admiration of Hillary Rodham Clinton on a scale of 1 to 7. They also were asked to rate their admiration of Jennifer Lopez and Venus Williams on a scale of 1 to 7. As noted
asked by eid2013 
econ600
As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople). You are considering hiring from 5 to 10 additional
asked by rabiah 
Math
A shopper asked for 50 cents worth of apples. The shopper was surprised when she received ﬁve more than the previous week. Then she noticed that the price had dropped 10 cents per dozen. What was the new price per dozen?
asked by Chris 
Quantum Physics
We will carry out some steps of the quantum factoring algorithm for N=91 (a) What is the period k of the periodic superposition set up by the quantum factoring algorithm if it chooses x=8? I.e. what is the period of f(j)=8j(mod91) (b) Using your answer to
asked by ss01 
managerial accounting
Which of the following costs is an example of a cost that remains the same in total as the number of units produced changes?
asked by leweis 
Survey Math
A survey of 240 10th grade students in a local High School found that there were 140 girls and 100 boys in the grade. Of the 140 girls, 100 preferred gym class while 40 preferred art class. Of the 100 boys, 40 preferred gym class while 60 preferred art
asked by Alex 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds?
asked by Jacky 
Math
Rose has a square garden with an area of 49 square feet. She wants to put a fence around her garden. How much fencing does she need to purchase?
asked by Brad 
biology
is trypsin inhibitor competitive or noncompetitive
asked by Cristian 
English
Hi this is a rebus can you answer it? ECNALG
asked by Tim 
physics
Calculate the speed of an electron that is accelerated through the potential difference of 123 V.
asked by smita 
maths
The Number Two Plumbing Co. charges $45 per hour plus a fixed service call charge of $65. Write an equation that will allow you to compute the total bill for any number of hours, x, that it takes to complete a job. A. C = 45x + 65 B. C = 65x + 45 C. 65x +
asked by mdan 
biochemistry
) Anthranilate fluoresces blue under ultraviolet light. Under normal conditions, the levels of anthranilate in bacterial cells are low and the cells do not visibly fluoresce. However, if anthranilate accumulates because a relevant enzyme is defective or
asked by Anonymous 
math
how many lines of symmetry does a pentagon have?
asked by Steve 
physics
a javelin thrower wished to obtain a record of throwing 100 m on a flat level ground. if he hurls the javelin at 45 degrees from the horizontal, what initial speed must the javelin have?
asked by Joe 
Chemistry
Determine the minimum potential that must be applied to a proton so that, on interaction with a hydrogen atom, it can excite the ground state electron to a state of n=3 please tell steps in brief
asked by ss01 
Quantum Physics
Suppose you are given an endless supply of qubits in the state 12√00⟩+eiϕ2√10⟩. To estimate the phase angle ϕ, you run Fourier sampling (i.e. Hadamard on each qubit followed by a standard basis measurement) on this state repeatedly. After
asked by ss01 
Chemistry
Which substance ( HBr or HF ) has the higher boiling point? Its HF but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more
asked by ss01 
math
6.22 A study of the Consideration of Future Consequences(CFC) scale found a mean score of 3.51, with a standard deviation of 0.61, for the 664 students in the sample(Petrocelli, 2003). For the sake of this exercise, let’s assume that this particular
asked by eid2013 
CHEMISTRY
18cm^3 of 1.0M H2SO4 just reacted with 24cm^3 of 1.5M NaOH to form sodium sulfate & water. Calculate the amounts in moles of sulfuric acid & sodium hydroxide reacting & write an equation for the reaction.
asked by Janey 
Quotes
I'm doing this essay, and I would really like a few names on women who have gone to war and a couple of their quotes. Thanks
asked by Kelsi 
STAT
A researcher is examining the relationship between color preference and gender. A sample of 30 men and 30 women is obtained and each person is asked to identify his/her preference between two choices of paint colors for a new student lunge. For this
asked by Jacky 
Chemistry
Element L has an average atomic mass of 54.2488 amu and is composed of two isotopes. The first has a mass of 55.2036 amu and makes up 41.030% of a standard sample. What is the mass of the second isotope? I under how to get average atomic mass but not sure
asked by Star 
MATH
IN LOCAL TOWNS 4/5 OF THE VOTING AGE POPULATION IS REGISTRED TO VOTE 11/16 OF REGISTRED VOTERS IN ELECTION FOR MAYOR WHAT FRACTION OF THE VOTING AGE POPATION VOTED.
asked by ROSHANDA PLUMMER 
Chemistry
Assume for fluorine a relative electronegativity of xp=4.0, determine xcarbon. [Given: BECC=347 kJ/mol; BEFF=155 kJ/mol; BECF=429 kJ/mol.
asked by ss01 
English
Hi this is a rebus, can you answer it? KNEE LIGHT
asked by Tim 
Chemistry
Which substance ( HI or Xe ) has the higher boiling point? Its HI but chose one of the most appropriate reason. 1. Both substances are nonpolar but the higher boiling includes hydrogen bonding 2. Both substances are nonpolar but the higher boiling is more
asked by ss01 
Physics
A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)
asked by Mehrin Ali 
Physics
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 61kg person develops a power of 75 W during a race, how fast is the person running?
asked by Anonymous 
maths
Write the equation of the line passing through (0, –5) and (0, 1). A. x = 0 B. y = 0 C. y = x + 0 D. y = 6x My answer is B , am i correct
asked by mdan 
Math
The probability of pulling a heart or a red card from a deck of cards is?
asked by Alex 
Algebra 2
For the first time customers, a bank will open an account with $25 included. This bank also charges a monthly $2.95 service fee on the account. Write an equation that shows the balance B after m months, assuming no other activity is made on the account.
asked by Kelsey 
Algebra
8(v8)2v=28
asked by Tracy 
math
every number greater than 2 can be written as the sum of two prime numbers. 22=3+19 or 22=11+11 write the even number from 80 to 96 adbthe sum of two primes in atleast one way.
asked by Anonymous 
7th Grade Science
Hi, I understand the question but every vocab. word I think this is it's just not coming out right when I'm putting it all together. Question:To pass a trait on to the next generation (offspring) an organism does what? My answer is heredity, but to me when
asked by Anonymous 
Chem104
Calculate the specific heat \((\rm{J/g \; ^\circ C})\) for a 18.5\(\rm g\) sample of tin that absorbs 183 \({\rm J}\) when temperature increases from 35.0 \(^\circ \rm C\) to 78.6 \(^\circ \rm C\).
asked by Thobile 
Criminal justice
What would be the hypothetical example of modern day burglary?
asked by Amy 
Chemistry
What is the pressure of the gas in a manometer if the height in between is 71mm and the atmospheric pressure is 761mmHg?
asked by Chelsea 
Physical Science
You are running a race and you speed up from 3 m/s to 5 m/s in 4 seconds. a. What is your change in speed? b. What is your acceleration?
asked by unknown 
Physical Science
The Earth moves in a nearly perfect circle around the Sun. Assume the speed stays constant. Is the Earth accelerating or not?
asked by unknown 
physics
A. A particle is traveling without friction up and down hills and valleys. If its initial potential energy is 6 J and its initial kinetic energy is 78 J, what is its total energy, E? E: J B. If at a later point its potential energy is 14 J, what is its
asked by carol 
math
Give three reasons why z scores are useful.
asked by eid2013 
biology
movement of water molecules across the cell membranes from hypertonic to hypotonic solution . whether it is osmosis or diffusion?. please clarify.
asked by ramesh reddy 
maths2
Test the equation for symmetry with respect to the xaxis, the yaxis, and the origin. x2 + y2 + x2y2 = 4 A. Symmetric with respect to the xaxis B. Symmetric with respect to the yaxis C. Symmetric with respect to the origin D. Symmetric with respect to
asked by mdan 
maths
they say bongani buys 1 litre of milk and drinks a quarter of it and dey wnt to knw wht fraction of the litre of milk is left,and dey say bongani offers another 3eighths of the leftover milk to his sister bongiwe n dey wnt to knw wht fraction of de litter
asked by lesego 
algebra
(x0.2)(x+0.2)
asked by Anonymous 
Biology of Environment
Im having hard time differentiating b/w inductive and deductive reasoning. In inductive you find patterns, then you reach conclusion, in deductive you reach conclusion based on previous known facts, but i still not quite understand. I also not get the
asked by Mohammad 
math
a steamship has length of 8783/4 feet it's width at widest point is 991/2 feet how much grater is it's length than it's width
asked by roshanda 
english 28
I am writing a persuasive essay on americanization and I cant think of a thesis statement
asked by rebecca jones 
math
point a (8, 10)is reflected over the y axis. What are the coordinates of A prime?
asked by Steve 
math
Is a triangle with sides of 25,20, 15 a right triangle?
asked by Steve 
Quantum Physics
Suppose you are given an endless supply of qubits in the state (1/√2)00>+(e^iϕ/√2)10>. To estimate the phase angle ϕ, you run Fourier sampling (i.e. Hadamard on each qubit followed by a standard basis measurement) on this state repeatedly. After
asked by None 
Language arts
because proctor did not know the six commandment then
asked by rrrrrr 
Math, Factoring
Factor: 121x^2+110x+25
asked by Oliver 
English
He was reading about diamonds when his father entered his room. (Was he reading a book, or was he reading passage about diamonds on the Internet?)
asked by rfvv 
math
if the coefficient of x,x*x,x*x*x in the binomial expansion (1/2+x) whole raise to 2n are in AP. Show that 2nsquare 9n +7 is equal to zero?
asked by sandra 
PhysicsHelp Please!
a 25gram bullet is fired upward through a .36kg block. the block goes up 17cm in the air and the bullet goes up 24m into the air. What is the initial velocity of the bullet?
asked by Sara 
Math ASAP
Could you please help me on this problem, i'm kinda stuck on it and can't find the same base. These are exponents (9^2x1) = 6^x Thanks for helping me! ST
asked by ST 
physics
If you accelerate due to gravity (free fall), your acceleration is 9.8 m/s2. In some fields, particularly aviation, this is referred to as 1 g of acceleration. If you were accelerating at 2.5 g, what would be your average acceleration? If you started from
asked by iyzi 
STAT
Given a sample size of 18, with sample mean 660.3 and sample standard deviation 95.9, we are to perform the following hypothesis testing: Null Hypothesis H0 : µ = 700 Research Hypothesis H1 : µ ≠ 700 •What is the test statistics? •At a 0.05
asked by Jacky 
STAT
The score on a test are normally distributed with a mean of 75 and a standard deviation of 6. If the professor wishes to give A’s to the top 4%, what would be the cutoff score be for A’s?
asked by Jacky 
algebra
Multiply (x+3)(x3)
asked by Anonymous 
History
can someone clarify this statement for me.. President Lincoln was a reluctant, censor closing newspapers and jailing "copperhead" editors who sympathized with the South, giving credence to the notion that war sometimes necessitates compromises of free
asked by Blaze 
Chemistry
What volume of a liquid having a density of 4.55 g/cm3 is needed to supply 10.47 grams of that liquid? Answer in cm3.
asked by Andy 
Greek Mythology
I'm doing a mini report on Athena, goddess of war, and if you have any links to help me accomplish this it would be very much appreciated. :)
asked by unknown 
algebra 1
solve the equation 2x+1=52x can you please show me some videos of how i can solve them
asked by loli 
Logic
Having trouble with these two 1. 1 ~J 2 (B ⊃ M) ⊃ (~J ⊃ B) 3 ~J ⊃ (B ⊃ M) / B 2. 1 ~L 2 V v (A v L) 3 (V v A) ⊃ ~V / A
asked by Rick 
Physical Science
Suppose you are moving left (negative) with a velocity of 10 m/s? What happens to your speed if you have a negative acceleration? Do you speed up or slow down?
asked by unknown 
English
1. You are out of breadth a lot. 2. You are very out of breadth. 3. You are much out of breadth. 4. How aout of breadth you are! (Which one is grammatical? Which one is similar to #4? What other expressions can we us instead of 'out of breadth.?)
asked by rfvv 
physics
The mass of an unloaded car is 800 kg. The body of the car will sink 6 cm after getting in 5 persons of total mass of 500 kg. How much is the time of period of vibration of the unloaded car and loaded with passengers?
asked by Anonymous 
English
The stolen necklace is insured for five million dollars. (What is the meaning of the role of 'for' in this sentence? What else can we use instead of 'for' ?)
asked by rfvv 
Chemistry
What are the equations for these two equations? Not net ionic equations. a) Nickel (II) chloride and iron b) Sodium and water
asked by Matt 
English
Hi this is a rebus question, can you answer it? ECNALG
asked by Tim 
English
1. So the necklace on his desk had to be the real diamond necklace. 2. So the necklace on his desk must have been the real diamond necklace. (Does #1 mean #2? What is the difference between them?) 3. He must be strong. 4. He has to be strong. (Are both
asked by rfvv 
Physics
A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E)
asked by Mehrin Ali 
Maths
For 2 sets X={1,2,3,4},Y={−15,0,30}, f is a surjective function from X to Y. If f(1)=−15 and f(2)=f(4)=0, what is f(3) ?
asked by CHRIS 
science
I'm doing a project on chocolate I need help how to start the project
asked by britney 
science
A decrease in “food miles” will most likely increase the environmental impact of any given food. (Points : 1) True False
asked by Anonymous 
Card Probability
The probability of pulling an ace or king from a deck of cards is?
asked by Alex 
SAT MATH
if x^2  y^2 = 77 and x + y=11 what is the value of x?
asked by Paula 
physics
for the hydrulic lift shown,what must be the radio of the diameter of the vessel at the car to the diameter of the vessel where the force F,is applied so that a 1.52x10^3 gr car can be lifted with a force F,of just 0.125kN?
asked by Anonymous 
STAT
Lucinda used ANOVA to test if there were statistically significant differences between the five conditions of her independent variable. There were 8 participants in each condition. Her obtained Ftest (df between = 4, df within = 30) was F = 10.897/3.72 =
asked by Jacky 
STAT
A certain personality index postulated by Professor Bailey is normally distributed, with a mean of 0.4 and a variance of 0.0004. What is the probability that the Professor Bailey’s personality index of a randomly selected person will exceed 0.44?
asked by Jacky 
STAT
The Cox family has 4 boys. •What is the probability of a 4child family having 4 boys? •What is the probability that the next child of the Cox family will be a boy, given that they have already 4 boys in a row?
asked by Jacky 
religion/theology
i have to make a prayer video and i don't know what to make it about, please help! thank you
asked by allie 
gc chemistry
What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption of polar species. Also fronting can occur if too much sample is added but these are the only things i can think of that would
asked by Instrumental 
Biology of environment
What does dynamic equlibrium population growth mean?
asked by Mohammad 
algebra
Evaluate the polynomial for x=3 and x=3 4x^31/9x^4
asked by Anonymous 
algebra
multiply (1/2y^2)(3/5y^8
asked by Anonymous 
algebra
multiply 8x(6x^24x+1)
asked by Anonymous 
algebra
(a+1((a+1)
asked by Anonymous 
maths
bongani buys 1 litre of milk and drinks a quarter of it. what fraction of the litre of milk is left? bongani offers another 3 eighths of the leftover milk to his sister bongiwe what fraction of the litre of milk is left?
asked by lesego 
schul projekt
hallo,ich brauche hilfe beim projekt. ich muss reisekataloge über islas canarias spaniens insel im atlantik recherchieren. könnt ihr mir helfen und schreib auch die internet adresse wo ihr es herraus gefunden hat danke schön
asked by priyanka