Questions Asked on
February 19, 2012

chemistry
Assuming equal concentrations, rank these aqueous solutions by their freezing point.? K2CO3, Li3PO4, Sn(ClO3)4, NH4I I tried to rank them according to the number of ions but i can't get it. highest freezing point > lowest freezing point Sn(ClO3)4 >
asked by Eric 
Chemistry hw
Assuming 100% dissociation, calculate the freezing point and boiling point of 3.13 m SnCl4(aq). Tf=? Tb=? My work: SnCl4 with 100% dissociation gives a van't hoff factor of 5, 1Sn 4+ ion and 4 Cl ions deltaT = i x Kf x m for freezing point = 5 x 0.51C/m x
asked by Akle 
consumer math
1. Which of the following is an advantage of using credit cards? (Points : 1) Credit card accounts charge monthly interest. It is very easy to charge more than you can pay off each month. If you pay late, you will be charged a late fee. They are
asked by josh patterson 
Chemistry
Express the concentration of a 0.0510 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the desnity of the solution is 1.00 g/mL Since, we're assuming the density I think that also means were assuming the volume.. but
asked by Joy 
Chemistry
Given that the vapor pressure of water is 17.54 torr at 20 C, calculate the vaporpressure lowering of aqueous solutions that are 2.40 m in (a) sucrose, C12H22O11, and (b) aluminum chloride. Assume 100% dissociation for electrolytes. Sucrose Delta P = __
asked by David 
Physics
A uniform meter rule of mass 100g balance at a 40cm mark when a mass x is placed at the 10cm mark.What is x?
asked by Abubakar 
computer science
Declare a structure whose tag name is Emp and that contains these fields (in the following order): a double field named d, a character pointer named str, and an array of eleven integers named arr. * I'm good till here. In addition, declare a array named
asked by Cheryl 
geometry
A slide 4.1 meters long makes an angle of 35 degrees with the ground. To the nearest tenth of a meter how far above the ground is the top of the slide. Could someone please explain don't want just answer would like to know how to do the work.
asked by Brandon 
Chemistry
A solution is made by mixing 42.0 mL of ethanol, C2H6O, and 58.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 C in torr? Values at 20C ethanol density: 0.789 g/mL & vapor pressure (torr): 43.9 torr water: denisty:
asked by Joy 
Chemistry
Bauxite ore contains aluminum oxide Al2O3(s) which is decomposed using electricity to produce aluminum metal and oxygen gas. What mass of aluminum metal can be procuced from 155g of aluminum oxide?
asked by Hannah 
Algebra
The Oliver Company plans to market a new product. Based on its market studies, Oliver estimates that it can sell up to 4,500 units in 2005. The selling price will be $2 per unit. Variable costs are estimated to be 20% of total revenue. Fixed costs are
asked by Rick 
Physics
1. While riding on an elevator descending with a constant speed of 1.5 m/s, you accidentally drop a book form under your arm. (a) How long does it take for the book to reach the elevator floor, 1.2 m below your arm? (b) What is your book's speed relative
asked by Priscilla 
precal
Some biologists model the number of species S in a fixed area A (such as an island) by the speciesarea relationship log S = log c + k log A where c and k are positive constants that depend on the type of species and habitat. (a) Solve the equation for S.
asked by melek 
Algebra
Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars) for a run of x pairs of cleats is C(x) = 3000 + 9x + 0.1x2 (0 ≤ x ≤ 500). Gymnast Clothing sells the cleats at $130 per
asked by Nick 
Geometry
Please help. The scale factor of ^RST to ^DEC is 3:13. What is the scale factor of ^DEC to ^RST?
asked by myles 
Physics
A computer is reading data from a rotating CDROM. At a point that is 0.0368 m from the center of the disk, the centripetal acceleration is 274 m/s2. What is the centripetal acceleration at a point that is 0.0781 m from the center of the disc?
asked by Alex 
Chemistry
What is the equilibrium partial pressure of water vapor above a mixture of 37.5 g H2O and 62.5 g HOCH2CH2OH at 55 degree C. The partial pressure of water at 55 degree C is 118.0 mm Hg. Assume ideal behavior for the solution.
asked by Nurcan 
American history
"All powers not delegated to the United States by the Constitution . . . are reserved to the States respectively, or to the people." This language, drafted by _______ and incorporated into the _______ Amendment of the Bill of Rights was intended to address
asked by enev 
math
How can you use subtraction to complete an addition pattern? use this exercise as an example: 32, 39, 46, 53, 60, 67.
asked by jess 
Chemistry(Please check)
The initial concentration of a reactant in a first order reaction is 0.620 molar. What will be its concentration after 3 halflives? I did 0.620 > 0.31 >0.155 0.155M will be the concentration. Is this correct?
asked by Hannah 
Algebra
The RideEm Bicycles factory can produce 140 bicycles in a day at a total cost of $10,200 and it can produce 160 bicycles in a day at a total cost of $10,900. What are the company's daily fixed costs? What is the marginal cost per bicycle?(How do I find
asked by Sandie 
Geometry
1.) what is the length of the line segment whose endpoints are (1,1) and (3,3)? 2.) what are the coordinates of the midpoint of the line segment whose endpoints are (c,0) and (0,d)?
asked by Taylor 
Math
The sides of parallelogram 2x+y,3y2x,5y8,4x3 are given in cm.find x and y and the perimeter of the parallelogram
asked by Maccbath 
Physics
Romeo takes a uniform 15.0m ladder and leans it against the smooth (frictionless) wall of the Capulet residence. The ladder's mass is 20.2 kg and the bottom rests on the ground 3.07 m from the wall. When Romeo, whose mass is 70 kg, gets 93.2 percent of
asked by Jerry 
geometry
In the figure below, the measure of arc AC is 88 degrees if angle ABC is equal to 88 degrees.
asked by bob 
physics
An airplane starts from rest at the end of a runway and accelerates at a constant rate. In the first second, the airplane travels 1.11 m. What is the speed of the airplane at the end of the second second?
asked by suri 
PLEASE HELP 2
A midpoint of sequence of numbers. A. Mean B. Median C. Mode D. Zero I GOT B
asked by kesha 
HELP 6
Combinations of some type of designs or styles. A. Structures B. Patterns C. Numbers D. Conjectures B
asked by kesha 
Chemistry
A solution is made by dissolving 0.500 mol of HF in enough water to make 1.00 L of solution. At 21 C, the osmotic pressure of the solution is 1.35 atm. What is the percent ionization of this acid? This is what i did.. is it correct? (1.35 atm) =
asked by Eric 
Chemistry
An aqueous KNO3 solution is made using 72.5 grams of KNO3 diluted to a total solution volume of 2.00 liters. If the molarity of the solution is .359 M and the molality of the solution is .354, what is the mass percent of the solution?
asked by Adam 
CHEMISTRY
Predict the products of the following reactions. a)CH3CH2CH2CH3+O2> B)CH3CH2CH2CH2CH3+Br2> c)CH3CH=CHCH3+Br3> D) HEXENE+KMnO4> E) HEXENE+Br2>
asked by April 
geometry
Please Help. MNOP~Qrst with a scale factor of 5:4. MP=85mm. What is the value of QT?
asked by myles 
psychology
Motives are internal states that activate behavior and give it direction. True or False
asked by jamal mattis 
Chemistry
2C10H22 + 31O2 = 20Co2 + 22H2O What kind of reaction is this?
asked by Isabella 
Physics
Two canoeists in identical canoes exert the same effort paddling and hence maintain the same speed relative to the water. One paddles directly upstream (and moves upstream), whereas the other paddles directly downstream. With downstream as the positive
asked by Anonymous 
Chemistry
The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 degrees celsius when 6.243g of aspirin (180.1g/mol) are
asked by Hannah 
Math
Assume it costs Microsoft $4,300 to manufacture 7 Xbox 360s and $8,290 to manufacture 14. Obtain the corresponding linear cost function. C(x)= (what formula do I use to get the cost function, because I can't get it) What was the cost to manufacture each
asked by Amie 
pop
4. If your speeding car slams into a haystack and comes to rest, how will the IMPULSE that acts on it compare with slamming into a brick wall and coming to rest? A) The impulse will be more. B) The amount of impulse will be the same either way. C) The
asked by Anonymous 
physics
a 15gram bullet moving at 300m/s pass through z 2 cm thick sheet of foam and emerges with a speed of 90m/s find average force impeded its motion through the plastic.
asked by yonas 
math
change 312 degrees to radian measure in terms of pi
asked by HELP ME 
Chemistry
You have two gasfilled balloons, one containing He and the other H2. The H2 balloon is twice the size of the He balloon (let the He balloon have a volume of 1 L and the H2 balloon. a volume of 2 L). The pressure of gas in the H2 balloon is 1 atm while
asked by Bria 
Chemistry
The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 degrees celsius when 6.243g of aspirin (180.1g/mol) are
asked by Hannah 
MATH
A regular triangular pyramid has an altitude of 9m and a volume of 46.8cu. meters. Find the length of the edges and the lateral area of the pyramid.
asked by kitOy 
Calculas
Find any critical numbers of the function. (Enter your answers as a commaseparated list.) g(t) = t sqrt6 − t , t < 13/3 I don't even know how to start out!
asked by Mary 
finite
Assume that the coin is flipped 10 times. What is the probability that both heads and tails occur?
asked by victoria 
physcis
reviews the concepts that are important in this problem. A golfer imparts a speed of 35.9 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the
asked by KayLyn 
macroeconomics
if retiree benefits were frozen what would happen to total expenditures
asked by Tracey 
physcis
Boat A negotiates a curve whose radius is 375 m. Boat B negotiates a curve whose radius is 150 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A to that of boat B?
asked by KayLyn 
Psychology
According to sociobiologists, it is adaptive for male courtship behavior to: a. desire stability b. idealize security c. be choosy d. be promiscuous My answer is A.
asked by Terry 
Psychology
Modeling others' behaviors has been shown to be significant factors in learning. Research on modeling (and aggression, explicitly) demonstrates that aggression correlates with: a. violence in the media b. male testosterone levels c. social class d.
asked by Terry 
Chemistry
A compound containing only C, H, and O was extracted from the bark of the sassafras tree. The combustion of 36.3mg produced 98.6 of CO2 and 20.2mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas
asked by Tiffany 
College Physics
Answer the following questions for a mass that is hanging on a spring and oscillating up and down with simple harmonic motion. Note: the oscillation is small enough that the spring stays stretched beyond its rest length the entire time. Options for each
asked by Jerry 
pop
If a fastmoving object strikes you, you'll experience less force of impact if you can ____________________. A) increase the time the momentum decreases. B) shorten the time the momentum decreases. C) either shorten or increase the time, for the result is
asked by Anonymous 
Chemistry
How much 12 M HCl do you add to 1 L of water to obtain 0.2 HCl? Use this same approach to do the math for the dilution of 5.5 M of barium hydroxide solution to 0.5 M barium hydroxide solution.
asked by Amanda 
HELP 15
A result from being multiplied A. Product B. Quotient C. Multiplier D. Expression I THINK ITS B R C
asked by kesha 
physics
An unclothed student is in 24 ◦ C room. If the skin temperature of the student is 37 ◦ C, how much heat is lost from his body in 6 min, assuming that the emissivity of the skin is 0.83 and the surface area of the student is 1.5 m2 . The
asked by Ivan 
psychology
What are some movies that is related to the issues of child development and developmental psychology
asked by tim 
physics
a 2kg block of wood rests on a long table top. a 5 gram bullet moving horizontally with speed of 150m/s is shoot into the block and stricks in it then block slides 270cm along the table and stops. find a)speed of block after impact b)friction force between
asked by yonas 
Algebra
Find a linear equation whose graph is the straight line with the given property. HINT [See Example 2.] Through (2, −3) and (1, 1) Which formula do I use? y2y1/x2x1 or yy1=m(xx1)[
asked by Rick 
Geometry
Please help. The scale factor of ^RST to ^DEC is 3:13. What is the scale factor of ^DEC to ^RST?
asked by myles 
calculus
At t=0 , a particle starts at the origin with a velocity of 6 feet per second and moves along the xaxis in such a way that at time t its acceleration is 12t^2 feet per second per second. Through how many feet does the particle move during the first 2
asked by illy 
Math, URGENT!
What is the decimal equivalent of 1,932% and how do you get the answer to the decimal equivalent?
asked by Losa 
College Math
Natasha drove from Bedingsfield to Portsmouth at an average speed of 100 km/h to attend a job interview. On the way back she decided to slow down to enjoy the scenery, so she drove at just 75 km.h, Her trip involved a total of 3.5 hours of driving time.
asked by Toney 
math
1. Find the expense at 60 cents a square foot of polishing the curved surface of a marble column in the shape of the frustum of a right circular cone whose slant height is 12 ft. and the radii of whose bases are 3ft 6in and 2ft 4in respectively.
asked by kitOy 
math
An inverted square pyramid has a height equal to 8m and a top edge to 3m. Initially, it contains water to the depth of 5m. a. What is the initial volume of the water in the tank? b. If the additional water is to be pumped into the tank at the rate of 20
asked by kitOy 
help 1
This number represents the equal number of parts that equal a whole in a fraction. A. Numerator B. Denominator C. Variable D. Expression i got b
asked by kesha 
math
The ratio of the volume to the lateral area of a right circular cone is 2:1. If the altitude is 15cm, what is the ratio of the slant height to the radius?
asked by kitOy 
Chemistry(Please check)
1) The reaction A + B + C = products has a rate law rate = k times A times C squared. Which of the following will result in an increase in the rate constant for the reaction? #1  increasing the temperature #2  adding a catalyst #3  doubling the
asked by Hannah 
math
what is the role of the null hypothesis
asked by Patiance 
Chemistry
1. Nitric oxide reacts with bromine gas at elevated temperatures according to the equation, 2 NO(g) + Br2(g) = 2 NOBr(g) The experimental rate law is rate = k[NO][Br2]. In a certain reaction mixture the rate of formation of NOBr(g) was found to be 4.50 x
asked by Hannah 
Chemistry
What is the % by volume of an alcohol solution prepared from 35 ml alcohol and 350 ml of water?
asked by Nene 
Chemistry(Please help)
The vapor pressure of diethyl ether is 463.57 mm Hg at 25 degrees celsius. How many grams of aspirin C9H8O4, a non volatile nonelectrolyte (mw=180.1g/mol), must be added to 216.7g of ether to reduce the vapor pressure to 453.74 mm Hg. Ether=74.12g/mol so I
asked by Hannah 
Chemistry(Please help)
The common laboratory solvent diethyl ether (ether) is often used to purify substances dissolved in it. The vapor pressure of diethyl ether , CH3CH2OCH2CH3, is 463.57 mm Hg at 25oC. In a laboratory experiment, students synthesized a new compound and found
asked by Hannah 
Psychology
The emotional risk factor that poses a significant danger to one's physical health is proneness to: a. Antagonistic anger b. depression c. loneliness and worry d. anxiety and helplessness I chose B.
asked by Terry 
algebra
Natasha has been saving money to buy a new pair of running shoes. The pair she wants cost $132. She currently has $80. She saw an ad in the paper that the store is having a "1/3 off sale" Does she now have enough money to buy the shoes? if not how much
asked by SOLEE 
PLEASE HELP SUE
The angle is less than 180 degrees, but more than 90 degrees. A. Obtuse angle B. Right Angle C. Acute Angle D. Triangle A
asked by kesha 
PLEASE HELP3
The remaining amount after deductions in salary. A. Gross B. Net C. Fiscal D. Tariff I GOT GROSS
asked by kesha 
eng 22
Which of the following leads to the deepest appreciation of a film? Turning off your brain completely and letting life’s pressures slip away Paying attention to what a film is trying to say Learning the technical names of a film’s elements Learning the
asked by kim 
PLEASE HELP4
A holder in an investment. A. Stakeholder B. Accountant C. Executive D. Assistant A
asked by kesha 
HELP 5
Acceptance, Perception and Conclusion A. Customs B. Beliefs C. Traditions D. Rituals B
asked by kesha 
help please
To assume all are the same and to categorize A. Ethnocentrism B. Prejudice C. Stereotype D. Racism i got b
asked by kesha 
Chem 100 Lab
A black solid is heated in a tube that is completely evacuated of air. Hydrogen is added to the tube. An orange powder is formed and water vapor is seen on the outside of the tube. Is the original solid an element or compound? Can you identify the
asked by Boyet 
HELP11
A line horizontally drawn from the center of the circle. A. Radius B. Axiom C. Circumference D. Vertex A
asked by kesha 
Math
solutions to the problem what fourdigit whole number satisfies the following conditons? The sum of the digits is 6; the number is less than 1200; none of the four digits are equal; and the tens digit is an odd number.
asked by Frances 
HELP 13
Practices by a certain group of people A. Customs B. Beliefs C. Traditions D. Norms C
asked by kesha 
HELP12
A group that has exclusive business rights and titles. A. Company B. Corporation C. Investment D. Proprietorship D
asked by kesha 
Qauntitative Analysis for Mgmt
Your company uses 1,500 per year of a certain subassembly that has an annual holding cost of $45 per unit. Each order placed costs $150. The company operates 300 days per year and has found that an order must be placed with the supplier 6 working days
asked by JeannieC 
Chemistry(Please help)
The vapor pressure of chloroform is 173.11 mm Hg at 25 degrees celsius. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 degrees celsius when 6.243g of aspirin (180.1g/mol) are
asked by Hannah 
Chemistry(Please check)
A reaction has a rate law, rate = k times A times B squared. What is the overall order of the reaction. I think that the order is 0. Is this correct?
asked by Hannah 
Geometry
Please Help. You make a scale draing of a garden plot using the scale 2in.= 17ft. If the length of a row of vegetables on the drawing is 3 in.,how long is he actual row?
asked by myles 
English
Identify the participial phrase in the sentence below. Rising early, I saw the sun come up. A.Rising early B. saw the sun C. come up D. in the distance Thanks for the help :)
asked by Jess 
trig
y= sin x/2, 0 less than equal to x less than equal to 4pi... the question says state the amplitude and period for each equation and graph it over the indicated interval
asked by jim 
algebra
what number is equivalent to this expression,(4 x 9  13)  15 divided by 5 x 2  1??? can someone help me with this.
asked by nick 
math/geometry
An architect is designing a small Aframe cottage for a new resort area. A cross section of the cottage is an isosceles triangle with an area of 98 square feet. The front wall of the cottage must a accommodate a sliding door that is 6 feet wide and 8 feet
asked by TY 
geometry
if JKLM is a rectangle if jl = 4x  12 and MK = x what is the value of x? what is the length of the diagonal?
asked by yasmine 
Chemistry
The vapor pressure of diethyl ether is 463.57 mm Hg at 25 degrees celsius. How many grams of aspirin C9H8O4, a non volatile nonelectrolyte (mw=180.1g/mol), must be added to 216.7g of ether to reduce the vapor pressure to 453.74 mm Hg. Ether=74.12g/mol This
asked by Hannah 
science(chemistry)
complete the following reaction: 1.CH3CH_CH2+H2O 2.CH2CH2+Br2
asked by RAYNOLD 
physics
Boat A negotiates a curve whose radius is 336 m. Boat B negotiates a curve whose radius is 160 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A to that of boat B?
asked by Shelby 
physics
A 2490 kg demolition ball swings at the end of a 35.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 7.26 m/s. Determine the tension in the cable.
asked by Shelby 
world history
who ruled over babylons last era greatness
asked by Anonymous 
argumentitive essay
the authorites in your country are considering the introduction of sunday racing in order to boost the industry room a finical sperspective. write an argumentitive essay to support or oppose this view.
asked by dianne henry 
math
Transform the following. Do not evaluate. log (3*4) log 3^4
asked by Mark 
bio
How does the surface areatovolume ratio of a 1mm cube compare to the surface areato volume ratio of a 3mm cube? 1. The ratio does not change. 2. The ratio increases as the cube becomes larger. 3. Increasing the volume increases the ra tio. 4. The 3
asked by anmol 
calculus
f(x)=e^xx (a) at what xvalues does f have relative extrema? (b) find the exact value of 1 to 1 on an interval f(x)dx. (c) show that f does not have any inflection points.
asked by Cleondra 
math
convert each point,P(x,y)to the ordered pair P(r cos theta ,r sin theta).round all valuas of r to one dicimal place and all values of theta to the nearste degree. (a) (4,6) (b) (3.7) (c) (10,23)
asked by meme 
english grammarrrrrrrrrrrrr help
Hi, I really need help to fix my grammar and to double check my answer Write several paragraphs for someone who has just watched the same movie you did. They didn't know the story before watching the movie, and are wondering what was changed from the
asked by Anonymous 
Math
if f is an exponential function, and f(5)=20 and f(9) = 14, use the addmultiply property to calculate f(13),f(17), and f(21). Show your method
asked by Jake 
math
the volume of an equilateral triangular frustum is 183 square root of 3 cubic inches. The upper base, 9in above the lower base, has an edge which measures 8in. Compute for the edge of the lower base.
asked by kitOy 
physics
A car accelerates at a constant rate from zero to 20.5 m/s in 10 seconds and then slows to 15.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
asked by moon 
help 2
A decrease in purchasing power A. Debt B. Gains C. Depreciation D. Gains i got a
asked by kesha 
English
Hello. I will be very grateful for your help. 1)Which is correct: "he called me a)in an hour, b) after an hour"? 2)Is it possible to use "dismiss" in the context: "Many plants and factories are now dismissing workers"? 3)Is it possible to use "convert" in
asked by Ilma 
chemistry
Calculate the number of molecules of NBr3 in 25.0 g NBr3. Use a molar mass with at least as many significant figures as the data given.
asked by Anonymous 
phoenix
What type of negative experiences, if any, have you had from social media?
asked by antwan 
chem
I think I figured out the answer for the net ionic, I wanted to know if this is right? and What is the superscript for it? Co+ (aq) + 2 OH (aq) = Co(OH)2 (s)
asked by Suey 
phoenix
What type of negative experiences, if any, have you had from social media?
asked by antwan 
MATH
knowledge : point (3,4)is on the terminal arm of an angel (alpha) in stander position.verify that (sin alpha)2 + (cos alpha )2 =1
asked by meme 
bio
How does active transport differ from passive transport? 1. Molecules move down a concentration gradient in active transport. 2. Carrier proteins are used only in active transport. 3. Energy is required only in active trans port. 4. Energy is required
asked by anmol 
Math
Find all real solutions of the equation. (Enter your answers as a commaseparated list. If there is no real solution, enter NO REAL SOLUTION.) 17x3 − x + 3 = x3 + 24x2 + x
asked by Toney 
Finance
and produces 200 units of output, which it sells at $5 per unit. Firm B buys $100 worth of goods from firm A and $150 worth of goods from firm C, and produces 300 units of output, which it sells at $7 per unit. Firm C buys $50 worth of goods from firm A
asked by Anonymous 
Statistics
What is the 10th percentile, n of group of people's pulse rates, where X = pulse rates of group of people, for which the mean is 73 and the standard deviation is 8? Assume a normal distribution. (Round your answer to the nearest whole number.) n = .
asked by Anonymous 
calculus
find lim x>0 3 sqrt x+9/x
asked by sara 
arithmetic
What makes the mode decrease In math?
asked by Daniela 
Physics
A body of mass 5kg falls from a height of 10m above the ground.what is the kinetic energy of the body just before it hits the ground.[g=10ms2
asked by Ridwan 
math Statistics
Hi I need help with Statistics. Can anyone help me to understand it better? I am in fear that if I do not figure this out soon I will fail my class. I am needing help with the chapters 12,and 13. in the book called Statistical Reasoning in the Behavioral
asked by Sara 
Physics
a train is moving at 45km/h when a coupling breaks and the last car separates from the train. as soon as the car separates, the brakes are automatically applied, locking all wheels of the runaway car and causing a uniform decelaration of 5 m/s^2. determine
asked by marco 
English
I'm including the last part of the rephrase. I hope you can read it because I had problems with my previous post. By the way, they and them in my previous post referred to the horses. 1) When Gulliver comes back home in England, his wife and his other
asked by Henry2 
physics
An electron at rest is found to have a force of 0.40 N to the left. What is the electric field (magnitude and direction) at the location of the electron?
asked by Amber 
chemistry
Do NPK fertilizers contain all three elements (nitrogen, phosphorus and potassium) in them or just 1 of the three elements?
asked by Smk 
Calculus (Math 2A)
Gravel is being dumped from a conveyor belt at a rate of 20 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 19
asked by What is wrong with it? 
y no one anwering my ques
How does active transport differ from passive transport? 1. Molecules move down a concentration gradient in active transport. 2. Carrier proteins are used only in active transport. 3. Energy is required only in active transport. 4. Energy is required only
asked by anmol 
physics
A 40.0 kg crate is initially moving with a velocity that has magnitude 4.09 m/s in a direction 37.0 ^\circ west of north. How much work must be done on the crate to change its velocity to 5.49 m/s in a direction 63.0 ^\circ south of east?
asked by Colton 
math
solve the equation,(112  38) x 14 divided by 7 + 142
asked by kiki 
Physics
A truck of mass 7520 kg is traveling along a level road at an initial speed of 32.9 m/s and then slows to a final speed of 17.9 m/s. Find the total work done on the truck.
asked by Tarra 
chemistry
The mass of a single uranium atom is 4.70E22 grams. How many uranium atoms would there be in 339 milligrams of uranium?
asked by pa 
MATH
A gyroscope of radius 18 cm rotates 35 times per minute. What is the linear velocity at a point on the edge of the gyroscope?
asked by me 
chemistry
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse
asked by Sarah 
physcis
After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 35.5 m horizontally from the end of the ramp. His velocity, just before landing, is 18.5 m/s and points in a direction 43.2 ° below the horizontal. Neglecting
asked by KayLyn 
chemistry
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse
asked by Janice 
criminal law
•Should the United States combine all the police agencies into one national police organization? Why or why not? •If you must consolidate the police, would you have to do the same to the criminal justice system? How would you create and establish such
asked by jc 
Math
How do you express 234^789 in scientific notation? Its to big to computer for my graphing calculator Thank You
asked by Sam I Am 
Chemistry
What is the % by volume of an alcohol solution prepared from 35 ml alcohol and 350 ml of water?
asked by Nene 
chemistry hw
SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution
asked by Ariel 
english  Ms. Sue
Ms. Sue I worked on my thesis and and my outline, can you please tell me what you think? I appreciate it so much! I’d like to define the traditional family and compare it to a modern television show and argue that even though the traditional family holds
asked by Farrell 
Chemistry
What is the molar concentration (M= molarity) of a solution prepared by dissolving 50 g of NaCl in 750ml of water?
asked by Nene 
Economics
Grocery stores and gasoline stations in a large city would appear to be examples of competitive markets: There are numerous relatively small sellers, each seller is a price taker, and the products are quite similar. a. How could we argue that these markets
asked by Anonymous 
chemistry
if i have two salts KCl and NaCl can I say that KCl conducts more electricity because it has an cation with lower ionization energy
asked by chemistry1 
physics
A basketball player makes a jump shot. The 0.585 kg ball is released at a height of 2.14 m above the floor with a speed of 7.15 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.19 m/s. What is the work done on the ball by air
asked by Harry 
Algebra 2
Solve each equation below for x. (Use logarithms.) 10^(2x^(2)5x+11) = 10000 9^(2(x1)) = √(27)
asked by Peter 
Math
Judith has a total of 8 fish in her aquarium. Exactly 6 of the fish are guppies. What percent of the fish in the aquarium are guppies.
asked by Leslie 
physcis
A 2520 kg demolition ball swings at the end of a 23.9 m cable on the arc of a vertical circle. At the lowest point of the swing, the ball is moving at a speed of 8.97 m/s. Determine the tension in the cable.
asked by KayLyn 
world history
Which statement applies to BOTH the maurya and the Gupta empires? A.Both empires united diverse peoples within their empires. B.Both empires fought bitterly against Buddhism. C.Both empires had a loose goverment structure that gave power to individual
asked by ciara 
Math
Need help understanding halflife/decay problem for upcoming test. A water filter is constructed to form a foam that removes 25% of the particulate impurities for each inch of foam. 1.What percentage of the particulate impurities will be removed by a
asked by Gregory 
Math
Henrey had a piece of a rope that was 22 1/2 inches long. Henry cut the rope into two pieces so that one piece was 8 1/4 inches long. What was the length of the other piece of rope
asked by Leslie 
Calculus (Math 2A)
Use implicit differentiation to find the slope of the tangent line to the curve y/(x2y) = y^3 +9 (1,10/21) ive done this problem around 10 times and i still cant get it.... when i did it the last time i got 9y^3/ 3y^2 x  8y^3  19 and the slope around
asked by BOB PLEASE HELP 
math
a data set of size 19 has correlation coefficient of r= 0.432. Test the significance of r at the 5% level and at the 1% level
asked by bob 
Economics
Wilpen Company, a price setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U. S. demand for its tennis balls by using the following linear specification: where Q is the number of cans of
asked by Greg 
Social studies
Name the tenants of a democratic society, or describe the belief system of democratic societies
asked by Stephanie 
Grammar
what is the difference between the Direct Object and the Indirect Object?
asked by Losa 
Chemistry
How many particles are in .169 moles of Potassium Sulfide?! What is the percent composition of sulfer in that same prolem?!
asked by Alison 
Physics
When an air capacitor with a capacitance of 380 nF (1 {\rm nF} = 10^{9}\;{\rm F}) is connected to a power supply, the energy stored in the capacitor is 1.95×10−5 J. While the capacitor is kept connected to the power supply, a slab of dielectric is
asked by Robert Soos 
statistics
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent. On the other hand, the firm reports that the yearly returns on
asked by Anonymous 
math
WHAT IS 6 2/3+[3 1/3+7 1/3] = I THOUGHT IT = 16 4/3 IF I AM CORRECT THE ANSWER IS NOT THERE DO SIMPLIFY THE ANSWER WOULD THE ANSWER BE
asked by brianna 
ETH/125
My format has to be according to APA standards Are Cubans Colonized or immigrated to the US? Did Cubans facce prejudice, sergration, racism, or any combination of gthe three? If so how and why. ( I have to include research in my findings for my essay)
asked by Tica 
help please
Acceptance, Perception and Conclusion A. Customs B. Beliefs C. Traditions D. Rituals i got d
asked by kesha 
physics
A man with a mass of 62 kg stands up in a 64kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How
asked by Anonymous 
math/117
Could someone look over this paper before I turn it in? Thanks Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people
asked by Debbie 
Chemistry
What are the various uses of radioactivity in healthcare? What are the future trends in healthcare with respect to the use of radioactivity?
asked by Nikki 
Last Chemistry Question!
How do you Convert from Moles to Liters? Man i hate not understanding test prep material!
asked by Alison 
Chemistry
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse
asked by Ariel 
Calculus
Determine the slope of the tangent to the curve y=2(x^2+x1)^3 at (1, 2)
asked by Jessi 
Statistics Behavior Science
Suppose you were in charge of advertising for an automotive dealership when the gas prices increased to $4 per gallon. Most of your cars are fuelefficient, but you have two models that have extremely poor fuel economy, that is, a low number of miles per
asked by Ariah 
law
Jennifer Wilbanks, the socalled “Runaway Bride” from 2005, disappeared just before her wedding. When she resurfaced, she wove a story of kidnapping and sexual abuse by a Hispanic man. She later admitted to her lies and confessed that she had run away
asked by sharday 
Math
55/3 as fractions
asked by Leslie 
algebra
Tanslate this sentence into an equation. " 48 is 4/9 of Malik's height"
asked by cassie 
math
a sales representative earned four times as much in the fourth week of jan than any other week in jan what is the income for the fourth week
asked by don 
Englisg
I'm finding extremely difficult to rephrase this letter taken from Richardson's Pamela. I really need your help. 1) In letter XV of Richardson’s Pamela, Pamela recounts to her mother what happened to her as she was concluding her previous letter. 2) Mr.
asked by Henry2 
Chemistry(Please help, thank you!)
How would I find the molality of NaCl with the following information? initial temperature= 98degrees celsius final temp=100 degrees celsius. Kbp(water)=0.512
asked by Hannah 
physics
How far from the center of the earth must a person be to experience acceleration due to gravity that is one half the acceleration at the surface?
asked by Anonymous 
CHEM
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse
asked by JSJFJF 
English
Does this sentence make sense: After interviewing my neighbor, who does not want to release her name, so I will call her Ms.Smith,.....
asked by Anonymous 
math
solve 3.7^4*x = 9271
asked by Stewart 
physics
HOw many cubic meter of water will an air tight rectangle box with a mass of 8000 kg and dimensions of 10m long 5m wide 3m tall displace when dropped in water? will it float?
asked by Anonymous 
Math
if h(t) = 17.4 * 1.23^t, find t when z(t) = 144
asked by Trevor 
statistics
Suppose that the weights of airline passenger bags are normally distributed with a mean of 48.08 pounds and a standard deviation of 3.13 pounds. A)Let X represent the weight of a randomly selected bag. For what value of c is P(E(X)  c < X < E(X) +
asked by Joe 
calculus
integral from 0 to pi of 9+6cos((pi/25)y)+cos^2((pi/25)y)
asked by Noor 
Math
A race car starts from rest on a circular track of radius 565 m. The car's speed increases at the constant rate of 0.520 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. (a) the speed of
asked by Anonymous 
Math
A car travels due east with a speed of 42.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain
asked by Anonymous 
writing
I'm Writing a Discursive Essay on the topic "is it more difficult to be a young person today then it was 50years ago", I have these main points: "we have technology but its brought us media pressue" "Better education system but with more pressue to succed"
asked by khabo 
algebra
Snowfall Suppose 5 inches of snow fall before noon and 2 inches per hour fall thereafter until 10 P.M. (a) Write a formula that calculates the snowfall S in inches, x hours past noon. (b) Use your formula to calculate the total snowfall at 8 P.M. (c) How
asked by Toni 
science
i need this answered for me haha^^ i have no clue.. ''a solute was mixed with a solvent, some of the solute fell to the bottom of the test tube, what happend?'' plzzzz answerrr xD
asked by Mariah 
physics
A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg, and a radius of L/2
asked by janny 
chemistry
I^ H5IO6 BrO2 HClO I2 Which could not disproportionate?
asked by Lucas 
HELP 7
Converting Terminology via computers. A. Cryptography B. Technology C. Geometry D. Geology B
asked by kesha 
Calculus
Which of the following is a point at which the tangent to y=(x2)^2(x+3) is horizontal? a) (2,16) b) (1, 18) c) (1,4) d) (2,0) I found the derivative of y=(x2)^2(x+3) which is 3x^22x8 if I solved for 0, it wouldn't give me the answer that are listed
asked by Jessi 
help 8
The ability for a business to pay all that is owed. A. Technology B. Strategies C. Obsolesce D. Solvency D
asked by kesha 
PLEASE HELP 8
Basing the Results on Probability A. Calculation B. Abstraction C. Classification D. Relation C
asked by kesha 
Calc
At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 15 knots and ship B is sailing north at 18 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per
asked by Heather 
Chemistry 100 Lab
What will be the color of copper II oxide when heated in the presence of hydrogen?
asked by Boyet 
Math
Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars) for a run of x pairs of cleats is C(x) = 3000 + 9x + 0.1x2 (0 ≤ x ≤ 500). Gymnast Clothing sells the cleats at $130 per
asked by Mandie 
Geometry
1.) what is the length of the line segment whose endpoints are (1,1) and (3,3)? 2.) what are the coordinates of the midpoint of the line segment whose endpoints are (c,0) and (0,d)? 3.) The diagonals of a rhombus have lengths of 8 cm and 6 cm. The
asked by Taylor 
HELP 9
The shares of a company A. Stocks B. Bonds C. Executive D. Assistant I GOT A
asked by kesha 
math
An edge of a cube is increased by 10%. Find the percent by which the surface area o fa cube has increased?
asked by Swati 
HELP 10
Public policy and Politics A. Government B. Public C. Nation D. Special Interests A
asked by kesha 
PHI103
1. A radical skeptic might be willing to doubt which of the following? (Points : 1) 3 + 5 = 8 Grass is green. Cheese is fattening. All of the above
asked by Tara 
Writing
I'm Writing a Discursive Essay on the topic "is it more difficult to be a young person today then it was 50years ago", I have these main points: "we have technology but its brought us media pressue" "Better education system but with more pressue to succed"
asked by Nina 
ENG103
Hello you guys did such a great job helping me with my essays in ENG100 but it has been so long, I am now in ENG103 and I need help with an argument definitional essay. I typed my intro, it needs work, I just need help with my thesis/argument. General
asked by Farrell 
mathematics
Write all of the following statement(s) that apply to the following polynomial: 5x3 + 2x2 – 7 It is a binomial. It cannot be evaluated at x = It has a degree of 3. It is cubic.
asked by latoya 
principles of pysics
A cannon with a long barrel fires a shell faster because the shell experiences a greater ____________________. A) change in inertia. B) impulse. C) acceleration. D) None of these.
asked by Anonymous 
HELP 12
The money being made in a company. A. Obsolesce B. Solvency C. Revenue D. Debt C
asked by kesha 
pop
A fastmoving massive car has a headon collision with a slowmoving light car. Upon which is the impulse greater? A) The massive car. B) The light car. C) Impulse is the same on both. D) More information is needed to correctly answer this.
asked by Anonymous 
pop
If superman in space throws a boulder with 10 times as much mass as himself, and the boulder leaves his hands at 100 m/s, how fast does superman recoil? A) 1000 m/s. B) The same speed, 100 m/s. C) 10 m/s. D) None of these are correct.
asked by Anonymous 
pop
Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at ____________________. A) 0.5 m/s. B) 1 m/s. C) 1.5 m/s D) 2 m/s E) 2.5 m/s.
asked by Anonymous 
algebra
Find the distance between the two points (6.5, 1.0) and (8.6, 5.2). Give your answer rounded to two decimal places
asked by lorrayne 
POP
2. A truck moves with a certain momentum. If both its speed and its mass are doubled, how much greater is its momentum? A) Two times. B) Four times. C) Eight times. D) Unchanged, the same.
asked by Anonymous 
POP
Which has more momentum, a speeding baseball or an ocean liner at rest in a harbor? A) Baseball. B) Ocean liner. C) Both the same. D) Can't say without more information.
asked by Anonymous 
Chemistry
How many moles are in 12.0 grams of Potassium Sulfide?
asked by Alison 
Science
The cirucumference of a ballon is 75 inches and the diameter is 12 inches what is the volume? Science  Ms. Sue, Saturday, February 18, 2012 at 9:54pm Thank you. volume = 4/3 ð r3 V = (4/3) * 3.14 * 6^3 V = (4/3) * 3.14 * 216 V = (4/3) * 678.24 V = ? I am
asked by Joseph 
HELP 14
Money owed A. Assets B. Audit C. Liabilities D. Capital C
asked by kesha 
Chemistry
How much 12 M HCl do you add to 1 L of water to obtain 0.2 HCl? Use this same approach to do the math for the dilution of 5.5 M of barium hydroxide solution to 0.5 M barium hydroxide solution.
asked by Amanda 
precal
Find the solution of the exponential equation, correct to four decimal places. 4^(2x − 1) = 6
asked by melek 
cal 2
find the derivative ln [x^3 +((x+3)^3)((x^2)+4)^7
asked by carlton 
world history
i'm working on my senior project and i need some help i'm supposed to do some researches about my future career, however i couldn't find a website that tells me if a world history teacher needs an additional training or not ?
asked by sara 
physics

algebra
The solution to this i believe is no solution need help. 2x+2>2x3
asked by Richard 
PH103
Truth tables can a. display all the possible truth value involved with a set of sentences. b.determine what scientific claims are true. c.determine if inductive arguments are strong. d.determine if inductive arguments are weak.
asked by Mary 
chem hw
Assuming equal concentrations, rank these aqueous solutions by their freezing point: Li2SO4, Li3PO4, SnCl4, NH4Br. (from highest freezing point to lowest freezing poinT) Is the order Li3PO4, Li2SO4, SnCl4, and NH4Br???????? If not what is the correct
asked by Amy 
history
Help needed! I'm comparing France and the USA. If France had the Paris vs. Versaille conflict with regards to the city capital. As much as capitals showed the unity amongst the people, it also produced conflicts between different sectors of society. What
asked by annie 
arithmetic
6(x6)+2=8(x+2)8
asked by Anonymous 
chemistryyyy
A solution is made by dissolving 0.0100 mol of HF in enough water to make 1.00 L of solution. At 23 °C, the osmotic pressure of the solution is 0.308 atm. What is the percent ionization of this acid? Please help.
asked by Jake 
Physics
A uniform meter rule of mass 100g balance at a 40cm mark when a mass x is placed at the 10cm mark.What is x?
asked by Anonymous 
Algebra
Assume it costs Microsoft $4,300 to manufacture 7 Xbox 360s and $8,290 to manufacture 14. Obtain the corresponding linear cost function. C(x)= (what formula do I use to get the cost function, because I can't get it) What was the cost to manufacture each
asked by Max 
science
on what website can i find info on things made of the element hafnium:a picture,how it's made, and why it is made with hafnium.
asked by dylan 
Quantitative Analysis for Mgmt
Computer sales over the past 4 months have been 35, 34, 38, and 44 units. „L Using a 3month moving average, forecast sales for the next month. (35+34+38)/3 = 35.67 (34+ 38+44)3 = 38.67 „L Using a 3month weighted moving average with the weights 3, 2,
asked by JeannieC 
math
1.) Find the solution set of 2sin squared θ1= 0 if 180 degrees is less than or equal to θ is less than or equal to 360 degrees 2.) prove: 2cotθ/cot squared θ 1 = sin2 θ sec2 θ
asked by jhay 
HELP 16
Equal Rights A. Equality B. Minority Rights C. Standards D. Sovereignty B
asked by kesha 
physics
Two trains are heading toward each other on the same track with velocities v1 and v2 respectively. The drivers,noticing this when the trains are at distance x apart, apply brakes, giving same acceleration y to each train. The necessary condition for
asked by Makinin 
Physics
During a certain thermodynamic process a sample of gas expands and cools, reducing its internal energy by 3690 J, while no heat is added or taken away. How much work is done during this process?
asked by Ivan 
English
There were problems with my last post last night. I was ill and I didn't manage to include they things on Gulliver's travels I wanted you to check. Here is the first part of the rephrase. I've tried to rephrase the beginning of Chapter 11. 1)At the
asked by Henry2 
pre calc
A rock is dropped form the top of a cliff. It takes 12 seconds to hit the ground. What is the height in feet of the cliff?? How fast is the rock moving when it hits the ground?
asked by jim 
cjs
The current threat of terrorism has made many legislatures in Congress think about the United States combining all the police agencies into one national police organization. The centralization of power would stop the discombobulated nature of the 3
asked by jade 
Please help!! Math
Solve the following problem using a method of your choice. A store clerk who is taking inventory in a toy store of bicycles and tricycles in a certain way. He commented that there are 50 wheels and 40 pedals. How many bicycles and how many tricycles did he
asked by Brittany M. 
math
if z(t) = 60 * 1.03^t, find t when z(t) =144
asked by Samuel 
engineering
Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is
asked by ali 
chemistry
If hydrated sodium carbonate contains 6.0 g of carbon, find its mass.
asked by krystal 
5
The remaining amount after deductions in salary. A. Gross B. Net C. Fiscal D. Tariff
asked by kesha 
English
Here is the second part of my rephrase. Hopefully I can send it to you, Writeacher! Thank you. 1) Then he likens both his family and friends to the horses for their shape and disposition (?). Though more civilized and endowed with the gift of speech, they
asked by Henry2 
7
Acceptance, Perception and Conclusion A. Customs B. Beliefs C. Traditions D. Rituals i got b
asked by kesha 
chemistry
Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is
asked by ali 
Information literacy
Which of the following related subjects is listed as a broader term
asked by Anonymous 
Chemistry
I had to perform an experiment for the freezing point depression in which we had to determine the freezing points of water as a pure solvent, sodium chloride, sucrose, and ethylene glycol. We had to work with a partner so I completed the experiment for
asked by Hannah 
English
Hello. I will really appreciate your help. 1) Is it possible to use "unknown" in the following context: "It is still unknown what effect the accident will have on the world."? 2)Is it possible to use "include" in the sentence: "The organization includes 62
asked by Ilma 
physics 213
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 44.7 km/s and 56.2 km/s. The slower planet's orbital period is 8.61 years. (a) What is the mass of the
asked by Erin 
Accounting
Give an example where product and period costs are the same and a separate example where they are different.
asked by Mimi 
English
Thank you very much for helping me, Writeacher! I have a question. As in chapter 11 chapter refers to his last year (fifth year in England) shall I use the past in the rephrase, when he recalls the time he spent with the horses? Here is the third part of
asked by Henry2 
physics
A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg, and a radius of L/2
asked by janny 
precal
Find the solution of the exponential equation, correct to four decimal places. 4^(2x − 1) = 6
asked by melek 
physics
A vertical spring with a spring constant of 1.89 N/m has a 0.307kg mass attached to it, and the mass moves in a medium with a damping constant of 0.0221 kg/s. The mass is released from rest at a position 4.81 cm from the equilibrium position. How long
asked by janny 
Chemistry
A compound containing only C, H, and O was extracted from the bark of the sassafras tree. The combustion of 36.3mg produced 98.6 of CO2 and 20.2mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas
asked by Tiffany 
Physics
What is the truth value of the sentence "Pv~P" A. True B. False C. Cannot be determined D. Not a sentence
asked by Mary 
math
Suppose that $200 was deposited on 1st Jan 2000 into an account that earned 5% interest compounded semiannually. Suppose further that $200 was deposited on 1st Jan 2001 into a different account that earned 6% interest compounded semiannually. In what month
asked by Seth 
Math
I am trying to figure out how to find the answer for r in a fraction. I have about 20 problesms and just need help getting started. The first problem is r/4+2=5.5
asked by Corbin 
physics
a hydraulic jack is used to move an 8896 newton car. if the area of the output piston is 8 times that of the input piston, how much input force is required to lift the car. i did Pi * 8 them multiplied that answer * 8896 then divided that answer times
asked by angela 
College Math
Only 43% ofthe carbon14 in an artifact remains. How old is the artifact? Would the answer be less than the half life?
asked by Angel 
science
The "proof" of an alcoholic beverage is twice the volume percent of ethyl alcohol, C2H5OH in water. The density of ethyl alcohol is 0.789g/ml and that of water is 1.00g/ml. A bottle of 100 proof rum is left outside on a cold winter day. a.) Will the rum
asked by Anonymous 
algebra
Need help solving for x: 500,000/x = 30%/70%
asked by Guy 
English
This paragraph serves as an introduction to the rephrase. I summarized briefly what happened before their conversation. I will include the rephrase in my next post. Thank you. 1) In letter XV of Richardson’s Pamela, Pamela recounts to her mother what
asked by Henry2 
Algebra
Factor 12x^2(x1)4x(x1)5(x1) and show work.
asked by Diana 
Chemistry
I'm abit confusd hw to find the% of H2O of crystallization Na2SO4.10H20
asked by Luc 
maths
prove that 2 2 2 2 (n1) + n + (n+1) = 3n +2
asked by 4611star 
Careers
What Grade 12 courses would I need to take in order to be an accountant? Are there any other requirements?
asked by Rebecca 
physics
A 67.7 kg person jumps from rest off a 3.11 mhigh tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.04 m under the surface of the water. Determine the magnitude of the average force that the water exerts on
asked by Harry 
help asap
Basing the Results on Probability A. Calculation B. Abstraction C. Classification D. Relation a
asked by kesha 
physics
a hot air balloon is hovering at an altitude of 6000 meters. The pilot decides that it is time to descend and turns off the balloon's burners.Once the balloon reaches the ground, the gas inside the balloon occupies 980 m cubed and is at atmospheric
asked by angela 
principles of physics
Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at ____________________. A) 0.5 m/s. B) 1 m/s. C) 1.5 m/s D) 2 m/s E) 2.5 m/s.
asked by britches 
maths
prove that (n1) squared + n + (n+1)squared = 3n +2
asked by 4611star 
principles of physics
7. If superman in space throws a boulder with 10 times as much mass as himself, and the boulder leaves his hands at 100 m/s, how fast does superman recoil? A) 1000 m/s. B) The same speed, 100 m/s. C) 10 m/s. D) None of these are correct.
asked by britches 
Physics
A man uses 170N of force to lift a box with a mass 4.9 kg over his head at a constant velocity. If he is 1.9m tall then what is the net work done on the box?
asked by Net Work 
principles of physics
6. A cannon with a long barrel fires a shell faster because the shell experiences a greater ____________________. A) change in inertia. B) impulse. C) acceleration. D) None of these.
asked by britches 
Math
r/3+7r/5=3 Please help me solve this and show your work
asked by Haylie 
principles of physics
A fastmoving massive car has a headon collision with a slowmoving light car. Upon which is the impulse greater? A) The massive car. B) The light car. C) Impulse is the same on both. D) More information is needed to correctly answer this.
asked by britches 
Physics
How much power does a water pump exert lifting 30 kg of water at a constant velocity 20 m each second
asked by Bret 
math
The number of dogs and chickens on a farm add up to 14. The number of legs between them is 36. How many dogs and how many chickens are on the farm if there are at least twice as many chickens as dogs
asked by Anonymous 
history
Can anyone explain to me how Max Weber’s thoughts on the dynamics between religion, economics, and culture can be related to Protestantism and urbanization in Western Europe? I know that according to Max Weberreligion, economics, and culture are
asked by jamie 
principles of physics
A truck moves with a certain momentum. If both its speed and its mass are doubled, how much greater is its momentum? A) Two times. B) Four times. C) Eight times. D) Unchanged, the same.
asked by britches 
Math
Can you help me set up this problem please P(t) = 100/1+48.2e^0.52t If the company's claim is true, how many months will it take to have mastered 80% of the program. I just need help setting it up Thanks!
asked by Wally 
English
for slideshow presentation i want to add another theme caption for story. i not really know how to say it though like follow your heart to positive direction. like i want to take something positive from orpheus story and teach lesson to jake.
asked by Mohammad 
Math
A rectangular parcel of land is 70 ft longer than it is wide. Each diagonal between opposite corners is 130 ft. What are the dimensions of the parcel?
asked by Toney 
HalfLife
Uranium238 decays to Lead206. The half life of Uranium238 is 4.5 billion years. If you have a 100 g sample. How much sample will you have after 2 half lifes?
asked by Noah 
math
determine the angular velocity if 11.3 revolutions are completed in 3.9 seconds
asked by Ben 
physics
A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period?, What is the power of the elevator motor during an
asked by Joe 
English
Here is the rephrase I hope you can check. Thank you very much in advance. 1) Mr. B refers briefly to the incident in the summer house. He excuses himself by saying that on that occasion he didn’t want to do her any harm but be a little kind to her. 2)
asked by Henry2 
Physics
You push a 2.5 kg block against a horizontal spring, compressing the spring by 16 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the
asked by Chris 
algebra
what number is the simplified expression equal to, 13  7 + (2 x 5  1) divided by 3 + 7. can someone help me with this???
asked by nick 
physics
What is the mass of a person who weighs 750N?
asked by Jade 
Chemistry please help
State Dalton’s Postulates? In light of modern knowledge, what are the inaccuracies in Dalton’s Postulates? I know Dalton's postulates: All matter consists of tiny, indivisible particles called atoms that cannot be created or destroyed Atoms of one
asked by Lena 
parallell and perpendicular lines
please check my homework given P(7,2) and the line y + 3x=7 find the equation for the line parallel line: y+3x+7 y=3(x7) +7 y2=3x+21+7 y=3x+28+2 y=3x+30 perpendicular line: y2=1/3(x7) +7 y2=1/3x7/3 +21/3 y2==1/3x + 14 y=1/3x + 14 +2 y=1/3x +16
asked by luckybee 
Math
if g(x) varies exponentially with x, and g(0) =37 and g(7) =5940 find the particular equation...
asked by Billy 
Physics
A vibration platform oscillates up and down with an amplitude of 10.2 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts
asked by Phil 
writing
I want to know what is wrong in the following sentence: After six months on the job, he faced problems in his first recruitment effort; however, if he solves these problems, the new hires should be able to start working by July.
asked by Ricky 
Economics
what are some economic problems with welfare?
asked by Anonymous 
english
Hmm I'm just wondering why no one is helping me and skipping my question yesterday, is it because it's too long or too advanced? I just needed help with my thesis/argument so I can start my essay. I wrote my intro already but it needs a bit of work. You
asked by Farrell 
History
(So, I have to agree or disagree with regards to the statement provided.. please comment on how I can make my answer better) Confirming Max Weber’s thoughts on the dynamics between religion, economics, and cultureProtestantism and urbanization had a
asked by jamie 
math
what is the simplified portion of the grouping??? 5 + 4 (100  8 x 3)x 4.
asked by mishka 
Physics
A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center.
asked by Angelina 
Calc...
Find the derivative of 7^(2x^2)
asked by Nurcan 
math
determine the linear velocity of a point rotating at 15 revolutions per minute at a distance of 3.04 meters from the center of a rotating object
asked by anon 
World History
Which statement BEST explains why Hunduism is one of the world's most complex repligions? A.Hinduism is very similar to Buddhism and Christianity. B.Hinduism is no longer practiced in presentsday India. C.Hinduism grew out of the overlapping beliefs of
asked by ciara 
Chemistry(Please check)
The units of a rate constant for zero, first, and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? 1) 1/min^3 2) mol^2/L^2min 3) L/molmin^2 4) L^2/mol^2min
asked by Hannah 
physics
A car (m = 1540 kg) is parked on a road that rises 18.9 ° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
asked by Shelby 
Physics
A jet flying at 120 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 2.19 × 105 kg. Calculate the magnitude of the necessary lifting force. L =____ N
asked by Shelby 
physics
A ball is thrown upward at a speed v0 at an angle of 52.0˚ above the horizontal. It reaches a maximum height of 7.3 m. How high would this ball go if it were thrown straight upward at speed v0?
asked by Shelby 
Algebra
Gymnast Clothing manufactures expensive soccer cleats for sale to college bookstores in runs of up to 500. Its cost (in dollars) for a run of x pairs of cleats is C(x) = 3000 + 9x + 0.1x2 (0 ≤ x ≤ 500). Gymnast Clothing sells the cleats at $130 per
asked by Eric