Questions Asked on
May 11, 2014

chemistry
Answer the following math questions focusing on significant figures a. 45.3L x 10 mol/L = b. 67.894 g ÷ 2.56 L = c. 45.3m + 12.344m + 1000m – 1.34m = d. 35cm + 8.3m + 75.341 km + 80,000 mm = e. (43.7m + 39.3cm) ÷ 25.332 m/s =
asked by aira 
Physics
Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet?
asked by T 
Physics
Sam, whose mass is 76kg , takes off across level snow on his jetpowered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15s . How far has Sam traveled when he
asked by TP 
chemistry
Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc0201.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more
asked by julie 
(28) Chemistry  Science (Dr. Bob222)
Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal gas expands against a
asked by Ana 
Physics
A horizontal rope is tied to a 45.0kg box on frictionless ice. What is the tension in the rope if: A) The box is at rest? B) The box moves at a steady vx = 4.40m/s ? C) The box vx = 4.40m/s and ax = 4.60m/s2 ?
asked by TlP 
Economics (36)
For borrowers with good credit scores, the mean debt for revolving and installment accounts is $15,015 (BusinessWeek, March 20, 2006). Assume the standard deviation is $3,730 and that debt amounts are normally distributed. a. What is the probability that
asked by Mia 
chemistry, first year university
Solid NH4N3 decomposes explosively according to the following equation: NH4N3(s) ⇌ 2N2(g) + 2H2(g) A small amount of ammonium azide was placed in a sealed container and the air was removed. The sample was then detonated. At equilibrium the total pressure
asked by julie 
Physics
In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wall. A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of static friction between the ladder and the floor is 0.50. What is the
asked by Kate 
math
A) which is the better value a 12 ounce jar of honey for $2.25 or an 18 ounce jar of honey for $3.24? B) the supermarket displays the unit price for the 12 ounce jar in terms of cost per ounce, but displays the unit price for the 18 ounce jar in terms of
asked by Kayla 
English
Give an example of imagery from act 5 in Romeo and Juliet
asked by Lloyd 
MATH
A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?
asked by Leah 
history 11th grade
Amazon rain forest
asked by anonymous 
physics
24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.
asked by Jatindra Deori 
Chemistry
How can I determine the overall electrochemical reaction that proceeds spontaneously? Cd2+  Cd, Co2+  Co 1. Cd+Co2+ −¨Cd2++Co 2. Co+Cd2+ −¨Co2++Cd (1. and 2. are answer choices)
asked by Sara 
math
A architect is designing a house. The scale on the plan is 1 inch=6 feet. If the house is to have a length of 90 feet and a width of 30 feet, how long will the line representing the house's length on the blue print
asked by Kayla 
Astronomy
Imagine that you are an astronomer, and you are planning to do a survey to find new browndwarf stars. You need to calculate how sensitive your search needs to be (and hence how big a telescope you will need and how long the survey will take). You want to
asked by qwerty 
Physics
design a pair of ear defenders and explain how they work using big idea of energy transfer
asked by Jean Smith 
chemistry
Write equations for the ionisation in water of : A) hydrobromic acid B) nitrous acid C) carbonic acid D) sulfuric acid
asked by Haiano 
english
Im trying to learn this sensory imagery thing. Please check i think its B. Which sentence below best demonstrates sensory imagery? A.There were cameras flashing everywhere and the exicited voices of the helpers probably scared him even more. B.we drove
asked by matt 
Art
What is value? • the lightness or darkness of a color • the intensity of a color • the number of colors being used in a 2D artwork • the difference between two colors
asked by Sandra 
Math
Solve for 5 X 3 to the nth,. my answer is 15, 45, 135, 405
asked by steve 
Social Studies
Did the Marbury v. Madison case affect the power of the judicial branch by helping establish the Supreme Courts' power to check the power of the other branches of the government?
asked by Peeps 
Math
The function rule C= 10 n + 26 where n = number of people and c = cost of party. Show a table if 27,39 , & 43 people go. My answer is the following n 27 39 43 c 296 416 456
asked by steve 
Astronomy
Imagine that you have found an object out in space. When you use the inverse square law to compute its luminosity, you get a ridiculously large value. You therefore suspect that relativistic beaming is at work  the radiation is coming from a jet traveling
asked by qwerty 
math
If Tom buys a red skateboard, then Anne buys pink inline skates." Which statement below is logically equivalent?
asked by Jenny 
algebra
θhe height h in feet of a car above the exit ramp of an amusement park′s freefall ride can be modled by the equation h=−16t 6+s where t is the time in seconds after the car drops s is the starting height of the car in feet. How high above the car′s
asked by Sue May 
Economics (42)
Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings
asked by Mia 
Math
A spinner numbered 110 is spun. what is the probability of spinning a multiple of 3 and a multiple of 2?
asked by Ben 
Math
A Canadian zoo started with 16 whooping cranes and planned to hatch 20 chicks a year. A few birds were kept for breeding and the rest released into the wild. At the end of last year, a total of 136 cranes had spent some time in the zoo. If the pattern
asked by Han 
Chemistry help
I am not to sure how to approach the problem... Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic: N2H4(liquid) + O2(g) ==> N2(g) + 2H2O(liquid) ΔH(reaction) = 615 kJ mol1 What is the enthalpy of this reaction
asked by Anonymous 
Math
A spherical balloon with a surface area of 36pi square inches is inflated further until its diameter has increased by 50%. The surface area of the balloon is now? I know the formula for surface area is A=4pi*r squared. I don't understand how you can figure
asked by Gayle 
physics
A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2 . Through the rest of that distance, its acceleration is – 0.750
asked by Anonymous 
Physics
A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12g ball moves at 6.0 m/s. How great is the change in momentum of the z36g ball?
asked by Ali 
Aths
Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to
asked by Ali 
algebra
The first angle of a triangle is 23° more than the 2nd angle. The 3rd angle of a triangle is 6 times the 2nd angle. Use X to represent the unknown value
asked by brian 
Chemistry
Given the Na+/Na and K+/K halfcells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V Can you please explain the steps?
asked by Sara 
Chemistry
if you produce 5.7 of H2O, how many liters of O2 will be required?
asked by sarah 
english
English is the language of opportunity.why bother to teach indegenous languages
asked by Anonymous 
ALGEBRA
the atmosphere pressure P in pounds per square inch (psi) is given by P=14.7e upper o.21a where a is the attitude above sea level in miles. If a city has an atmosphere pressure y 13.29 psi what is its altitude. Recall that one mile = 5,280 feet. Round to
asked by gary 
ALGEBRA
t =  6.25 In ( 1 N over 80) according to the formula what is the maximum number of word per minute. Round off to the nearest whole number. Solve N
asked by gary 
math
I have to find the area of a kite. I am only given part of the longest diagonal (12 cm) and half of the other diagonal (9 cm). I know the formula is diagonal 1 times diagonal 2 times 1/2. I have the length for one diagonal which is 18 cm b/c 9+9. How can
asked by maya 
algebra
An artifact was found and tested for its carbon14 content. If 75% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) thank you
asked by gary 
algebra
Write the equations in logarithmic form. 25=(1/5)^2 thanks for the help.
asked by gary 
reading
original concept of the american dream
asked by yasminb 
personal finance
Bryan earns $6.25 per hour plus 1.75% commission on all goods sold. One week he worked 37 hours and sold $6,500 worth of goods. What were his weekly earnings?
asked by kevin 
Physics HELP!!!!!!!!
Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?
asked by suzan 
grammar
Have you seen my sister Karla around here today? Have you seen my sister, Karla around here today? Have you seen my sister, Karla, around here today?
asked by Anonymous 
chemistry
how many significant figures do the following numbers have? a. 1.2056 x 10^4 m: b. 1 x 10^89 km: c. 12,000 L: d. 0.000345 cm: e. 1.00036 mL: f. 0.2056000 m:
asked by aira 
Math
Simplify 4sqrt6/sqrt30 by rationalizing the denominator
asked by Math 
math
Aplane is flying at an altitude of 12000m from the pilot the angle of depression tothe airport toweris32 degrees how far is the tower from a point directly beneath the plane
asked by romain 
Chemistry Who step by step
A 0.8870g sample of a mixture of nacl and nan03 is dissolved in water, and the solution is then treated with an excess of AGN03 to yield 1.913g of agcl. Calculate the percent by mass of the nacl in the mixture. 1.913g / 143 = 0.0133 x/58 ( 0.8870g x) y/85
asked by Ken 
Math
Is the following sequence a arithmetic,geometric or neither? 1.6, .8, .4, .2 my answer is geometric
asked by steve 
Math
An artist is designing the rectangular wire structure with four rectangles drawn inside. The artist has a 12 meter length of wire. If the entire area of the figure is to be maximized, what should be the length of X? I know the formula for area of a
asked by Gayle 
Social Studies
Why was the united states interested in claiming the Oregon Country? Is it because they just wanted to expand their land even more?
asked by Lux 
algebra
The learning curves describes the rate at which a person learns certain tasks. If person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by a) according to this formula what is the maximum number
asked by gary 
History
What are the regional interests for Newfoundland, Prince Edward Island, Nova Scotia, New Brunswick.
asked by Annadona 
math
simplify: a)9x+91 b)10n4n c)8v+6(10+6v) d)7(9k+8)+3(k10) a)x=? b)n=? c)v=? d)k=? (please help)
asked by carlos 
Math
Using the table below is it a linear function? x 2, 1, 0, 1, 2 y 7, 1, 8, 17, 25 my answer is that it is a linear function rule: x = 1 y = 8,9,7, 8 I think the rule is y= 8 X+8
asked by steve 
Math
If you have the following points for X and Y what is the linear function rule? x = 4, 1 y = 2, 4 I think it is 1/2 x but I'm not sure if it is +6 or  6
asked by steve 
Chemistry 104
The pH of 0.3 HSO3 is: (How can this problem be solved?) The final answer is 4.41 However, I keep getting 3.76
asked by Radha 
math
Can u please make an equation for this? : the club members need 686 cm of denim for rag dolls. They need 438 cm of denim for bean bags. How much denim is needed in all?
asked by lexi 
Algebra
You are one of the ﬁnalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.
asked by Anonymous 
math
67=(36x)/4.13 (note:its a fraction) (please help)
asked by carlos 
Math!!!
Equation for  the crafts club made 102 wooden train cars. There are 6 cars to a set. How many sets were made?
asked by Dianne G. 
Math!!!
Jim bought 1520 g of beans. He used all the beans to make 16 bean bags. How many hrams of beans did he use for each bean bag?  equation format please!
asked by Dianne G. 
Math
Is y= 3 x squared +x a quadratic function?
asked by steve 
Math
Write a function rule for the following table. x 2 4 6 y 1 0 1
asked by steve 
chemistry
Radioactive decay is a process that follows firstorder kinetics. The halflife of 32P is 0.03920 years; how long (in minutes) would it take for the amount of 32P to decrease to 53.25% of its initial amount? I don't understand at all what to do here
asked by sara 
math
Trail mix is sold in 1pound bags. Mary will buy some trail mix and repackage it so that each of the 15 members of her hiking club gets one 25_ pound bag. How many 1pound bags of trail mix should Mary buy to have enough trail mix without leftovers?
asked by Randy 
life science
Why do human don't contain Chlorophyll to make photosynthesis and They get Energy but they don't contain chloroplast like a Pallisade Mesophyll ??
asked by vuyo ketelo 
Statistics
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number
asked by Angelica 
chemistry
Why is it recommended to carry out iodometric titration as quickly as positive and to get the first end point?
asked by samanmali 
Astronomy
Imagine that you are a particle physicist, and you have come up with a theory that some gammaray bursts come from the decay of a new and exotic subatomic particle that you think might exist. You calculated that if this particle really does exist and
asked by qwerty 
math
0.0357 x # = 357 x 2,# = 1. 200 2. 200,000 3. 2,000 4. 20,000 5. 7,140
asked by peter 
math
What is the value of the expression a / uv if a, u, and v are each doubled 1. multiplied by 2 2. multiplied by 3. divided by 2 4. divided by 4 5. left unchanged
asked by peter 
Algebra
Find the first and third quartiles of the data set. 1, 5, 1, 2.5, 3, 2, 3.5, 2, 3, 1.5, 4, 2, 4, 1, 3, 4.5
asked by Anonymous 
History: World War 1
Hi beautiful people. I am struggling to find a primary source to back up the oft cited claim that Germany was not allowed into the League of Nations. Given that the covenant itself contains no such proscriptions and I am not finding it in the Treaty of
asked by Mizza 
Lifo Orientation
Critically discuss six ways in which Xenophobia impacts on individuals, groups as well as on your community?
asked by Asingisile 
social studies
The mock wars which were held in Louisiana were directed by ______ and ______
asked by kelsey 
Economic/ Accounting
what are welfare payments or consumer subsidies
asked by Anonymous 
history 11th grade
perils of the amazon rain forest
asked by anonymous 
math
5x5+5x5+55x5=750 How are people getting 30?
asked by bob the builder 
PHI 103
This is not the best of all possible worlds, because the best of all possible worlds would not contain suffering, and this world contains much suffering
asked by Mike 
Compensation Management
which of the following statements is best descriptive of why many suggestion plans have failed
asked by Rosa 
Algebra
A bag contains 7 blue, 5 purple, 12 red and 6 orange marbles. Find the probability, if you draw one marble at random from the bag. Select the simplest form. P(not blue)
asked by Prima 
Algebra
You are one of the ﬁnalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.
asked by Anonymous 
Math
Solve the following 2a(a squared+4a)
asked by steve 
English
1. They made coins from gold and silver. 2. They made coins of gold and silver. 3. They made coins out of gold and silver. (Which ones are grammatical?)
asked by rfvv 
8th U.S History DBQ  Pls check my answer!!!
Document 3  In 1912, Washington Gladden, an influential white minister from Columbus, Ohio and Washington support asked Booker T. Washington to state his position on woman suffrage. Washington replied: I think you have expressed my own attitude very fully
asked by Cassidy 
English
1. I will opened the door. 2. The door will be opened by me. 3. The door shall be opened by me. (What is the passive form of Sentence 1?)
asked by rfvv 
8th History DBQ  Pls check my answer, thx!!!
Document 7: W. E. B. Du Bois publicly embraced the cause of woman suffrage after he moved north in 1907. The signs of awakening womanhood in the world today are legion. The best novelists are women. Some of the keenest essayists and graceful writers of
asked by Cassidy 
physical
24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.
asked by Jatindra Deori 
Calculus
For the parabola y^2=4px, where p, the focal length, is a constant, the focal point, f(p,0), is on the xaxis. Point S is 10 units from the point F and the segment SF makes a 60degree angle with the xaxis. The slope of segment TF is twice the negative of
asked by Anon 
chemistry
A solution is made by dissolving 811.0 cg of barium hydroxide, Ba(OH)2, in 0.1137 kg of water. What is the concentration in parts per million? I know the equation is: ppm= (mass of solute/mass of solution)10^6 Does the mass need to be in g or kg?
asked by erica 
Calc
A patient receives a 3 ml dose of medicine. The amount, y, of medicine in the body decreases at a rate of 15% per hour (dy/dt=.15y). When the medicine in the patient is down to 1 ml, the nurse administers a second 3 ml dose and plans to give the patient a
asked by Anon 
chem
The normal boiling point of Ta is 5425°C. What is its vapor pressure in mm Hg at 4384°C, if its heat of vaporization is 781.0 kJ/mol? Do I use the Clausiusclapeyron equation?
asked by anonymous 
Math
Canada ranks fifth in the world in the production of gold. By the end of one year, one of Canada's mines had produced about 198 t of gold since it opened. if the annual production averaged 4.5 t, predict the total production by the end of next year and the
asked by Han 
American History
What was the role of the northwest ordinance and what was its effect on the banning of slavery?
asked by Me and I 
Science
Hello :) For my assessment tomorrow, one of the things I have to think about is this: "Explained how the ear defenders will work using the Big Idea of Energy Transfer." I have no idea about this at all, please help!
asked by meh 
Science
How do I draw a particle diagram to show how ear defenders work?
asked by Pooja 
Social Studies
Briefly describe one way that these cultures changed the geography of the paces to which they migrated. 1. the ancient Romans who conquered much of Europe and England 2. homesteading families who migrated to the western territories of North America 3.
asked by Anonymous 
social st
Lower interest rates on certificates of deposit are associated with _______. higher account balances shorter maturities longer maturities a and b
asked by tota 
chemistry
What is the energy released when steam at 25 g of steam at 10 degree celcius is cooled to ice at10 degree celcius work heat change for the following changes calculated 150 degree Celsius steam 150 degree water 150 degree water to 0 degree water 100
asked by treasa 
math
. The nominal interest rate on your account is 7%; your semiannually effective rate of interest (APY) will be
asked by tota