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2011
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Questions Asked on February 27, 2011

how many grams of NaCl (molecular weight 58.5) should be used to prepare 20 liters of a solution containing 154mEq/L?
1. 2 answers
2. asked by mary
3. 6,515 views
The drawing shows an extreme skier at bottom of a ski jump. At this point the track is circular with a radius r. Two forces act
1. 7 answers
2. asked by annie
3. 5,925 views
Numbered disks are placed in a box and one disk is selected at random. There are 6 red disks numbered 1 through 6, and 7 yellow
1. 2 answers
2. asked by Anonymous
3. 4,656 views
Need some advice!What to do the with the class for the first time? I don't know the class and they don't know me. They are not
1. 5 answers
2. asked by tee
3. 4,630 views
What? If anything, is wrong with the following sets of quantum numbers.a. n = 2, l = 2, ml = 0, ms = +1/2 b. n = 0, l = 0, ml =
1. 2 answers
2. asked by Kelly
3. 4,102 views
A floor is covered by 800 tiles measuring 10 cm square.How many square tiles of side 8 cm would be needed to cover the same
1. 3 answers
2. asked by sweety
3. 3,635 views
Karen has a mass of 52.7 kg as she ridesthe up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a
1. 1 answer
2. asked by Mike
3. 2,896 views
Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.
1. 4 answers
2. asked by Trudy
3. 2,768 views
let d2y/dx2= 6x. Find a solution to the differential equation that is continuous for negative infinity to positive infinity and
1. 1 answer
2. asked by Anastasia
3. 2,729 views
please help. Compute Δy and dy for x = 4 and dx = Δx = -0.2. (Round the answers to three decimal places.)y = 4x - x2....im
1. 1 answer
2. asked by nic
3. 2,714 views
a midwestern music competition awarded 32 ribbons. the number of blue ribbons awarded was 3 less than the number of white
1. 3 answers
2. asked by victoria
3. 2,564 views
The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air
1. 1 answer
2. asked by Dave
3. 2,521 views
The company you work for plans to release a waste stream containing 7 mg/Lof benzaldehyde . Assuming that benzaldehyde degrades
1. 1 answer
2. asked by Jazmin
3. 2,489 views
When acetone is added to saturated sodium chloride, the equilibrium shifts toward the right. What is the role of acetone in
1. 2 answers
2. asked by redgy
3. 2,397 views
A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two
1. 2 answers
2. asked by shannon
3. 2,387 views
15.A 3.0 kg block is pushed 3.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 30.0�
1. 3 answers
2. asked by jeff
3. 2,370 views
A woman pushes a lawn mower with a con-stant force of 112 Newtons at an angle of 37degrees with respect to the horizontal. The
1. 1 answer
2. asked by James
3. 2,366 views
A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 8 m/s, find the
1. 2 answers
2. asked by Lesley
3. 2,265 views
1) The 17th hole at the famous st andrews golf course is 420 m in length.How long will it appear on a plan of the course of
1. 1 answer
2. asked by sweety
3. 2,122 views
A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?
1. 2 answers
2. asked by Lesley
3. 1,984 views
the distance from hertford to st albans is 32 km. how far apart will they be on a map of scale 1:50000?
1. 2 answers
2. asked by sweety
3. 1,706 views
An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the
1. 1 answer
2. asked by Lesley
3. 1,618 views
in the late nineteenth century:how could trusts purchase a senate seat? what were the sympathies of the national government
1. 1 answer
2. asked by Kayla
3. 1,580 views
How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?
1. 2 answers
2. asked by Lesley
3. 1,578 views
a ferris wheel has a radius of 10m and is one meter above the ground. If the ferris wheel makes 1 revolution every 20 seconds,
1. 1 answer
2. asked by Meg
3. 1,542 views
Consider the reaction shown below.4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol
1. 1 answer
2. asked by Mattie
3. 1,539 views
Consider the titration of a 35.0-mL sample of 0.175 M HBr with 0.200 M KOH. Determine the pH after adding 5.0 mL of base beyond
1. 1 answer
2. asked by Brian
3. 1,521 views
why might you not observe a reaction even though an activity series indicates it should occur?
1. 1 answer
2. asked by mel <3
3. 1,515 views
In how many ways can 5 boys and 5 girls be seated around a table so that no 2 boys are adjacent?
1. 2 answers
2. asked by Rey
3. 1,485 views
A phonograph record has an initial angular speed of 37 rev/min. The record slows to 10rev/min in 1.3 s. What is the record’s
1. 1 answer
2. asked by Kara
3. 1,470 views
if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why
1. 1 answer
2. asked by ashley --- HELP PLEASEE!!!
3. 1,440 views
Solve the problem.A salesperson gets a commission of $600 for the first $10,000 of sales, and then $300 for each additional
1. 0 answers
2. asked by brad
3. 1,401 views
Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J.Answer in units of m/s.
1. 1 answer
2. asked by James
3. 1,361 views
A car accelerates from 25km/hr to 55km/hr in 30 seconds. What is its acceleration?
1. 3 answers
2. asked by Anonymous
3. 1,351 views
The population of SAT scores forms a normal distribution with a mean of µ =500 and a standard deviation of Ïƒ =100. If the
1. 1 answer
2. asked by T
3. 1,306 views
I'm a bit confused about the average equations with integration. I need to solve this problem, and I think I'm supposed to use
1. 1 answer
2. asked by Rachel
3. 1,305 views
Part 1You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 10000 N on a cannon
1. 0 answers
2. asked by Mike
3. 1,282 views
If an average-size man with a parachute jumps from an airplane, he will fall 12.5(0.2t - 1) + 19t feet in t seconds. How long
1. 2 answers
2. asked by amber
3. 1,279 views
The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?
1. 1 answer
2. asked by Rachael
3. 1,267 views
A 5 feet long ladder leans against a wall and makes an angle of 65 degrees with the ground. find, to the nearest tenth of a
1. 1 answer
2. asked by Anonymous
3. 1,256 views
are the female characters victims or natural survivirs and do they deserve more pity or admiration? in Candide
1. 2 answers
2. asked by ricki
3. 1,256 views
I have to submit a complaint on any advertisment which I think should be bannedAnd it should be one that you feel violates any
1. 2 answers
2. asked by Anonymous
3. 1,234 views
ms.pritchard wrote the following inequality on the board 5.6 with the sign greater on equal to then negative fourteen what
1. 1 answer
2. asked by brooke
3. 1,228 views
Thank you for your prompt response. I have my homework I have to turn in in about 2 hours, but i am struggling to solve this
1. 2 answers
2. asked by esther
3. 1,223 views
Which of the following statements is not true about a particle executing Simple Harmonic Motion?Choose one answer. a. Its
1. 7 answers
2. asked by calous --- HELP PLEASEE!!!
3. 1,214 views
When a rattlesnake strikes, its head accelerates from rest to a speed of 30 m/s in 0.64 s seconds. Assume for simplicity that
1. 1 answer
2. asked by Mike
3. 1,214 views
Find an equation in slope-intercept form passing through the points (2,5) and (7,-3).M=(-3,-5)/(7,-2) M=-8/5 IS THE SLOPE
1. 2 answers
2. asked by bianca
3. 1,201 views
In the following problems, you will calculate the “simple metrics” for project selection. For these problems, please use the
1. 1 answer
2. asked by Anonymous
3. 1,179 views
explain the difference in boiling points of acetone and 1 proponol. (proponol higher) also explain the difference in water
1. 1 answer
2. asked by z
3. 1,175 views
How many different points of intersection are there for x + y = 7 and y = x squared minus 7?
1. 1 answer
2. asked by Jack
3. 1,158 views
A student weighing 700 N climbs at constantspeed to the top of an 8 m vertical rope in 10 s. The average power expended by the
1. 2 answers
2. asked by jeff
3. 1,147 views
The edge of one cube is 2 cm shorter than the edge of a second cube. The volumes of the two cubes differ by 386 cm^3. Find the
1. 0 answers
2. asked by K.S.
3. 1,137 views
An ideal spring has a spring constant k = 20.0 N/m. What is the amount of work that must be done to stretch the spring 0.70 m
1. 1 answer
2. asked by henry287
3. 1,118 views
okay i have this writing assignment on how drunk driving can be stopped ..i have like three sentences to complete it and these
1. 1 answer
2. asked by Anon
3. 1,115 views
Find the area in the second quadrant bounded by the x-axis and f(x)=sqrt((x^3/8)+1)
1. 2 answers
2. asked by Hannah
3. 1,106 views
Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the
1. 1 answer
2. asked by amber
3. 1,101 views
It is known that an exam scores of students in STAT 2507 follow a normal distribution with a meanof 70% and a standard deviation
1. 1 answer
2. asked by Adam
3. 1,081 views
A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the
1. 1 answer
2. asked by T.
3. 1,074 views
Two skaters are in the exact center of a circular frozen pond. Skater 1 pushes skater 2 off with a force of 100 N for 1.4
1. 0 answers
2. asked by James
3. 1,057 views
Consider a weak acid-strong base titration in which 25.0 mL of 0.100 M acetic acid is titrated with 0.100 M NaOH.a) Calculate
1. 1 answer
2. asked by Jon
3. 1,055 views
Calculate the concentration of all species in a 0.15 M KF solution. Ka = 6.4 x 10-4 for HF.
1. 3 answers
2. asked by Brian
3. 1,050 views
The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a
1. 0 answers
2. asked by j
3. 1,048 views
22.a)You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 20000 N on a cannon
1. 1 answer
2. asked by jeff
3. 1,038 views
need help in solving how many miles can i drive on 60 gallons of gas, with the Mpg 30 in the city, and 42 highway. I would like
1. 5 answers
2. asked by Dee
3. 1,026 views
Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30"Using the
1. 1 answer
2. asked by Anon
3. 1,012 views
A marble is 12mm in diameter. What is the smallest height box that is 96mm square that can hold 200 marbles and still have the
1. 0 answers
2. asked by Sally
3. 999 views
A billiard ball of mass m = 0.150 kg hits the cushion of a billiard table at an angle of θ1 = 60.0° at a speed of v1 = 2.50
1. 1 answer
2. asked by Em
3. 988 views
A diet management system produces two types of foods A and B. Food A contains (5,15,1,2) mg. per ounce of cholesterol, calcium,
1. 1 answer
2. asked by Tracy
3. 985 views
Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the
1. 0 answers
2. asked by Anonymous
3. 963 views
A student uses a spring to launch a marble vertically in the air. The mass of the marble is 0.002 kg and when the spring is
1. 1 answer
2. asked by Lesley
3. 963 views
What's the function?x= 2, y=14 x=10, y=54 x=8, y=44 x=?, y=34 x=?, y=104 x=?, y=31 I thought it was multiply by 5, add 4 but
1. 1 answer
2. asked by David
3. 946 views
if cos(pi/4) is sqrt2/2i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.
1. 1 answer
2. asked by tom
3. 945 views
Factorise x^2+y^2
1. 1 answer
2. asked by Anonymous
3. 930 views
A critical dimension of the service quality of a call center is the wait time of a caller to get to a sales representative.
1. 1 answer
2. asked by Anonymous
3. 929 views
half of a gallon is a half gallon. half of a half gallon is a quart. half of a quart is a pint. half of a pint is a cup. a cup
1. 2 answers
2. asked by Trevor
3. 924 views
1) The sum of last three terms of GP having n terms is 1024 time the sume of first 3 terms of GP. If 3rd term is 5. Find the
1. 1 answer
2. asked by Sniper
3. 923 views
Use a graphing calculator to graph f(x)=x^4-6x^3+11x^2-6x. Then use upper sums to approximate the area of the region in the
1. 1 answer
2. asked by Catalina
3. 918 views
How to press the value of log, to evaluate log, to find the unknown log using EL-531WH, advance D.A.L
1. 1 answer
2. asked by Eunthin
3. 918 views
Suppose a basketball player successfully makes 70% of the free throw shots they attempt. Let Xrepresent the number of successful
1. 1 answer
2. asked by Adam
3. 912 views
some examples of ads using play on words
1. 6 answers
2. asked by james jackson
3. 899 views
The pH of a 0.065 M solution of a weak base is 11.70. What is the value of Kb for this base?
1. 5 answers
2. asked by Brian
3. 898 views
derivate of 2sin(x)-cos(x)-cot(x)
1. 0 answers
2. asked by shakira
3. 886 views
Can someone please show me how to find the integral of sin squared x?
1. 0 answers
2. asked by lo
3. 880 views
State whether the following sequence is arithmetic, geometric, or neither.0, 1, 4, 9, 16, 25, 36, ....
1. 2 answers
2. asked by Anonymous
3. 870 views
how can i use the numbers 9 9 9 and 13 to make 24??
1. 2 answers
2. asked by math
3. 869 views
Can you help me check the following sentences I'm doubtful about? Thank you.1)The dragon tries to kill Beowulf with the flames
1. 1 answer
2. asked by Mike
3. 866 views
The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air
1. 0 answers
2. asked by Mike
3. 861 views
Suppose a basketball player successfully makes 70% of the free throw shots they attempt. Let Xrepresent the number of successful
1. 0 answers
2. asked by Adam
3. 859 views
How much work is needed to lift a 3 kg mass a distance of 0.75 m?
1. 1 answer
2. asked by Lesley
3. 844 views
Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the
1. 0 answers
2. asked by sam
3. 838 views
Bangs really confuse me:(Could I get a few notes on them please, I already checked the internet. B stands for beauty A stands
1. 3 answers
2. asked by Sidney
3. 827 views
A ball is thrown horizontally from a cliff a 8 m/s. How fast is it moving 2 s later?
1. 0 answers
2. asked by Brenda
3. 825 views
Cambridge Manufacturing Company, Inc. has 200 labor-hours available. There is no limit on machine hours. Cambridge can sell all
1. 0 answers
2. asked by Gail
3. 819 views
find third derivate f(x)=x/x+1
1. 2 answers
2. asked by shakira
3. 812 views
calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.
1. 1 answer
2. asked by michelle
3. 811 views
A stationary but moveable 450-kg cannon is fired and the 12-kg cannonball moves off to the right with a velocity of 20.0 m/s.
1. 2 answers
2. asked by Tina
3. 805 views
determine the domain for each function f(x)=6x^(2)-x-1, g(x)=x-1
1. 0 answers
2. asked by jason
3. 798 views
How will you find the height of a tall tower using a long-enough thread? You only have a stop-watch with you. So you can only
1. 2 answers
2. asked by calous --- HELP PLEASEE!!!
3. 796 views
Cindy will require $15,000 in 2 years to return to college to get an MBA degree. How much money should she ask her parents for
1. 1 answer
2. asked by amber
3. 793 views
If a student's percentile rank in a class of 400 students is 87, how do I find the student's class rank.
1. 2 answers
2. asked by David
3. 786 views

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