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Questions Asked on November 21, 2011

A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.860 m/s encounters a rough horizontal surface of length = 0.65 m
1. 1 answer
2. asked by ann
3. 9,974 views
Salmon often jump waterfalls to reach their breeding grounds. One salmon starts 2m from a waterfall that is 0.55m tall and jumps
1. 2 answers
2. asked by Rychelle
3. 5,933 views
A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted
1. 2 answers
2. asked by paul
3. 5,409 views
The half-life of plutonium-234 is 9 hours. If 40 milligrams is present now, how much will be present in 4 days? (Round your
1. 1 answer
2. asked by meghan
3. 5,129 views
Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Use the following to calculate the grams of ethanol needed to
1. 2 answers
2. asked by Samantha
3. 3,272 views
Which of these people would be least likely to appreciate Transcendentalist ideas?a wildlife conservationist a minimalist a
1. 7 answers
2. asked by Anonymous
3. 3,030 views
the figure shows the graph of F', the derivative of a function f. the domain of the function f is the set of all X such that -3<
1. 1 answer
2. asked by Yoona
3. 2,801 views
A container in the form of a right circular cone of height 16 cm and base radius 4 cm is held vertex downward and filled with
1. 1 answer
2. asked by Helga
3. 2,714 views
An investigator was interested in studying the effect of taking a course in child development on attitudes toward childrearing.
1. 3 answers
2. asked by Jill
3. 2,693 views
if 4.4 moles of copper metal was deposited from a solution of Cu(NO3)2, how many electrons were involved?
1. 1 answer
2. asked by scott
3. 2,684 views
A car driving along a highway at a speed of 23 m/s strays onto the shoulder. Evenly spaced parallel grooves called “rumble
1. 4 answers
2. asked by Tom
3. 2,457 views
The length of a rectangle is twice the width. The area is 578 yd.^2. Find the length and width.
1. 1 answer
2. asked by Kelly
3. 2,377 views
what is the length of the shortest pipe closed on one end that will have a fundamental frequency of 60 hz on a day when the
1. 2 answers
2. asked by j. boateng
3. 2,179 views
A ball has a diameter of 3.86 cm and average density of 0.0836 g/cm3. What force is required to hold it completely submerged
1. 1 answer
2. asked by jim
3. 2,153 views
All of the following are characteristics of humanism except?
1. 2 answers
2. asked by Andrew
3. 1,977 views
Draw a Lewis dot diagram for NF2H and use the oxidation state method of electron bookkeeping to determine how many electrons
1. 2 answers
2. asked by Kali
3. 1,966 views
ABCD is a rectangle. If AC=5x+2 and BD=x+22, find x.
1. 2 answers
2. asked by Maggie
3. 1,905 views
Using grammatically correct English sentences describe how the nature of the bonding in MgF2 (s) and Zn(s) differ. (Don't just
1. 1 answer
2. asked by Matt
3. 1,859 views
Am I headed in the right direction.Sn + MnO4- --> Sn2+ + Mn2+ Sn --> Sn2+ + 2e- 5e + 8H + MnO4- --> Mn2+ + 4H2O If Im right what
1. 1 answer
2. asked by Monique
3. 1,815 views
a daredevil on a motorcycle leaves the ramp with a speed of 35.0 miles per hour. if his speed is 33.0 miles per hour when he
1. 1 answer
2. asked by nelo
3. 1,803 views
let f be the function defined by|x-1|+2 for X<1 f(x)= ax^2-Bx, for X>or equal to 1. where a and b are constants a)if a=2 and b=3
1. 2 answers
2. asked by Yoona
3. 1,785 views
A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of
1. 2 answers
2. asked by A
3. 1,780 views
In a recent survey in a Statistics class, it was determined that only 60% of the studentsattend class on Thursday. From past
1. 1 answer
2. asked by bilal
3. 1,733 views
A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an
1. 1 answer
2. asked by molly
3. 1,733 views
which of the following are redox reactionsa. 2Na+2H2O-->2Naoh+H2 b. MgBr2+2NaF-->MgF2+2NaBr c. 2CO+O2--> 2CO2 d. SO2+H2O-->
1. 2 answers
2. asked by Kali
3. 1,712 views
An engine of mass 5000 kg pulls a train of ten trucks each of mass 2000 kg along a horizontal track. Assume that the frictional
1. 1 answer
2. asked by as01
3. 1,701 views
what are the next 3 terms?12288, 3072 768 192
1. 1 answer
2. asked by Anonymous
3. 1,669 views
Hydrogen gas is produced when zinc reacts with sulfuric acid:Zn(s)+H_2SO_4(aq)---ZnSO_4(aq)+H_2(g) If 160 mL of wet H_2 is
1. 1 answer
2. asked by jas
3. 1,648 views
Is it appropriate to call a soft drink an aqueous solution? Justify your answer
1. 2 answers
2. asked by Kali
3. 1,505 views
Consider the following reaction:C6H5CL+C2HOCL3=>C14H9CL5+H20 If 1142 g of C6H5CL is reacted with 485 g of C2HOCL3, what mass of
1. 1 answer
2. asked by Clara
3. 1,499 views
An object wuth a mass of .5 kg starts from rest and achieves a maximum speed of 20m/s in 0.01 s. What average unbalanced force
1. 2 answers
2. asked by Ronaldo
3. 1,467 views
The light source located 2.75 m from a surface produces an illumination of 528 lux on that surface. Find the illumination if the
1. 0 answers
2. asked by Arielle
3. 1,437 views
I compare wartime propaganda posters.first one is - remember hong kong! i google search it and it come. message it give out i
1. 5 answers
2. asked by Mohammad
3. 1,380 views
The kinetic energy of a moving body is directly proportional to its mass and the square of its speed. If the mass of a bullet is
1. 1 answer
2. asked by Arielle
3. 1,314 views
A sample of gas at 1.3 atm of pressure is in a 2.0 L container. What will the pressure be if the sample is transferred to a 0.90
1. 3 answers
2. asked by Danielle
3. 1,278 views
A worker pushing a 35.0-kg wooden crate at a constant speed for 13.7 m along a wood floor does 390 J of work applying a constant
1. 2 answers
2. asked by raj
3. 1,267 views
Your physics teacher assigned a thermometer-building project. He gave you a glass tube with an inside diameter of 1.15 mm and a
1. 2 answers
2. asked by maria
3. 1,188 views
find L- Hospitallim x_---- inf 1/e^(-x)=
1. 2 answers
2. asked by saud
3. 1,158 views
How many moles of ammonium chloride could be found in 100g of water at 70 degrees celsius?
1. 1 answer
2. asked by Sarah
3. 1,157 views
the consumption of natural gas by a company satisfies the empirical equation V= 1.5t + 0.008t^2 where V is in volume in millions
1. 2 answers
2. asked by ANN
3. 1,147 views
A right circular cone has a constant volume. The height h and the base radius r can both vary. Find the rate at which h is
1. 1 answer
2. asked by Helga
3. 1,124 views
The force of attraction between the earth and some object is called the weight of that object. The law of gravitation states,
1. 1 answer
2. asked by Arielle
3. 1,121 views
In Psychology, it is a well known fact that one can change oneself through positive self-affirmation & visualisation .It is
1. 0 answers
2. asked by Susan
3. 1,118 views
If the principal P = $900, the rate r = 7 1/2 %, and time t = 1 year, find the following. What is the amount of interest?What is
1. 1 answer
2. asked by MONICA
3. 1,112 views
Please show me how to solve:Hannah took a survey of 500 students at her school to find out whether they liked baseball or
1. 0 answers
2. asked by Jane
3. 1,109 views
Many organizations find themselves in the apparently contradictory position of having high levels of financial investment in
1. 2 answers
2. asked by Edwin
3. 1,108 views
a 1.29 kg ball is connected by means of two massless strings to a vertical, rotating rod. The strings are tied to the rod and
1. 3 answers
2. asked by K
3. 1,107 views
Suppose an astronomer oberserves a huge solar flare.Predict its effect on Earth in the next day or so. I put it would break
1. 0 answers
2. asked by Mika
3. 1,097 views
hey this is the original question my work is at the end i really need help in grammar and checking my work thanxxIn this lesson,
1. 1 answer
2. asked by zahra
3. 1,090 views
The ends of the two rods shown in the figure are separated by 2.97 mm at 24.3 °C. The left-hand rod is brass and 1.21 m long;
1. 0 answers
2. asked by maria
3. 1,087 views
A sample of helium gas has a pressure of 860 mm Hg at a temperature of 225 K. At what pressure (mm Hg) will the helium sample
1. 1 answer
2. asked by Anonymous
3. 1,056 views
The resistance of a wire is inversely proportional to the square of its diameter. If an AWG (American wire gauge) size 12
1. 1 answer
2. asked by Arielle
3. 1,052 views
1)20 mL of a saturated of potassium nitrae at 50oC. Approximately, what mass of solid will precipiatae from the solution?2)At
1. 5 answers
2. asked by Maame
3. 1,049 views
Please help me solveI have a budget of 5000, Labor is 1,835.00 a month what's the precentage a month Material is 18% a month how
1. 1 answer
2. asked by Lavern
3. 1,042 views
How would you prepare 1.00 L of an alchol water solution that is 5.00 vol % alchol.
1. 1 answer
2. asked by John
3. 1,042 views
The current i in a certain circuit is given byi=6.25e^-125t (amperes) where t is the time in seconds. At what time will the
1. 1 answer
2. asked by Joy
3. 1,034 views
What is the molarity of the hydrochloric acid solution used if 25mL of it reacted with excess calcium carbonate to produce 5.3g
1. 1 answer
2. asked by Jenn
3. 1,030 views
On a brisk walk a person burns about 325 Cal/h at this rate how many hours of brisk walk would it take to lose a pound of body
1. 1 answer
2. asked by bently
3. 1,030 views
At 40 c,the value of Kw is 2.9210-14.calculate the [H+] and [OH-] of pure water at 40 c.
1. 1 answer
2. asked by Dewa
3. 1,029 views
How long would it take to earn $7000 on a 3500 dollar investment at rate of 7.8% compounded continuously?Would it be something
1. 1 answer
2. asked by Sheila
3. 1,025 views
the consumption of natural gas by a company satisfies the empirical equation V= 1.5t + 0.008t^2 where V is in volume in millions
1. 0 answers
2. asked by ANN
3. 1,019 views
Use a graphing utility to approximate any relative minimum or maximum values of the function g(x)=x sqrt4-x Not getting this
1. 10 answers
2. asked by Ty
3. 1,008 views
Solve for x.ln (x + 2) - ln 36 = ln x
1. 1 answer
2. asked by Joy
3. 1,007 views
How to graph:x(x+3)^2 I understand its a cubic function. Anyone care to help me with solving and graphing it? thanks.
1. 1 answer
2. asked by John
3. 1,003 views
what is the concentration of a sugar solution that contains 8 g sugar dissolved in 500 ml of water? explain in ration form
1. 0 answers
2. asked by cheryl
3. 989 views
Three point charges are on the x axis: −2 ¦ÌCat −3 m, 8 ¦ÌC at the origin, and −10 ¦ÌC at 3 m. Find the force on the
1. 1 answer
2. asked by Anonymous
3. 989 views
2 hours after a given drug has been administered there is only 75% of it left in the body. a. What percentage of it leaves the
1. 0 answers
2. asked by Lindsey
3. 988 views
What substrate indicates the youngest and oldest beach?What are coral's symbionts?
1. 0 answers
2. asked by bj
3. 987 views
please help me solveThe oven temperature will increase by 45 degrees Fahrenheit per minute. When the oven is initially turned
1. 1 answer
2. asked by Lavern
3. 984 views
Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right?A)Da
1. 2 answers
2. asked by jake
3. 983 views
How do I create a quadratic equation that passes through the points (-1,2),(1,7),(4,5)?
1. 1 answer
2. asked by momo
3. 976 views
Calculate the partial pressure (in atm) of propane in a mixture that contains equal weights of propane (C3H8) and butane (C4H10)
1. 1 answer
2. asked by Anonymous
3. 965 views
An aqueous solution is 25 % mass % NaCI. The density of the solution is 1.05g/ml. What is the molarity of the solution?
1. 2 answers
2. asked by John
3. 957 views
A 130 kg astronaut (including space suit) acquires a speed of 2.80 m/s by pushing off with his legs from an 2000 kg space
1. 0 answers
2. asked by m
3. 956 views
The space shuttle uses fuel cells( AFC's) to produce electricity . In these fuel cells,O2 reacts with water and electrons to
1. 1 answer
2. asked by Devin Boutte
3. 949 views
can someone help me make a really short, brief history of Chad,Africa?
1. 6 answers
2. asked by Rebecca
3. 946 views
Nitrous oxide, N2O, has been used as a dental anesthetic. Suppose that the average speed of an N2O molecule at 25°C is 433 m/s.
1. 2 answers
2. asked by Samantha
3. 941 views
The individual amounts in the Accounts Receivable Debit column of a sales journal should be posted to the accounts receivable
1. 0 answers
2. asked by rozzell
3. 941 views
1. Find all rational zeros of the polynomial. Then determine any irrational zeros, and factor the polynomial completely.
1. 1 answer
2. asked by Josh
3. 939 views
What does 60 over 75 equal
1. 1 answer
2. asked by ciara
3. 931 views
Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right?A)Da
1. 1 answer
2. asked by jake
3. 930 views
20.2 g of potassium phosphate is dissolved into 650 ml of H2O
1. 3 answers
2. asked by maria
3. 916 views
a sample of nitrogen gas has a volume of 1.00 l at STP What is the temp in Celsius if the volume is 10.0 L at 2.00 atm* I know
1. 1 answer
2. asked by James
3. 914 views
bisi and ada age added up to 29, 7 years ago bisi was twice as old as ada, find their present age.
1. 1 answer
2. asked by emma
3. 913 views
suppose you made a buffer solution that was 0.050M in both HC2H3O2 and NaC2H3O2.Would the pH changes resulting from the addition
1. 1 answer
2. asked by chelsy
3. 903 views
if cosθ=2/3 and tanθ<0 find the exact valuesin(θ-5π/3) sin2θ cos2θ cos(θ/2) can some1 please help me?
1. 1 answer
2. asked by Yulieth
3. 902 views
Calculate the molar heat of neutralization in kJ/mol of the reaction between HA and BOH given the following information:The
1. 1 answer
2. asked by Melissa
3. 893 views
If the distance from the Earth to the moon is 3.84 x 105 km. How long would it take a radio wave with wavelength 413.8 m to
1. 1 answer
2. asked by Lizzy
3. 889 views
If you put a piece of iron in an aqueous solution of blue Cu2+ ions the spontaneous redox reactionFe+ Cu2+„³ Fe2+ Cu Will
1. 1 answer
2. asked by Kali
3. 886 views
what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio
1. 2 answers
2. asked by cheryl
3. 886 views
what is the theme for Robert Frost's poem "After Apple-Picking"?My long two-pointed ladder’s sticking through a tree Toward
1. 1 answer
2. asked by Shellby
3. 880 views
I urgently need you to check a few more sentences (infinitive/gerund) . Thank you very much.1) After that, we can establish an
1. 1 answer
2. asked by Henry2
3. 877 views
Can you give me a 6th grade sentence using the word calico,and a sentence using the word bravado please! ! !
1. 1 answer
2. asked by Laura
3. 870 views
A 54.5 kg. skateboarder starts out with a speed of 1.90 m/s. He does +80.0 J of work on himself by pushing with his feet against
1. 1 answer
2. asked by s
3. 852 views
How many grams of ammonia can dissolve in 100g of water at 22 degrees celsius?
1. 3 answers
2. asked by Sarah
3. 843 views
Which one of the following sentences contains an abstract noun?A. Logic is easily understood. B. The vase was quite expensive.
1. 2 answers
2. asked by cowgirl3
3. 824 views
what mass of SO2 is formed upon the complete combustion of 1.59g of methanethiol
1. 1 answer
2. asked by kisha
3. 813 views
was the oldest of the three africian kingdoms?
1. 1 answer
2. asked by haley
3. 807 views
Calculate the mass percent concentration of a solution made by dissolving 5.00g of NaCl in 25.0g of water?I got 5.00g/25.0g=0.2
1. 3 answers
2. asked by Sarah
3. 787 views
what is a good way to represent pan arabism
1. 12 answers
2. asked by historian
3. 786 views

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