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Questions Asked on December 5, 2010

A 4.00-m-long, 500 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building
1. 1 answer
2. asked by Anonymous
3. 7,094 views
What is the lattice energy of NaBr?heat of formation of NaBr = -362 kJ/mol heat of sublimation for Na = 107.30 kJ/mol ionization
1. 2 answers
2. asked by chemistry
3. 4,542 views
What is the solubility equilibrium for Mn3(PO4)2?Isn't it this.. Mn3(PO4)2 (s) --> 3Mn^+2 (aq) + 2PO4^-3 (aq) but i keep getting
1. 3 answers
2. asked by Savannah S.
3. 4,400 views
lithium + gold(III) chloride +lithium chloride + goldneed to balance equation
1. 2 answers
2. asked by jin
3. 4,304 views
Convert to scientific notation: 0.000678
1. 1 answer
2. asked by estrella
3. 3,672 views
a 55 kg skateboarder starts out with a speed of 1.8 m/s. he does +80 J of work on himself by pushing with his feet against the
1. 1 answer
2. asked by Justin
3. 3,264 views
From the lewis structure of AlCl4- where should I place the formal charge? next to Al or Cl?
1. 1 answer
2. asked by Sarah
3. 3,125 views
When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying
1. 4 answers
2. asked by Jesse
3. 3,084 views
A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.9 m
1. 6 answers
2. asked by Sandi
3. 3,008 views
The gram-formula mass of NO2 is defined as the mass of one mole ofa. one mole of NO2 b. one molecule of NO2 c. two moles of NO
1. 2 answers
2. asked by danny123
3. 2,823 views
i really need help of this writing assigment. i have been working on it for hours now and my brain is just jammed. okay .. the
1. 7 answers
2. asked by Cas
3. 2,648 views
How many unpaired electrons are in the electron structure of 24 Cr, [Ar]4s1 3d5
1. 5 answers
2. asked by dody
3. 2,631 views
An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and
1. 1 answer
2. asked by MoMto2
3. 2,553 views
Quiz has 6 questions. Each question has five possible answers,only one of each 5 answers is correct. If student randomly guesses
1. 9 answers
2. asked by tanya
3. 2,538 views
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3).How much limestone
1. 2 answers
2. asked by amy
3. 2,471 views
An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5
1. 1 answer
2. asked by H
3. 2,408 views
hummingbird beats wings with frequency of 80.0 Hz. What is period of bird's flaps?I know T = 1/f , but what is the label/units
1. 1 answer
2. asked by anonymous
3. 2,123 views
describe how you would make a 2.5L of a .100M KCL solution from a 5.5M stock solution
1. 2 answers
2. asked by lily
3. 2,117 views
A 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and
1. 1 answer
2. asked by Kim
3. 2,059 views
Im am so lost....A bank conducts a survey in which it randomly samples 400 of it customers. The survey asks the customers which
1. 1 answer
2. asked by Kelly
3. 2,042 views
Use average bond energies to calculate delta Hrxn for C(s)+2H2O(g)-->2H2(g)+CO2(g)
1. 2 answers
2. asked by Kate
3. 2,000 views
Calculate the pH of 1.28×10−3 M KOH.thanks.
1. 3 answers
2. asked by amy
3. 1,942 views
A gymnast of mass 63.0 {\rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and
1. 2 answers
2. asked by Anonymous
3. 1,893 views
Given the compounds H2S, NH3, and SO2. Determine the order o boiling points. Rank them from highest to lowest boiling point.
1. 1 answer
2. asked by regina
3. 1,844 views
Given angle theta is bigger than 0 and smaller than 360, determine two possible values of theta where each ration would be true.
1. 1 answer
2. asked by Emily
3. 1,797 views
7. A researcher selects a random sample. A 90% confidence interval for a population mean A) is an interval with margin of
1. 1 answer
2. asked by Anonymous
3. 1,707 views
At the instant a traffic light turns green, a car starts moving with a constant acceleration a of 4.00 m/s2. At the same instant
1. 3 answers
2. asked by Brittany
3. 1,702 views
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many
1. 2 answers
2. asked by Matt
3. 1,664 views
What is the electron domain for:a)CH3I b)ClF3 c)H2S d)SO3 e)SO4^-2
1. 1 answer
2. asked by Sarah
3. 1,597 views
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat
1. 1 answer
2. asked by Josh
3. 1,533 views
if arc AC=140 degrees, what is angle ABC?if angle ABC=28 degrees, what is arc AC?
1. 2 answers
2. asked by Ian
3. 1,529 views
using the lewis dot structures, predict the formula for the compound formed between lithium and chlorine.
1. 2 answers
2. asked by becca
3. 1,490 views
the area of a triangle is 147 square inches and its height is 1.5 times its base. find the base and the height of the trianle.
1. 1 answer
2. asked by michelle
3. 1,443 views
What force is necessary for a person to hold a 50 kg mass over their head?
1. 2 answers
2. asked by machaila
3. 1,428 views
a simple pendulum with the length of 2.08m oscillates. the acceleration of gravity is 9.8 m/s^2.how many complete oscillations
1. 2 answers
2. asked by Harmonie
3. 1,419 views
Density is calculated by dividing the mass of an object by its volume. The Sun has a mass of 1.99×1030 kg and a radius of
1. 2 answers
2. asked by amber gorman
3. 1,413 views
how many moles of oxygen are needed to react with 1.6 moles of isopropyl alcohol, CcH7OH Equation is 2 C3H7OH + 9 02 ->6 CO2 + *
1. 2 answers
2. asked by dody
3. 1,405 views
johnny is directly in front of dougie, who is playing goalie as shown. johnny is 2.8m from both goal posts. he is also three
1. 1 answer
2. asked by Sarah
3. 1,397 views
Wen 4Ag + 2H2S + 02 -> 2Ag2S + 2H20 and the reactants inclde 12 mol Ag, 6 mole of H2S and 96 G of 02 the limiting reactant is?
1. 1 answer
2. asked by dody
3. 1,396 views
Which statement is true about a triangular prism?a. It has exactly 1 pair of parallel faces b. It has not parallel edges c.It
1. 9 answers
2. asked by Debbi
3. 1,394 views
Why was there condensation of the beaker of cold water when a blue flamewas passes underneath? This experiment is from the Gas
1. 1 answer
2. asked by Ivy
3. 1,346 views
How did movable type help the Chinese to record their knowledge in a permanent form?
1. 4 answers
2. asked by Alexis
3. 1,338 views
If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B?Grade Frequency A 2
1. 6 answers
2. asked by Shannon
3. 1,312 views
Determine how many orders of magnitude the quantities differ.A canary weighing 20 g and a hen weighing 2 kg. I want to say 1 but
1. 1 answer
2. asked by Courtney
3. 1,301 views
okay i read the book Royally Jacked for english and i had to return the book and i need to finsh my book report ASAP !i need to
1. 1 answer
2. asked by taylor
3. 1,300 views
The blades of a ceiling fan have a radius of 0.399 m and are rotating about a fixed axis with an angular velocity of +1.65
1. 1 answer
2. asked by Josh
3. 1,286 views
Please check the meaning: "Like a cat in a corn crib, the girl pup sneaked in from behind and sank her needlesharp teeth in the
1. 6 answers
2. asked by Anonymous
3. 1,278 views
Consider two vectors where F1 = 38 N, F2 = 58 N, and = 240o and = 25o, measured from the positive x-axis with counter-clockwise
1. 2 answers
2. asked by ray
3. 1,258 views
For a molecule of fluorous acid, the atoms are arranged as HOFO.What is the formal charge on each of the atoms? Enter the formal
1. 1 answer
2. asked by Rita
3. 1,258 views
A bullet of mass 0.02kg is fired at a speed of 500m/s towards a fixed wooden block of thickness 10cm. The bullet penetrates the
1. 2 answers
2. asked by laura
3. 1,238 views
oxalic acid, h2c2o4, is a weak acid capable of providing two H3O+ ions.ka=.059 k2=6.4E-5 the [h3o]+ in a .38 M solution of
1. 1 answer
2. asked by anonymous
3. 1,233 views
What volume of 0.115M NaOH is required to reach the equivalence point in the titration of 25.00 mL of 0.200M of HF?Ka(HF)=7.4 x
1. 1 answer
2. asked by csb
3. 1,190 views
Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A
1. 0 answers
2. asked by dillon
3. 1,181 views
Find the interval(s) where the function is increasing where and it is decreasing.f(x)=sin(x+(pi/2)) for 0≤x≤2pi so my
1. 3 answers
2. asked by sh
3. 1,159 views
Figure 6-43 shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal
1. 2 answers
2. asked by :)
3. 1,145 views
What is the original molarity of a solution of weak acid whose Ka= 3.5 x 10^ -5 and pH is 5.20...I'm lost, please help!
1. 1 answer
2. asked by Savannah S.
3. 1,145 views
I have two problems i don't understand if you could solve and show me what you did I would appreciate it :)1.A 62.0-kg person,
1. 0 answers
2. asked by Deanna
3. 1,127 views
A ball is attached by two spring as shown [vvvOvvv]. If the mass is displaced a distance â–³x BELOW the equilibrium position
1. 0 answers
2. asked by Marco
3. 1,120 views
a fan uses 150j of mechanical energy, 20j of heat and 75j of sound energya) what is the total input energy b) what is the total
1. 0 answers
2. asked by Anonymous
3. 1,115 views
Determine which lines, if any, are parrell or perpindicularlinea= y=4x line B= y=-1/4x line c= y= 4x-1 I think line B and A are
1. 1 answer
2. asked by Allyson
3. 1,110 views
There are three distinct ways to add four positive odd numbers to obtain 10:1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3
1. 0 answers
2. asked by SkaterGirl
3. 1,109 views
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted atthe top with a piston,
1. 1 answer
2. asked by Matt
3. 1,106 views
Thank you very much for your corrections. I still have a few questions on my previous post.1. I'm as fast as a lightning. I'm
1. 1 answer
2. asked by Franco
3. 1,103 views
what will be the pH change when 20 mL of .1M NaOH is added to 80 mL of a buffer solution consisting of .164M NH3 and .187M
1. 1 answer
2. asked by anonymous
3. 1,080 views
Use the University Library or the Electronic Reserve Readings to locate a peer-reviewed article that reports original research.S
1. 1 answer
2. asked by Rowena
3. 1,072 views
Predict the products of the chemical reactionaluminum + iron(III) oxide
1. 2 answers
2. asked by Pedro
3. 1,070 views
A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a
1. 2 answers
2. asked by angela
3. 1,070 views
If tanx=5/12 then what is sinx/2?
1. 1 answer
2. asked by Jon
3. 1,069 views
Where was the greatest single American loss in the war? Charleston ?
1. 1 answer
2. asked by Taylor
3. 1,067 views
Dissolve 1.5g of an unknown salt into 37g of water and find that the new vapor pressure at 75C is 277 torr. What is the Molar
1. 2 answers
2. asked by regina
3. 1,066 views
A beam of electron is accelerated by a potential difference of 2.5okV. The electrons are then allowed to pass into a magnetic
1. 2 answers
2. asked by Farah
3. 1,063 views
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance of 5.00 cm from its
1. 2 answers
2. asked by Anonymous
3. 1,052 views
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 6.2 m higher than A, with speed
1. 0 answers
2. asked by anna
3. 1,038 views
Two blocks are arranged. M1 is on the table and m2 is hanging from the pulley. The pulley can be considered to be massless, and
1. 1 answer
2. asked by helena
3. 1,018 views
what is the velocity of a boat traveling 60 km in 2 hours?
1. 4 answers
2. asked by Taylor
3. 1,018 views
A solid sphere of radius 3 cm and mass of 100 g rolls down a 30 degree incline from a height of 1 m. A hoop of the same mass and
1. 1 answer
2. asked by Ama
3. 1,011 views
What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions?I am
1. 2 answers
2. asked by Nathan
3. 1,009 views
Since BrF3 and ClF5 do not obey the octet rule. Did IF7 obey the octet rule? Yes or No?
1. 1 answer
2. asked by Sarah
3. 1,004 views
I have a paper due where I have to develop a healthy eating plan. I have the paper almost completed but I need a little help in
1. 0 answers
2. asked by Anonymous
3. 1,003 views
An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and
1. 0 answers
2. asked by MoMto2
3. 1,003 views
Richard took a loan of $10000 at a rate of 5%. If he paid $2500 in interest, how long did it take him to pay off the loan?
1. 1 answer
2. asked by Troy
3. 988 views
A student draws four resonance structures for nitromethane (CH3NO2). How many lewis structures should have been drawn to
1. 0 answers
2. asked by Amy
3. 984 views
What are the ethical standards in policing? I'm not exactly understanding what they mean by this
1. 1 answer
2. asked by Donald
3. 980 views
I need help with part b... I found in part a that delta L is .29568m and I think I might be doing something wrong with the units
1. 0 answers
2. asked by Anonymous
3. 976 views
If a heterozygote is crossed with a recessive individual, what % of their offspring will be recessive (have light hair)?
1. 4 answers
2. asked by June
3. 973 views
GRE question - What is greater z or 60? z is the degrees of a one of the congruent sidesAn isoceles triangle
1. 0 answers
2. asked by Lisa
3. 968 views
what does customer pays $150.00 toward account at store. What does that look like using specialized journals, general ledger and
1. 0 answers
2. asked by Barb
3. 967 views
f two indistinguishable dice are rolled, what is the probability of the event {(3, 3), (2, 3), (5, 3)}?1 What is the
1. 1 answer
2. asked by Liz
3. 965 views
Need Help On This Question.!Potassium chloride reacts with bromine forming potassium bromide plus chlorine. If 500g of potassium
1. 1 answer
2. asked by Jacky
3. 955 views
A 3.26 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 29.0°
1. 0 answers
2. asked by lucy
3. 950 views
In store credit customer makes purchase on account for $50.00, invoice #18. What do the enteries look like using specialized
1. 0 answers
2. asked by Barb
3. 941 views
At a Amusement PArk you can buy tickets for 12 rides for $15. At that rate, how many tickets would you be able to buy for
1. 3 answers
2. asked by Serrena
3. 935 views
two particles of mass m1 and m2 are joined by a massless spring of spring constant k and natural length L.Initially m2 is on
1. 0 answers
2. asked by Anonymous
3. 934 views
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the
1. 0 answers
2. asked by Lynette
3. 932 views
The free-fall acceleration on Mars is 3.7 m/s2.(a) What length pendulum has a period of 4 s on the earth? cm What length
1. 1 answer
2. asked by Albert
3. 920 views
1. Harry accidentally falls out of a helicopter that is traveling horizontally at 100 m/s. He plunges into the ocean below him
1. 5 answers
2. asked by Anonymous
3. 918 views
A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has
1. 7 answers
2. asked by Alex
3. 906 views
Multiply and then simply by factoring (√2y)(√3)(√8y)
1. 3 answers
2. asked by beth
3. 901 views
am writeing self-relection essay abt the theme self perceiving society,society perceiving self, i dontknow how to start my
1. 1 answer
2. asked by mercy
3. 900 views
What does "seek to Serve" mean?
1. 2 answers
2. asked by kathy
3. 893 views

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