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2011
February

Questions Asked on February 24, 2011

How much work must be done to stop a 1250 kg car traveling at 105 km/h?
1. 9 answers
2. asked by Emily Grossman
3. 13,953 views
A 65kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0m/s. a) How fast is he going as
1. 4 answers
2. asked by Emily Grossman
3. 8,148 views
If the speed of light through material Z is2.5×10^8 m/s, what is this material’s index of refraction? The speed of light in a
1. 2 answers
2. asked by Maria
3. 7,128 views
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40,and Alex spent twice as much as
1. 12 answers
2. asked by julia
3. 5,918 views
What type(s) of intermolecular force is (are) common to each of the following. (Select all that apply.)1) Xe and methanol
1. 1 answer
2. asked by Rebekah
3. 5,457 views
which property of a distilled water solution will not be affected by adding 50 mL of CH3OH to 100.mL of the water solution at
1. 2 answers
2. asked by Penny
3. 5,219 views
Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate
1. 1 answer
2. asked by Bryan
3. 4,948 views
Assume equal aqueous concentrations of each of the following substances. Which has the lowest freezing point?C2H12O6 CH3OH
1. 2 answers
2. asked by Jazmin
3. 4,707 views
A rectangle has a perimeter of 24 and an area of 35 square feet. What is the length and width of the rectangle?
1. 2 answers
2. asked by Jess
3. 4,442 views
A ski starts from rest and slides doen a 22 degree incline 75m long. a) if the coefficient of friction is 0.090, what is the
1. 2 answers
2. asked by Emily Grossman
3. 4,377 views
César le da consejos a un amigo en su primer día de trabajo porque el director de la cadena tiene muy mal humor. Escucha los
1. 1 answer
2. asked by Dave
3. 4,321 views
A ray of light has an angle of incidence of 30.4� degreeson a block of quartz and an angle of refraction of 20.7� degrees. What
1. 2 answers
2. asked by Maria
3. 4,215 views
Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes
1. 3 answers
2. asked by D
3. 4,055 views
Decide if the following function f(x) is differentiable at x=0. Try zooming in on a graphing calculator, or calculating the
1. 2 answers
2. asked by Abigail
3. 3,729 views
Two prospectors are pulling on ropes attached around the neck of a donkey that doesn’t want to move. Oneprospector pulls with
1. 2 answers
2. asked by Emilie
3. 3,405 views
an art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its
1. 2 answers
2. asked by ganash
3. 3,013 views
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement
1. 1 answer
2. asked by heather
3. 2,775 views
At a pressure of 405 kPa, the volume of a gas is 6.00 cm3. Assuming thetemperature remains constant, at what pressure will the
1. 2 answers
2. asked by sara
3. 2,744 views
Use the triple scalar product to determine whether the given points lie in the same plane.A(1, 2, 3), B(3, -4, 8), C(7, -1, 1),
1. 2 answers
2. asked by Jessica
3. 2,722 views
A state charges polluters an annual fee of $20 per ton for each ton of pollutantemitted into the atmosphere, up to a maximum of
1. 3 answers
2. asked by rosie
3. 2,649 views
suppose solute A has a partition coefficient of 4.0 between diethyl ether and water. Demonstrate that if 100mL of solution of
1. 3 answers
2. asked by Krystal
3. 2,613 views
The results of a medical test show that of 66 people selected at random who were given the test, 3 tested positive and 63 tested
1. 1 answer
2. asked by Robert
3. 2,390 views
in a closed system at 40 C, a liquid has a vapor pressure of 50 KPa. the liquid's normal boiling point could be(1)10 C (2)30 C
1. 3 answers
2. asked by Hannah
3. 2,343 views
as the pressure on a liquid is changed from 100.kPa to 120.kPa, the temperature at which the liquid will boildecease increase or
1. 3 answers
2. asked by Hannah
3. 2,179 views
One side of the roof of a building slopes up at 35.5°. A student throws a Frisbee onto the roof. It strikes with a speed of
1. 2 answers
2. asked by eric
3. 2,037 views
Two point charges are separated by 10.0 cm and have charges of 2.0 μC and -2 μC, respectively. What is the electric field at
1. 3 answers
2. asked by Anthony
3. 2,015 views
how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?
1. 1 answer
2. asked by franco
3. 2,012 views
How do I prepare 80 mL of 0.10 M HC2H3O2 from a 6.0 M solution of Acetic acid?How do I prepare 80 mL of 0.10 M NH3 from 6.0 M
1. 1 answer
2. asked by knswimmerkat
3. 1,974 views
divide 891 by 40 and write the quotient as a mixed number
1. 7 answers
2. asked by Greyson
3. 1,851 views
A magician pulls a tablecloth from under a 200 g mug located 30.0 cm from the edge of the cloth. The cloth exerts a friction
1. 3 answers
2. asked by eric
3. 1,775 views
The International Space Station, launched in November 1998, makes 15.65 revolutions around the earth each day in a circular
1. 2 answers
2. asked by andrea
3. 1,756 views
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the
1. 1 answer
2. asked by heather
3. 1,679 views
A proton has a mass of 1.672 X 10 -27 kg. What is its weight? (using 9.81 for gravity)
1. 1 answer
2. asked by Ashley
3. 1,651 views
In lab, the ratio of moles C2O4^2-/Fe^3+ was 0.0063 to 0.0017, which is 3.7 . However, I am having a hard time deducing the
1. 5 answers
2. asked by Alex
3. 1,645 views
Many organizational situations involve an audience that consists of a group of people. Which is an appropriate approach to
1. 6 answers
2. asked by Deb
3. 1,644 views
what are two equivalent fractions for 5/15?
1. 3 answers
2. asked by Anonymous
3. 1,639 views
The specific heat capacity of aluminum is 0.22 cal/g°C. How much energy needs to flow into 20.0 grams of aluminum to change its
1. 2 answers
2. asked by Kaitlin
3. 1,612 views
In a body of fresh water, a dissolved oxygen concentration of 0.262 or higher is usually needed to maintain a healthy aquatic
1. 2 answers
2. asked by Amy
3. 1,440 views
simplify the expression below(3x^2y-5xy+12xy^2)-(5xy^2+4xy) 3x^2y - xy + 17xy^2
1. 2 answers
2. asked by pavleen
3. 1,414 views
When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the
1. 2 answers
2. asked by Carl
3. 1,404 views
What is the pH of a solution that is 0.10 M CH3NH2 (methylamine) and 0.15 M methylammonium chloride?
1. 2 answers
2. asked by steve
3. 1,401 views
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40 , and Alex spent twice as much as
1. 2 answers
2. asked by Katherine
3. 1,392 views
A 214 kg boat is sinking in the ocean. The boat's weight is partially offset by the 790 N buoyant force of the water. What is
1. 1 answer
2. asked by Melissa
3. 1,307 views
The circumference of a sphere was measured to be 86.000 cm with a possible error of 0.5 cm. Use linear approximation to estimate
1. 0 answers
2. asked by Kong
3. 1,253 views
Lisa bought two equal pieces of fabric. She will cut squares for a quilt from the fabric. All together Lisa bought 5 yards 1
1. 1 answer
2. asked by Jess
3. 1,252 views
The velocity of a 2.5 kg block sliding down a frictionless inclined plane is found to be 1.58 m/s. 1.40 s later, it has a
1. 1 answer
2. asked by Nic
3. 1,235 views
chemist relate units of counting, of mass, and of volume to a single quanity called the _____.
1. 2 answers
2. asked by Chanice
3. 1,211 views
Write an equation for the reaction that takes place when LiOH is added to water.
1. 1 answer
2. asked by Stephanie
3. 1,200 views
To make 10 mL of 25 mM sodium standard, what volume of 1 M NaCl stock should be used?250 mL 2.5 mL 0.25 mL 0.5 mL None of these
1. 1 answer
2. asked by vivek
3. 1,197 views
Indicate the alternative that both correctly evaluates the following sentence and correctly explains the reason for the
1. 1 answer
2. asked by Hanna
3. 1,197 views
How to determine the molarity of a 1.8% NaCl solution.
1. 1 answer
2. asked by BILL
3. 1,173 views
I am writing a narrative with that involves multiple verbs in the PC/l’imparfait within the same sentence. I suspect there are
1. 2 answers
2. asked by Eleanor
3. 1,165 views
Write a program that asks for the length and width of two rectangles. The program should tell the user which rectangles has the
1. 2 answers
2. asked by Fran
3. 1,164 views
A ray of light is incident at an angle of 51.1� degreeson the surface of a piece of crown glass whose index of refraction is
1. 2 answers
2. asked by Maria
3. 1,135 views
Sorry for posting another quesiton..;f(x) = { -7x^2 + 7x for x<=0 { 3x^2 + 7x for x>0 According to the definition of derivative,
1. 4 answers
2. asked by Cesar
3. 1,133 views
Are my sentences of appositive and appositive phrases correct?we planted a small tree, brought by my father, in the park and
1. 3 answers
2. asked by sgf
3. 1,132 views
Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an infinite number of solutions. What is diffrent about these
1. 1 answer
2. asked by CJ
3. 1,129 views
Can you please check these sentences for me, please? Thank you very much.1)The avenger is involved in complex planning. 2) A lot
1. 1 answer
2. asked by Mike
3. 1,121 views
Mary leaves a dock paddling her canoe at 3m/s. She heads downstreamat an angle of 30 degrees to the current which is flowing at
1. 0 answers
2. asked by Kevinn
3. 1,116 views
In a body of fresh water, a dissolved oxygen concentration of 0.262 or higher is usually needed to maintain a healthy aquatic
1. 2 answers
2. asked by Amy
3. 1,115 views
How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C?A) 0.00027 B) 3 C)
1. 1 answer
2. asked by Kaitln
3. 1,105 views
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top
1. 1 answer
2. asked by jr
3. 1,094 views
I have this chart thing made for french with all the months, and I basically have to list down holidays and stuff which occur in
1. 1 answer
2. asked by Ayu
3. 1,092 views
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it
1. 1 answer
2. asked by D
3. 1,088 views
I have 5 books. Each book weighs 1 kilogram 250 grams. How much is the total weight?
1. 3 answers
2. asked by Jess
3. 1,064 views
A uniform spherical shell of mass M = 8.00 kg and radius R = 0.550 m can rotate about a vertical axis on frictionless bearings.
1. 1 answer
2. asked by jr
3. 1,051 views
The formation of nitroanalyine (an important intermediate in dyes, called ‘fast orange’)is formed from the reaction of
1. 0 answers
2. asked by john
3. 1,032 views
An Atwood's machine consists of masses m1 and m2, and a pulley of negligible mass and friction. Starting from rest, the speed of
1. 0 answers
2. asked by devin
3. 1,021 views
Two banked curves have the same radius. Curve A is banked at 11.0 °, and curve B is banked at an angle of 17.4 °. A car can
1. 3 answers
2. asked by heather
3. 1,018 views
If I put my finger in a glass of water or a glass of oil, which would make my finger look bigger and why?I think it would be oil
1. 2 answers
2. asked by Ray S.
3. 1,005 views
A nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 ´ 10‑6 W‑m. What is the resistance per unit length of this
1. 1 answer
2. asked by Anthony
3. 995 views
gcf of 8/5
1. 4 answers
2. asked by mohamed
3. 976 views
Which of the following would be classified as an informative or positive message?a) A request for information b) An announcement
1. 1 answer
2. asked by Hanna
3. 971 views
A lawn roller is rolled across a lawn by a forceof 109 N along the direction of the handle, which is 24.2� above the horizontal.
1. 1 answer
2. asked by pete
3. 971 views
Q;Which of the following is an obstacle to learning for a beginning mover? A.knowledge of what elements of the movement to focus
1. 2 answers
2. asked by alex
3. 964 views
The force on a 0.80 m wire that is perpendicular to Earth's magnetic field is 0.12 N. What is the current in the wire?
1. 0 answers
2. asked by Crystal
3. 961 views
A mass m = 0.225 kg on a frictionless table is attached to a hanging mass M = 0.330 kg by a cord through a hole in the table
1. 1 answer
2. asked by Nic
3. 947 views
A con of soda displaces 3.79 * 10^-4 m^3 of water when completely submerged. Each 0.018 kg can contains 3.54 * 10^-4 m^3.Compare
1. 4 answers
2. asked by Kendra
3. 943 views
Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5)."Please help me solve this"
1. 1 answer
2. asked by esther
3. 941 views
In a body of fresh water, a dissolved oxygen concentration of 0.262 or higher is usually needed to maintain a healthy aquatic
1. 2 answers
2. asked by Amy
3. 939 views
Jake has 3/4 of a dollar. Max has 1/10 of s dollar do they have more or less then $1.00 in all?
1. 3 answers
2. asked by davy
3. 931 views
A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of
1. 1 answer
2. asked by jb
3. 928 views
A large community hospital, River Valley, has recently begun to acquire physician practices. At issue is whether to rename each
1. 2 answers
2. asked by shabana
3. 926 views
In Newtopia, inflation runs at 15%. A home entertainment unit currently sells for $2000.A) How much would you expect it to cost
1. 1 answer
2. asked by Anonymous
3. 925 views
Indicated whether the calculated molarity of NaOH would be lower or higher Than the real value; or unaffected?a) the water of
1. 2 answers
2. asked by Grettel
3. 916 views
I don't know where to start with it?A tube is set up for radioimmunoassay containing antibody with a capacity for binding 1ug
1. 0 answers
2. asked by Isa
3. 911 views
Which process will double the power given off by a resistor?a. Doubling the current while doubling the resistance b. Doubling
1. 0 answers
2. asked by Anthony
3. 909 views
arguments and counterarguments in "A Vindication of the Rights of Woman"
1. 2 answers
2. asked by Exie
3. 903 views
How to write an algorithm to find the fibonacci series ???Help:/
1. 1 answer
2. asked by Nelly
3. 894 views
Hi there!I know two languages so far English and Russian. (I know the Russian language as well as I know English.) So, I was
1. 6 answers
2. asked by Rita
3. 891 views
A farmer needs to spread fertiliser over a paddock measuring 40m by 80m. The instuctions on the fertiliser bag say to use
1. 1 answer
2. asked by Anonymous
3. 888 views
the quotient of h and -6 is at least 5. in equation form
1. 2 answers
2. asked by Mike
3. 883 views
What is the greatest and least possible product you can make using the digits 1,3,5,6 and 7 in the multiplication problem below?
1. 2 answers
2. asked by Val
3. 877 views
Document Based Question EssayQuestion: The debate over the extent of federal power with regard to the states dominated the
1. 5 answers
2. asked by Isabella
3. 863 views
I am researching on a butterfly named Holly Blue. I know they live in gardens and woodlands. I need help because I want to know
1. 8 answers
2. asked by Blue
3. 863 views
Explain how you would prepare these solutions from powdered reagents and whatever glassware you needed:a. 2.0 L of 1.5 M KOH the
1. 1 answer
2. asked by lesa
3. 857 views
Add itHow are these words alike? add more. made,play,train...
1. 3 answers
2. asked by Jessica
3. 852 views
A point on the rim of a 0.75 m diameter grinding wheel changes speed at a constant rate from 15 m/s to 21 m/s in 6.2 s. What is
1. 2 answers
2. asked by Britney
3. 850 views
Is this a good thesis statement?John Keats' odes and letters advance the Romantic literary movement through use of three common
1. 1 answer
2. asked by Norah
3. 845 views
Would changing the frequency of a wave cause a change in amplitude? I would say only if the wave velocity remains the same
1. 2 answers
2. asked by Joelle
3. 833 views

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