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Questions Asked on March 31, 2010

At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of –0.40 rad/s^2 has an angular velocity of
1. 2 answers
2. asked by Jared
3. 8,127 views
A 70kg man jumps 1.00 meters down onto a concrete walkway. His downward motion stops in 0.02 seconds. If he forgets to bend his
1. 3 answers
2. asked by Omari
3. 7,324 views
an electric current I , in amps is given by:I= cos(wt) + sqrt of 3 sin(wt) where w is positive constant. what are the max and
1. 3 answers
2. asked by miley
3. 6,740 views
1. Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirinand dyes. One way that chlorobenzene is prepared
1. 2 answers
2. asked by Michael
3. 6,198 views
How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an
1. 5 answers
2. asked by Kim
3. 4,413 views
A plane flying a straight course observes a mountain at a bearing of 32.6° to the right of its course. At that time the plane
1. 2 answers
2. asked by pepe
3. 3,844 views
The hypotenuse of a right triangle has one end at the origin and one end on the curve y+x^2e^(-3x), with x > or = 0. One of the
1. 3 answers
2. asked by miley
3. 3,769 views
Two ships leave a harbor together traveling on courses that have an angle of 124° between them. If they each travel 511 miles,
1. 1 answer
2. asked by ana
3. 3,562 views
Calcium carbonate reacts with phosphoric acid to produce calcium phosphate, carbon dioxide, and water.3 CaCO3(s) + 2 H3PO4(aq)
1. 1 answer
2. asked by carson
3. 3,379 views
Would someone please double check my answers.The retail cost of a computer is 32% more than its wholesale cost? which statement
1. 5 answers
2. asked by Amy
3. 3,251 views
Which diffuses faster, the bad smell from a cat-pan due to ammonia or an expensive French perfume with an average molecular
1. 4 answers
2. asked by Jessica
3. 2,751 views
When inflation causes the price of an item to increase the new cost C and the original cost c are related by the formula
1. 1 answer
2. asked by Taylor
3. 2,660 views
An object moves along the x axis, subject to the potential energy shown in Figure 8-24. The object has a mass of 1.8 kg, and
1. 2 answers
2. asked by Kelly
3. 2,593 views
I'm doing questions on the poem called "You are reading this too fast", by Ken Norris, and I need help with some of the
1. 2 answers
2. asked by Sara
3. 2,563 views
What is the pH of the solution obtained by mixing 30.00mL OF 0.250M HCL AND 30.00mL OF 0.125M NaOH?
1. 1 answer
2. asked by ami
3. 2,477 views
The radius of each wheel of a car is 16 inches. At how many revolutions per minute should a spin balancer be set to balance the
1. 2 answers
2. asked by Alex
3. 2,413 views
1.According to the law of demand, when the price of an item goes up, the quantity demandeda. stays at the same level. c. falls.
1. 5 answers
2. asked by Candace
3. 2,378 views
2NH3+H2SO4---> (NH4)2SO4Calculate the mass of ammonia required to produce 125g of ammonium sulfate.|:
1. 2 answers
2. asked by Tanya
3. 2,346 views
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of –0.40 rad/s^2 has an angular velocity of
1. 1 answer
2. asked by Jared
3. 2,294 views
To measure the height of a building,two sightings are taken a distance of 50 feet apart. Of the first angle of elevation is 40
1. 2 answers
2. asked by Alex
3. 2,024 views
What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 216.2 g water to give a solution with a freezing point of
1. 1 answer
2. asked by Stephany
3. 1,989 views
a) Water drops, sitting on your skin after a dip in a swimming pool, evaporate. Identify the system and its surroundings for the
1. 1 answer
2. asked by Molly :)
3. 1,928 views
An object moves along the x axis, subject to the potential energy shown in Figure 8-24. The object has a mass of 1.8 kg, and
1. 1 answer
2. asked by Kelly
3. 1,876 views
A 60.0 kg person bends his knees and thenjumps straight up. After his feet leave the floor, his motion is unaffected by air
1. 1 answer
2. asked by phys
3. 1,871 views
A vehicle moves along a straight path with a speed of 4m/s. A searchlight is located on the ground 20m from the path and is kept
1. 5 answers
2. asked by sh
3. 1,820 views
A pendulum swings through an angle of 20 degrees each second. If the pendulum is 40 inches long, how far does its tip move each
1. 1 answer
2. asked by Alex
3. 1,798 views
In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 695 N/m. Initially, the spring is
1. 2 answers
2. asked by Holy Grail
3. 1,757 views
1. The principle that states that the more you have of something, the less satisfaction you will get from anadditional unit is
1. 3 answers
2. asked by Candace
3. 1,748 views
Ka for hypochlorous acid,HCLO, IS 3.0*10^-8. Calculate the pH after 10.0,20.0,30.0, and 40.0mL OF 0.100M NaOH have been added to
1. 2 answers
2. asked by AMI
3. 1,717 views
Hello!!A survey indicates that for each trip to the supermarket, a shopper spends an average of 45 minutes with a standard
1. 1 answer
2. asked by Anonymous
3. 1,707 views
The label on a candy bar says 470 Calories.Assuming a typical efficiency for energy use by the body, if a 74 kg person were to
1. 2 answers
2. asked by ziddi
3. 1,638 views
How do you calculate delta[S2O8 2-] in iodine clock reaction?
1. 1 answer
2. asked by vickie
3. 1,631 views
In a laboratory setting, how would you determine if a compound was a hydrate?
1. 2 answers
2. asked by Astrid
3. 1,602 views
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x = -2.0 cm. A second, parallel wire
1. 2 answers
2. asked by OLLIJURT
3. 1,592 views
what is nitrolim and is uses?
1. 3 answers
2. asked by prosenjit
3. 1,556 views
A stained glass window is composed of 20 triangular sections, each with sides 6, 8, and 7 in. Find the total area of the window
1. 1 answer
2. asked by pepe
3. 1,552 views
How to eat a poemDon't be polite. Bite in. Pick it up with your fingers and lick the juice that may run down your chin. It is
1. 1 answer
2. asked by Sara
3. 1,485 views
Please double check me.Brett saved $670 at the bank. he want to save $3800 for a trip to disneyland. what percent of his goal
1. 4 answers
2. asked by Amy
3. 1,448 views
1. calculate H+ ion concentrates in 0.10 m acetic acid solutions. Given that dissociation constant of acetic acid in water is
1. 1 answer
2. asked by pramod
3. 1,407 views
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7
1. 2 answers
2. asked by Ab
3. 1,388 views
Bill deposited $520 in a savings account that pays pays 6% simply interest per year. How much will he earn in 1 year?
1. 2 answers
2. asked by Keisha
3. 1,382 views
a rain drop falls from rest in an atmosphere saturated with water vapour. As it falls, water vapour condenses on drop at rate of
1. 1 answer
2. asked by pramod
3. 1,333 views
A shot-putter moves his arm and the 7.0 kg shot through a distance of 1 meters iving the shot a velocity of 10 m/s from rest.
1. 1 answer
2. asked by Omari
3. 1,310 views
Why do the metallic elements of a given period (horizontal row) typically have much lower ionization energies than do the
1. 1 answer
2. asked by student
3. 1,308 views
32. Which of the following is an example of the Associative Property of addition?a. 4 + (3 + 1) = (4 + 3) + 1 b. 4(3 + 1) = 3(4
1. 5 answers
2. asked by y912f
3. 1,255 views
Figure 8-33 shows a 1.50 kg block at rest on a ramp of height h. When the block is released, it slides without friction to the
1. 0 answers
2. asked by Holy Grail
3. 1,249 views
Find the maximum possible coefficient of performance for a heat pump used to heat a house in a northerly climate in winter. The
1. 1 answer
2. asked by Naso
3. 1,223 views
1) each side of a square is increasing at a rate of 6cm/s. At what rate is the area of the square is 16 cm^2?2)the radius of a
1. 0 answers
2. asked by alissa
3. 1,215 views
At what temperature do hydrogen molecules have the same rms speed as nitrogen molecules at 90 degree C?
1. 2 answers
2. asked by ziddi
3. 1,213 views
NET INCOME BEFORE TAXES OF $200,000 AND SALES OF $2,000,000. IF IT IS IN THE 50% TAX BRACKET, WHAT WOULD IT'S AFTER TAX PROFIT
1. 0 answers
2. asked by TARA
3. 1,206 views
Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide.Sb2S3(s) + 3 Fe(s) 2
1. 5 answers
2. asked by clara
3. 1,206 views
The sides of a parallelogram are 15 ft and 17 ft. One angle is 40° while another angle is 140°. Find the lengths of the
1. 2 answers
2. asked by ana
3. 1,204 views
How many grams of NH3, are required to produce 5.23 g HF?
1. 2 answers
2. asked by kristen
3. 1,202 views
A sphere of radius r and mass m has a linear velocity v0 directed to the left and no angular velocity as it is placed on a belt
1. 0 answers
2. asked by pramod
3. 1,164 views
How do I solve this?The usual partial pressure of oxygen that people get at sea level is .20 atm, that is, a fifth of the usual
1. 1 answer
2. asked by Avalon
3. 1,157 views
A random sample of 40 men drank an average of 20 cups of coffee per week during examination final,with the population standard
1. 2 answers
2. asked by cindy
3. 1,154 views
My Moral Reasoning assignment says to select one of the age groups I chose in week 6: Middle Childhood (6-10).Then says: Decide
1. 3 answers
2. asked by Lola
3. 1,152 views
Consider the following information:Season Sales(units) Summer Autumn Winter Spring Christmas 98 114 123 105 Holidays 110 110 110
1. 3 answers
2. asked by JUDY
3. 1,150 views
1. The patient had a cystectomy. What does the root of this word mean?A. Kidney B. Bladder C. Sac D. Meatus Answer: C 2. When
1. 0 answers
2. asked by Brenda
3. 1,150 views
Determine the p–value associated with the values of the standardized test statistic z = 1.05 for one-tailtest. (1) 0.3531 (2)
1. 1 answer
2. asked by SAM
3. 1,136 views
How do I set this up? What formula do I use? Will you please help me?How many liters of ammonia at STP are produced when 10 g of
1. 1 answer
2. asked by Jessica
3. 1,117 views
27.Rice is what you’ll probably end up with these days if your local McDonald’s is in Indonesia. With the collapse of the
1. 2 answers
2. asked by Candace
3. 1,105 views
Organic chemists state that the rate of a chemical reaction can be doubled by increasing the reaction temperature by ten degrees
1. 1 answer
2. asked by Celia
3. 1,102 views
julie arrived 20 minutes before the race began. she started right on time. it took her 24 minutes to finish the6-kilometer race.
1. 1 answer
2. asked by PAULA
3. 1,092 views
A 5-mile cab ride costs $9.30. A 11-mile cab ride costs $17.70. Find a linear equation that models cost c as a function of
1. 1 answer
2. asked by Cynthia
3. 1,068 views
A block of wood of mass 0.91 kg is initially at rest. A bullet of mass 0.047 kg traveling at 104.7 m/s strikes the block and
1. 3 answers
2. asked by Max
3. 1,068 views
The air pressure variations in a sound wave cause the eardrum to vibrate. Find the maximum velocity and acceleration of the
1. 2 answers
2. asked by mike
3. 1,067 views
Suppose you have a friend named Ed. He and his four friends are having ice cream. There are only three flavors available at the
1. 1 answer
2. asked by dan
3. 1,055 views
what would hospitals administrators use to make decisions about inpatient services
1. 0 answers
2. asked by pat
3. 1,050 views
How many moles of carbon are needed to react with 5.01 mol SO2?How many moles of carbon monoxide form at the same time that
1. 2 answers
2. asked by libby
3. 1,048 views
The electricity in your house is alternating current because the current varies sinusoidally with time. The frequency of
1. 0 answers
2. asked by Kevin
3. 1,047 views
1. Classify the following number as rational or irrational: 4.1rational? 2. True or False: The Associative Property allows you
1. 2 answers
2. asked by mysterychicken
3. 1,038 views
The hypotenuse of a right triangle has one end at the origin and one end on the curve y+x^2e^(-3x), with x > or = 0. One of the
1. 0 answers
2. asked by miley
3. 1,025 views
A statistics practitioner wishes to test the following hypothesis: H0 : ì = 600 against H1 : ì < 600A sample of 50
1. 2 answers
2. asked by joseph
3. 1,019 views
collected for use in the approval process required by theU.S. Food and Drug Administration (FDA). Some participants were given a
1. 1 answer
2. asked by Hannah
3. 1,001 views
The molarity of Sr2+ in a saturated solution of SrSO4 was determined to be 0.000500 M. Calculate the solubility product constant
1. 1 answer
2. asked by Angel
3. 994 views
What happens when an insulator is wired in parallel with the bulb?is the swich open or closed?
1. 1 answer
2. asked by Javier
3. 987 views
to increase therate of solvation of carbon dioxide, what must a scientist consider? should they decrease the temp and increase
1. 0 answers
2. asked by debby
3. 977 views
HI, I am having trouble working this problem. This is the question: Two measurements are given. Find the absolute difference and
1. 3 answers
2. asked by Amy
3. 975 views
How many moles of chlorine are needed to react with 3.30 moles of aluminum?
1. 1 answer
2. asked by libby
3. 969 views
The label on a candy bar says 470 Calories.Assuming a typical efficiency for energy use by the body, if a 74 person were to use
1. 1 answer
2. asked by Naso
3. 968 views
a closed box has a fixed surface area A and a suqare base wide side Xa) find the formula for its volume, v, as a function x b)
1. 1 answer
2. asked by miley
3. 964 views
How much energy is needed to melt 0.225 kg of lead so that it can be used to make a lead sinker for fishing? The sample has an
1. 0 answers
2. asked by Kim
3. 954 views
find the volume of the solid whose base is bounded by the graphs of y= x+1 and y= (x^2)+1, with the indicated cross sections
1. 1 answer
2. asked by john
3. 946 views
which statement is not a requirement for anadequate definition?A)***a definition should not be expressed in the negative. b) a
1. 3 answers
2. asked by henry
3. 946 views
Calculate the PH OF A SOLUTION prepared by mixing 15.0mL OF 0.50 M OF NaOH AND 30.0mL OF 0.50 M BENZOIC ACID SOLUTION?(
1. 1 answer
2. asked by ami
3. 932 views
Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 3.0 hr at a speed of
1. 1 answer
2. asked by ziddi
3. 921 views
Calculate the solubility in grams per 100 ml of water of potassium sulfate if 1.20 g of the solid dissolves in 10.5 mL of water
1. 1 answer
2. asked by S.S
3. 915 views
28. Use the Distributive Property to simplify x(4x^2 + x + 4)Is it 4x^3 + x^2 + 4x? 42. To which set of numbers does 0 not
1. 2 answers
2. asked by mysterychicken
3. 908 views
Your umpteen posts been removed.Once you write up <b>YOUR THOUGHTS</b>, please re-post, and someone here will be happy to
1. 1 answer
2. asked by Writeacher
3. 894 views
There are 20 red yellow and green tiles in a bag. 1/2 of the tiles are not yellow. 1/5 of the tiles are red. What is the
1. 4 answers
2. asked by Ali
3. 880 views
In a sample of 500 college students fifty percent of all college students attend schools within 50 miles oftheir homes. The
1. 1 answer
2. asked by sam
3. 868 views
A weight attached to a spring is pulled down 4 inches below the equilibrium position. Assuming that the frequency of the system
1. 0 answers
2. asked by elvis
3. 866 views
classify each reaction and balance the equation Al(OH)3--> Al2O3 + H2O
1. 1 answer
2. asked by taylor
3. 862 views
A 3-mile cab ride cost $3.00. A 6-mile cab ride cost $4.80. Find a linear equation that models cost c as a function of distance
1. 1 answer
2. asked by Cynthia
3. 836 views
A bakery stated that the average number of breads sold daily is 3000. An employee thinks that the actualvalue might differ from
1. 0 answers
2. asked by joseph
3. 817 views
How do I solve this?The usual partial pressure of oxygen that people get at sea level is .20 atm, that is, a fifth of the usual
1. 3 answers
2. asked by Avalon
3. 796 views
what should you see when 2-butanol is treated with NaI-I2?if you pour ethylene glycol into water it mixes in all oroprtions. but
1. 2 answers
2. asked by karlene
3. 780 views
Rank the elements B, Al, Na, Mg from largest to smallest atomic radius.Would it be: Al, Mg, Na, B?
1. 1 answer
2. asked by Meg
3. 768 views
Please help me. I can't seem to get the answer of 165 degrees.Find the angle ϴ between the vectors. u=3i-3j, v=-2i+2√3j
1. 1 answer
2. asked by Gary
3. 760 views

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