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2012
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Questions Asked on March 29, 2012

A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a
1. 1 answer
2. asked by greg
3. 10,459 views
1. Let R be the region bounded by the x-axis, the graph of y=sqr(x) , and the line x=4 .a. Find the area of the region R. b.
1. 2 answers
2. asked by naseba
3. 10,434 views
what problem did the dumb gangster have when the boss told him to blow up a car?
1. 29 answers
2. asked by matt
3. 8,491 views
a boy weighing 350N runs up a flight of stairs consisting of 20 steps each 10cm high in 10 seconds. What is his power? show your
1. 11 answers
2. asked by marv
3. 7,787 views
A force of magnitude Fx acting in the x-direction on a 2.50-kg particle varies in time as shown in the figure below.(a) Find the
1. 1 answer
2. asked by sally
3. 7,165 views
Can someone check my work PLEASE..Which of the following is not a strategy for revising your paper? Check for redundant
1. 15 answers
2. asked by kevin
3. 7,012 views
A coin of 5.30 gram is placed 12.0 cm from the center of a turntable. The coin has static and kinetic coefficients of friction
1. 1 answer
2. asked by jaeny
3. 6,134 views
If you weigh 650 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun
1. 1 answer
2. asked by Kristina
3. 5,923 views
it cost $350 to carpet an 8ft. by 10 ft room. at this rate, how many dollars would it cost to put the same carpeting in a 24 ft.
1. 3 answers
2. asked by cate
3. 5,800 views
A communications satellite transmits a radio wave at a frequency of 5 • 109 Hz. What is the signal’s wavelength? Assume the
1. 7 answers
2. asked by LeXi;)
3. 5,335 views
The formula d=1.35�ãh models the distance d in miles from the horizon where h is the distance in feet from a person�fs eyes
1. 1 answer
2. asked by ben
3. 5,114 views
Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10−2 M. The
1. 2 answers
2. asked by Gabe
3. 5,082 views
The position of a particle moving in a straight line is given by s(t) = (e^(-t))(cos(5t)) for t>0, where t is in seconds. If the
1. 1 answer
2. asked by Anonymous
3. 4,720 views
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate.Ho
1. 2 answers
2. asked by Jematormal91
3. 3,864 views
A Solution contains a mixture of Cl- and Br- ions. Can both be positively identified? Briefly explain. Write appropriate
1. 4 answers
2. asked by Anonymous
3. 3,440 views
Calculate the pH of a buffer solution obtained by dissolving 16.0 g of KH2PO4(s) and 27.0 g of Na2HPO4(s) in water and then
1. 2 answers
2. asked by Jematormal91
3. 3,393 views
An unknown compound contains only carbon, hydrogen, and oxygen (C?H?O?). Combustion of 6.50 of this compound produced 9.53 g of
1. 3 answers
2. asked by Dylan
3. 3,050 views
A 25 ft ladder is leaning against a vertical wall. At what rate (with respect to time) is the angle theta between the ground and
1. 1 answer
2. asked by Anonymous
3. 3,010 views
In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the
1. 4 answers
2. asked by BB
3. 2,988 views
A recent survey found that 72% of all adults over 50 wear glasses for driving. In a random sample of 100 adults over 50, what is
1. 8 answers
2. asked by Sheila
3. 2,911 views
Calculate the vapor pressure lowering of water when 5.67 g of glucose, C6H12O6, is dissolved in 25.2 g of water at 25 ºC. The
1. 2 answers
2. asked by MJ
3. 2,908 views
In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle
1. 1 answer
2. asked by M
3. 2,896 views
Suppose there are 400 students in your school class. What class rank is the 20th percentile?
1. 2 answers
2. asked by Bridget
3. 2,601 views
For the reactionN2O4(g) ---> 2NO2(g) ,which of the following disturbances will cause an increase in NO2(g) concentration? 1. a
1. 2 answers
2. asked by please help
3. 2,521 views
A study of 35 professors showed that the average time they spent creating test questions was 13.5 minutes per question. The
1. 2 answers
2. asked by Holly
3. 2,487 views
Which member of Fred Ferd's Family thinks he's a pen?What did the boy tree say to the girl tree? Why did the Plum divorce the
1. 4 answers
2. asked by Brittney Hoang
3. 2,482 views
The distance between two cities on a map is 7cm. The actual distance between two cities is 350 km. What is the scale used on
1. 1 answer
2. asked by Raymond
3. 2,437 views
A 0.2 kg sponge is dropped from rest , pulled down by gravity. How fast will it be traveling in 6.0s , if a 0.5 N force of air
1. 2 answers
2. asked by Isabella
3. 2,433 views
On the scale drawing of a floor plan 2 inches= 5 ft. A room is 7 inches long on the scale drawing. Find the actual length of the
1. 1 answer
2. asked by Cassie
3. 2,339 views
Car rental agency A charges $50 per day plus 10 cents per mile driven. Agency B charges $20 per day plus 30 cents per mile
1. 3 answers
2. asked by Anonymous
3. 2,286 views
In which of the following sets of points is y a function of x? A= {(2, 2), (4, 6), (5, 3), (5, 1)} B= {(2, 2), (3, 4), (4, 4),
1. 1 answer
2. asked by Keyaria
3. 2,279 views
A stack of 10 quarters is a cylinder. If the diameter of a single quarter is 2.2 cm and the approximate height is 0.17 cm, what
1. 3 answers
2. asked by Anonymous
3. 2,162 views
I keep getting wrong answers for this question.Determine the pH of an HF solution of each of the following concentrations. a)
1. 4 answers
2. asked by maura
3. 2,104 views
On a perfect fall day, you are hovering at low altitude in a hot-air balloon, accelerated neither upward nor downward. The total
1. 2 answers
2. asked by Jim
3. 2,074 views
Which of the following oxides is the most acidic?A. Al2O3 B. P4O10 C. SO3 D. MgO E. SiO2
1. 1 answer
2. asked by M
3. 2,010 views
If 6.50 g of the unknown compound contained 0.217 mol of C and 0.433 of H, how many moles of oxygen,O, were in the sample?
1. 2 answers
2. asked by Collin
3. 1,993 views
A small circular object with mass m and radius r has a moment of inertia given byI = cmr2. The object rolls without slipping
1. 2 answers
2. asked by Adam
3. 1,937 views
a hammer falls off a rooftop and strikes the ground with a certain kinetic energy. if it fell from a roof twice as tall, how
1. 6 answers
2. asked by tim
3. 1,922 views
Krispy Kritters Cereal used to come in a box with a volume of 2,850 cm. However, The Krispy Kritters Co designed a new larger
1. 2 answers
2. asked by Anonymous
3. 1,896 views
Each of the four wheels of a car push on the road with a force of 4.0*10^3 N [down]. The driving force on the car is 8.0*10^3 N
1. 1 answer
2. asked by Maggie
3. 1,888 views
If a plant manufacturing carpet backing has a cylindrical tank that is 3 meters high and is 6 meters in diameter. What is the
1. 4 answers
2. asked by Anonymous
3. 1,861 views
Calculate the mass KHC8H4O4 (molar mass= 204.44 g/mol) that reacts with 15 mL of the NaOH solution. Express this mass KHC8H4O4
1. 1 answer
2. asked by Amy
3. 1,813 views
The normal melting point of H2O is 273.15 K, and deltaH fusion is 6010 J/mol. Calculate the change in the normal melting point
1. 5 answers
2. asked by Jason
3. 1,695 views
A soccer player applies a force of 51.5 N to a soccer ball while kicking it. If the ball has a mass of 0.46 kg, what is the
1. 2 answers
2. asked by Tityana
3. 1,655 views
a spring (k = 2.3 n/m is attached to a object of mass = 10 kg if the object is hung from the ceiling how much would the spring
1. 1 answer
2. asked by kai mera
3. 1,521 views
Revised and wanting to know if it's ready for submittance:BROADWORTH GENERAL HOSPITAL Interoffice Memo TO: Miriam Hopkins,
1. 2 answers
2. asked by Shawna
3. 1,486 views
The anti-federalist were against ratification of the constitution mostly because?A. they were anarchists B. their experiences
1. 2 answers
2. asked by MM
3. 1,445 views
Nitrogen Dioxide , a pollutant in the atmosphere, can combine with water to form nitric acid. One of the possible reactions is
1. 1 answer
2. asked by SANDY
3. 1,391 views
Samantha is going on a vacation for the summer and is trying to choose between two different plans. The first plan costs 450$
1. 1 answer
2. asked by Dr. David
3. 1,390 views
What do you call an angle more than 90 degrees and less than 180 degrees?Obtuse How many equal sides does an icosahedron have?
1. 2 answers
2. asked by Rezu
3. 1,376 views
A concave makeup mirror is designed so thata person 25.3 cm in front of it sees an upright image at a distance of 54.0 cm behind
1. 2 answers
2. asked by Angel
3. 1,364 views
You extract the iron from a tablet and dilute that to 600.0 ml in a volumetric flask. You transfer 0.600 ml of this solution to
1. 1 answer
2. asked by leigh
3. 1,362 views
the primary visible emissions from mercury are 404.7 nm and 435.8 nm. Calculate the frequencies for these emissions. Calculate
1. 1 answer
2. asked by danielle
3. 1,298 views
What happens to the concentration of HI(g) when the total pressure on the equilibrium reaction2HCl(g) + I2(s) <--> 2HI(g) +
1. 7 answers
2. asked by please help
3. 1,296 views
There are parentheses inside parenthesis.the operations inside the_pair are performed first.outer,inner,any,all of the above
1. 3 answers
2. asked by Femi
3. 1,267 views
If a football field's length is 120 yds. and its width is 53 1/3 yards and a soccer field's lenght is 130 yds and its width is
1. 4 answers
2. asked by Samantha
3. 1,245 views
For an experiment on the effect of a buffer solution, I need to calculate the expected pH of the buffer.I know that I have to
1. 1 answer
2. asked by Hannah
3. 1,230 views
a person is standing 12m away from a street light that is 9m tall. How tall is he if his shadow is 3m long?
1. 2 answers
2. asked by sarah
3. 1,193 views
An aqueous solution is 0.257 m NaOH. What are the boiling point and freezing point of this solution?
1. 1 answer
2. asked by MJ
3. 1,189 views
A non toxic floor wax can be made from lemon juice and linseed oil.The amount of oil should be 2 times the amount of lemon
1. 1 answer
2. asked by AMBER
3. 1,186 views
Which part(s) of the reaction2O3(g) <---> 3O2(g) will be favored by an increase in the total pressure (resulting in
1. 1 answer
2. asked by please help
3. 1,179 views
Tristan is having a birthday party. He doesn’t want anyone less than 10 years old to come to his party. If y equals age in
1. 1 answer
2. asked by math
3. 1,178 views
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a 0.5 kg object. What is the net force on
1. 1 answer
2. asked by Mary
3. 1,170 views
What are the temperatures for freezing water and boiling water on the Kelvin temperature scale?a)273K for freezing water; 373K
1. 1 answer
2. asked by Kristie
3. 1,167 views
A hardware supplier manufactures three kinds of clamps, types A, B, and C. Productionrestrictions force it to make 10 more type
1. 1 answer
2. asked by AMBER
3. 1,157 views
a bag of 25 marbles contains 8 red marbles.if one marble is picked from the bag,what is the probability that it is red in
1. 1 answer
2. asked by miki
3. 1,151 views
the pentagons are similar. the area of the smaller pentagon is 30m squared. what is the area of the larger pentagon in m
1. 1 answer
2. asked by t
3. 1,147 views
A mountain-climber friend with a mass of 82 kg ponders the idea of attaching a helium-filled balloon to himself to effectively
1. 0 answers
2. asked by Jim
3. 1,139 views
I don't know how to do this the speed of train A is 18mph slower than the speed of train B train A travels 190 miles in the same
1. 1 answer
2. asked by karon
3. 1,128 views
An object 3.28 cm tall is placed 10.5 cm in front of a mirror, which creates an upright image rant is 6.43 cm in height.A. What
1. 2 answers
2. asked by imel
3. 1,127 views
Toluene, C6H5CH3, is a liquid similar to benzene, C6H6. It is the starting material for other substances, including
1. 1 answer
2. asked by MJ
3. 1,119 views
What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium-vapor devices?Thank
1. 4 answers
2. asked by jEnN
3. 1,108 views
I realized I sent you the wrong sentences. Can you please have a look at them?1) Our history teacher has included a new email
1. 1 answer
2. asked by Matthew
3. 1,100 views
Calculate the partial pressure of monatomic hydrogen in hydrogen gas at 2000 K and 1 atm pressure.Given: (i) For ½ H2 -> H,
1. 1 answer
2. asked by John
3. 1,099 views
You have been working for the XYZ Computer Corporation as an entry-level software engineering since you graduated from college
1. 1 answer
2. asked by Enid
3. 1,098 views
A lab assistant wants to make FIVE LITERS of 31.2% acid solution. If solutions of 40% and 18% are in stock, how many liters of
1. 1 answer
2. asked by amy
3. 1,087 views
The reaction of quicklime (CaO) with sulfur dioxide (SO2) is an important reaction for reducing SO2 emissions from coal-fired
1. 1 answer
2. asked by M
3. 1,086 views
How much more acetic acid (pKa = 4.76) than acetate should be in solution to maintain a pH of 4.00?
1. 3 answers
2. asked by Jematormal91
3. 1,081 views
A 500-mL aqueous solution of NaCl was electrolyzed for 15.0 minutes, producing Cl2 gas at the anode. If the pH of the final
1. 1 answer
2. asked by M
3. 1,079 views
Aluminum sulfate and calcium acetate = ?
1. 0 answers
2. asked by Alexis
3. 1,065 views
If Pete colored 1/2 of a poster and Rebecca colored 1/3 of the poster. What fraction still needs to be colored?
1. 2 answers
2. asked by Robert
3. 1,054 views
A stock solution is prepared by adding 20mL of 0.2M Na3PO4 to enough water to make 80mL. What is the Na+ concentration of 20mL
1. 2 answers
2. asked by Kev
3. 1,045 views
John has $1800 hidden under his mattress and $250 in the cookie jar.He decides to take his money to a bank, where he divides it
1. 0 answers
2. asked by Anonymous
3. 1,028 views
In 1995, Japan had an earthquake of magnitude 7.2. What is the magnitude of an earthquake that is twice as intense?
1. 2 answers
2. asked by Anonymous
3. 1,019 views
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a 0.5 kg object. What is the net force on
1. 0 answers
2. asked by Mary
3. 1,016 views
The Abuse Ends Now by: Kathy AI wasn't enough So he became rough I'm just not that tough As he was handcuffed I saw his face I
1. 2 answers
2. asked by i♥zee
3. 1,016 views
C(s) + H20(g)↔ CO(s) + H2(s)the equilibrium constant for this reaction is 4.251 x 10^-2 at 800 K. if the equilibrium
1. 1 answer
2. asked by Someone
3. 1,006 views
If $8,500 is deposited in a compound interest account paying 3.9% interest annually, how much will be in the account after 12
1. 1 answer
2. asked by Anonymous
3. 996 views
If you look at yourself in a shiny Christmas tree ball with a diameter of 9.0 cm when your face is 38.0 cm away from it, where
1. 0 answers
2. asked by ANNA
3. 980 views
A 515 cm3(cm cubed) block of aluminum (D = 2.7 g/cm3) is lowered carefully into a completely full beaker of water. What is the
1. 2 answers
2. asked by Alaine'
3. 979 views
A second-order reaction has a rate constant of 1.65 M–1 s–1. If the initial reactant concentration is 1.0 M, calculate the
1. 2 answers
2. asked by Maya
3. 958 views
A 10 charge sits at a point in space where the magnitude of the electric field is 1900 .What will the magnitude of the field be
1. 1 answer
2. asked by Frustrated
3. 948 views
Suppose a circle has a radius of 4.5 inches. If you double the radius of the circle, does the area of the circle double as well?
1. 1 answer
2. asked by cheyanne marie
3. 933 views
40% of the 300-member sophomore class is in the band. The percussion section is made up of 5% of these band members. How many of
1. 1 answer
2. asked by Anonymous
3. 929 views
A 67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.66 m/s upward. (Take upward as positive
1. 1 answer
2. asked by sally
3. 922 views
f equilateral triangle JKL is cut by three lines as shown above to form four equilateral triangles of equal area, what is the
1. 1 answer
2. asked by Anonymous
3. 921 views
three moles of phosphoric acid contains how many moles of oxygen atoms
1. 3 answers
2. asked by lisa
3. 917 views
Why was South Carolina placed under military control? I think it is because it refused to ratify the 13th Amendment, but I am
1. 0 answers
2. asked by Samantha
3. 908 views
Why might an increase of the minimum wage in the United States impact unemployment rates?
1. 1 answer
2. asked by John
3. 901 views
Lithium hydroxide is used in the space program to remove carbon dioxide (frin respiration) in spacecraft. Specifically, lithium
1. 1 answer
2. asked by Ambra
3. 895 views

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