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2011
February

Questions Asked on February 28, 2011

A shotputter accelerates a 7.3kg shot from rest to 14m/s. If this motion takes 2.0s what average power was developed?
1. 2 answers
2. asked by maria
3. 7,339 views
A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl (aq) . When the liberated H2 (g) is
1. 8 answers
2. asked by Jake
3. 7,246 views
what is the 10th term in this arithemetic sequence of 2,9,16,23,30?
1. 2 answers
2. asked by lesly
3. 4,616 views
Physics Question Please Help?A wire, 20.0 m long, moves at 4.0 m/s perpendicularly through a magnetic field. An EMF of 40V is
1. 5 answers
2. asked by Crystal
3. 3,862 views
As a technician in a large pharmaceutical research firm, you need to produce 400. mL of 1.00 M potassium phosphate solution of
1. 1 answer
2. asked by Anonymous
3. 3,759 views
A 1200 kg car rolling on a horizontal surface has spped v= 65 km/h when it strikes a horizontal coiled spring and is brought to
1. 2 answers
2. asked by Lowell
3. 3,729 views
A hair dryer uses 10A at 120V. It is used with a transformer in England, where the voltage is 240V. A. What should be the ratio
1. 2 answers
2. asked by Crystal
3. 3,592 views
Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the
1. 5 answers
2. asked by Hannah
3. 3,493 views
Susan is taking Western Civilization this semester on a pass/fail basis. The department teaching the course has a history of
1. 2 answers
2. asked by Anonymous
3. 3,424 views
Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx-3 and X^3-3mx^2+2nx+4 are both divisible by x-2.I am so
1. 4 answers
2. asked by rani
3. 3,199 views
a. what is the pKb of NO2-b. what is the pKa of the hydrazinium ion?
1. 2 answers
2. asked by Anonymous
3. 3,120 views
Write an expression for the sum of the squares of two consecutive integers. (Use x for the integer.)1 Simplify that expression.
1. 3 answers
2. asked by jannette
3. 2,865 views
a skateboarder is skating over a circular bump. she is at the top of the bump and is moving with a speed of 5m/s.Is the normal
1. 1 answer
2. asked by tae
3. 2,831 views
The volume of an adult's stomach ranges from about 50 mL when empty to 1 L when full.If its volume is 500 mL and its contents
1. 2 answers
2. asked by Anonymous
3. 2,701 views
Of each pair of solids, which one has the higher melting point?a) HCl and KCl b) Cu and Kr. Can you please explain? How do you
1. 1 answer
2. asked by Rebekah
3. 2,612 views
Suzanne wants to put a fence around her square garden. If the garden covers an area of 64 ft2, how many feet of fencing does she
1. 8 answers
2. asked by Sue
3. 2,459 views
Briefly explain Anne’s relationship with her parents. How is her relationship with her father different from her relationship
1. 5 answers
2. asked by Roxy
3. 2,351 views
Please check my answers.1. Using the equations, IO3- +5I- + 6H+ -> 3I2 + 3H2O C6H8O6 + I2 -> C6H6O6 + 2I- + 2H+ how many
1. 2 answers
2. asked by Sara
3. 2,337 views
Adams Enterprises’ noncallable bonds currently sell for $1,120. They have a 15- year maturity, an annual coupon of $85, and a
1. 4 answers
2. asked by david
3. 2,302 views
Two parallel lines are cut by a transversal. Angles A and B are adjacent exterior angles. Angle A measures 87 degrees. What does
1. 3 answers
2. asked by Barbie
3. 2,229 views
When a 4.00g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 2.908 kJ x K^-1, the
1. 3 answers
2. asked by Jordan
3. 2,183 views
Of HOOH(s) and TiO2(s) which one has the higher melting point?
1. 2 answers
2. asked by Rebekah
3. 2,177 views
1.The winner of the essay contest was (she, her).2.(Who, Whom) did you baby-sit for yesterday? 3.Next year, (we, us) students
1. 5 answers
2. asked by Hayley
3. 2,055 views
If I go into an ice cream parlor, and I have the choice of having one of 10 different flavors , with one of 5 different toppings
1. 1 answer
2. asked by Anonymous
3. 1,965 views
"Find the directional derivative fu(1,2) for the function f with u = (3i-4j)/5 for f(x,y)= x^(2) - y^(2)."Thank you!
1. 1 answer
2. asked by Anonymous
3. 1,880 views
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown
1. 1 answer
2. asked by Angela here again
3. 1,841 views
How many milliliters of concentrated hydrochloric acid solution (36.0% HCl by mass, density = 1.18 g/mL) are required to produce
1. 3 answers
2. asked by Anonymous
3. 1,734 views
Physics question on identify the reaction?I am having trouble with the question a, b, and c in this physics problem: One or more
1. 1 answer
2. asked by Lin
3. 1,734 views
Find the equation of the circle where the center is on the line 8x + 5y - 8 =0 and passing through point (2,1) and point (3,5)
1. 2 answers
2. asked by Mk
3. 1,711 views
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid
1. 2 answers
2. asked by shaknocka
3. 1,692 views
Let p represent the statement, "Jim plays football", and let q represent "Michael plays basketball". Convert the compound
1. 2 answers
2. asked by Shan
3. 1,663 views
As you know, Anne frequently refers to how much she appreciates and enjoys nature. Why is nature so important to Anne? What does
1. 3 answers
2. asked by Roxy
3. 1,653 views
The value of a certain two-digit number is eight times he sum of its digits. if the digits of the number are reversed the result
1. 2 answers
2. asked by Bri
3. 1,592 views
multiple selectThese were the effects of glacial movement on the Nordic nations. 1) thousands of lakes 2) fertile river valleys
1. 6 answers
2. asked by anonymous
3. 1,585 views
Degree of unsaturation why is it 5?C20H32CIN do i ignore the second C? because i did 21(2)+2=44 44-32+1-1 / 2 = 6 but i get it
1. 2 answers
2. asked by ben
3. 1,542 views
How do I find the volume of 6M stock solution of acetic acid needed to make a 250 mL buffer at a pH 4.7? pka is 4.74
1. 6 answers
2. asked by Jenny
3. 1,511 views
** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the
1. 1 answer
2. asked by Angela here again
3. 1,478 views
in a scale drawing of a school's floor plan, 6 inches represents 100 feet. If the distance from one end of the main hallway to
1. 1 answer
2. asked by shannon
3. 1,472 views
to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same
1. 2 answers
2. asked by shannon
3. 1,470 views
"Use difference quotients with delta(x)=0.1 and delta(y)=0.1 to estimate fx(1,3) and fy(1,3) where f(x,y)=e^(-x)sin(y)."I don't
1. 1 answer
2. asked by Brittany
3. 1,445 views
While watching ocean waves at the dock of the bay, Otis notices that 8 waves pass beneath him in 30 seconds. He also notices
1. 2 answers
2. asked by haylee
3. 1,443 views
A slingshot fires a pebble from the top of a building at a speed of 16.0 m/s. The building is 32.0 m tall. Ignoring air
1. 0 answers
2. asked by shaknocka
3. 1,425 views
The Chlorination of vinyl chloride, C2H3Cl +Cl2-->C2H3Cl3, is believed to proceed by the following mechanism:Cl2 --(k1)--> 2Cl*
1. 2 answers
2. asked by Sam
3. 1,424 views
Assuming gasoline is 100% isooctane, with a density of 0.692g/mL, what mass of carbon dioxide is produced by the combustion of
1. 3 answers
2. asked by Jenn
3. 1,387 views
Sona is trying to put together a puzzle that is too difficult for her to complete alone. If the puzzle is within Sona’s zone
1. 2 answers
2. asked by april
3. 1,308 views
seawater contains approximately 3.5% NaCl by mass and has a density of 1.02 g/mL. What volume of seawater contains 1.0 g of
1. 1 answer
2. asked by Anonymous
3. 1,304 views
jo-jo had two mice, every month the number of mice doubled. in how many months would there be 2048?
1. 8 answers
2. asked by jessica
3. 1,264 views
Find the exact circumference of a circle with diameter equal to 8 ft.8 ft. 16 ft. 64 ft. what equation would u use?
1. 3 answers
2. asked by danny
3. 1,253 views
The creation of Democratic-Republican societies in 1793 and 1794 revealed that?a. American citizens were rallying behind the
1. 2 answers
2. asked by Anonymous
3. 1,251 views
A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the
1. 2 answers
2. asked by Anonymous
3. 1,245 views
A 1460-kg car is being driven up a 10.0 ° hill. The frictional force is directed opposite to the motion of the car and has a
1. 2 answers
2. asked by heather
3. 1,219 views
Calculate the mass of 2.50 x 104 molecules of nitrogen gas?
1. 1 answer
2. asked by John
3. 1,205 views
A(n) 0.163 kg baseball is thrown with a speedof 9.37 m/s. It is hit straight back at the pitcher with a final speed of 16.7 m/s.
1. 1 answer
2. asked by Maria
3. 1,200 views
solve using the elimination methodx+7y=58 -x+4y=30
1. 1 answer
2. asked by jay
3. 1,195 views
Starting at the top of a steep, icy track, a rider jumps onto a sled (known as a skeleton) and proceeds - belly down and head
1. 2 answers
2. asked by shaknocka
3. 1,193 views
Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium
1. 1 answer
2. asked by Ariel
3. 1,183 views
What is the government's role in a traditional economy?
1. 6 answers
2. asked by arthur
3. 1,177 views
The ionization constant for benzoic acid is 6.5x10^-5. find the hydrogen ion concentration at equilibrium when the initial
1. 1 answer
2. asked by Anonymous
3. 1,173 views
A 1.00L sample of seawater contains 19.4g of chloride ions, 10.8 g of sodium ions, and 1.29 g of magnesium ions. How many more
1. 1 answer
2. asked by Toni Jones
3. 1,160 views
At which point in the criminal process does the right to counsel end?
1. 1 answer
2. asked by ev
3. 1,143 views
Find the unit price and tell which is the better buy:Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4
1. 6 answers
2. asked by Sammy
3. 1,140 views
Solve the differential equation:dy/dx= (x^2+y^2)/(2xy) I know how to solve this type of problem, but I am struggling getting all
1. 1 answer
2. asked by Jake
3. 1,139 views
A rectangle is 4 inches wide by 7 inches long. When the length and width are increased by the same amount, the area is incresed
1. 1 answer
2. asked by Gabi
3. 1,131 views
Each Steel Rail is 8.0 m long and has a cross sectional area of .0025msquared. on a hot day, each rail thermally expans as musch
1. 1 answer
2. asked by Roxy
3. 1,114 views
Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the
1. 1 answer
2. asked by Anonymous
3. 1,114 views
Find all horizontal and vertical asymptotes of f(x)= 2x^2 + 7x + 12/2x^2 + 5x - 12
1. 1 answer
2. asked by kelly
3. 1,111 views
A bottle has a mass of 34.20 g when empty and 91.91 g when filled with water. When filled with another fluid, the mass is 86.24g
1. 0 answers
2. asked by Mia
3. 1,110 views
Find the unit price and tell which is the better buy:A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You
1. 2 answers
2. asked by Sammy
3. 1,109 views
A boy of mass m takes a running start and jumps on his sled at position 1. He leaves the ground at position 2 and lands in deep
1. 1 answer
2. asked by Demar
3. 1,108 views
I forgot to include these very last 2 sentences. I hope you can have a look at them, too. (I included a few phrases on grammmar,
1. 0 answers
2. asked by Mike
3. 1,106 views
At the top of a pole vault, an athlete actually can do work pushing on the pole before releasing it. Suppose the pushing force
1. 1 answer
2. asked by cool
3. 1,101 views
The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of
1. 1 answer
2. asked by Jessica
3. 1,099 views
Please help Correct punctuation and spelling only. Thanks!We have received medical information from Midvale Clinic, and copies
1. 1 answer
2. asked by April
3. 1,090 views
Patrick has a summer job passing out flyers for a store. Each flyer weighs about 0.55 ounce. If he is given a bundle of flyers
1. 4 answers
2. asked by Miranda
3. 1,087 views
A ray of light strikes a mirror at an angle of26� degrees to the normal. What is the angle of reflection? Answer in units of
1. 1 answer
2. asked by Maria
3. 1,087 views
Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.Find the
1. 1 answer
2. asked by PEG
3. 1,083 views
Light enters a plate of borosilicate crown glassat an angle of 40.2 degrees � with respect to the nor- mal to the air-glass
1. 1 answer
2. asked by leslie
3. 1,075 views
find the pK for the following ionization constants, K=1.8*10^-5 and 1.1*10^.2
1. 2 answers
2. asked by redgy
3. 1,070 views
For that problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the
1. 3 answers
2. asked by shannon
3. 1,067 views
A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently
1. 0 answers
2. asked by Jon
3. 1,064 views
A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently
1. 0 answers
2. asked by Jon
3. 1,052 views
30.0 mL of 1.50 M NaOH is diluted to 50.0 mL. What is the resulting pH?
1. 1 answer
2. asked by Anonymous
3. 1,040 views
1. You can read whatever magazine you like.2. You are able to read whatever magazine you like. 3. You may read whatever magazine
1. 1 answer
2. asked by English
3. 1,037 views
A company manufacturing surfboards has fixed costs of $300 per day andtotal costs of $5100 per day for a daily output of 20
1. 0 answers
2. asked by kelly
3. 1,010 views
what is the structure of CH3NH2 and CH3NH3
1. 1 answer
2. asked by Anonymous
3. 992 views
Solving quadratic equations by graphing?3. x2-4x + 6 = 0 4. x2-4x-1=0 5. 4x2-12x + 3 = 0 6. x2-2x-4=0
1. 1 answer
2. asked by Erin
3. 982 views
The temperature at any point in the plane is given by function f(x,y) = 100/(x^(2)+y^(2)+1). Find a direction at the point (3,2)
1. 0 answers
2. asked by Dani
3. 977 views
The equation of a nonvertical line, explain how to fine the slope without finding two points on the line.
1. 2 answers
2. asked by Cindy
3. 958 views
Differentiate.g(x)=(x^3+1)(3x^2-1) I know that the answer is 15x^4-3x^2+6x but I donot know how to get to this. I was using
1. 2 answers
2. asked by Hannah
3. 948 views
Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following
1. 1 answer
2. asked by Carly
3. 945 views
of the following which is the closest approximation to the amount of time it takes to read a 487-page book at the rate of 25
1. 1 answer
2. asked by nylija
3. 938 views
My teacher wants me to calculate the rate of enzyme activity (1/s)I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees
1. 0 answers
2. asked by paul
3. 931 views
The directional derivative of z = f(x,y) at (2,1) in the direction toward the point (1,3) is -2/sqrt(5), and the directional
1. 1 answer
2. asked by Dani
3. 925 views
This problem deals with TRADE & CASH DISCOUNTS. PLEASE HELP!!! I'm not sure which equation to use for some of the problems.
1. 7 answers
2. asked by April
3. 925 views
A gymnast is swinging on a high bar. The distance between his waist and the bar is 1.26 m, as the drawing shows. At the top of
1. 0 answers
2. asked by heather
3. 922 views
How did Americans spend their leisure time at the turn of the century?
1. 1 answer
2. asked by Betty
3. 916 views
What unit is barometric pressure measured in?
1. 1 answer
2. asked by Ana
3. 914 views
Find the critical values of P(x)p(x)= (28+x)(8-x/4) the answer was p=244-7x+8x-x^2/4 p=-x^2/4 + x + 244 p'= -x/2 +1 = 0 X=2 My
1. 2 answers
2. asked by Hannah
3. 909 views
The amount of energy released by burning a fuel source, measured in energy per mass, is called fuel value. If all the energy
1. 3 answers
2. asked by Jordan
3. 898 views
Punctuation Correction please!At the present time, the Spanish instructor Joseph Diaz has agreed to assume the major
1. 1 answer
2. asked by April
3. 895 views

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