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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. 7,291 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. 7,202 views
what is the 10th term in this arithemetic sequence of 2,9,16,23,30?
1. 2 answers
2. asked by lesly
3. 4,591 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. 3,822 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. 3,708 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. 3,686 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. 3,536 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. 3,450 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. 3,391 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. 3,163 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. 3,086 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. 2,820 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. 2,789 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. 2,672 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. 2,571 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. 2,414 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. 2,295 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. 2,281 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. 2,248 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. 2,200 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. 2,146 views
Of HOOH(s) and TiO2(s) which one has the higher melting point?
1. 2 answers
2. asked by Rebekah
3. 2,143 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. 2,033 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. 1,920 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. 1,837 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. 1,798 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. 1,694 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. 1,687 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. 1,685 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. 1,656 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. 1,628 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. 1,621 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. 1,559 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. 1,553 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. 1,501 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. 1,481 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. 1,439 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. 1,428 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. 1,423 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. 1,403 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. 1,394 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. 1,389 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. 1,388 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. 1,349 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. 1,277 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. 1,266 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. 1,232 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. 1,223 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. 1,222 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. 1,216 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. 1,182 views
solve using the elimination methodx+7y=58 -x+4y=30
1. 1 answer
2. asked by jay
3. 1,169 views
Calculate the mass of 2.50 x 104 molecules of nitrogen gas?
1. 1 answer
2. asked by John
3. 1,169 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. 1,165 views
What is the government's role in a traditional economy?
1. 6 answers
2. asked by arthur
3. 1,155 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. 1,153 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. 1,147 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. 1,128 views
At which point in the criminal process does the right to counsel end?
1. 1 answer
2. asked by ev
3. 1,118 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. 1,116 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. 1,101 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. 1,098 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. 1,089 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. 1,089 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. 1,088 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. 1,082 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. 1,079 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. 1,073 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. 1,071 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. 1,071 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. 1,067 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. 1,066 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. 1,058 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. 1,055 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. 1,045 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. 1,045 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. 1,040 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. 1,037 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. 1,032 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. 1,024 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. 1,020 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. 1,003 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. 1,002 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. 970 views
what is the structure of CH3NH2 and CH3NH3
1. 1 answer
2. asked by Anonymous
3. 969 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. 952 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. 948 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. 928 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. 915 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. 910 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. 905 views
What unit is barometric pressure measured in?
1. 1 answer
2. asked by Ana
3. 896 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. 895 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. 886 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. 882 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. 878 views
How did Americans spend their leisure time at the turn of the century?
1. 1 answer
2. asked by Betty
3. 878 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. 868 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. 863 views
The temperature at any point in the plane is given by the function T(x,y)= 100/(x^2+y^2+1). Find the direction at the point
1. 0 answers
2. asked by Brittany
3. 861 views

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