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2011
February

Questions Asked on February 23, 2011

The radius of the earth is approximately 3960 miles, what is the linear speed of a point on the equator in miles per hour. Round
1. 1 answer
2. asked by ronneka
3. 7,686 views
The radius of a wheel is 7 cm. In covering 44 km, how many revolutions will it make?
1. 4 answers
2. asked by Aravind
3. 4,151 views
According to Kleiber's Law, the metabolic rate P (in kilocalories per day) and body mass m (in kilograms) of an animal are
1. 1 answer
2. asked by Lillian
3. 3,147 views
The density of diamond is 3.51 g/cm3 and the density of lead is 11.3 g/cm3. If equal masses of diamond and lead are transferred
1. 3 answers
2. asked by Netta
3. 3,052 views
If a metal wire carries a current of 130 mA,how long does it take for 3.50×10 20 electrons to pass a given cross-sectional area
1. 2 answers
2. asked by bre
3. 2,731 views
Mrs. Rossi wrote the following clues for a mystery number. It is a 4-digit number. The tens are double the ones. The thousands
1. 3 answers
2. asked by rita
3. 2,558 views
a .140 kg baseball is dropped from rest from a height of 2.2m above the ground. it rebounds to a height of 1.6 m. what change in
1. 1 answer
2. asked by vicki
3. 2,350 views
A 11.3 weather rocket generates a thrust of 240 . The rocket, pointing upward, is clamped to thetop of a vertical spring. The
1. 2 answers
2. asked by Irina
3. 2,252 views
In the movie Superman, Lois Lane falls from a building and is caught by the diving superhero. Assuming that Lois, with a mass of
1. 2 answers
2. asked by Anonymous
3. 2,052 views
A 25 mL solution of .5M NaOH is titrated until neutralization into a 50mL sample of HCl. What was the concentration of HCl?
1. 2 answers
2. asked by E
3. 2,047 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 Kevin
3. 1,992 views
Solve each systemx + 3y = 6 4x - 5y = 7 I need to know what x and y equal??
1. 2 answers
2. asked by Melanie
3. 1,909 views
The measure of an angle of a parallelogram is 12 degrees less than 3 times the measure of an adjacent angle. find the measure of
1. 3 answers
2. asked by Sarah
3. 1,855 views
Let P(t) represent the number of wolves in a pop. at time t in years, when t is greater than or equal to 0. The pop. P(t) is
1. 1 answer
2. asked by Anonymous
3. 1,847 views
If a curve with a radius of 88m is perfectly banked for a car traveling 75km/h, what must be the coefficient of static friction
1. 6 answers
2. asked by Emily Grossman
3. 1,840 views
Calculate the concentration of oxalate ion (C2O42−) in a 0.175 M solution of oxalic acid (C2H2O4).[For oxalic acid, Ka1 = 6.5
1. 1 answer
2. asked by sarah
3. 1,816 views
What is 10x + 2y - 10 = 0 in slope intercept form ? and can you also explain how you got the answer cause I'm not really sure
1. 2 answers
2. asked by Melanie
3. 1,815 views
A continuous function f, defined for all x, has the following properties:1. f is increasing 2. f is concave down 3. f(13)=3 4.
1. 1 answer
2. asked by Cecille
3. 1,703 views
if oxygen gas were collected over water at 22c and the total pressure of the wet gas were 710 mm hg what would be the partial
1. 2 answers
2. asked by fox
3. 1,691 views
Find the expected value of a $1 bet in six-spot keno if three winning spots pays $1 (but you pay $1 to play, so you actually
1. 1 answer
2. asked by bob
3. 1,650 views
Find the slope of the tangent line to the ellipse(x^2)/4 + (y^2)/9 = 1 at the point (x,y)
1. 1 answer
2. asked by Lisa
3. 1,615 views
The lowest temperature possible in nature isa. 0 degrees C. b. 4 K. c. -273 degrees C.
1. 1 answer
2. asked by Anonymous
3. 1,597 views
Why would an alcohol/water mixure not freeze at constant temperature.
1. 1 answer
2. asked by Jude
3. 1,578 views
The reaction X + Y --> products was studied using the method of initial rates. The initial rate of consumption of X was measured
1. 1 answer
2. asked by Jamie
3. 1,522 views
Li2SO4+AgNO3= ???
1. 1 answer
2. asked by Artie
3. 1,493 views
A triangle whose sides are 5,12, and 13 inches is similar to a traingle whose longest side is 39 inches. What is the perimeter
1. 2 answers
2. asked by erika
3. 1,483 views
In acidic solution MnO4- oxidizes H3AsO3, a weak acid, to H3AsO4, a weak acid, and is reduced to Mn2+. Write the balanced net
1. 1 answer
2. asked by EJ
3. 1,478 views
An airplane is flying with a velocity of 240 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the
1. 2 answers
2. asked by jc
3. 1,469 views
why does a direct variation graph have to go through the origin?
1. 1 answer
2. asked by Anonymous
3. 1,419 views
What is the length of an equilateral triangle whose altitude has a length of 21
1. 1 answer
2. asked by Anonymous
3. 1,379 views
What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10−5]
1. 2 answers
2. asked by Peter
3. 1,354 views
Doubling the voltage across a parallel plate capacitor does not double which of the following?a. the charge b. the electric
1. 1 answer
2. asked by David
3. 1,353 views
A sound wave traveling at 342 m/s is emittedby the foghorn of a tugboat. An echo is heard 2.50 s later. How far away is the
1. 1 answer
2. asked by Maria
3. 1,317 views
A 120-kg tackler moving at 5 m/s meets head-on (and tackles) a 80-kg halfback moving at 5 m/s, after which they couple together.
1. 1 answer
2. asked by Anonymous
3. 1,302 views
3. Your firm is considering buying a new machine that costs $200,000, is expected to generate $110,000 in new revenue each year
1. 2 answers
2. asked by Whitney
3. 1,298 views
Answer questions 1 through 3 based on the following fact:Wal-Mart sometimes forced its employees to work over time without pay.
1. 1 answer
2. asked by Alma
3. 1,282 views
a pendulum length 12.3 inches swings 2 degrees and 57 minutes to each side of its vertical position. To the nearest hundredth of
1. 1 answer
2. asked by ronneka
3. 1,281 views
A railway track travelling along a level at 9 m/s collides with, and becoms coupled to a stationary truck. Find the velocity of
1. 1 answer
2. asked by Nelly
3. 1,220 views
HELP ME PLEASE!!!!!Convert to an improper fraction. Type in your answer with the negative in the numerator. -11 1/3= I have NO
1. 3 answers
2. asked by giana
3. 1,217 views
A dynamite blast at a quarry launches a rock straight upward, and 2.0 s later it is rising at a rate of 15 m/s. Assuming air
1. 2 answers
2. asked by tish
3. 1,160 views
If 0.1200g of sodium carbonate is dissolved in 50 mL of water and titrated with 0.1000 M HCl, how many mL of HCl will be
1. 1 answer
2. asked by Anna
3. 1,148 views
What is an example of the Bid-rent theory?
1. 1 answer
2. asked by Anonymous
3. 1,145 views
The human body obtains 1094 kJ from a candy bar. If this energy were used to vaporize water at 100°C, how much water in liters
1. 1 answer
2. asked by Mr.Chem
3. 1,111 views
Problem of the WeekThe Problems - Bull's Eye! 02/14/11 In the game of darts, players take turns throwing darts at a circular
1. 1 answer
2. asked by Anonymous
3. 1,097 views
(10 Points) A contractor is trying to estimate the distance to be expected of a drawdownof 4.81 m from a pumping well under the
1. 1 answer
2. asked by Jazmin
3. 1,059 views
one example of symbolism in the short story ''A company full of laughing faces''.pl help
1. 0 answers
2. asked by ted
3. 1,054 views
A loop of wire is lying flat on a tabletop. A uniform magnetic field is directed vertically UPWARDS such that it is
1. 0 answers
2. asked by Kelly
3. 1,053 views
N2 + O2 = 2NO enthalpy change = +180.6kJc) what is the enthalpy change for the formation of one mole of nitrogen monoxide? d)
1. 1 answer
2. asked by Farah
3. 1,048 views
A diver runs horizontally with a speed of 0.759 m/s off a platform that is 10.0 m above the water. What is his speed just before
1. 0 answers
2. asked by jc
3. 1,021 views
1. Vamos ____ para comprar comestibles.a. a la tienda de regalos b. al almacén c. a la cocina d. al supermercado D? 2. Para
1. 1 answer
2. asked by mysterychicken
3. 1,014 views
would an Egyptian style revolution beneficial or detrimental to the US government?
1. 1 answer
2. asked by Matthew
3. 997 views
A loop of wire is lying flat on a tabletop. A uniform magnetic field is directed vertically UPWARDS such that it is
1. 0 answers
2. asked by Kelly
3. 996 views
did perimeter and area of rectangles change in the same way it does for squares explain your thinking
1. 2 answers
2. asked by chance
3. 994 views
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.07 m, measured from its tip to
1. 0 answers
2. asked by heather
3. 990 views
A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the
1. 0 answers
2. asked by tish
3. 987 views
Suppose you wanted to dissolve 40.0 g of NaOH in enough H20 to make 6.00 L of solution and what is the molarity of the solution?
1. 2 answers
2. asked by Servando
3. 972 views
Car 1 has a mass of m1 = 65 multiplied by 103 kg and moves at a velocity of v01 = +0.95 m/s. Car 2, with a mass of m2 = 92
1. 0 answers
2. asked by Lauren
3. 963 views
consider pairs of rectangles where the dimensions are doubled (rectangles with all sides X2 and all sides X4, or those with all
1. 2 answers
2. asked by chance
3. 957 views
Stuck in the middle of a frozen pond with only your physics book, you decide to put physics in action and throw the 6-kg book.
1. 1 answer
2. asked by Anonymous
3. 951 views
A cat rides a merry-go-round turning with uniform circular motion. At time t1 = 1.80 s, the cat's velocity is (3.60 m/s)i +
1. 0 answers
2. asked by leo
3. 944 views
What is the relationship between the degree of a polynomial and the number of zeros (roots) it posses? Be sure to explain in
1. 2 answers
2. asked by jodie
3. 939 views
When a certain spring is stretched beyond its proportional limit, the restoring force satisfies the equation F=-kx+βx^3. If
1. 4 answers
2. asked by Irina
3. 924 views
how many milliliters of 0.0850 m naoh are required to titrate 50.0 ml of a solution that contains 1.85 g of hcl per liter to the
1. 1 answer
2. asked by Charles Maxey
3. 906 views
Don has three times as many games as Carlos. Write an algebraic expression that shows how many games Don has
1. 1 answer
2. asked by Sky
3. 898 views
I can't figure this question out.If there are three weights attached to the corners of an equilateral triangle with side length
1. 0 answers
2. asked by Paul
3. 889 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. 0 answers
2. asked by Anthony
3. 887 views
solve each system1) 3x + y = 6 2x + 3y = 13 2) 2x + 5y - 6 = 0 -2x + y - 2 = 0 3) x + 3y = 6 4x - 5y = 7
1. 1 answer
2. asked by Melanie
3. 880 views
How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of
1. 1 answer
2. asked by Emily Grossman
3. 874 views
Two planes of the same mass collide head-on and becomes tangled so that they move on together. If the engines of both were
1. 2 answers
2. asked by Nelly
3. 867 views
i am just abt to finish my 10th grade,i am very weak at maths and science,hence i have opted to take economics.1.is this the
1. 10 answers
2. asked by sam
3. 862 views
A projectile (mass = 0.10 kg) is fired at and embeds itself in a target (mass = 2.11 kg). The target (with the projectile in it)
1. 2 answers
2. asked by Lauren
3. 854 views
A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 3.1 m/s. Through how many revolutions has the soccer
1. 0 answers
2. asked by Tin
3. 847 views
A piece of zinc with a mass of 0.100 g reacts with 20.0 mL of 6.0 M HCl at a temperature of 25 C and a pressure of 750 mm Hg in
1. 1 answer
2. asked by mbm
3. 845 views
A block rides on a piston that is moving vertically with simple harmonic motion.(a) If the SHM has period 3.1 s, at what
1. 0 answers
2. asked by Jake
3. 844 views
Some solid copper(II) sulfate is dissolved in sufficient water to make 100.0 mL of solution. Enough of a sodium hydroxide
1. 1 answer
2. asked by OLGA
3. 816 views
what was the name of the french fort attacked by the spanish
1. 2 answers
2. asked by jazmine
3. 812 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 R'Angel
3. 809 views
A person who weigh 500N climbs a flight of straight from the ground to the 4th floor of a building in 40sec. If the height of
1. 1 answer
2. asked by EM
3. 792 views
How do I solve polynomial equation by finding all complex roots?The problem is: factor each expression and find all complex
1. 2 answers
2. asked by Jessica
3. 777 views
Consider the reaction: 2 H2S(g)--><-- 2H2(g) + S2 Kp= 2.4 x 10^-4 at 1073kA reaction mixture contains .112 atm of H2,.055 atm of
1. 0 answers
2. asked by sally
3. 775 views
A ball is thrown up onto a roof, landing 4.50 s later at height h = 20.0 m above the release level. The ball's path just before
1. 0 answers
2. asked by Bob
3. 772 views
Angle GHJ and Angle IHJ
1. 2 answers
2. asked by matthew
3. 769 views
design an experiment that will allow you to determine the length of the soccer field from one set of goal posts to a single goal
1. 0 answers
2. asked by shan
3. 758 views
A sled initially at rest has a mass of 47.2 kg, including all of its contents. A block with a mass of 14.5 kg is ejected to the
1. 1 answer
2. asked by Anonymous
3. 747 views
Can you please check these sentences? Thank you very much.1) Vietnam was divided into two parts after World War Two. North
1. 1 answer
2. asked by Mike
3. 737 views
is this correct?sin 255degrees 225 = 180 + 45 sin(225) = sin(180 + 45) = sin(180)cos(45) + cos(180)sin(45) sin(225) = 0 +
1. 4 answers
2. asked by anon
3. 731 views
Increasing the voltage across the two plates of a capacitor will produce what effect on the capacitor?a. increase charge b.
1. 0 answers
2. asked by Kris
3. 730 views
If x^{2} + y^3 - x y^2 = 5, find dy/dx in terms of x and y.Using your answer for dy/dx, fill in the following table of
1. 1 answer
2. asked by Anonymous
3. 723 views
Can you please check these sentences I'm unsure of? Thank you very much1)Nature was given great importance. (not "a" great
1. 1 answer
2. asked by Mike
3. 723 views
A system of pulleys is used to lift an elevator carrying a 3,300 newton load. assuming the pulley system is friction free,
1. 0 answers
2. asked by tania
3. 720 views
which of these words probaby comes from the latin word conducere ,meaning to lead together
1. 2 answers
2. asked by dalila benjamin
3. 712 views
A loop of wire is lying flat on a tabletop. A uniform magnetic field is directed vertically UPWARDS such that it is
1. 1 answer
2. asked by Kelly
3. 709 views
a cube is placed inside a right circular cylinder. How may cubic feet of water will file the cylinder that has the cube in it?
1. 1 answer
2. asked by jenny
3. 708 views
During a circus performance, a 67.2-kg human cannonball is shot out of a 17.1-m-long cannon. If the human cannonball spends
1. 1 answer
2. asked by heather
3. 707 views
methanol and ethanol are common organic solvents. if the mole fraction of CH3OH in a mixture of the two solvents is 0.4 what is
1. 2 answers
2. asked by jj
3. 704 views
Seawater contains 0.412 g Ca per kilogram of water. What is the number of moles of Ca per kilogram of water? What is the
1. 1 answer
2. asked by Unknown
3. 702 views
a car is stopped at a traffic light, which then turns green. The car speeds up for 85 seconds and travels a distance of 1.5
1. 0 answers
2. asked by Anonymous
3. 698 views
what is the solubility of alum in 100 ml of water at 20 degrees celcius?
1. 1 answer
2. asked by Anonymous
3. 698 views
for the polynomial complete the following table, -7x^4+8x^3-8x^2+3x-4. Degree of the term, Coefficient, Degree of the term,
1. 1 answer
2. asked by Esther
3. 694 views
A skateboard track has the form of a circular arc with a 3.20 m radius, extending to an angle of 90.0° relative to the vertical
1. 1 answer
2. asked by king
3. 681 views

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