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2012
April

Questions Asked on April 29, 2012

Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car on the tracks.part a)If the train's mass is
1. 4 answers
2. asked by john
3. 9,286 views
A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm.a)Find the
1. 1 answer
2. asked by Kristie
3. 8,829 views
I really need some help, I don't fully understand. Exspecially with fractions, don't know how to enter them on calculator.1.
1. 26 answers
2. asked by lilman
3. 8,480 views
question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?
1. 2 answers
2. asked by emma
3. 4,433 views
A balloon rubbed against denim gains acharge of −2.0 µC. What is the electric force between the balloon and the denim when
1. 5 answers
2. asked by Angel
3. 4,362 views
Express the repeating decimal as a ratio of two integers.1.23535353535...
1. 4 answers
2. asked by Sangita
3. 3,970 views
Air is filled at 60deg C in a vessel of open mouth. Upto what temperature should the vessel be heated so that one-fourth of the
1. 8 answers
2. asked by ridhi
3. 3,201 views
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air,
1. 2 answers
2. asked by chelsea
3. 3,136 views
Chalcocite is an ore from which copper can be extracted for commercial use. The formula for this important ore is Cu2S. In the
1. 5 answers
2. asked by BreAnne
3. 2,637 views
word problem can you help me:a trapezoid has an area of 4 square units, and a height of 1 unit. what are the possible whole
1. 7 answers
2. asked by marko
3. 2,568 views
A small cork with an excess charge of +6.0 µCis placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is
1. 2 answers
2. asked by Angel
3. 2,508 views
Alfred spent 1/4 of his money on food,1/3 on clothing and saved the rest.If he saved #72,000.How much did he spend on food?
1. 3 answers
2. asked by Chibueze
3. 2,495 views
5. A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top ofthe wheel after the
1. 2 answers
2. asked by PAM
3. 2,167 views
Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils
1. 2 answers
2. asked by emma
3. 1,904 views
1)when a certain polynomial is divided by x - 3, the quotient is x^2+2x-5 and the remainder is -3. what is the polynomial2) Find
1. 1 answer
2. asked by sarah
3. 1,813 views
The equation of motion of a particle in vertical SHM is given by y = (10 cm) sin 0.80t.(a) What is the particle's displacement
1. 1 answer
2. asked by Darla
3. 1,789 views
World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude
1. 1 answer
2. asked by Emma
3. 1,770 views
A tight rope is stretched 30 feet above the ground between the Jay and the Tee buildings, which are 50 feet apart. A tightrope
1. 2 answers
2. asked by Naseba
3. 1,755 views
Two baseballs, each with a mass of 0.157 kg, are separated by a distance of 379 m in outer space, far from any other objects. If
1. 3 answers
2. asked by Stella
3. 1,751 views
Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first
1. 7 answers
2. asked by Caroline Sunshine
3. 1,598 views
A 1.00 L flask containing the equilibrium mixture CO +Cl2 <-> COCl2 was found to contain 0.400 mol of COCl2, 0.100 mol of CO,
1. 1 answer
2. asked by Divya
3. 1,577 views
How much more work is done to push a box 2.5 m with a force of 30 N than to push a box 2.0 m with a force of 26 N?
1. 1 answer
2. asked by Anonymous
3. 1,520 views
an empty density bottle weighs 25 gram. when completely filled with water, it weighs 55 gram and when completely filled with a
1. 1 answer
2. asked by Surabhi
3. 1,502 views
A professor informs her class that a test is very difficult, but the grades will be curved. Scores for the test are normally
1. 2 answers
2. asked by Sabrina
3. 1,499 views
Two projectiles A and B are projected at the same time in the same vertical plane. A is projected at a height of 2m above the
1. 3 answers
2. asked by ridhi
3. 1,473 views
Finding the bugs.// Each time a salesperson sells a car at the Pardeeville New and Used Auto Dealership, // a record is created
1. 2 answers
2. asked by Alisa
3. 1,443 views
find the absolute extrema of f(x)=sin pi x on [-1,2]Not sure how to do this problem....
1. 1 answer
2. asked by Tyler
3. 1,428 views
Tyrone rounded 23.94 to 24.How did he round?A to the nearest hundredth B to the nearest tenth C to the nearest one D to the
1. 1 answer
2. asked by lidia
3. 1,391 views
A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top ofthe wheel after the
1. 1 answer
2. asked by Anonymous
3. 1,384 views
A plane is flying at a speed and direction of 550 mph, 25 degrees north of west. There is a wind of 28 mph, at an angle of 19
1. 1 answer
2. asked by Ashley
3. 1,369 views
An arithmetic series has a first term 8 and third term 20. What does the fifth term equal? What does the second partial sum
1. 1 answer
2. asked by Kasey
3. 1,360 views
a rectangular piece of cardboard measuring 14 inches by 27 inches is to be made into a box with an open top by cutting squares
1. 2 answers
2. asked by kim
3. 1,348 views
A 115 mL sample of a 10.0 M ethylene glycol (C2H6O2) solution is diluted to 1.30 L. What is the freezing point of the final
1. 1 answer
2. asked by Jen
3. 1,333 views
a bicycle tire that has a volume of 0.85L is inflated to 140 pounds per square inch. What will be the pressure in the tire if
1. 1 answer
2. asked by Bryan
3. 1,310 views
Write the IUPAC name for straight-chain hydrocarbon with this formula: CH3CH2CH2CH2CH2CH2CH3Write the IUPAC name for any
1. 1 answer
2. asked by Allison
3. 1,259 views
The finding that light in free space has one speed, and one speed only, is consistent with ____________________. A) the
1. 2 answers
2. asked by Kristie
3. 1,234 views
3. The campus radio station WVAS surveyed 190 students to determine the types of music they liked. The survey revealed that 114
1. 1 answer
2. asked by cjones
3. 1,190 views
Critically discuss 8 ways in which the environmental problem impact on the community or any other community in South Africa.
1. 3 answers
2. asked by Nicola
3. 1,170 views
Heres the equation:(x^2)-(4y^2)-(4x)+(24y)-(36)=0 Your supposed to find the coordinates of the center, foci, and vertices, and
1. 6 answers
2. asked by Maya
3. 1,142 views
could you calulate the total, average variable, and average cost, when a company marginal cost of production is $5.00 per unit
1. 0 answers
2. asked by Anonymous
3. 1,123 views
a farmer wants to enclose a rectangle garden using the sides of her barn as one side of the rectangle. what is the maximum area
1. 5 answers
2. asked by ShelbyA
3. 1,101 views
True or false? (if false, replace word in *here*)1) The random changes of allele frequencies associated with genetic drift
1. 1 answer
2. asked by Max
3. 1,099 views
a book having a mass of 1.3kg lies on a shelf 1.8 m above the floors in a room whose ceiling is 2.5 m high. What is the books
1. 0 answers
2. asked by Jen
3. 1,097 views
Give a numerical example to show that a monopolist's marginal revenue can be upward-sloping over part of its range. Hint: The
1. 0 answers
2. asked by dee dee
3. 1,092 views
What trend did Johan Palmstruch start in Europe? How successful was this trend?
1. 1 answer
2. asked by Labz
3. 1,089 views
write a skeleton equation for this reaction hydrogen iodide(g)->hydrogen+iodide(G)
1. 1 answer
2. asked by Jessica
3. 1,087 views
A mass of 710 kg is located at the origin. A second mass, 44.0 kg, is located at the point (0.216,0.702) m. Find the magnitude
1. 2 answers
2. asked by Marc
3. 1,079 views
In some dogs, long hair (L) is dominat over short hair (l), and wavy hair (W) is dominant over straight hair(w).Draw a cross
1. 2 answers
2. asked by Webdy
3. 1,076 views
You are designing a study to determine whether music has an effect on learning. Previous research indicates that the standard
1. 0 answers
2. asked by tammy
3. 1,068 views
f(x)=((6x-3)/(x+6)) how do you find the intervals of decreasing and increasing...I found that there were no critical points yet
1. 1 answer
2. asked by Cheallaigh
3. 1,058 views
I need help with parallelism i need to rewrite these sentences.1. Because of prejudice in the corporation, not only did he leave
1. 24 answers
2. asked by Courtney
3. 1,049 views
Hetfield and Ulrich, Inc., has an odd dividend policy. The company has just paid a dividend of $7 per share and has announced
1. 1 answer
2. asked by T
3. 1,011 views
1.)A sample of oxygen took 55 seconds to travel a certain distance. How long would it take for the same number of moles of
1. 3 answers
2. asked by Bryan
3. 1,010 views
Ways in which Air pollution impact on the community
1. 2 answers
2. asked by Jane
3. 994 views
what force must the woman in Figure 3.38 exert on the floor with her hands in order to do a pushup?
1. 1 answer
2. asked by Anonymous
3. 990 views
If 7 3/8 pounds of peanuts, 2 1/4 pounds of walnuts, and 1 pound of pecans are divided equally to create 5 bags of mixed nuts,
1. 1 answer
2. asked by kayla
3. 985 views
an object of mass 0.1kg is rotated in a horizontal circle by a string 1m long. the maximum tension in the string before it
1. 7 answers
2. asked by ridhi
3. 976 views
an auditor wishes to test the assumption that the mean value of all accounts receivable in a given firm is $260.00 she will
1. 0 answers
2. asked by b
3. 967 views
Light has a maximum constant speed in which of the following? A) water.B) red glass.C) the upper atmosphere.D) clear glass.E)
1. 2 answers
2. asked by Kristie
3. 962 views
A block moves on a rough slope of length 10 m inclined at 30 degrees to the horizontal. The coefficiebt of friction between the
1. 0 answers
2. asked by Jat
3. 944 views
2. The Witherspoon Down Company specializes in making down jackets, ski vests, and comforters. The requirements for down and
1. 0 answers
2. asked by cjones
3. 940 views
Is it possible for a degree-4 polynomial P(x) to have only complex (no real) roots
1. 2 answers
2. asked by nash
3. 925 views
The mean length of a work week for the population of workers was reported to be39.2 hours. Suppose that we would like to take a
1. 1 answer
2. asked by frances
3. 917 views
Use compound angle formulae to express Second harmonic i2= sin2t and the the third harmonic i3=sin3t in terms of the first
1. 3 answers
2. asked by Stephan pultree
3. 914 views
A diver standing on the diving board has a mass of 89.0 kg and has a gravitational potential energy of 2.50 x 103 J. Determine
1. 0 answers
2. asked by JodyAnn
3. 877 views
Describe the operation of electrons in a conductor
1. 1 answer
2. asked by Esther
3. 862 views
A rubber ball is dropped from a height of 10meters,suppose it rebounds one-half the distance after each fall.find the total
1. 2 answers
2. asked by wilfred
3. 859 views
If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time
1. 1 answer
2. asked by Kelsey
3. 854 views
Well i took this test and failed. This is the last test and i graduate. I posted [my answers] to the ones i think are right.1.
1. 3 answers
2. asked by Caralynn93
3. 841 views
Cadmium and a solution of cadmium(II) nitrate are used with tin and a solution of tin(II) nitrate to construct a galvanic cell.1
1. 0 answers
2. asked by chamy
3. 836 views
How does water ppllution cause ill health,accidents,crises,and disaster within our community or globally
1. 1 answer
2. asked by Khululekile
3. 830 views
What effect do drugs,dangerous weapons and bullying have on schooling and education
1. 1 answer
2. asked by Mongikazi
3. 829 views
Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over
1. 1 answer
2. asked by preshi
3. 827 views
Consider a wave that travels a distance of 3 meters in 1 second with a frequency of 2 hertz. What is its amplitude? A) 4
1. 1 answer
2. asked by Kristie
3. 822 views
Write an equation of the hyperbola with foci (0, ) and (0, 2) and vertices of (0, ) and (0, 1).
1. 1 answer
2. asked by david
3. 810 views
If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time
1. 1 answer
2. asked by Billy
3. 809 views
choose two literary devices such as foreshadowing in sense ans sensibility
1. 1 answer
2. asked by kkkkk
3. 800 views
Coffee Express sells three drinks -lattes mochas and cappuccinos. Each latte has 3 ounces of espresso and 13 ounces of milk.
1. 2 answers
2. asked by Anonymous
3. 797 views
Describe the lifestyle disease cancer
1. 2 answers
2. asked by Nicola
3. 796 views
The combustion of propane is given by the following reaction:C3H8 (g) + 5 O2 (g) ---> 3 CO2 (g) + 4 H2O (g) If 5.00 L of propane
1. 1 answer
2. asked by zarmeen
3. 784 views
how much must a car produce to drive 150 km if an average force of 500 N must be maintained to overcome friction?
1. 2 answers
2. asked by Anonymous
3. 779 views
A carpenter wants to be sure that the corner of a building is square and measures 6.0 ft and 8.0 ft alongthe sides. How long
1. 2 answers
2. asked by RICE
3. 770 views
Calculate the concentration of HCO3- in an aqueous solution of 0.0885 M carbonic acid, H2CO3 (aq).I was going to set this up as
1. 3 answers
2. asked by Hannah
3. 764 views
Calculate the cell potential for the following reaction as written at 79C given that [Zn^+2] = 0.819 M and [Ni^+2] = 0.014 M.Zn
1. 4 answers
2. asked by Mima
3. 762 views
please anwser soon, a rigid 4.10L flask contains a mixture of 1.25 moles of H2, 0.250 mole of O2, and sufficient Ar so that the
1. 2 answers
2. asked by Bryan
3. 762 views
thank you so much help with the problem. i have trouble solving part b of the problem you helped me with. it told me to give it
1. 3 answers
2. asked by john
3. 755 views
how much torque do you exert if you push perpendicularly on a door with a force of 30 N at a distance of 0.85 m from its hinges
1. 1 answer
2. asked by Anonymous
3. 753 views
Escribe el cual (la cual, los cuales, las cuales) o lo cual en el espacio.Nos invitaron a cenar con ellos, ____ fue una buena
1. 0 answers
2. asked by david
3. 753 views
Write a paragraph of approximately 100 - 150 words in which you make 5 recommendations on how to overcome the style/cancer
1. 5 answers
2. asked by Nicola
3. 740 views
the formula for the surface area of a cylinder is: A=2πrh+2πr^2 If the height of the cylinder is 10 inches, and the surface
1. 2 answers
2. asked by Nancy
3. 736 views
Write the next term of sequence,and then write the rule for the nth term.1)1,8,27,64,....125 the nth is 2) 3,8,15, 24,.....35
1. 1 answer
2. asked by JOSEPH
3. 733 views
How many moles of Ca(NO3)2 are needed to make 0.250 liters of a 0.200 M Calcium nitrate solution?
1. 1 answer
2. asked by AJ
3. 725 views
A 23.9 mL sample of 0.283 M trimethylamine, (CH3)3N, is titrated with 0.207 M hydrochloric acid.At the equivalence point, the pH
1. 5 answers
2. asked by Hannah
3. 718 views
At a fabrication plant, a hot metal forging has a mass of 66.8 kg and a specific heat capacity of 437 J/(kg C°). To harden it,
1. 1 answer
2. asked by RC
3. 717 views
i have to find the area of an irregular polygonhow can i draw a picture to send you to show you? is this possible?
1. 3 answers
2. asked by marko
3. 710 views
For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested.a. What is the minimum
1. 1 answer
2. asked by tammy
3. 702 views
The enthalpy change was determined for thefollowing reactions; Ca (s) + CO2 (g) + ½ O2 (g ) → CaCO3 (s) ΔH = -812.8 kJ/mo l
1. 1 answer
2. asked by Anonymous
3. 700 views
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.y=0, y=
1. 0 answers
2. asked by hamlet
3. 692 views
A marine biologist has determined that the weight of a full weight of 2000pounds and a standard deviation of 500 pounds.
1. 1 answer
2. asked by Kim
3. 677 views
explain 5 factors that contribute to the substance abuse
1. 1 answer
2. asked by karabo
3. 675 views

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