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Questions Asked on September 5, 2010

While in Europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per
1. 2 answers
2. asked by Mely
3. 8,612 views
Calculate the expansion work done when 50 g of water is electrolysed under constant pressure at 25C
1. 9 answers
2. asked by Dana
3. 8,029 views
A certain element forms an ion with 54 electrons and a charge of +2. Identify the element.
1. 3 answers
2. asked by Mely
3. 7,347 views
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time
1. 2 answers
2. asked by Robin
3. 5,851 views
A rifle is used to shoot twice at a target, using identical cartridges. The first time, the rifle is aimed parallel to the
1. 2 answers
2. asked by demi
3. 3,808 views
Phosphoric acid reacts with magnesium carbonate to produce? When you predict the products and write a balanced equation the
1. 1 answer
2. asked by Mely
3. 2,656 views
use the integer to represent a withdrawal of $125 from a bank account.( i need help )
1. 5 answers
2. asked by sasha
3. 2,448 views
A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle
1. 2 answers
2. asked by demi
3. 2,039 views
A bird watcher meanders through the woods, walking 0.45 km due east, 0.60 km due south, and 2.70 km in a direction 37.0° north
1. 1 answer
2. asked by demi
3. 2,002 views
Jane is 2mi offshore in a boat and wishes to reach a coastal village 6mi down a straight shoreline from the point nearest the
1. 2 answers
2. asked by Nikki
3. 1,844 views
what is an inference?a) a conclusion that has been tested and accepted b) what is really occuring c) a tentative conclusion
1. 2 answers
2. asked by pam
3. 1,821 views
The proton has a radius of approximately 1.0 times 10^{ - 13} cm and a mass of 1.7 times 10^{ - 24} g. Determine the density of
1. 2 answers
2. asked by Mely
3. 1,605 views
The figure below shows two pint charges, each of -2Q, fixed on the y-axis at y = +a and at y = -a . A thirdpoints charge -Q is
1. 1 answer
2. asked by David
3. 1,542 views
Please help- A small fish is dropped by a pelican that is rising steadily at 0.50 m/s. How far below the pelican is the fish
1. 1 answer
2. asked by Melinda
3. 1,535 views
I had to rewrite sentences so that there were no longer fragments are they correct?1. The idea of a credit card first appeared
1. 2 answers
2. asked by keisha
3. 1,413 views
A boat can travel 2.60 m/s in still water.If the boat points its prow directly across a stream whose current is 1.10 m/s, what
1. 1 answer
2. asked by ami
3. 1,410 views
A donkey and a mule were carrying sacks of apples. The donkey groaned so the mule said to him: "Why are you complaining? If you
1. 2 answers
2. asked by Lizzy
3. 1,394 views
A total of 1200 students attend top view high school. The ratio of teachers to students is 1:30. How many teachers are there at
1. 3 answers
2. asked by christine
3. 1,394 views
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which
1. 1 answer
2. asked by demi
3. 1,343 views
the major commercial aluminium ore is bauxite,AlO3.H2O(s).What is its molar mass?The analysis of a representive sample of
1. 3 answers
2. asked by kabelo
3. 1,337 views
One of the angles of a right triangle measures 30°, and the hypotenuse is 10 inches long. How long is the side opposite the
1. 1 answer
2. asked by ben
3. 1,334 views
Cars A and B, each moving at 70 km/h, are approaching one another on a straight highway. After how many seconds will they meet
1. 1 answer
2. asked by Ryan Jude
3. 1,326 views
3 There are two charges +Q and –Q/2 that locate at two positions with a separation of d as shown in Fig. 1. Wemay put +Q at
1. 2 answers
2. asked by David
3. 1,292 views
Just need to know if my answer is wrong or right. Thank You! :)A well accepted theory in science is Einstein's Theroy of
1. 2 answers
2. asked by pam
3. 1,242 views
According to the Bohr theory of the hydrogen atom, what is the minimum energy (in J) needed to ionize a hydrogen atom from the n
1. 2 answers
2. asked by ryan
3. 1,209 views
On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23
1. 2 answers
2. asked by ashley
3. 1,193 views
A farmer planted a field of BT 124 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in
1. 2 answers
2. asked by Jim
3. 1,192 views
Suppose Lynette ride her bicycle due south at a rate of 16 miles per hour.If the wind blowing due west at 4 miles per hours
1. 2 answers
2. asked by Nancy L
3. 1,161 views
1) Solve the equation: 15(7x-6) = 3x-5My answer is (-85/108) 2) Mary and her brother collect coins. Mary has 4 times the number
1. 4 answers
2. asked by Hannah
3. 1,148 views
Use the following thermodynamic data at 298 K to determine the equilibrium constant at this temperature for the reaction of iron
1. 0 answers
2. asked by Lucinda
3. 1,122 views
A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration
1. 3 answers
2. asked by Taylor
3. 1,085 views
I am having a problem with solving this Given the function f described by f(x)=x+3, find each of the following:f(0) f(-13)
1. 1 answer
2. asked by kasey
3. 1,084 views
Calculate the reaction free energy of:H2(g) + I2(g) 2HI(g) when the concentrations are 0.026 mol L-1 (H2), 0.33 mol L-1 (I2),
1. 0 answers
2. asked by Lucinda
3. 1,055 views
wat is a palisade cell?
1. 1 answer
2. asked by Anonymous
3. 1,053 views
why to the laws on the book differ with juveniles and adults. should they? what about the punishment?
1. 1 answer
2. asked by llisa
3. 1,039 views
what is the first step in the scientific method?a) a conclusion is made b) evidence is gathered c) a problem is presented d)an
1. 3 answers
2. asked by pam
3. 1,038 views
A certain drug has a half-life of 2 hours in the bloodstream. The label says to take the drug every six hours. About how much of
1. 1 answer
2. asked by Anonymous
3. 1,027 views
a plant in the classroom appears to be wilting. The children are asked to come up with as many possible explanation for this as
1. 2 answers
2. asked by LV
3. 1,021 views
how to simplify and solve2/5(20x+5)-1/2(8-4x)=38
1. 2 answers
2. asked by kate
3. 1,019 views
there are 2 pentagonsthe small pentagon has a side that is 3cm while the side on the other larger pentagon is 8cm. the small
1. 2 answers
2. asked by Amy~
3. 1,011 views
Virginia hears a scratching sound outsides her window almost every night. Which of the following would be good evidence to
1. 2 answers
2. asked by pam
3. 1,006 views
A marble of mass m is placed on top of a bowling ball of radius r and allowed to roll from rest. derive the angle from centre of
1. 2 answers
2. asked by Andrew
3. 995 views
Use the given data at 298 K to calculate ¦¤G¡ã for the reaction2NO(g) + 2H2(g) ¡ú N2(g) + 2H2O(g) Substance NO(g) H2(g)
1. 6 answers
2. asked by Lucinda
3. 987 views
A ball of mass 1.2kg and a volume of 35cm cubed is dropped from a height of 2m. Determine the height to which this ball will
1. 4 answers
2. asked by Joe
3. 968 views
An alpha particle (mass = 6.6 10-24 g) emitted by radium travels at 2.5 107 ± 0.1 107 mi/h.(a) What is its de Broglie
1. 1 answer
2. asked by Kate
3. 962 views
The cube root of the volume of a cube gives the length of one side of the cube . Volume:343 cm^3.A:Find the side length of the
1. 4 answers
2. asked by Gaby
3. 954 views
If someone could point me in the right direction-please!!!A car with an initial speed of 4.30m/s accerlerates uniformly at the
1. 1 answer
2. asked by Andrea
3. 952 views
A construction company needs to build thirty trusses for the roof of a house.The truss is 20 ft long on the top two sides. What
1. 4 answers
2. asked by Amy~
3. 935 views
triangle PQR is translated 3 units ot the right and reflected over the line y=-1. The result is triangle P'Q'R'. Which is NOT
1. 0 answers
2. asked by Amy~
3. 913 views
Use the ratio test to determine whether the series is convergent or divergent.1/2 + 2^2/2^2 + 3^2/2^3 + 4^2/2^4 + ...
1. 1 answer
2. asked by Joe
3. 910 views
According to the Bohr theory of the hydrogen atom, what is the minimum energy (in J) needed to ionize a hydrogen atom from the n
1. 2 answers
2. asked by ryan
3. 897 views
to convert from ounces to pounds, you can multiply the nymber of ounces by 0.0625. express 0.0625 in scientific notation. : can
1. 1 answer
2. asked by sasha
3. 892 views
Which large island is located farthest north?
1. 3 answers
2. asked by Sapphire
3. 869 views
A police car traveling 100 ft/sec is chasing a car being driven erratically at 75 ft/sec. If the police car is 300 feet behind
1. 2 answers
2. asked by Arie
3. 823 views
What is the oxidation number of sulfur in SO<sub>4</sub><sup>-2</sup>?
1. 1 answer
2. asked by Mely
3. 786 views
I have two I need help with!1. An airplane is flying in a horizontal flight level at constant velocity, heading due east. If the
1. 1 answer
2. asked by Johnny
3. 779 views
Interview with a Teaching Professional•What are some examples of typical, quick decisions teachers make on a daily basis?
1. 1 answer
2. asked by Jasmine
3. 751 views
whats the average atomic mass of silver according to the following data? use four decimal pointsSilver-107 107.03528 51.86
1. 1 answer
2. asked by Lorie
3. 749 views
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is
1. 1 answer
2. asked by demi
3. 745 views
cobalt chloride forms pink crystals. when they are heated water is evolved an they turn blue. can you please explain how you
1. 2 answers
2. asked by Anonymous
3. 726 views
What is the molar concentration of 2000. mL of aqueous solution containing 125 g of glucose, C6 H12O6? Molar mass 180.15 g/mol.
1. 1 answer
2. asked by Mely
3. 721 views
describe a specific event that would make each of the following happen to a production possibilities curvea) a point moves down
1. 0 answers
2. asked by carlos
3. 718 views
The number of protons, neutrons and electrons, respectively, in 115Cd2+ are?
1. 3 answers
2. asked by cooper
3. 713 views
A sample of 100 students is selected from a known population of 1000 students to construct a 95% confidence interval for the
1. 0 answers
2. asked by Robin
3. 704 views
what does function mean in geography?
1. 0 answers
2. asked by Lucy
3. 703 views
What invention during the Renaissance period enabled people to purchase music for their own personal use?A. Faster delivery
1. 1 answer
2. asked by LV
3. 696 views
Valuing order and equality more than freedom is a characteristic ofconservative communitarians libertarians liberals
1. 2 answers
2. asked by carlie
3. 693 views
Does this article relate to latin america geography? Brazil government gives go-ahead for huge Amazon dam. What's the
1. 5 answers
2. asked by Courtney
3. 673 views
Suppose that you are at the top of a (rigid) rocket which is half a lightyear tall. If the rocket is accelerating such that your
1. 0 answers
2. asked by Ian
3. 671 views
A hypothesis is made in which stage of the scientific method?a) evidence is gathered b) the problem is presented c) a conclusion
1. 3 answers
2. asked by pam
3. 653 views
I need help with these last few questions. I don't know if they are correct,run-on or comma splice.1. Mary Lou decided not to
1. 3 answers
2. asked by keisha
3. 653 views
The speed of light is 3.00 times 10^8~m/s. How fast is this in miles per hour (miles/h)?
1. 0 answers
2. asked by Mely
3. 652 views
During a football game, two players try to tackle another play. One player applies a force of 50.0 N to the east. A second
1. 1 answer
2. asked by jeff
3. 641 views
Rate of change proportional to size:P(t)= P(i)e^kt, where P is population, t is time, k is a constant and P(i) is the initial p
1. 1 answer
2. asked by John
3. 639 views
how to do histogram and relative- frequency histogram using the #s 1,5,5,6,7,4,8,7,6,5,5,6,7,6,6,5,8,9,9,
1. 1 answer
2. asked by marilyn
3. 628 views
You are a consultant advising a company on the importance of making good assumptions before making major decisions. To explain
1. 1 answer
2. asked by hilda
3. 626 views
A company is working on the market of perfect competition. Its cost function TC=Q^2-4Q+64 and demand function on the product
1. 0 answers
2. asked by Magda
3. 622 views
Consider sending a file of 2Mbits from Host A to Host B. There are three links and two store-and-forward routers (or switches)
1. 0 answers
2. asked by Up
3. 618 views
What important characteristics do scientific theories and laws have?a) is always about planets and stars b) is correct and
1. 1 answer
2. asked by pam
3. 617 views
How would I find the missing side of an obtuse triangle?Using the pythagorean theorem ?
1. 2 answers
2. asked by Amy~
3. 616 views
Okay, I think I have the correct answer for this question. Please let me know if I am correct. Which Sea is largest? North,
1. 4 answers
2. asked by Reed
3. 613 views
There are exactly 60 seconds in a minute, there are exactly 60 minutes in an hour, there are exactly 24 hours in a mean solar
1. 0 answers
2. asked by Mely
3. 613 views
Factor completley12r^2 +36rf +27f^2 5x^5-20x^4+30x^3 Can anyone please help me with these two problems. I have to get them done
1. 1 answer
2. asked by Susan
3. 611 views
A child throws a ball with speed and accuracy when he plays catch with his teacher, but his throws are slower and less accurate
1. 1 answer
2. asked by LV
3. 611 views
find p from the formula i= prt/100 when i=20, r=5, and t=4
1. 1 answer
2. asked by max
3. 603 views
An ambulance is going down the street with its lights and siren on. the hospital is five blocks away. select all the statements
1. 2 answers
2. asked by pam
3. 602 views
science best defines observation as which of the following?a) evidence that is seen b) something to look at the planets c)
1. 2 answers
2. asked by pam
3. 598 views
Amount of an investment. The amount of an investmentof P dollars for t years at simple interest rate r is given by A � P � Prt.
1. 1 answer
2. asked by naine
3. 595 views
write equations for the reactions of NaOH(aq) with solutions containing Al^3+ Cu^2+(aq),Pb^2+(aq) and Fe^3+(aq) ions
1. 2 answers
2. asked by kabelo
3. 592 views
What would happen if correct new evidence was discovered that did not agree with a well established scientific theory?a) the
1. 3 answers
2. asked by pam
3. 590 views
a well accepted theory in science is that through chemical means, matter cannot be created or destroyed. because it is well -
1. 3 answers
2. asked by pam
3. 589 views
I recovered my deleted word file..but i cant open them!! In Microsoft word, it says "select the encoding that your document is
1. 1 answer
2. asked by prethy
3. 586 views
I an suppose to give an example of a strait. I found the example of ---Strait of Gibraltar whic connects the Atlantic Ocean and
1. 2 answers
2. asked by Reed
3. 583 views
Rate of change proportional to size:P(t)= P(i)e^kt, where P is population, t is time, k is a constant and P(i) is the initial p
1. 1 answer
2. asked by John
3. 567 views
2.633 ounces of aluminum were added to a graduated cylinder containing 16.71 mL of water. What is the new water level after
1. 1 answer
2. asked by Mely
3. 566 views
What is the molar concentration of 2000. mL of aqueous solution containing 125 g of glucose, C6 H12O6? Molar mass 180.15 g/mol.
1. 1 answer
2. asked by Mely
3. 562 views
a boat goes 16 Km upstream and 24 Km downstream in 6hrs.it can go 12Km upstream and 36 Km in same time.find the speed of boat in
1. 2 answers
2. asked by sara
3. 553 views
these marks were obtained by class of 28 students in a science test. the maximum mark possible is 25.20,17,21,15,16,15,12,14,15,
1. 1 answer
2. asked by Anonymous
3. 552 views
order the following numbers from greatest to least : 3.8 , -4.3 , -4.1 . express the answers by usinq < , <_ ,> , _>
1. 1 answer
2. asked by sasha
3. 551 views
Select all the following that could be observations:a) the sound of the ocean b) the smell of perfume c) the way a tennis ball
1. 5 answers
2. asked by pam
3. 549 views

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