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2012
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Questions Asked on November 19, 2012

Which of the images above represents a proof of the Pythagorean Theorem? Explain your choice, and then explain how the figure
1. 41 answers
2. asked by Eric
3. 20,212 views
An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only
1. 1 answer
2. asked by Kyle
3. 9,698 views
a bag of marbles can be divided evenly among two, three, or four friends.a) how many marbles might be in the bag b) what is the
1. 16 answers
2. asked by jha
3. 8,830 views
It is 4.7km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73E. A ship has sailed due west from
1. 1 answer
2. asked by Ashley
3. 8,189 views
The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find(a)
1. 1 answer
2. asked by Tom
3. 7,318 views
The surface of the Sun is approximately 5700 K and the temperature of the Earth's surface is about 290 K. What total entropy
1. 1 answer
2. asked by P
3. 5,746 views
A refrigerator has a coefficient of performance of 4.0. When removing 2.4x10^4 J from inside the refrigerator, how much energy
1. 1 answer
2. asked by Q
3. 5,636 views
a longitudinal wave with a frequency of 3.0 Hz takes 1.7 s to travel the length of a 2.5-m slinky (see figure 16.3). Determine
1. 1 answer
2. asked by Joe
3. 5,086 views
explain the following observations;A. an open can of soda loses its fizz quicker at room temperature than in the frig. B.
1. 1 answer
2. asked by Boo Boo
3. 4,123 views
You throw a ball downward from a window at a speed of 2.0m/s. The ball accelerates at 9.8m/s^2. How fast is it moving when it
1. 1 answer
2. asked by Skylar
3. 3,935 views
Jonah and his friends go apple picking. Jonah fills 5 baskets. each basket holds 15 apples. if 4 of jonahs friends pick the same
1. 10 answers
2. asked by stephie 22
3. 3,818 views
10. I have run for this track team for eight years.(HAVE RUN is underlined) Possible answers: A.) present perfect tense B.) past
1. 7 answers
2. asked by Deborah
3. 3,735 views
Thinking about the different types of numbers you learned in this unit, how would you help someone remember the differences
1. 7 answers
2. asked by Eric
3. 3,328 views
Which do not obey the octet rule?Check all that apply. NO BF3 ICl2^- OPBr3 XeF4 An explanation would be appreciated, thanks.
1. 2 answers
2. asked by Ezra
3. 3,323 views
The molar concentrations for the reactants and products at equilibrium are found to be [HCl] = 0.80 M, [O2] = 0.20 M, [Cl2] =
1. 3 answers
2. asked by tracy
3. 3,194 views
The underlined words (I put them in parantheses) are an example of a(n) ___________.(When the earth, moon, and sun are in line),
1. 3 answers
2. asked by anon
3. 2,719 views
In an experiment, 0.0300 moles each of SO3(g), S02(g), and O2(g) were placed in a 10.0L flask at a certain temperature. When the
1. 1 answer
2. asked by Mitch
3. 2,624 views
An open train car, with a mass of 2150 kg, coasts along a horizontal track at the speed 2.29 m/s. The car passes under a loading
1. 1 answer
2. asked by Kyle
3. 2,527 views
An electrical generating plant operates at a boiler temperature of 220 deg C and exhausts the unused heat into a nearby river at
1. 1 answer
2. asked by R
3. 2,477 views
When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the
1. 1 answer
2. asked by tracy
3. 2,475 views
Paul is painting a square wall with an area of 115 square feet. To the nearest foot, what is the length of the wall? Hint: A =
1. 2 answers
2. asked by Eric
3. 2,474 views
11. Fats help maintain your cell membranes. (1 point)TrueFalse 12. Your body does not use energy when you sleep. (1 point)True
1. 3 answers
2. asked by tesj
3. 2,391 views
A 50.0-g sample of a conducting material is all that is available. Theresistivity of the material is measured to be 11 x 10-8
1. 1 answer
2. asked by Emma
3. 2,358 views
How many grams of protein are in 100 grams of termites?
1. 2 answers
2. asked by viviana
3. 2,239 views
8) A consumer groups tries to determine the most expensive items in a convenience store. Four items arepurchased in the
1. 2 answers
2. asked by Kay
3. 2,215 views
4HCl+O2=2Cl2+H2ODetremine the Kc expression for the reaction above by identifying what belongs in the numerator and what belongs
1. 1 answer
2. asked by byke
3. 2,168 views
During a neighborhood baseball game in a vacant lot, a particularly wild hit sends a 148-g baseball crashing through the pane of
1. 1 answer
2. asked by Kyle
3. 2,084 views
Can someone help draw/explain the Lewis Dot Structure for OPBr3. I've tried different things, but none of them seem to work.
1. 1 answer
2. asked by M
3. 2,078 views
A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 2.80 m/s. The coefficient of
1. 1 answer
2. asked by Emily Tran
3. 2,043 views
Consider a piece of metal that is at 5 deg C. If it is heated until it has twice the internal energy, its temperature will be.a)
1. 2 answers
2. asked by S
3. 1,992 views
A company has 2 machines. On any day, each machine that is working has a 1/3 chance of breaking down. If a machine breaks down
1. 1 answer
2. asked by Denise
3. 1,957 views
10. I have run for this track team for eight years.Possible answers: A.) present perfect tense B.) past perfect tense C.) future
1. 3 answers
2. asked by Deborah
3. 1,938 views
A person consumes 2500 kcal/day while expanding 3500 kcal/day. In a months' time, about how much weight would this person lose
1. 1 answer
2. asked by T
3. 1,897 views
By titration it is found that 69.9 mL of 0.151 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the
1. 1 answer
2. asked by Janessa
3. 1,830 views
How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.Need
1. 2 answers
2. asked by V
3. 1,712 views
The length of the hypotenuse of a right triangle is 15 cm. The length of one leg is 9 cm. Find the length of the other leg.6 cm
1. 5 answers
2. asked by Eric
3. 1,628 views
1. Why do the sorceresses agree to kill Sunjata? (1 point)Sunjata declined his father's cows. Sunjata had befriended Jelimusoni
1. 1 answer
2. asked by Anonymous
3. 1,627 views
Determine the amount (in grams) of boron that when substitutionally incorporated into 1 kg of silicon will establish a charge
1. 3 answers
2. asked by selly
3. 1,621 views
A solid has weight of 400g in air and when partly immersed in a liquid , has a weight of 320g. if it has a relative density of
1. 3 answers
2. asked by Linda naa welbeck
3. 1,616 views
light is an electromagnetic wave and travels at a speed of 3.00 x 108 m/s. the human eye is most sensitive to yellow-green light
1. 2 answers
2. asked by Joe
3. 1,586 views
472 mL of H2 gas was collected over water when 1.256 g of Zn reacted with excess HCl. The atmospheric pressure during the
1. 3 answers
2. asked by Jeremiah
3. 1,574 views
PCL5=PCl3+Cl2a. Initially 0.72 mole PCl5 are placed in 1.50 L flask. At equilibrium, there is 0.16 mole PCl3 in the flask. What
1. 1 answer
2. asked by chemdummy79
3. 1,563 views
How much heat (in {kJ}) evolves when 7.0L of C2H2(d = 1.0967kg/m^3) is mixed with a stoichiometric amount of oxygen gas? The
1. 1 answer
2. asked by Chironjit
3. 1,546 views
Been trying this forever so it says: Simplify 1+sin2x+cos2x/1+sin2x-cos2xive tried this problem so many times I need help with
1. 1 answer
2. asked by Maria
3. 1,525 views
a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl]
1. 1 answer
2. asked by Tracy
3. 1,503 views
If water is added to magnesium nitride, ammonia gas is produced when the mixture is heated.Mg3N2(s) + 3 H2O(l) => 3 MgO(s) + 2
1. 1 answer
2. asked by sam
3. 1,489 views
A pond with a flat bottom has a surface area of 820 m^2 and a depth of 2.0m. on a warm day, the surface water is a temperature
1. 2 answers
2. asked by R
3. 1,486 views
Would a damp filter paper affect the theoritical yield, calculated actual yield and calculated percent yield. Please help.
1. 1 answer
2. asked by Anonymous
3. 1,411 views
When 25.0g of Zn reacts with Hcl, how many L of H2 gas are formed at STP?
1. 1 answer
2. asked by Kenya
3. 1,407 views
A model rocket is launched from a height of 50 feet. the formula: h=-16t^2+70t+50 describes the rocket's height,h,in feet t
1. 1 answer
2. asked by nicole
3. 1,388 views
Truck suspensions often have "helper springs" that engage at high loads. One such arrangement is a leaf spring with a helper
1. 0 answers
2. asked by Emily Tran
3. 1,384 views
a converging mirror of focal length 20cm forms an image which is twice the size of the object .calculate 2 possible distances of
1. 1 answer
2. asked by shajal
3. 1,363 views
Use the following numbers for this question.MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000
1. 1 answer
2. asked by Anonymous
3. 1,353 views
How do you determine the mass of NACL needed to prepare 25.00 ml of a 1.585M NaCl Solution?
1. 2 answers
2. asked by Jenny
3. 1,316 views
A uniform solid sphere rolls down an incline. What must be the incline angle (deg) if the linear acceleration of the center of
1. 1 answer
2. asked by JV
3. 1,298 views
Determine in which direction the parabola below opens.y = 6x2 + 4x + 1
1. 1 answer
2. asked by ebb
3. 1,297 views
Balance the following equations for a half reaction that occurs in a acidic solutionA) ClO3- --> Cl2 B)H2BO3- -->BH4- C) MnO4- +
1. 1 answer
2. asked by Anonymous
3. 1,284 views
A 100.0mL solution containing aqueous HCl and HBr was titrated with 0.1290M NaOH. The volume of base required to neutralize the
1. 1 answer
2. asked by Melia
3. 1,279 views
A ball is dropped from a height of 36 feet. The quadratic equationd=1/2 gt^2 is used to calculate the distance (d) the ball has
1. 2 answers
2. asked by Lux
3. 1,262 views
What is the sqaure root of thirty six over forty nine?
1. 4 answers
2. asked by Eric
3. 1,261 views
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to
1. 2 answers
2. asked by Kevin pls it's due at midnight :(
3. 1,256 views
the distance between a loudspeaker and the left ear of a listener is 2.70 m a) calculate the time required for sound to travel
1. 1 answer
2. asked by Joe
3. 1,224 views
How many dollars did he receive if he exchanged 42.7 pesos at a rate of $5.30 = 11.1 pesos.
1. 1 answer
2. asked by Anonymous
3. 1,220 views
The daily total cost (in dollars) incurred by Trappee and Sons for producing x cases of TexaPep hot sauce is given by the
1. 2 answers
2. asked by Julie
3. 1,217 views
there are 240 patients in a hospital with health insurance, while 60 patients are without health insurance. write a simplified
1. 1 answer
2. asked by Anonymous
3. 1,215 views
A 40,000 kg railroad car initially traveling at 10 m/s collides in elastically with a 20,000 kg railroad car intially at rest.
1. 1 answer
2. asked by Anonymous
3. 1,210 views
A 40,000 kg railroad car initially traveling at 10 m/s collides inelastically with a 20,000 kg railroad car intially at rest.
1. 0 answers
2. asked by Joshua
3. 1,209 views
A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to
1. 1 answer
2. asked by Annie
3. 1,207 views
A geographical globe has a radius of 18cm.find the radius of the circleformed by the parallel of latitude 56 degrees south.
1. 4 answers
2. asked by Tosin
3. 1,205 views
as you push a lawn mower , the horizontal force is 300n, if you push the mower a distance of 500m, how much work do you do?
1. 1 answer
2. asked by Madison
3. 1,169 views
show me how to do 400 divided by 43.18=
1. 1 answer
2. asked by amelia
3. 1,156 views
A solution containing 80g of NaNO3 in 75g of H2O at 50 degrees celsius is cooled to 20 degrees celsius, how many grams of solid
1. 0 answers
2. asked by Boo Boo
3. 1,152 views
decide on a topic which is adding more clubs for which they would like to collect data anddesign a survey for school which could
1. 1 answer
2. asked by Emily
3. 1,136 views
For which of the following situations can the equation F = mg not be used to calculate the force due to gravity?a) The pull of
1. 1 answer
2. asked by Kelvin
3. 1,124 views
A crate with a mass of 110 kg glides through a space station with a speed of 2 m/s. An astronaut speeds it up by pushing on it
1. 0 answers
2. asked by Emily Tran
3. 1,117 views
how do I create parallel construction for this sentence? To succeed in the new economy, workers will have to learn throughout
1. 1 answer
2. asked by Anonymous
3. 1,105 views
1. They move only 2 meters an hour.2. They move only for 2 meters an hour. 3. They move for only 2 meters an hour. (Are all
1. 1 answer
2. asked by rfvv
3. 1,054 views
What is the concentration in mol/L of a CuSO4 solution containg 1.0 mole of CuSO4 in 250 mL of Solution?I would like to know how
1. 1 answer
2. asked by Hannah
3. 1,052 views
A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg⋅m2 and radius R = 10cm. There is friction in the
1. 1 answer
2. asked by mike
3. 1,052 views
Analyze the following scenario: The Hospital for Ordinary Surgery uses pharmaceuticals for its patients. It started the year on
1. 0 answers
2. asked by TITO
3. 1,045 views
at a distance of 3.8 m from a siren, the sound intensity is 3.6 x 10-2 W/m2. Assuming that the siren radiates sound uniformly in
1. 0 answers
2. asked by Joe
3. 1,044 views
How many grams of I2 are present in a solution if 38.55ml of 0.160M Na2S2O3 solution is needed to titrate I2 the solution?
1. 1 answer
2. asked by Michi
3. 1,011 views
From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a
1. 0 answers
2. asked by Joe
3. 1,005 views
Fool's gold is not gold at all but only lead IV sulfide. If you have 751.0 grams of lead how many grams of fool's gold can you
1. 1 answer
2. asked by Maria
3. 991 views
2 xsquare y -3 xsquare+ 4 y=2010
1. 1 answer
2. asked by emani
3. 983 views
9. In which system is heat usually transferred from the cooler part to the warmer part?a. A stove as it heats up water. b. A
1. 0 answers
2. asked by S
3. 982 views
decide on a topic for which they would like to collect data anddesign a survey for school which could really be used to convince
1. 2 answers
2. asked by Jaskuine
3. 981 views
A shell is fired from the ground with an initial speed of 1.58 103 m/s at an initial angle of 31° to the horizontal.(a)
1. 1 answer
2. asked by mel
3. 935 views
What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)?I think the answer is: -10.4/-3.5. Not sure on this
1. 1 answer
2. asked by Tim
3. 931 views
Which of the following comparisons between Mexico's coastal areas and its heartland is accurate?a. The heartland gets very
1. 7 answers
2. asked by rawr... im a dinosaur.... rawr
3. 913 views
A wire 10m long is cut into 2 pieces. one piece will be cut into a square the other piece will be shaped into a circle. Graph A=
1. 3 answers
2. asked by ann9012
3. 894 views
a 12.0g of sample A (70.2g/mol)was burned in a bomb calorimeter in an excess of O2(g).A+2 O2(g)---> 2 CO2(g) +2 H2O(l) The
1. 1 answer
2. asked by evelyn
3. 887 views
A daredevil decides to jump a canyon of width8.4 m. To do so, he drives a motorcycle up an incline sloped at an angle of 12.6
1. 1 answer
2. asked by Anonymous
3. 880 views
could you use a pictograph to display the data from a double bar graph?
1. 4 answers
2. asked by Jaskuine
3. 879 views
1. People were worried that their souls might not get back into their bodies.2. People were worried because their souls might
1. 1 answer
2. asked by rfvv
3. 878 views
Devise a test to distinguish between Cu2+ and Co2+.
1. 1 answer
2. asked by Bella
3. 875 views
A Cuboid dimension 14cm*8cm*7cm is completely emerged in cuboid trough with side 28cm containing water 20 cm.what will be the
1. 1 answer
2. asked by tuhituhi
3. 869 views
why do they call the presidents wife the first lady
1. 1 answer
2. asked by piper
3. 861 views
What is the slope of the line that passes through (-12.5,3.2)(-15.5,-7.2)?I think the answer is: -10.4/-3.5. Not sure on this
1. 1 answer
2. asked by Tim
3. 861 views
find the complex zeros of the polynomial function. write f in factored form.f(x)=x^3-10x^2+37x-52
1. 2 answers
2. asked by ladybug
3. 858 views

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