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2011
August

Questions Asked on August 3, 2011

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the two pumps,
1. 3 answers
2. asked by Lisa
3. 8,804 views
In a bag there are red, green, black,and white marbles. If there are 6 red, 8 green, 4 black, and 12 white and one marble is to
1. 6 answers
2. asked by Amy
3. 4,292 views
In loading a lorry a man lifts boxes each of weight 100N throughta height of 1.5 m. a)how much work does he do in lifting 1 box
1. 5 answers
2. asked by Luc
3. 4,207 views
A)When the energy input to gas fired power station is 1000MJ,the electrical energy output is 300MJ.What is the efficiency of the
1. 3 answers
2. asked by Luc
3. 4,005 views
A hiker climbs a hill 300m high.If she weighs 50kg,calculate the work she does in lifting her body to the top of the hill
1. 5 answers
2. asked by Luc
3. 3,442 views
A baseball is hit with a speed of 27.0 m/s at an angle of 42.0 deg. It lands on the flat roof of a 10.0 m-tall nearby building.I
1. 1 answer
2. asked by Kyle
3. 3,224 views
Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced
1. 5 answers
2. asked by Astrid
3. 3,106 views
A car of mass 1200kg travelling @ 72 km/h is brought to rest in 4s.Find a) the average deceleration b)the average braking force
1. 6 answers
2. asked by Luc
3. 3,060 views
A block of mass 2kg is pushed along a table with a constant velocity by a force of 5N.When the push is increased to 9N,what is
1. 8 answers
2. asked by Luc
3. 2,971 views
A sales firm receives an average of four calls per hour on its toll-free number. For any given hour, find the probability that
1. 1 answer
2. asked by Lindsay
3. 2,461 views
1. A solution of sodium oxalate has a pH of 7.82. The [OH-] in mol/L must be which of the following:a) 6.18 b) 1.5 x 10-8 c) 6.6
1. 3 answers
2. asked by tt
3. 2,096 views
For the equilibrium system below, which of the following would result in an increase in the concentration of CO(g)?2H2(g) +
1. 1 answer
2. asked by tt
3. 1,872 views
The diagonals of a rectangle ABCD meet at O. If angle BOC is equal to 44 degree, find angle OAD.
1. 2 answers
2. asked by m.d.
3. 1,755 views
1. Which one of the following elements is characteristic ofGothic furniture? A. Melon-bulb turnings B. Tracery designs C.
1. 1 answer
2. asked by Suzan
3. 1,579 views
Please help4. As a teacher aide, if you report an incident of child abuse, A. you must be able to prove your allegations to the
1. 6 answers
2. asked by beth
3. 1,571 views
In a preliminary study, the sample standard deviation for the duration of a particularback pain suffered by patients was 18.0
1. 1 answer
2. asked by joe
3. 1,568 views
Find the equation of the parabola with the vertex at the origin and directrix y =5
1. 1 answer
2. asked by victor
3. 1,539 views
How many moles of Ne occupy 2.0 L at STP?
1. 1 answer
2. asked by Nrsn9398
3. 1,441 views
Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the
1. 1 answer
2. asked by Anonymous
3. 1,425 views
Is this French sentence correct: "Dans cet article, il s’agit des nouvelles taxes établies" if I wanted to say "This article
1. 2 answers
2. asked by dannytan
3. 1,408 views
a cylindrical container has a base radius of 14cm and height 18cm. How many litres,correct to the nearest litre, of liquid can
1. 2 answers
2. asked by stella
3. 1,276 views
I have to write a speech on a pet peeve. I chose aggressive driving. Here is my introduction for the outline. Think?Aggressive
1. 3 answers
2. asked by lizzie
3. 1,234 views
A transformer with 360 turns in its primary coil and 18 turns in its secondary coil is designed to delivered an average power of
1. 1 answer
2. asked by Sonia
3. 1,216 views
Wildlife officials had to rescue and remove seven hundred thirty−five Florida panthers in the past twelve months. It is
1. 1 answer
2. asked by drea
3. 1,205 views
Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's
1. 3 answers
2. asked by ROCKY
3. 1,205 views
Conduct a research to examine the sphere of influence of an organisation that renders a service in your area,hospital.purpose of
1. 4 answers
2. asked by Sphere of influence
3. 1,198 views
A car of mass 1200kg travelling @ 72 km/h is brought to rest in 4s and has a deceleration of 5m/s find the distance moved during
1. 2 answers
2. asked by Luc
3. 1,184 views
A 4.0 -m ladder leans against a vertical wall and makes an angle with the horizontal ground of 52degrees. What is the height
1. 1 answer
2. asked by portia
3. 1,157 views
A load of 500N is raised 0.2m by a machine in which an effort of 150N moves 1m.What is a) the work done on the load b)the work
1. 4 answers
2. asked by Luc
3. 1,152 views
10th century copper sculpture illustrated work of artist peforming "giving tangible form to the unknown" the unknown case in
1. 2 answers
2. asked by Anonymous
3. 1,140 views
A chair lift carries people of average mass 75kg to a height of 450m above the starting point. Calculate a) the work done by the
1. 1 answer
2. asked by Luc
3. 1,016 views
How much work is done when a mass of 30N is lifted vertically through 6m
1. 2 answers
2. asked by Luc
3. 1,001 views
Find the equation of the smaller circle tangent to both axes and passing the point (-3,6)
1. 1 answer
2. asked by ceasar1
3. 990 views
What mass of PbCl2 would be found in 0.48 L of a saturated solution of PbCl2 if the Ksp of PbCl2 is 1.6 x 10-5?
1. 1 answer
2. asked by J.T
3. 987 views
Write the slope-intercept equation for the line with slope -2/3 and y-intercept (0, 3) and graph the line. Please show all of
1. 2 answers
2. asked by susan
3. 948 views
In a methane fuel cell, the chemical energy of the methane is converted into electrical energy instead of heat that would flow
1. 1 answer
2. asked by Vt
3. 944 views
1.) For which of the following substances is the standard enthalpy of formation equal to zero?a) water [H2O(l)] d) carbon
1. 1 answer
2. asked by tt
3. 921 views
You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 103-kg cylinder of radius R that
1. 1 answer
2. asked by Alex
3. 920 views
Express in terms of i.2 divided by sqrt.,-36
1. 1 answer
2. asked by ROCKY
3. 911 views
In a methane fuel cell, the chemical energy of the methane is converted into electrical energy instead of heat that would flow
1. 2 answers
2. asked by Vt
3. 870 views
PCL5(g) -> PCl3(g) + Cl2 (g)Kp= 23.6 at 500K Calculate the equlibrium partial pressures of the reactants and products if the
1. 0 answers
2. asked by San
3. 869 views
Compare decimal notation to fractional notation. Which is easier to work with, in your opinion?
1. 1 answer
2. asked by Fiso
3. 828 views
1.If its molar solubility is designated by “x”, then which of the following expressions best represents the solubility
1. 3 answers
2. asked by tt
3. 801 views
A graph of y = cos(1/2 x) - sin( x) for -4ð x 4ð is shown in the figure. Assume z = 4.(the figure is just the graph) its
1. 2 answers
2. asked by g
3. 794 views
River Current A boat can travel 36 miles upstream in the same time that it can travel 54 miles downstream. If the speed of the
1. 3 answers
2. asked by Adam
3. 787 views
A box of mass 5 kg is pulled along a horizontal frictionless surface by a force of 40N inclined @ 30dgrees. Calculate A)the work
1. 1 answer
2. asked by Luc
3. 776 views
TRUE or FALSE?when ice cubes melt into liquid water, its physical properties changes
1. 1 answer
2. asked by Floyd
3. 776 views
What tools are in a "writing toolbox"?
1. 3 answers
2. asked by Rachel
3. 752 views
kris enjoys action movies at the theatre
1. 8 answers
2. asked by jose
3. 745 views
1. Show that Sin3è - Cos2è = (1 - Sinè)(4Sin^2è + 2Sinè - 1).Without using a calculator, show that è = 18 degrees is an
1. 3 answers
2. asked by Edwards
3. 699 views
Evaluate each mission statement based on the following:• Beliefs • Mission • Vision • Culture • Goals • Products
1. 3 answers
2. asked by Crystian
3. 691 views
Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat
1. 3 answers
2. asked by Vt
3. 680 views
In the figure a 1.2 block is held at rest against a spring with a force constant = 740 . Initially, the spring is compressed a
1. 0 answers
2. asked by Anonymous
3. 676 views
An 8.6 g sample of a metal is heated to 110.0oC and then placed in a coffee cup calorimeter containing 125 g of water at a
1. 1 answer
2. asked by TI
3. 674 views
give that sin( A + B )= 2cos(A - B ) and tan A = 1/3,Find the exact value of tanB
1. 3 answers
2. asked by CHRYSTABELLE
3. 673 views
Write an equation of the line containing the specified point and parallel to the indicated line.(1,4)3x+y=5
1. 2 answers
2. asked by smith
3. 669 views
A 850 kg car skidding on an icy highway at32.5 km/h slides onto some bare pavement. If the coefficient of friction between the
1. 3 answers
2. asked by Brina
3. 641 views
1. What amount of Potassium Chloride forms when 5.25 litres of Chloride gas at 0.95 atm and 293K reacts with 17.0g of Potassium.
1. 1 answer
2. asked by Kam
3. 631 views
The second angle of a triangle is 4 times as large as the first. The third angle is more than the sum of the other two angles.
1. 1 answer
2. asked by susan
3. 622 views
Hawaii is one of the most beatiful places on earht. what are the verbs in the sentence
1. 1 answer
2. asked by lily
3. 614 views
Given that A + B = 120 degrees and cosA + cos B = 1 divided by squareroot of 2,show that cos A-B divided by 2 = 1 divided by
1. 1 answer
2. asked by ceasar
3. 614 views
1. Show quantitatively how you would prepare a solution of 3.10 x 10^2 g of 0.125 molar (m) ethylene alcohol from ethylene
1. 1 answer
2. asked by eddy
3. 612 views
Will s person that is born deaf(deaf since birth) be able to speak? please provide a proof for your answer(i.e. website)
1. 3 answers
2. asked by Chester
3. 609 views
Will someone check my work here and let me know if I am right. Thanks.Evaluate x+y/7 for x=44 and y=12 My answer is x+y/7=8 2.
1. 2 answers
2. asked by babs
3. 602 views
Farmers often spray water on plants when there is a chance of frost to protect them from freezing. Calculate the amount of heat
1. 1 answer
2. asked by Vt
3. 596 views
Over a one-week period, there is a rapid increase in the number of patients entering the emergency room complaining of high
1. 1 answer
2. asked by dannytan2
3. 579 views
1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 Theta + 2Sin Theta - 1).Without using a calculator, show that
1. 0 answers
2. asked by Edwards
3. 574 views
What mass of PbCl2 would be found in 0.48 L of a saturated solution of PbCl2 if the Ksp of PbCl2 is 1.6 x 10-5?
1. 1 answer
2. asked by J.T
3. 562 views
DefinitionGender schema helps the children make sense of their world. A schema for a boy would be “boys play with trucks and
1. 1 answer
2. asked by Sharon
3. 559 views
step by step how to solve algerba problems
1. 2 answers
2. asked by Carus II
3. 559 views
use polynomial long division to divide 25x^3+40x^2+25x+10by -5x^2-3x-2
1. 1 answer
2. asked by ROCKY
3. 558 views
rewrite with positive exponents. Assume that even roots are nonnegative quanities and that all denominators are nonzero.[3/ua^2)
1. 1 answer
2. asked by ROCKY
3. 544 views
Would it be unusual for the mean of a sample of 3 to be 115 or more?
1. 1 answer
2. asked by john
3. 540 views
an investigation was done to determine the role of petals in insect pollination in apple flowers.when flowers are self
1. 0 answers
2. asked by Region
3. 536 views
The volume of the solid generated by revolving the region about the given line. above the curve y=3 below the curve y=sqrt of 3x
1. 0 answers
2. asked by Larry
3. 518 views
I still have to include a few more exercises. Thank you very much.1) Complete the sentences with must/mustn’t, have to/don’t
1. 1 answer
2. asked by Henry
3. 516 views
4. During a practical exercise, you find out that you need to adjust the pH of a strong acidic solution of volume 5.6 litres
1. 2 answers
2. asked by Edwards
3. 516 views
An athlete runs 12 laps on a 400m running track every day for 2 weeks. How many kilometers does she run in total?
1. 2 answers
2. asked by Bella
3. 507 views
consider a solid cylinder rolling from rest down a plane inclined at an angle theta to the horizontal.After rolling down a
1. 1 answer
2. asked by victor2
3. 500 views
what is (x to the 3rd power + x to the 2nd power) divided by ((x+4)(X-4)) multiplied by (x+4) divided by (3x to the 4th power +
1. 2 answers
2. asked by kellie
3. 488 views
put function in standard formf(x)=-4x^2-32x+9
1. 1 answer
2. asked by Josh
3. 488 views
What decimal is equivalent to seven and 3 over two hundred fifty?
1. 3 answers
2. asked by drea
3. 479 views
show that sin3theta-cos2theta =(1-sin theta)(4sin squared theta + 2sin theta -1)
1. 1 answer
2. asked by victor2
3. 478 views
Given that ΔHof of copper (II) chloride, CuCl2(s), is –220.1/kJ and ΔHof of copper (I) chloride, CuCl(s), is –137.2 kJ,
1. 1 answer
2. asked by tom
3. 476 views
Please check these too. thanksSimplify 6[86-(94-86)]= my answer is 468 2. On three consecutive passes, a football team gains 6
1. 2 answers
2. asked by babs
3. 476 views
I need to prepare different grammar tests. I really hope you can see if everything is OK.1) Ask for the information in the bold
1. 1 answer
2. asked by Henry
3. 473 views
determine your distance traveled and displacement if you walk 100m forward and then 35m backward
1. 1 answer
2. asked by stacey
3. 473 views
Describe what SARA is and explain how it is used in fighting crimes. In what type of policing model is SARA most effectively
1. 4 answers
2. asked by CHASE
3. 470 views
Which number is equivalent to -7 1/3 ?
1. 1 answer
2. asked by drea
3. 460 views
When Pal throws his beach ball straight up in the air, it's height h at time tis given by h=(-1/2)gt^2+v(sub 0). Find the
1. 1 answer
2. asked by Jordan
3. 460 views
7(ac + 2b) + 2ac
1. 1 answer
2. asked by Anonymous
3. 455 views
A building has 7 storeys. If the interior length is 41 m and the width is 32 m, What is the total floor space in the building
1. 1 answer
2. asked by Rona
3. 451 views
How does the identification of cultural universals impact our understanding of what it means to be human?
1. 1 answer
2. asked by Victor
3. 449 views
At a flea market, 5 out of twelve vendors are selling antiques. What is the decimal equivalent of 5/12
1. 7 answers
2. asked by anonymous
3. 446 views
There are a total of 107 chickens and rabbits on a farm. The total number of legs of rabbits is 56 more than the total number of
1. 1 answer
2. asked by James
3. 446 views
factorize (x^2-4x)(x^2-4x-1)-20
1. 1 answer
2. asked by pavatharani
3. 437 views
what is negative three point two as a mixed number in simplest form.
1. 1 answer
2. asked by drea
3. 435 views
would the answer to 8x-(4x+4)=20 would that be 6 then? I posted it wrong before thank you for helping
1. 1 answer
2. asked by babs
3. 434 views
Calculate the fixed cost, variable costs, and break-even point for the program suggested in Appendix D. BASED ON THE ASSIGNMENT
1. 1 answer
2. asked by Isabella
3. 430 views
What are the maximum values of the following when an incandescent 55-W light bulb (at 110 V) is connected to a wall plug labeled
1. 1 answer
2. asked by Sophia
3. 427 views

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