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2010
April

Questions Asked on April 18, 2010

Calculate the amount of energy in kilojoules needed to change 225 g of water ice at -10 C to steam at 125 C. The following
1. 3 answers
2. asked by Eddie
3. 7,017 views
Write and balance the chemical reaction when gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH4) &
1. 3 answers
2. asked by Tracey
3. 4,127 views
What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below?Al(s)|Al3+(aq)||N
1. 3 answers
2. asked by Bab aba
3. 3,638 views
Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the
1. 1 answer
2. asked by Anonymous
3. 3,173 views
Calculate the standard cell potential for each of the following electrochemical cells.Ni^+2(aq)+Mg(s)--->Ni(s)+Mg^+2(aq) I used
1. 3 answers
2. asked by Eddie
3. 2,957 views
How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu2+ ions to produce 3.00
1. 3 answers
2. asked by Bab aba
3. 2,349 views
Calculate the solubility (in g/L) of silver carbonate in water at 25°C if the Ksp for Ag2CO3 is 8.4 x 10^-12
1. 2 answers
2. asked by Bababa
3. 2,244 views
If the stockroom fails to dry the KHP to remove the waters of hydration, the student's calculated concentrationfor the
1. 1 answer
2. asked by help
3. 2,188 views
Find the angle formed when [3, 4] and [−5, 12] are placed tail-to-tail, then find components for the vector projection that
1. 2 answers
2. asked by John
3. 2,036 views
If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
1. 1 answer
2. asked by Anonymous
3. 2,012 views
This is regarding direct variation.y varies directly as the square of R. If y = 128 when R = 8, find y when R = 5. Another one I
1. 2 answers
2. asked by Mike
3. 1,975 views
A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as
1. 1 answer
2. asked by yusra
3. 1,920 views
If wind blows at 30 m/s over a house, what is the net force on the roof if its area is 300 m^2 and is flat?
1. 3 answers
2. asked by Anonymous
3. 1,919 views
Find the probability of at least one birthday match among a group of 48 people.
1. 1 answer
2. asked by Kimberly
3. 1,882 views
the lions gate bridge in vancuver BC, is a suspension bridge that spans 1516m. Large cables are attached to the tops of the
1. 1 answer
2. asked by Navroz
3. 1,861 views
How do I solve these?1) 2sinxcosx-cosx=0 2) cos^2(x)-0.5cosx=0 3) 6sin^2(x)-5sinx+1=0 4) tan^2(x)+tanx-12=0
1. 2 answers
2. asked by .
3. 1,845 views
a bullet of mass 20g traveling horizontally at 100m/s embedded itself in the center of block of wood mass 1kg which is suspended
1. 2 answers
2. asked by la roux
3. 1,832 views
Saturated solutions of each of the following compounds are made at 20 degree Celsius. Which of the solutions will form a
1. 1 answer
2. asked by Anonymous
3. 1,763 views
I am having to graph this linear equation. y=-2x+4This is what I know. The y-intercept is 4 and the slope is -2. So I would
1. 2 answers
2. asked by Carrie
3. 1,695 views
Sam and Susie are twins. Sam has as many brothers as he has sisters. Suzie has at least 1 sister, and twice as many brothers as
1. 3 answers
2. asked by Nina
3. 1,669 views
Consider the evaporation of methanol at 25.0 C:CH3OH(l)--->CH3OH(g) Delta G= 4.3 kJ Find Delta G at 25.0 C under the following
1. 1 answer
2. asked by Kyle
3. 1,622 views
A job has a normal time of 12 minutes a performance rating of .80, and an allownmce factor of 20 percent of job time. The
1. 1 answer
2. asked by Anonymous
3. 1,527 views
An object attached to the end of a string swings in a vertical circle (R = 1.2 m), as shown. At an instant when ƒá = 30„a,
1. 1 answer
2. asked by yusra
3. 1,492 views
Its center at O = (0, 0), the unit circle x2 + y2 = 1 goes through P = (1, 0). The line y = 0.6 intersects the circle at A and
1. 1 answer
2. asked by sarah
3. 1,458 views
Sam and Susie are twins. Sam has as many brothers as he has sisters. Suzie has at least 1 sister, and twice as many brothers as
1. 1 answer
2. asked by Nina
3. 1,453 views
Quadratic Function problem:When a certain drug is taken orally, the concentration of the drug in the patients bloodstream after
1. 3 answers
2. asked by Meredith
3. 1,402 views
A spherical balloon has a radius of 6.76 m and is filled with helium. How large a cargo can it lift, assuming that the skin and
1. 1 answer
2. asked by Anonymous
3. 1,381 views
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they
1. 0 answers
2. asked by william
3. 1,324 views
If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 32 ft/sec, its height after t seconds
1. 1 answer
2. asked by Adam
3. 1,319 views
A point in polar coordinates is given, Find the corresponding rectangular coordinates for the point.(r,Q) = (4, 3pi/2) I know
1. 2 answers
2. asked by Abbey(Please help)
3. 1,315 views
A 50 g ball of clay traveling east at 3.5 m/s collides and sticks together with a 50 g ball of clay traveling north at 2.0 m/s.
1. 1 answer
2. asked by Sandra
3. 1,288 views
identify the six groups or individuals fredrick jackson turner ommitted from his thesis regarding the frontier experience in
1. 2 answers
2. asked by cliff
3. 1,268 views
A venturi tube is measuring the flow of water; it has a main diameter of 4.1 cm tapering down to a throat diameter of 1.8 cm. If
1. 0 answers
2. asked by Anonymous
3. 1,240 views
what is plain folks, name calling, bandwagon, testimonial,and loaded terms.thank you and aply fast.
1. 4 answers
2. asked by marinda
3. 1,206 views
On th decibel scale, the loudness of a sound, in decibels, is given byD=10log(I/I0), where I is the intensity of a sound barely
1. 0 answers
2. asked by Help!!
3. 1,201 views
A potter's wheel having a radius 0.55 m and a moment of inertia 11.6 kg·m2 is rotating freely at 55 rev/min. The potter can
1. 1 answer
2. asked by Kelsey
3. 1,195 views
1. What are expansion joints, and why are they used?
1. 1 answer
2. asked by Anonymous
3. 1,160 views
determine which real number corresponds to the situation.The record high temperature for a date is 97.9 degrees above 0. what is
1. 1 answer
2. asked by marilyn
3. 1,147 views
3. Draw vectors u and v tail-to-tail so that they make a è-degree angle. Draw the vector u − v, the third side of the
1. 0 answers
2. asked by sarah
3. 1,143 views
On a square gameboard that is divided into n rows of n squares each, k of these squares lie along the boundary of the gameboard.
1. 2 answers
2. asked by john
3. 1,135 views
I cannot understand the difference between a direct and indirect object pronoun in spanish. It has been bothering me that I
1. 3 answers
2. asked by Ari
3. 1,114 views
Multiply. Use the partial-products algorithm.87 x 65 Not sure how to use the partial-product algorithm.
1. 2 answers
2. asked by Jake
3. 1,108 views
An electrochemical cell is based on the following two half-reactions:Ox: Sn(s)--> Sn^2+(aq, 1.70 M)+ 2e Red: ClO2(g, 0.220
1. 1 answer
2. asked by Kyle
3. 1,086 views
How many types of kitchen do we have in Home Economics
1. 3 answers
2. asked by Godswill
3. 1,086 views
a basketball player is trying to make a half-court ump shot and releases the ball at the height of the basket. assuming that the
1. 1 answer
2. asked by JJ
3. 1,073 views
The Rebecca Company acquired merchandise inventory costing $10,000 on September 1. The company will not pay for the inventory
1. 0 answers
2. asked by Pat
3. 1,067 views
An 85.0-N backpack is hung from the middle of an aluminum wire, as the drawing shows. The temperature of the wire then drops by
1. 2 answers
2. asked by zuta
3. 1,040 views
Calculate the hydrogen ion concentration of a 3.55×10-4 M solution of the strong base KOH. Round your answer to 3 significant
1. 1 answer
2. asked by kathy
3. 1,033 views
A large chandelier weighing 1500lbs. is suspended from the roof of a theater lobby. The steel pipe from which it hangs is 20ft
1. 1 answer
2. asked by stacey graham
3. 1,026 views
1. Wanted: Man to take care of cow that does not smoke or drink.”2. “What looks better on a handsome man than a tux?
1. 2 answers
2. asked by ang
3. 1,024 views
A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is:Zn(s) +
1. 0 answers
2. asked by Juggy
3. 1,018 views
Sorry, another question.A camper van with a mass of 2500kg has a maximum driving force of 2650N. The camper van drives along a
1. 1 answer
2. asked by Eloise
3. 1,011 views
. Remox Corporation is a British firm that sells high-fashion sportswear in the United States. Congress is currently considering
1. 1 answer
2. asked by JO
3. 1,003 views
Need help with these 3, with work shown please---30. A block of ice loses one-third of its weight every hour. After 2 hours, the
1. 4 answers
2. asked by mysterychicken
3. 996 views
A stairwell is supported by two circular steel rods at one end. The other end supported above. The two steel rods are subjected
1. 0 answers
2. asked by stacey graham
3. 979 views
A 4 kg object is attached to a vertical rod by two strings, as in the figure. The object rotates in a horizontal circle at
1. 2 answers
2. asked by yusra
3. 965 views
Test for symmetry with respect to Q=pi/2 , the polar axis and the pole.r = 16 cos3Q Please explain. I do not know how to do
1. 1 answer
2. asked by Abbey
3. 959 views
A helicopter hovering above a forest fire dumps a large bucket of water. How far does the water fall during the third season?
1. 1 answer
2. asked by bob
3. 959 views
An airplane travels 80 m/s as it makes a horizontal circular turn which has a 0.8 km radius. What is the magnitude of the
1. 0 answers
2. asked by yusra
3. 946 views
Please help me... :(There is a moving bowling ball on the track. A student says, "After the ball is thrown horizontally on the
1. 2 answers
2. asked by Eddy
3. 933 views
If 2 g of salicylic acid is heated with 4 g of acetic anhydride, what is the theoretical yield ?C7H6O3 + C4H6O3 --> C9H8O4 +
1. 1 answer
2. asked by Fiona
3. 921 views
Solve.The population of a particular country was 29 million in 1980; in 1989, it was 36 million. The exponential growth function
1. 3 answers
2. asked by Anonymous
3. 916 views
When a certain drug is taken orally, the concentration of the drug in the patients bloodstream after t minutes is given by
1. 1 answer
2. asked by Meredith
3. 907 views
Use front-end estimation to find the value of the expression. I do not understand (without adjustment)687 - 239 (without
1. 5 answers
2. asked by Bart
3. 901 views
What Government imposed barriers to stop or hinder the export of automobiles?
1. 1 answer
2. asked by HelloKitty
3. 898 views
What were the massachusetts fighting for?
1. 2 answers
2. asked by PRINCESS
3. 890 views
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7
1. 1 answer
2. asked by cynthia
3. 883 views
Laura invested her savings in two investment funds. The that she invested in Fund A returned a profit. The amount that she
1. 1 answer
2. asked by Jason
3. 881 views
Write an equation of the line satisfying the given conditions.Parallel to the line y=-5x-6 and a y-intercept of -2. Would it be:
1. 2 answers
2. asked by Carrie
3. 878 views
identify 1 enviromental or human factor that causes ill health,accident,crises within south africa
1. 6 answers
2. asked by loyd
3. 874 views
Figure 10-35a shows a disk that can rotate about an axis at a radial distance h from the center of the disk. Figure 10-35b gives
1. 0 answers
2. asked by andy
3. 865 views
I need to create a sentence to tell the following people's opinions.Tu / que / es aburrido(a) Yo / Que / es emocionante
1. 1 answer
2. asked by Leah
3. 856 views
0.1276 of a monoprotic acid (molar mass 110g/mol) was dissolved in 25ml of water.The pH of the solution was found to be 5.87
1. 1 answer
2. asked by tete
3. 853 views
Hi! could any help me please, thank you.1.An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A
1. 0 answers
2. asked by Chan
3. 846 views
the line passing through (7,y) and (1,0) is parallel to the joining line (4,4) and (-2,1) find y
1. 1 answer
2. asked by Anonymous
3. 844 views
E4-1 The trial balance columns of the worksheet for Briscoe Company at June 30, 2008, are asfollows. BRISCOE COMPANY Worksheet
1. 1 answer
2. asked by trinity
3. 835 views
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P.(a) Find the
1. 0 answers
2. asked by Sarah
3. 822 views
Suppose you play a game in which two fair standard dice are rolled. If the numbers showing on the dice are different, you lose
1. 1 answer
2. asked by Hannah
3. 813 views
A spacecraft launches a probe at a constant speed. A day later, the probe returns at the same speed. Did the probe have to burn
1. 4 answers
2. asked by Eloise
3. 813 views
jesse buys a 150 000 house and will make a 30 000 down payment the bank will charge him an interest rate of 5% with the mortgage
1. 1 answer
2. asked by jodi jerome
3. 799 views
You have a triangle that measures 180 degrees. AB is 4 units. the measure of BC is 5 units. The measure of CD is 12 units. What
1. 4 answers
2. asked by Rachael
3. 788 views
What is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97atm and a temperature of 32 degrees celius? R=0.0821
1. 1 answer
2. asked by Tracey
3. 778 views
Frank stands at the base of a building. He throws a 0.12kg rock straight up at a speed of 28m/s so that it rises to a maximum
1. 1 answer
2. asked by NINI
3. 776 views
Does (-2)^7 = -2^7
1. 1 answer
2. asked by Bart
3. 759 views
Feedback inhibition means that an increase in a substance will what?
1. 2 answers
2. asked by Haley
3. 759 views
I don't understand "What is the Third Estate?" by Abbe Sieyes. I am supposed to answer some questions on it, but i don't know
1. 0 answers
2. asked by blue
3. 747 views
explain and describe Newton's 1st law and as it applies to forces, balanced forces and unbalanced forces
1. 1 answer
2. asked by Brandon
3. 745 views
In a physics experiment, Wendy immersed a copper of mass 300g in 100 degree C in boiling water and left it there for several
1. 1 answer
2. asked by Samantha Chow
3. 739 views
WHich of the following systems will the endocrine system use to send any of it messaqges?THe circulatory The immune The
1. 1 answer
2. asked by Haley
3. 733 views
What must be the pressure difference between the two ends of a 1.4 km section of pipe, 22 cm in diameter, if it is to transport
1. 0 answers
2. asked by Anonymous
3. 733 views
Calculate the molar mass of baking powder (NH4)2CO3
1. 1 answer
2. asked by Tracey
3. 729 views
Find moment of Inertia Ix and Iy for the built up steel beam. The 1"x32"plate is centered on the wide flange web together with
1. 0 answers
2. asked by stacey graham
3. 724 views
how does carbon move from the atmosphere to the biosphere
1. 1 answer
2. asked by Livie
3. 719 views
An auditorium has 30 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many
1. 1 answer
2. asked by mary
3. 716 views
how would you answer this question with affirmative commands and a direst object pronoun?Leo el libro de la historia de Oaxaca?
1. 1 answer
2. asked by Leah
3. 709 views
i am on windows media player tryin to make a mix cd. i made a playlist but i wanna cut some parts into smaller pieces like if i
1. 1 answer
2. asked by becca
3. 709 views
a room is 18 feet long and 14 feet wide with walls 10 feet high. If one can of paint covers 450 square feet, how many cans of
1. 1 answer
2. asked by Ana
3. 707 views
Why is demand history irrelevant for the management of raw materials and work-in-process inventories?
1. 1 answer
2. asked by Jeniffer
3. 689 views
Mammals that depend on being able to run fast have slender lower legs with flesh and muscle concentrated high, close to the
1. 0 answers
2. asked by Ava
3. 687 views
The endocrine system..A- affects only the reproductive system B- releases substances into the bloodstream C- competes with the
1. 1 answer
2. asked by Taylor
3. 687 views

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