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Questions Asked on November 14, 2011

A stone is dropped from the upper observation deck of a tower, 200 m above the ground. (Assume g = 9.8 m/s^2.)a)Find the
1. 2 answers
2. asked by John
3. 15,717 views
a boat leaves a dock at 2:00 pm and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h
1. 4 answers
2. asked by LALA
3. 15,419 views
a pet truck is moving at 25m/s north, a dog inside moves at 1.75 m/s at angle 35 degrees east of north. What is the velocity of
1. 3 answers
2. asked by anna
3. 10,893 views
Consider the combustion of propane:C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes
1. 3 answers
2. asked by Shellby
3. 8,746 views
A 100g sample of water at 90 degrees celsius is added to a 100g sample of water at 10 degrees celsius.The final temperature of
1. 2 answers
2. asked by Shellby
3. 6,374 views
A student initially at rest on a frictionless frozen pond throws a 1 kg hammer in one direction. After the throw the hammer
1. 1 answer
2. asked by Mae
3. 6,080 views
A rectangle with its base on the x-axis is to be inscribed under the graph of y=2-x^2. Find the height of the rectangle if the
1. 1 answer
2. asked by Sarah
3. 5,359 views
A 1.6 air bubble is released from the sandy bottom of a warm, shallow sea, where the gauge pressure is 1.6 . The bubble rises
1. 4 answers
2. asked by Anonymous
3. 4,704 views
Find the angle that maximizes the area of the isosceles triangle whose legs have length l=31angle=
1. 4 answers
2. asked by saud
3. 4,581 views
A sample of C3H8O that contains 200. molecules contains ________ carbon atoms.
1. 2 answers
2. asked by Matt
3. 4,440 views
A 13-foot ladder is leaning against a vertical wall. If the bottom of the ladder is being pulled away at a rate of 2 feet per
1. 3 answers
2. asked by Maria
3. 4,220 views
The illumination of an object by a light source is directly proportional to the strength of the source and inversely
1. 1 answer
2. asked by Samantha
3. 3,714 views
At time t >or= to 0, the position of a particle moving along the x-axis is given by x(t)= (t^3/3)+2t+2. For what value of t in
1. 2 answers
2. asked by Millie
3. 3,613 views
The Lewis dot diagram for iodite (IO2-) is given below. Using your VSEPR information, determine the most likely molecular
1. 3 answers
2. asked by Anonymous
3. 3,368 views
The earth rotates on its axis once every 24 hours.How long does it take Earth to rotate through an angle of 4(pi)/3?
1. 4 answers
2. asked by Rebecca
3. 3,259 views
What is the molecular geometry (shape) if you have 3 single bonds and 1 lone pair around the central atom?
1. 1 answer
2. asked by Angela
3. 3,022 views
A stone is dropped from the edge of a roof, and hits the ground with a velocity of -195 feet per second. How high is the roof? .
1. 1 answer
2. asked by Anonymous
3. 2,975 views
Which of the following quantum numbers describes the shape of an orbital?A) principle quantum number (n) B) magnetic quantum
1. 2 answers
2. asked by Teresa
3. 2,743 views
A sample of Argon gas at standard pressure occupies 1000 mL. At constant temperature, what volume does the gas occupy if the
1. 3 answers
2. asked by Jessie
3. 2,698 views
for the polynomial shown below, find f(-1).f(x)=3x^4-x^3+4x-2
1. 2 answers
2. asked by Anna
3. 2,664 views
How many grams of C4H10O can be melted by 2.0 x 103 J?Given ÄHfus = 7.27 kJ/mol
1. 2 answers
2. asked by Frank
3. 2,627 views
An energy-efficient lightbulb, taking in 25.0 W of power, can produce the same level of brightness as a conventional bulb
1. 1 answer
2. asked by carlton
3. 2,612 views
Which of the two is the stronger base?Give your reason.(a) HPO4 2- or PO4 3- (b)HS- or S2-
1. 1 answer
2. asked by Dewa
3. 2,581 views
Fill in the blank with the correct conjugation of the verb in parentheses.¿(Trabajar) __________ tú por la tarde? When
1. 5 answers
2. asked by Darius
3. 2,546 views
A heavy-duty stapling gun uses a 0.162-kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff
1. 1 answer
2. asked by Leah
3. 2,207 views
the difference between 2 numbers is 40? they are in the ratio9:7. What are the numbers ?
1. 1 answer
2. asked by renoir john
3. 2,148 views
A process began the month with 3,000 units in the beginning work in process inventory and ended the month with 2,000 units in
1. 2 answers
2. asked by MAVIS
3. 2,125 views
(a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in
1. 3 answers
2. asked by Amber
3. 2,103 views
An estimation of the radius of a lead atom:a. You are given a cube of lead that is 1.000 em on each side. The density of lead is
1. 2 answers
2. asked by Arnol
3. 2,062 views
A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus the diameter of the semicircle is equal to the
1. 2 answers
2. asked by Ashleigh
3. 1,989 views
Solve the equation in the given domaincos 4x + cos 2x = 0, 0<(or equal to) x < pi
1. 2 answers
2. asked by Mark
3. 1,944 views
What is the rhyme scheme of "Great Glorious Gobs"?A. ABAB B. BBBA C. AABB D. AABA
1. 24 answers
2. asked by Bob
3. 1,911 views
a force of 20 n is applied to a 10 kg mass on a level frictionless surface what is the acceleration of the mass?
1. 1 answer
2. asked by irene
3. 1,770 views
The heat capacity of liquid water is 4.18 J/g·°C and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat must
1. 2 answers
2. asked by Sue
3. 1,768 views
A ball moving at +3.0 m/s along a table rolls off a table and lands on the ground 2.0 m away. How high was the table?
1. 1 answer
2. asked by Cali
3. 1,755 views
Which line in the poem contains an example of onomatopoeia?A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget
1. 2 answers
2. asked by Bob
3. 1,747 views
A plane has an airspeed of 200 m/s due north and is subject to a westerly wind of 50 m/s. What is the planes speed relative to
1. 1 answer
2. asked by Anonymous
3. 1,620 views
A 23.596 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 79.504 g of
1. 2 answers
2. asked by Mike
3. 1,593 views
If solution A had a pH of 8, and solution B had 1,000 times this hydrogen ion concentration what would be the pH of solution B,
1. 1 answer
2. asked by Kristin
3. 1,545 views
Which line in the poem contains an example of onomatopoeia?A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget
1. 4 answers
2. asked by Bob
3. 1,523 views
The value of delta H for the reaction of 2Na2O2(s) + 2H20(l)----> 4NaOH(s)+O2(g) is -126KJ When 2.0 moles of NaOH is formed?
1. 3 answers
2. asked by Linda
3. 1,520 views
Consider the combustion of propane:C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes
1. 1 answer
2. asked by Shellby
3. 1,500 views
What is the weakness of the Bronsted-Lowry acids and bases theory?
1. 1 answer
2. asked by Dewa
3. 1,497 views
Tyler buys a stereo system for $1200, and pays for it using a credit card. This particular card charges 1.5 percent monthly
1. 2 answers
2. asked by Danielle
3. 1,475 views
Given a normal distribution of scores with a mean of 100 and a SD of 10, compute z scores for the following raw valves: 95, 115,
1. 1 answer
2. asked by Anonymous
3. 1,441 views
A planet orbits its star in a circular orbit (uniform circular motion) of radius 1.62x10^11 m. The orbital period of the planet
1. 1 answer
2. asked by sand
3. 1,431 views
Calculate the pH at the equivalence point for the titration of 0.120 M methylamine with 0.120 M HCl (kb of methyalamine is 5.0 x
1. 1 answer
2. asked by Mariana
3. 1,333 views
Calculate the density of the balls in this area. Each ball has a mass of 1 kg.Estimate the area taken up by the whole structure
1. 0 answers
2. asked by KAy
3. 1,315 views
I urgently need you to revise these sentences (instructions), please.1)Explain to a friend of yours who has never flown what
1. 1 answer
2. asked by Henry2
3. 1,303 views
A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is
1. 1 answer
2. asked by carlton
3. 1,302 views
Please try to be clear in your explanation!!A swimmer bounces straight up from a diving board and falls feet first into a pool.
1. 2 answers
2. asked by Lindsey
3. 1,288 views
What is the trend in atomic size in the series of Group IIA elements Be through Ra?
1. 1 answer
2. asked by Tom
3. 1,285 views
A tanker is spilling oil into the water resulting in an oil slick that is close to circular. At te time that the slick's
1. 1 answer
2. asked by Sarah
3. 1,269 views
Thank you very much. Could you please check these sentences, too?1) Explain to a friend of yours who has never flown what he/she
1. 1 answer
2. asked by Henry2
3. 1,267 views
For the following reaction:Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4 How many moles of Na2SO4 can be made with 3.2 moles of NaOH
1. 1 answer
2. asked by Carrie
3. 1,263 views
What is the function of each of the following reagents in this experiment: phosphoric acid; anhydroussodium sulfate; sodium
1. 1 answer
2. asked by Anonymous
3. 1,261 views
Without using calculator,evaluate Sin15 deg,Cos 15 deg,Sin 75deg. O need the answer urgently pls.
1. 1 answer
2. asked by Prince
3. 1,258 views
A 23.596 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 79.504 g of
1. 1 answer
2. asked by Mike
3. 1,234 views
Find the instantaneous rate of change of r with respect to theta for r = (theta/2)- (1/theta).
1. 1 answer
2. asked by Emma
3. 1,223 views
A sample of H2 with a volume of 35.0 L at STP is reacted with excess O2 to produce H2O. How many grams of H2O are produced?2 H2
1. 1 answer
2. asked by Anonymous
3. 1,221 views
Persuasive speeches focus on forcing the audience to change the way it thinks and feels.TRUE OR FALSE I just wanted to double
1. 3 answers
2. asked by Michelle
3. 1,218 views
i am writing a paper for English the question is what ethical problems may rise in research on humans?List and describe the
1. 0 answers
2. asked by maria
3. 1,217 views
the grade of a road is its slope given as a percent. for example, a road with a 6% grade has a slope 6/100. it rises 6 feet for
1. 3 answers
2. asked by manal HELP ME
3. 1,213 views
C15H30 is a hydrocarbon that reacts with oxygen gas to give carbon dioxide and water.Calculate the mass of water (grams) formed
1. 3 answers
2. asked by Kim
3. 1,209 views
Is this a good paragraph with correct grammar? The Grilled Cheese Memorial and Museum is an interesting and educational place to
1. 4 answers
2. asked by dakota
3. 1,206 views
Consider the following data:* NH3(g) yields 1/2 N2(g) + 3/2 H2(g) delta H = 46kJ * 2 H2(g) + O2(g) yields 2 H2o(g) delta H =
1. 1 answer
2. asked by Shellby
3. 1,195 views
The distance between the Earth and Mars when the two panets are at opposition varies greatly because of the large eccentricity
1. 3 answers
2. asked by Sara
3. 1,194 views
I have two questions--1.What is the population of a town after 6 years if it is increasing annually by 3.5%. The population is
1. 2 answers
2. asked by Trisha
3. 1,189 views
A 4-inch-thick concrete slab is being poured for a circular patio 10 feet in diameter. Concrete costs $50 per cubic yard. Find
1. 1 answer
2. asked by christy
3. 1,180 views
I urgently need you to revise the following sentences I have to include in an email.1) Thank you for answering my last email and
1. 1 answer
2. asked by Henry2
3. 1,161 views
how do i write a thesis statement ? Like teachers always say "What's the Big Idea" or "Universal Idea" and I always think I have
1. 1 answer
2. asked by LayDeee_B
3. 1,158 views
hi, reading over momentum notes and i just want to clarify a few things.if i had a system containing a cart that was moving
1. 0 answers
2. asked by dave
3. 1,156 views
I am trying to look for 20 lines of blank verse in shakespeare's play Measure for Measure.I found this: we CANnot WEIGH our
1. 0 answers
2. asked by Jasmin
3. 1,151 views
what's the slope of the roof on adobe house?why might a roof in connecticut be steeper than a roof in the desert?
1. 1 answer
2. asked by manal HELP ME
3. 1,149 views
A man 6ft. tall walks at the rate of 5 ft/sec toward a streelight that is 16 ft. above the ground. At what rate is the length of
1. 1 answer
2. asked by Sarah
3. 1,138 views
3.5g of CuCl2.2H2O were dissolved and reacted with excess Na2SO3 in the presence of HCl. After filtration, 1.5g of CuCl crystals
1. 2 answers
2. asked by Shannon
3. 1,135 views
What is the angular momentum (in kg*m*m/s) of a 790 gram symmetrical rotating bar which is 2.85 m long and spinning at 245 rpm
1. 2 answers
2. asked by dan
3. 1,104 views
Could you please check these sentences, too?1) To begin with, I’ll have potato soup. I couldn’t help laughing. 2) I’m
1. 1 answer
2. asked by Henry2
3. 1,093 views
When dissecting a fetal pig, how can you tell the difference between veins and arteries? I remember someone saying something
1. 0 answers
2. asked by Teddy
3. 1,078 views
You are eating soup from a hemispherical bowl of radius 6cm at a constant rate of 40ml/min. Find the rate at which the soup
1. 2 answers
2. asked by A
3. 1,074 views
Based on its degree, what kind of polynomial is this?h(x)=-x^2+2x-5
1. 1 answer
2. asked by Anna
3. 1,060 views
A sample of gas at 80°C is cooled by 30 degrees until its final volume is 1.75 L. If the pressure remains constant, what was
1. 3 answers
2. asked by mary
3. 1,056 views
Ionic bonding typically occurs when a ______________ bonds with a ______________
1. 3 answers
2. asked by Help
3. 1,049 views
The Beaufort Sea touches what two North American countries? Canada and the United States2. Are there any states located south of
1. 1 answer
2. asked by Reed
3. 1,043 views
Lalph Rauren was famous for discovering potential models as he walked the streets of New York. One day he spotted four girls who
1. 0 answers
2. asked by Julie
3. 1,019 views
V=4/3 pi r ^3 is the formula for the volume of a sphere. Find dV for a sphere if the radius of 10" is increased by .1"Please
1. 1 answer
2. asked by Michael
3. 1,010 views
You work at a grocery store. You hourly rate is greater after 6:00p.m. than it is during the day. One week you work 20 daytime
1. 1 answer
2. asked by Lynn
3. 993 views
A student took a 25 question true and false test answering the question randomly without reading. If a score of 18 is correct is
1. 2 answers
2. asked by brian
3. 993 views
How far from the center of the Earth (in km) is the center of mass of the Earth + satellite system if the satellite has a mass
1. 0 answers
2. asked by Me
3. 992 views
A 36 cm diameter wheel accelerates uniformly about its center from 150 rpm to 360 rpm in 3.6 s. Determine the radial component
1. 0 answers
2. asked by David colon
3. 970 views
Your task is to design a rectangular industrial warehouse consisting of three separate spaces of equal size.?The wall materials
1. 0 answers
2. asked by saud
3. 963 views
At an average opposition, the Earth and Mars are separated by 0.52 AU. Suppose an astronomer observes Mars at opposition and
1. 1 answer
2. asked by Matt
3. 959 views
the property restoration company is considering switching to new degumidifiers. Their market research, considering the cost of
1. 0 answers
2. asked by boopathy
3. 958 views
A 4.90 kg particle moves along the x axis. Its position varies with time according to x = t + 3.4t3, where x is in meters and t
1. 1 answer
2. asked by carlton
3. 954 views
Are there any tutors on here that are familiar with The Canterbury Tales?
1. 1 answer
2. asked by Josh
3. 954 views
Materials costs of $300,000 and conversion costs of $321,300 were charged to a processing department in the month of September.
1. 2 answers
2. asked by MAVIS
3. 948 views
If the average rate of change of g(x) from x = 1 to x = 9 is 20, and if the average rate of change of g(x) from x = 9 to x = 21
1. 2 answers
2. asked by Brianna
3. 938 views
1.Write two equivalent ratios for the given ratio.a. 4/12 b. 11/33 SHOW WORK
1. 1 answer
2. asked by kelly
3. 919 views
The teacher should take attendance every day.Verb phrase is should take. IS this a linking or action verb and why?
1. 1 answer
2. asked by Kelley
3. 919 views
Recently, there has been much concern about pollution in the home from radon, aradioactive gas whose elemental molar mass is 222
1. 3 answers
2. asked by Arnol
3. 916 views

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