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Questions Asked on February 21, 2010

You throw a 20-N rock vertically into the air from ground level. You observe that when it is 15.0 m above the ground, it is
1. 3 answers
2. asked by anton
3. 29,375 views
Two people are pulling a boat through the water as in Figure P4.20. Each exerts a force of 600 N directed at a θ = 45.0° angle
1. 2 answers
2. asked by nat
3. 5,034 views
How many milliliters of glycerol, d=1.26 g/ml, must be added per kilogram of water to produce a solution with 4.55 mol% C3H8O3 ?
1. 8 answers
2. asked by sab
3. 3,654 views
use a(t) = -32 ft per second squared as the acceleration due to gravity.An object is thrown vertically downward from the top of
1. 1 answer
2. asked by sammi
3. 3,330 views
In right triangle ABC, altitude CD is drawn to hypotenuse AB. If AD equals 4 and AC exceeds DB by 1, find DB.It is from a
1. 2 answers
2. asked by Emily
3. 2,594 views
How many carbon atoms are there in 150.0 g Glucose? (Glucose is C6H12O6, molar mass = 180.16 g/mol)
1. 1 answer
2. asked by Jack
3. 2,380 views
Hello, would anyone be willing to check my answers to the following questions?1. Identify the poetic element used in the
1. 3 answers
2. asked by Tamir
3. 2,337 views
find the number of integers between 32 and 395 that are divisible by 6find their sum
1. 2 answers
2. asked by sarah
3. 2,324 views
4.80-kg watermelon is dropped (zero initial speed) from the roof of a 25.0-m-tall building. a) Calculate the work done by
1. 1 answer
2. asked by anton
3. 2,207 views
A piston has a diemaeter of .64 cm. A second piston has a diameter of 3.8 cm. determine the Force necessary on Piston A to
1. 1 answer
2. asked by Harper
3. 1,995 views
a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte.a
1. 1 answer
2. asked by LALA
3. 1,946 views
A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited
1. 1 answer
2. asked by Ben
3. 1,904 views
which dam must be stronger, one that hold back 100000 m^3 of water 10 meters deep or one that holds back 1000 m^3 of water 20
1. 6 answers
2. asked by Hale
3. 1,825 views
There are two horizontal forces on the 2.0 kg box in the overhead view of Fig. 5-39 but only one (of magnitude F1 = 20 N) is
1. 3 answers
2. asked by beav
3. 1,631 views
Assume that the probability is 1/2 that a baby born is a boy. If a couple has two children, what is the probability that both
1. 3 answers
2. asked by Lyndse
3. 1,598 views
The sentences are: "Es un profesor muy bueno y un buen padre." and "Su padre es médico y es un gran hombre." Why is bueno used
1. 3 answers
2. asked by Mary
3. 1,577 views
Tarzan, who weighs 820 N, swings from a cliff at the end of a 20.0 m vine that hangs from a high tree limb and initially makes
1. 1 answer
2. asked by Anonymous
3. 1,494 views
Quien es el chico?
1. 5 answers
2. asked by chrissy
3. 1,463 views
What is the density of PCl5 gas at STP?
1. 1 answer
2. asked by Anonymous
3. 1,309 views
Boiling Lake is a small lake on the island of Dominica. The water temperature of the lake is between 180*F and 197*F. Write a
1. 3 answers
2. asked by hope
3. 1,305 views
please use the following terms in the same sentence- invertebrate, vertebrate and placenta. Thank you
1. 1 answer
2. asked by spencer
3. 1,263 views
Could someone help me draw these vectors? These things confuse me.A force of 42 newtons acting on an object at an angle of 53
1. 0 answers
2. asked by Jim
3. 1,259 views
State the negation of the following statement:It is cloudy.
1. 3 answers
2. asked by miranda
3. 1,225 views
While pulling a stalled car, a tow truck's cable makes an angle of 50 degrees above the road. If the tension on the tow truck's
1. 1 answer
2. asked by Christa
3. 1,224 views
Solve the linear equation using any technique you have learned. Name the technique. Check.3x + 12 = -7x - 28 I know the answer
1. 2 answers
2. asked by lovey
3. 1,193 views
Roughly speaking, the standard deviation indicates how far, on average, the observations are from the mean. Do you think that
1. 2 answers
2. asked by Lyndse
3. 1,181 views
i know some things about ice hockey i know that it is canada's national game and is a significant addition to world sport. It is
1. 8 answers
2. asked by Anonymous
3. 1,175 views
What does "Mi prima Susana y so novio no tienen hasta los ocho porque ella tiene/ viene que trabajar." mean and which word is
1. 6 answers
2. asked by Mary
3. 1,165 views
Sorbic acid, HC6H702 (pKa=4.77), is widely used in the food industry as a preservative. For example, its potassium salt
1. 1 answer
2. asked by Rav
3. 1,163 views
A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability of
1. 11 answers
2. asked by Lyndse
3. 1,133 views
In the movie Mulan, why was it a crime for a woman to enlist in a army?
1. 1 answer
2. asked by Keyah reed
3. 1,131 views
The spring constant can be determined from the oscillatory motion. For this case, Newton's second law gives[(m(d^2)x) /
1. 1 answer
2. asked by lucy
3. 1,106 views
A firm has production of cars in 2 countries with the following demand:Sweden: P= 300- 5Q Denmark: P= 150- 3Q Marginal cost for
1. 0 answers
2. asked by luke
3. 1,084 views
A solenoid is wound with a single layer of insulated copper wire of diameter 2.800 mm and has a diameter 5.000 cm and is 1.500 m
1. 4 answers
2. asked by Andy
3. 1,077 views
Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of the
1. 4 answers
2. asked by Lyndse
3. 1,065 views
Can you please tell me if the following statements are correct. In particular, if the ones in parentheses are also possible?
1. 1 answer
2. asked by Franco
3. 1,051 views
Need help with these--25. Bacteria and eukaryotes share the characteristic of a. multicellularity b. a cell nucleus c. a cell
1. 1 answer
2. asked by mysterychicken
3. 1,041 views
Can you help me with penn foster exam for general math 1?I would like to know if my answers are right
1. 8 answers
2. asked by molisa
3. 1,038 views
Tarzan, who weighs 820 N, swings from a cliff at the end of a 20.0 m vine that hangs from a high tree limb and initially makes
1. 1 answer
2. asked by nate
3. 1,037 views
Why publicly traded companies must report revenue growth? What is the effect of this reporting on business operations?
1. 1 answer
2. asked by Xichenio
3. 1,035 views
medication duration using the function of e through time lapseproblem D(h)=8e(up carrot)-0.31(h) find med level at 1 hour- no
1. 2 answers
2. asked by BecKi
3. 1,004 views
What factors directly affect how much air drag an object experiences?
1. 1 answer
2. asked by j
3. 1,002 views
Need help with these:33. In addition to causing disease, protests also affect humans through a. their role in the nitrogen cycle
1. 1 answer
2. asked by mysterychicken
3. 992 views
I have to write a paragraph writing a description about my sister using figurative language. Please find the paragraph below.
1. 4 answers
2. asked by Ruth
3. 972 views
If 2.0J of work is done in raising a 180g apple, how far is it lifted?
1. 1 answer
2. asked by joe
3. 972 views
If a hydrate of the formula decomposes when heated to produce HCl, what change would you expect to occur when a piece of blue
1. 3 answers
2. asked by David
3. 971 views
Find the time it takes for a water balloon dropped from a second story window and accelerating at 9.8 m/s² downward to hit a
1. 0 answers
2. asked by Justine
3. 939 views
∆H⁰rxn, for the reaction of Ca(s) + 2H+(aq) -> Ca2+(aq) + H2(g) is -544 kJ/mol.∆H⁰rxn, for the reaction of CaO(s) +
1. 4 answers
2. asked by Luc
3. 933 views
Light of wavelength 680 nm falls on two slits and produces an interference pattern in which the fourth-order fringe is 47 mm
1. 0 answers
2. asked by Anonymous
3. 929 views
How many milliliters of glycerol, C3H8O3(d=1.26g/mL), must be added per kilogram of water to produce a solution with 4.85 mol %
1. 2 answers
2. asked by david
3. 902 views
how do you find the slope of a line? and is it possible to find it by taking two points on a line?
1. 2 answers
2. asked by Anonymous
3. 896 views
A tourist in Ireland wants to visit seven different cities. If the route is randomly selected, what is the probability that the
1. 3 answers
2. asked by Shannon
3. 891 views
psy 210 CheckPoint: Research MethodsResearch Method Description Application Scientific method Case study method Survey method
1. 2 answers
2. asked by Anonymous
3. 856 views
Where are the enzymes maltase, sucrase,and lactase produced?Is it the small intestine?
1. 1 answer
2. asked by sammi
3. 851 views
What can we conclude from the attractive nature of the force between a positively charged rod and an object?1. The object has no
1. 1 answer
2. asked by Anonymous
3. 846 views
Carbonic acid is a diprotic acid that ionizes in two stages.Write the two equations for the successive ionizations of carbonic
1. 1 answer
2. asked by Josh
3. 843 views
How many neon atoms are there in five moles?
1. 1 answer
2. asked by Jack
3. 836 views
Axum's conversion to Christianitya. beneficial b. a drawback c. first a drawback then beneficial d. first beneficial then a
1. 5 answers
2. asked by joel
3. 829 views
microorganisms can't break down plastics because...I'm stuck between a) plastics are made from oil d) plastics don't occur in
1. 1 answer
2. asked by Jaz
3. 827 views
The measures of three of the angles of a quadrilateral are 40, 70, and 130. What is the measure of the fourth angle?
1. 1 answer
2. asked by Harry
3. 806 views
I know how to find a and b on this problem but how do I find c? Really would appreciate the help, thanks!The formula of a
1. 1 answer
2. asked by Jenny
3. 786 views
A crate full of artichokes rests on a ramp that is inclined 10.0° above the horizontal. Give the direction of the normal force
1. 0 answers
2. asked by max
3. 782 views
Under an O2 pressure of 1.00 atm, 28.31 mL of O2 dissolves in 1.00 L H2O at 25 degrees.Determine the molarity of O2 in an
1. 4 answers
2. asked by david
3. 772 views
Parasites are dependent on their hosts for survival. Which organism do you think is better adapted to a parasitic lifestyle, one
1. 1 answer
2. asked by Telly
3. 761 views
The President of the Company has asked you to replace the computers in every department. The researched information must be
1. 3 answers
2. asked by lasandra
3. 760 views
What mass of cholrine must be added to 100.0 L of water to achieve this level? Most community water supplies have 0.5 ppm of
1. 1 answer
2. asked by Anonymous
3. 753 views
A baseball player with mass m = 80 kg, sliding into second base, is ed by a frictional force of magnitude 450 N. What is the
1. 2 answers
2. asked by Anonymous
3. 749 views
A 4.0-kg block is at rest on a horizontal floor. If you push horizontally on the 4.0-kg block with a force of 12.0 N, it just
1. 2 answers
2. asked by Max
3. 746 views
A horse is trotting along pulling a sleigh through the snow. To move the sleigh, of mass m, straight ahead at a constant speed,
1. 0 answers
2. asked by Max
3. 743 views
I just want to see what you all think. I had to write a paper on Malathion and the West Nile Virus. I also had to go by the
1. 1 answer
2. asked by stephanie
3. 735 views
I have to write a paragraph writing a description about my sister using figurative language.I have no idea what to do. Can you
1. 3 answers
2. asked by Ruth
3. 728 views
What do you feel about community corrections?Do you feel a community-based punishment is justifiable in today’s society?
1. 1 answer
2. asked by k
3. 726 views
State the negation of the following statement:It is not raining. please help explain
1. 1 answer
2. asked by miranda
3. 725 views
Find the molar mass of Chromium (III) Hydrogen Phosphate. Also, what is the chemical formula for this molecule?
1. 1 answer
2. asked by Jack
3. 724 views
If 1/2 of the students are girls and 1/3 of the girls have long hair, what percent of the girls have long hair
1. 1 answer
2. asked by tracy
3. 721 views
What part of food science does the career of sous chef fall under?Options: preparation, utilization, evaluation,production I was
1. 1 answer
2. asked by Lena
3. 716 views
three number form an arithmetric sequence. Their sum is 24.A)If 'a' is the first number and 'd' the common difference, show that
1. 7 answers
2. asked by Anonymous
3. 714 views
I need help with this assignment: Argument Evaluation DUE: Day 7 Points: 100· Read the essay “Bush’s Environmental
1. 3 answers
2. asked by Joe
3. 702 views
What can we conclude from the attractive nature of the force between a positively charged rod and an object?1. The object has no
1. 1 answer
2. asked by Anonymous
3. 698 views
1)RuO2 is molecular, but why is it insulator even though Ru is metal?2)Why is TiO ionic? I thought only group 1 and 2 would make
1. 1 answer
2. asked by eng
3. 692 views
A grocer wants to m,ix three kinds of hard candy to sell for $2.40 per pound. He need 50 pounds of candy altogether. He mixes
1. 0 answers
2. asked by Alyssa.
3. 690 views
I need help with science pangaea project ideas? my teacher wants a great project, and i really need the grade.?my teacher is
1. 1 answer
2. asked by NEEDSHELP
3. 687 views
A brick wall is built by using 2 bricks less in each layer than in the previous one. The wall has m layers and in total 21m+40
1. 3 answers
2. asked by Anonymous
3. 676 views
prairie dogs live in underground burrows with at least 2 entrances. they ventilate their burrows by building a mound around one
1. 2 answers
2. asked by Mal
3. 676 views
ok im struggling in math becuase my math teacher isnt really explianing things really good my mom tried 2 swich me to a
1. 3 answers
2. asked by joclyn
3. 674 views
Which of the following materials would not be important to a protozoan?a) enzymes b) oxygen c) water d) blood e) carbohydrates
1. 2 answers
2. asked by sammi
3. 672 views
What is the chemistry behind caffeine extraction with Na2SO4, CH2CL2 and NaCO3. I know that Na2SO4 some how aborbs the water
1. 1 answer
2. asked by Chonos
3. 669 views
You are getting ready for your 1st day of work and realize that you have several options of how to get to bank of Wall Street.
1. 0 answers
2. asked by lasandra
3. 668 views
What kind of compound would you add to the water-insoluble amine aniline to make it more soluble in water?
1. 1 answer
2. asked by Holly
3. 660 views
Suppose there are 7 roads connecting town A to town B and 5 roads connecting town B to town C. In how many ways can a person
1. 1 answer
2. asked by Lyndse
3. 648 views
If the molecular mass for a chemical is 45.99 g/mol and the enthalpy of formation is 34 kJ/mol, the heat change will be
1. 1 answer
2. asked by Mary
3. 641 views
a slide loving pig slides down a certain 16° slide in twice the time it would take to slide down a frictionless 16° slide.
1. 0 answers
2. asked by Anonymous
3. 636 views
Consider an infinitely long solid cylinder with radius R_0 and volume charge density rho=rho_0*r(r≤R_0) where rho_0 is a
1. 0 answers
2. asked by Taylor
3. 634 views
Each term of a progression is determined by adding 0.5 to the preceding term. the sum of the first 25 terms of the progression
1. 1 answer
2. asked by Anonymous
3. 634 views
Thank you very much! I would like you to check these few more statements, too.1) Summarise briefly (or briefly summarise) the
1. 2 answers
2. asked by Franco
3. 619 views
In the sequence: x+4y ; 2y+2 ;x ;y-1, (consisting of 4 terms) the first three terms form an arithmetric progression, while the
1. 1 answer
2. asked by Anonymous
3. 618 views
I am stuck at the last line of this problem. The original formula isR=Rf+B(Rm-Rf) I have moved it and placed the known
1. 1 answer
2. asked by candis
3. 616 views
When 0.678 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 11.0C is observed.Assume the
1. 6 answers
2. asked by Libit
3. 615 views
This is a long one, but it is a no solve.Youʼre cooking four pancakes, one at a time, using a stove-top timer to judge the time
1. 0 answers
2. asked by Kristy
3. 613 views
I forgot to include the following two statements. Thank you very much for your help.1)He believes a good slogan needs to be
1. 2 answers
2. asked by Franco
3. 609 views

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