Questions Asked on
November 25, 2010

Physics
Workers have loaded a delivery truck in such a way that its center of gravity is only slightly forward of the rear axle. .63m in front of the rear wheels and 2.3m behind the front wheels. The mass of the truck and its contents is 9155 kg. Find the
asked by shai 
chemistry
Of the following solutions, which has the greatest buffering capacity? A) 0.821 M HF and 0.909 M NaF B) They are all buffer solutions and would all have the same capacity. C) 0.100 M HF and 0.217 M NaF D) 0.121 M HF and 0.667 M NaF E) 0.821 M HF and 0.217
asked by jes 
chemistry
a 5.55g sample of a weak acid with ka=1.3*10^4 was combined with 5.00ml of 6.00 M NAOH and the resulting solution was diluted to 750mL. The measured pH of the solution was 4.25. what is the molor mass of the weak acid. if used the formula
asked by help 
Physics
Kenny Klutz drops his physics book off his aunt's high rise balcony. It hits the ground below 1.5s later. a. With what speed does it hit? b. How high is the balcony? (Ignore the air drag)
asked by Laura 
Physics
Calculate the hang time of an athlete who jumps a vertical distance of 0.75 meter.
asked by Laura 
Physics
A 10.2 kg weather rocket generates a thrust of 200N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 500N/m, is anchored to the ground. a) Initially before the engine is ignited,
asked by Alexandra 
College Physics II
A typical gamma ray emitted from a nucleus during radioactive decay may have an energy of 736 keV. What is its wavelength? A microwave oven produces electromagnetic radiation at λ = 12.1 cm and produces a power of 778 W. Calculate the number of microwave
asked by VJC 
college
In an isometric exercise a person places a hand on a scale and pushes vertically downward, keeping the forearm horizontal. This is possible because the triceps muscle applies an upward force Marrowbold perpendicular to the arm, as the drawing indicates.
asked by Anonymous 
stat
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the percentage of bulbs that can be expected to last the period of time. 77) At least 500
asked by Anonymous 
chemistry
3CuCl22H2O + 2AL> 3Cu +2AlCl3+6H2O what is the thepretical yield or copper? then what is the limiting reagent and excess reagent? whats the percentage yield?
asked by Brianna 
math
The shape of a patio is trapezoidal with a height of 10 ft and bases of 19 ft and 13 ft. What is the cost of outdoor carpeting to cover the patio if the carpeting costs $1.50 per ft2?
asked by Anonymous 
Physics
Computercontrolled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. For instance, as a car is going through a turn, a speed of 201 mi/h (89.847 m/s) and a centripetal acceleration
asked by Xavier 
Physics
A child rolls a ball on a level floor 3.4 m to another child. If the ball makes 9.0 revolutions, what is its diameter?
asked by Kevin 
Physics
A carbon dioxide laser is an infrared laser. A CO2 laser with a cavity length of 48.4 cm oscillates in the m=100,000.0 mode. 1. What is the wavelength of the laser beam? 2. What is the frequency of the laser beam?
asked by Mike 
physics
a geosynchronous satellite orbits at a distance from earth's center of about 6.6 earth radii and takes 24 h to go around once. what distance in meters does the satellite travel in one day? what is its orbital velocity in m /s?
asked by robin 
physics
In an isometric exercise a person places a hand on a scale and pushes vertically downward, keeping the forearm horizontal. This is possible because the triceps muscle applies an upward force perpendicular to the arm, as the drawing indicates. The forearm
asked by shai 
Physics
What is the longest wavelength for standing sound waves in a 108.0 cm long tube that is open at both ends? What is the second longest wavelength? What is the third longest wavelength?
asked by Mike 
helping abused children
what is the best statement about children who are abused
asked by anna 
Physics
In a simulated headon crash test, a car impacts a wall at 25 mi/h (40 km/h) and comes abruptly to rest. A 120 lb passenger dummy (with a mass of 55 kg), without a seat belt, is stopped by an air bag, which exerts a force on the dummy of 3000 lb. How long
asked by Renee 
Chemistry
If 18.0g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O how many grams of H2Oare produced
asked by Mat 
math
If a single fair die is rolled, find the probability of a 4 given that the number rolled is odd.
asked by jo 
IMPORTANT PHYSICS
four objects, each with a positive charge of 1.0 x 10^6 C, are placed at the corners of a 45 degree rhombus with sides of length 1.0 m. Calculate the magnitude of the net force on each charge.
asked by Jill 
Statistics
The weights of the fish in a certain lake are normally distributed with a mean of 11 lb and a standard deviation of 6. If 4 fish are randomly selected, what is the probability that the mean weight will be between 8.6 and 14.6 lb? A) 0.0968 B) 0.4032 C)
asked by Sarah 
Chemistry
The following reaction is used to produce tungsten(VI)oxide: WS3(s) + O2(g) ¨ WO3(s) + SO2(g) The WO3 is then heated and undergoes a decomposition reaction produce tungsten and oxygen gas. How many grams of tungsten could be produced if 39.27 grams of
asked by andrea 
english
After completing the required readings for this week, discuss how you see the theme of creating art developing in the different stories and poems. What did you learn about the human impulse to create? Give examples from one of the stories and at least two
asked by kim 
physics
four objects with a positive charge of 1.0 x 10^6 C, are placed at the corners of a 45 degree rhombus with sides of length 1.0 m. Calculate the magnitude of the net force on each charge.
asked by Jill 
Chemistry
C15H30 is a hydrocarbon that reacts with oxygen gas to give carbon dioxide and water. Calculate the mass of water (grams) formed when 859.64 grams of the hydrocarbon reacts with the oxygen gas. can someone please show me how this is done thanks
asked by stacy 
Physics
A stone is tied to a string (length = 0.800 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the
asked by Xavier 
chemistry
a 5.55g sample of a weak acid with ka=1.3*10^4 was combined with 5.00ml of 6.00 M NAOH and the resulting solution was diluted to 750mL. The measured pH of the solution was 4.25. what is the molor mass of the weak acid. if used the formula
asked by help 
statistics
Suppose we have a set of body temperature with a mean of 97.6 degrees and a standard deviation of 0.3 degrees. between what two values should 99% of all temperatures lie?
asked by Debora 
physics
A uniform metal rod of mass 100 kg and L (2.5m) is suspended from the side of the building. On the far end of a mass of 100 kg is hung by a rope, (distance L from a building). The rod is connected to the building on the left end by a pivot, (and a force F
asked by Luke 
Chemistry
Given the following reaction: HCl(g) + SrO(s) ¨ SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 11.44 kg SrO.
asked by andrea 
chemistry
I did an experiment with a sand sample which contains fine metallic aluminium and I wanted to measure how much of this metallic aluminium is in the sample. I used the NaOH solution in order to let react the aluminium and collect the H2. From the H2 amount
asked by Leny 
microeconomics
The marketing division of a firm has measured demand for its product and reports that it is Q = 24 – P, where Q is units and P is price per unit in dollars. The cost is given in the table below. Complete the table and determine the profitmaximizing
asked by Emma 
Physics  Kinematics
Qn: Ball 1 is launched up an inclined plane from the bottom of the plane with an initial speed that is the minimum speed for it just to reach the top of the plane. At the same moment as ball 1 is launched up the plane, Ball 2 is released from rest at the
asked by Rod 
Math
Fine the size of the following matrix and its additive inverse matrix. Identify if it is a square, column, or row matrix: [ 2 3 7 1 0 4 ]
asked by Jeff 
English
Thank you very much for your corrections. Can you help me with these sentences, please? Thank you very much. 1)Despite the corruption among the clergy, the church played a fundamental role in the Middle Ages. Actually/In particular/As a matter of fact/In
asked by Franco 
English
What is the best short story (online) to read?
asked by Keziah 
Mathematics
What is the best website to practice some free maths worksheets for grade 7 ? (NSW curriculum)
asked by Jocelyn 
ALGEBRA/ URGENT
Doing something wrong. Write an equation of the line containing the given point and perpendicular to the given line. (4,5;)4x+y=8; I tried this. y = 4x+8. The slope is the reciprocal of 4 so 1/4. Then (y  y^1=m(xx^1). y 4 = 1/4(x4). I then multiplied
asked by AMY 
ALGEBRA/PLEASE HELP
Write an equation of the line containing the given point and parallel to the given line. Express in y=mx+b. (4, 9); 9x = 8y+5
asked by AMY 
physics
a geosynchronous satellite orbits at a distance from earth's center of about 6.6 earth radii and takes 24 h to go around once. what distance in meters does the satellite travel in one day? what is its orbital velocity in m /s?
asked by robin 
math
let A=(3 x) (2 3) if A=A^1, what is x? please show work so i can understand
asked by jim 
Chemistry
I have spent all afternoon (on Thanksgiving, no less) trying to figure out these postlab questions. We had to produce a precipitate of a reaction of: 1) 1 ml 1M Na2SO4 + 9mL 1M CaCl2 Our result was .569g 2) 5 ml 1M Na2SO4 + 5 ml 1M CaCl2 Our result was
asked by Stephanie 
com 156
Explain the time management strategies you will use when writing a successful academic paper.What technique discussed in your us/101 course may help you manage your time when writing a paper?
asked by Mia 
english grade 12 Important due on monday
hey i need help .....how can i start the essay with the introduction ( containing my thesis) about the links between animal behavior and human behavior and i need also give examples from the book "life of Pi" thaks for everyone who help me out!!!!
asked by tarkan 
Math
Solve the equation: 2^x^24x = (1/16)^x4
asked by James 
Math
Solve the equation e^x2+5x+6=1
asked by DAVE 
MATH
Perform the operation for each equation, if there is a solution [4k 8y ] [5k+6y 2k+1] [6z  3x]  [2z+5x z+4] [2k + 5a] [4k+6a 3a+2]
asked by Jessica 
math
One card is selected from a deck of cards. Find the probability of selecting a red card or a card less than 4 . (Note: The ace is considered a low card.)
asked by Anonymous 
physics
A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (ìk = 0.43). What is its final speed? (m/s)
asked by sandhu 
chemistry
how can convert millilitter to gram for tetraiso propyl alcohol
asked by pradee 
math
in a paralleogram,if angle A=(2x+25)degree and angle B=(3x5)degree,find the value of x and the measure of each angle of the parallelogram.
asked by piyush 
5th grade
i have four sides.all opposite sides are parallel.i have no right angles.
asked by Anonymous 
physics
Posted by sandhu on Thursday, November 25, 2010 at 6:23am. A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (ìk = 0.43). What is its final speed? (m/s) physics  drwls, Thursday, November 25, 2010 at 9:19am Final
asked by sandhu 
College Physics II
1) An electron moving with a speed of 2.84E+6 m/s has the same momentum as a photon. Calculate the de Broglie wavelength of the electron. 2) Calculate the wavelength of the photon.
asked by VJC 
math
On a bar graph the average cost of renting a studio in one city in years 1994 through 1998. The graph goes from 0 to 600. Year 94 is up to 400, year 95 is up to 500, year 96 is up to 500, year 97 is up to 525, and year 98 is up to 550. By what percentage
asked by m 
government
The argument over slavery pitted _____ States against _____ States.
asked by Misael 
psychology
what is a psychology term for negative stress
asked by Beca 
Anatomy/Health
Other then caffeine what else can stimulate the central nervous system. And I don't mean like prescription drugs (eg. provigil, adder all) Thank You
asked by Reema 
physics
Lazydog and his tractor (1330 kg) are pulling a trailer (530 kg) up a 7° hill. The trailer wheels roll freely. What is the magnitude of the force in the coupling between the tractor and trailer when their velocity is 8.7 m/s up the hill and they are
asked by sandhu 
Algebra
There is a table of values for the function f. They read: x=3, f(x)=4 x=4 f(x)=5 x=5 f(x)=6 x=6 f(x)=3 x=7 f(x)=5 x=8 f(x)=7 What is the value of 2f(5)f(4)? I did this wrong obviously, but what I did was figure out the function of five from the table (4),
asked by Benjamin 
physics
A 1200N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1825N crate hangs from the far end of the beam. (a) Using the data shown in the drawing, find the magnitude of the tension in the wire. (b)
asked by shai 
geometry
A sphere has a 7 m diameter. What is its volume to the nearest hundredth?
asked by eric 
statistics
given variables list them as independent (x) or as a dependent (y) I weight of child; prescription dosage II monthly commision; monthly sales II ability to concerntrate; level of fatique IV crop yield; rainfall
asked by sandra 
math
One card is selected from a deck of cards. Find the probability of selecting a black card or a queen.
asked by Anonymous 
English
1. You can't go there alone. 2. You are not able to go there alone. 3. You are not allowed to go there alone. (What does #1 mean? Does #1 mean #2 or #3?)
asked by rfvv 
English
1. May I come in? 2. Yes, you may. 3. No, you mayn't. (Can we say #3?) 4. The rumor may not be true. 5. The rumor mayn't be true. (Can we use the contracted form, 'mayn't'?)
asked by rfvv 
chemistry
why sugar dissolve in cooking oil
asked by jason 
math
what is the fourth methods in finding the GCF?
asked by redalyn m nemenzo 
Geography
Can you suggest some legends stories for South Sumatra?
asked by Trisha 
math
One card is selected from a deck of cards. Find the probability of selecting a red card or a heart
asked by john 
Electrical Switches
What are the factors you consider when buying an electrical switch? I want to know what different people consider in order to obtain a good selection procedure. Thanks!
asked by Claire 
College Physics II
What is the de Broglie wavelength of electrons with the following value of kinetic energy? 1.06 eV; What is the de Broglie wavelength of electrons with the following value of kinetic energy? 1.06 keV.
asked by VJC 
English
I need to find a set of poems for childhood, the subtopic being amusement. I can't really find any poems about children playing or something; Can I please get links to some? Thanks MC
asked by mysterychicken 
physics
A basketball is thrown with a velocity of 10.5 ft/s downward from a height of 6.8 ft. The coefficient of restitution between the ball and the floor is 0.65. How high does the basketball go after its 2nd bounce?
asked by sandhu 
English
Thank you very much for your corrections. Can you please help me check these sentences, please? 1) Don't write longwinded sentences.Your sentences must contain no more than two subordinate clauses. (or two subordinates at the most?) 2) You wondered off
asked by Franco 
Enviromental science
Explain hom the nitrogen usen for makinp proteins in a lion's body traveled from the atmosphere to the lion?
asked by Anonymous 
Physics
The wave speed on a string is 146 m/s when the tension is 70.0 N. What tension will give a speed of 183 m/s?
asked by Michael 
math
Given ∠ABC, if m∠A=11x, ∠B = 3x + 4, and m∠C = x  4, find the measure of each angle.
asked by jim 
english
is it right when we say am confused or i am in confusion or confused ?
asked by JJ 
math
A square martix A is said to be idempotent if A=A^2. The only real numbers that are idempotent are 1 and 0, but this is not true for martices. Find a 2x2 idempotent other than 1 or 0.
asked by jim 
Biology
Why doesn't blood clot in your blood?
asked by Marie 
physics
A basketball is thrown with a velocity of 10.5 ft/s downward from a height of 6.8 ft. The coefficient of restitution between the ball and the floor is 0.65. How high does the basketball go after its 2nd bounce?
asked by sandhu 
Algebra
Can someone help me on this problem I worked it and worked it and cannot figure it out?? ¨ö Z + ¨ü < ¨ú Z + 1/16
asked by TRACY 
Linear algebra
find an equation of a plane containing a point (0,6,2) and parallel to vector v1= (0,3,0), v2=(0,9,1) Help!
asked by J Velji 
chem
calculate the number of moles of naI e50.0ml of a 0.400m
asked by hylton 
Science
if it takes 20 newtons to accelerate an object weighing 15 kg 0.1 meters per second squared to the west what is the force of kinetic friction?
asked by Abby 
Probability & Odds
What are some examples of probability and odds?
asked by Michelle 
Math
What are some Quartile examples?
asked by Michelle 
Calculus  please help!
Suppose that 0 < c < ¥ð/2. For what value of c is the area of the region enclosed by the curves y = cos x, y = cos(x  c), and x = 0 equal to the area of the region enclosed by the curves y = cos(x  c), x = ¥ð, and y = 0? i have no idea how to solve
asked by K 
Math
The table below gives the educational attainment of the U.S. population 25 years and older since 1960. Males Percentage with 4 years of highschool 1960 39.5% 1970 51.9% 1980 67.3% 1990 77.7% 2000 84.2% 2004 84.8% Percentage with 4 years of college or more
asked by Jessica 
Chemistry
how do you find delta h of 0.025 moles of water?
asked by Faye 
geometry
A longdistance runner runs 5 miles south and then 8 miles east. How far is the runner from the starting point? Round your answer to thousandths
asked by Anonymous