Questions Asked on
February 8, 2014

science  pls check my work!!!
hi, pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) solid*** liquid gas molecule 2. Why is a gas able to flow? (1 point) Its particles have melted and can move around.Its particles have high viscosity and can move
asked by TTR+S<3 
Wave
What feature is NOT defined for a wave pulse? a)period b)wave speed c)the position of a particle at a certain time d)a defined source
asked by John 
Math
Let f(x) be a polynomial such that f(cos theta) = cos(4 theta) for all theta. Find f(x). (This is essentially the same as finding cos(4 theta) in terms of cos theta; we structure the problem this way so that you can answer as a polynomial. Be sure to write
asked by John 
forces
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 64 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 69 kg and exert average forces of 1365 N
asked by Melissa 
chemistry
An unknown compound contains only carbon, hydrogen, and oxygen (CxHxOx). Combustion of 3.50G of this compound produced 5.13G of carbon dioxide and 2.10G of water A.How many moles of carbon, , were in the original sample? b. How many moles of hydrogen, ,
asked by URGENT! 
physics
Two identical weights of mass M are linked by a thread wrapped around a frictionless pulley with a fixed axis. A small weight of mass ‘m’ is placed on one of the weights. What is reaction force between m and M?
asked by vaibhav 
Chemistry
I have .8ml of 35% by weight hydrogen peroxide. The hydrogen peroxide density is 1.14 g/ml. how many moles of hydrogen peroxide are there?
asked by Dina 
physics
Suppose electrons enter a uniform electric field midway between two plates at an angle ¦È0 to the horizontal, as shown in the figure
asked by Anonymous 
Physics
18 cars in a circle at a boom box competition produce a 105 dB sound level at the center of the circle. What is the average sound level produced there by each, assuming interference effects can be neglected? dB = ?
asked by ddsMom 
Southern Union
A large building has an inclined roof. The length of the roof is 64.0 m and the angle of the roof is 20.0° below horizontal. A worker on the roof lets go of a hammer from the peak of the roof. Starting from rest, it slides down the entire length of the
asked by Mary Anne 
Physics
Charges of −q and +2q are fixed in place, with a distance of 4.65 m between them. A dashed line is drawn through the negative charge, perpendicular to the line between the charges. On the dashed line, at a distance L from the negative charge, there is at
asked by Anonymous 
Physics
The only force acting on a 4.7 kg body as it moves along the positive x axis has an x component Fx = 6x N, where x is in meters. The velocity of the body at x = 2.4 m is 11 m/s. (a) What is the velocity of the body at x = 4.9 m? (b) At what positive value
asked by john 
Science
Which of the following would result in the greatest reduction of waste sent to a landfill? a composting food waste b recycling glass, plastics, and metals c reusing rubber, leather, and textiles from new products d planting more trees in forests my
asked by Steve 
science
A British Concorde (BC) and a French Concorde (FC) flew in opposite directions around the earth (40 000 km). The BC covered half of its flight distance at a supersonic speed of 2500 km/h and the other half at a subsonic speed of 1000 km/h. The FC spent
asked by king12 
Science
Why are rain forests the most diverse ecosystems? a the are near bodies of water b they have favorable climates c they are surrounded by mountains d they have more pollutants then other ecosystems my answer is B
asked by Steve 
Science
Why is biodiversity ecologically valuable? a it provides humans with food and shelter b it is reliable source of revenue c it establishes the foundation for food chains and food webs d it provides raw materials fore clothing and medicine my answer is C
asked by Steve 
Science
Oil spills and leaks in the Pacific Ocean have harmed marine organisims and the environment. Which kind of environmental issue is illustrated by this example? a resource use b pollution c population growth d biodiversity My answer is D
asked by Steve 
Chemistry
A titration involves titrating 0.4 M NaOH into a solution of 0.2 M H3PO4. a.) Calculate the volume of NaOH that will be required to reach the first equivalence point. b.) Calculate the volume of NaOH required to reach the second equivalence point. Other
asked by Anonymous 
maths
There are 29 students in the class. 21 students are in base ball team and 12 students are in foot ball team...but some students play both the games..how many students play both games?
asked by laiba ahmer 
Physics
A trash can with a mass of 5 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. (The Active Figure applies to a similar situation, but the values of the mass, coefficient of static friction and
asked by Ray 
Physics
Sound is emitted by a point source. You wish to compare the sound intensity and sound intensity level from this source at two different sites. If the distance to the second site is a factor of 6 greater than the distance to the first, determine the
asked by ddsMom 
Physics
A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's engines can power it to accelerate with an average acceleration of 5.6 m/s^2. A.) what length of runway will it need to take off safely? B.) suppose it had an available runway length of
asked by Michelle 
Economics
Suppose you are the manager of a California winery. How would you expect the following events to affect the market equilibrium price you receive for a bottle of wine? Please state the shift (leftward or rightward) of demand or supply. a. The price of
asked by Summer 
statistics
Suppose a Stat 1450 web class has 15 males (8 are also students at OSU) and 12 females (7 are also students at OSU). What is the probability that a randomly selected student is either female, or also a student at OSU? Submit answer in decimal form and
asked by john smith 
english literature
what does this mean. the city now doth like a garment wear
asked by renae 
Calculus Help
If a ball is thrown vertically upward from the roof of 64 foot building with a velocity of 32 ft/sec, its height after t seconds is s(t)=64+32t–16t2. What is the maximum height the ball reaches "in ft"? What is the velocity of the ball when it hits the
asked by Calculus Velocity 
Greatest Common Factor
There sre 16 rocks that are green and 24 rocks that are blue. Sharon is dividing her green and blue rock collection into bags. Each bag will contain the same number of each color of rock. How many rocks of each colr will be in each bag?
asked by Sheila 
Stats
Determine the following random variables discrete or continuous: a)Number of fish I caught during 2 hours? I said: discrete b)Temperature of a coffee cup? I said: continuous c)Height of a 2yearold maple tree? I said: continuous d) Number of credit cards
asked by Ashley 
math
In Lewis Carroll's Through The looking Glass, Tweedledum says, "the sum of your weight and twice mine is 361 pounds". Tweedledee replies, "The sum of your weight and twice mine is 362 pounds". Find both weights. ONLY AN ALGEBRAIC SOLUTION WILL BE ACCEPTED
asked by B8 
Healthcare Economics
Your president bought two acres of land for $200,000 ten years ago. Although it is zoned for commercial use, it currently houses eight small, singlefamily houses. A property management fir that wants to continue leasing the eight houses has offered you
asked by Lisa 
pre calculus
The age of a document is in dispute, so archaeologists test for carbon14. Due to radioactive decay, the amount A of carbon 14 present compared to the initial amount A0 after t years is given by the formula A(t) = A0e^0.000124t . If 72% of the original
asked by Raju 
MATH
A letter carrier can deliver mail to 112 homes per hour by walking and 168 homes per hour by driving. Question1: By what percent is productivity increased by driving? Question2: If a new ZIP Code system improves driving productivity by 12.5%, what is the
asked by kik 
pre calculus
A sum of $5000 is be invested in a bank. if the annual interest is 10% and compounded monthly, how long will it take for the original investment to double.
asked by Raju 
Chemistry
Write the chemical formula and number of ions formed when the following electrolyte dissolves in water. Make sure to include appropriate states. K3PO4 = ??? Any help with this is greatly appreciated!
asked by Amanda 
Math  Alg
How much pure acid must be added to a 30% acid solution to make a 60L solution which is 50% acid? This was the answer I got from Reiny. amount of pure acid to be added  x L 1(x) + .3(60x) = .5(60) 10x + 3(60x) = 5(60) 10x + 180  3x = 300 7x = 120 x =
asked by Brittany Jones 
math
kyle reduced his investment in collins company from $11, 700 to $4,300. what was the percentage rate of decrease?
asked by kik 
math vector
Find the Principal unit normal vector to the curve at the specified value of the parameter. r(t)=ti+t^(2)j+lntk, t=1
asked by jay 
science
1.What two things happen to particles in a substance when the substance is heated? 2. What are the three most common states of matter on Earth? 3. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container
asked by bob 
physics
2 tall buildings are 200m apart. with what speed a ball be thrown horizontally from a window of one building 2km above the ground so that it will enter a window 40m from the ground in the other?
asked by latika 
math
at midnight the temperature was 28 degrees colder than it was at noon. The temperature at midnight was 34 degrees What was the temperature at noon
asked by Anonymous 
math
Lenny's height has increased by 1 (3/4) times his height at 3 years old. In percentage terms, how much has Kenny grown?
asked by luce 
Social Studies
What did the Monroe Doctrine hope to accomplish?
asked by Sam 
Business Law II
Ross is a wealthy man. Out of the kindness of his heart, he transfers a piece of real property to his church, "for as long as the property is used for church purposes." Ross has created which of the following ownership interests? A) Life estate to the
asked by Lynn 
Chemistry
Alcoholic drinks contain ethanol. 10cm3 of ethanol is called one unit of alcohol. Men are advised to drink a maximum of 21 units of ethanol a week, while women are advised to drink a maximum of 14 units. Wine contains about 14% ethanol by volume. A) a
asked by Ella 
MITx: 6.002x Circuits and Electronics
The step response of a circuit is its response to a step input, u(t). Knowing the step response of a linear circuit is extremely valuable as we can figure out the circuit's stability. In this problem we will analyze the circuit in Figure 1 for the output
asked by sushma 
chemistry
How much dry solution would it take to prepare 135 0.120M NaNO3 to a sovent?
asked by marjorie 
Science
Does the preservation of biodiversity prevent the extinction of species? My answer is yes
asked by Steve 
math
I need help with "write in equation in slopeintercept form for the line that is parallel to to the given line line and and that passes through the given point. y=1/2x=5;(4,3) How do you find a line that is perpendicular. Please and thank you! :)
asked by Kerri 
US History
what is the significance of the internment of Japanese Americans during World War II.
asked by Anne 
Business Law II
Yi conveyed a piece of land by general warranty deed. The deed included a covenant of seisin. With this covenant, Yi promised that: A) she has the power to make the conveyance. B) the land is free from any easement, profit, mortgage, etc. C) no other
asked by Lynn 
Physics
You and a friend each drive 54 km. You travel at 95 km/h; your friend travels at 118 km/h. How many minutes will your friend have to wait for you at the end of the trip?
asked by Erin 
Stats
The probability that Jack plays guitar on a raining day is 0.6 and on a sunny day is 0.5. The probability that is rains tomorrow is 0.8. Find the probability that Jack will not play guitar tomorrow.
asked by Ashley 
Math
Practice adding and subtracting fractions. 1/ Jill's friends met at her house to go on a hike to the lake.they walked 1/4 of the way and then rested. How much further do they have to go to reach the lake? I don't know 2/ When they reached the lake , they
asked by Nawaf 
chem
Consider the following neutralisation reaction: 2 H3PO4(aq) + 3 Ca(OH)2 (aq) → Ca3(PO4)2 + 6 H2O Determine the volume of 0.75 M H3PO4 necessary to neutralise 35 ml of 0.45 M Ca(OH)2
asked by vicky 
Math Sums and Differences
Use the strategy of your choice to find the sums and differences below. a)(4)+(10)+(4)+(2) b)(5)+(8)+(3)+(7) c)(19)+(14)+(21)+(23) d)(5)(10)(4) e)(3)(3)(3) f)(+26)(32)(+15)(8) Continue each pattern, 3 times a) 5,2,1,4,,, b)
asked by Harmony Ann 
physics
a bead on a wire 30m high is released and reaches point A, where is loops twice towards the right. what is the velocity and acceleration at point AD? point A is at 20m directly below from starting point. Point B is 10m at the bottom of the first loop.
asked by christopher 
Payback periods
purchase price 550,000, period of useful 10 years, annual revenue 100,000,operating costs 32,000, depreciation 55,000 no income taxes can you show me how to get the answer I have an answer but not sure if it is correct
asked by Carol 
,;
Increase the amount and variety of seafood consumed by choosing seafood in place of _____. A. Breads B. Fruits C. Vegetables D. Some meat and poultry
asked by xd 
art
how do we learn to draw?
asked by stephanie 
Probability
A pair of dice is rolled, one black and one white. Find the probability of each of the following events. 1. The total is between 3 and 7. My answer: 1/3 2. The total is 13. My answer: 0 3. The numbers are 2 and 5. ????????? 4. The black die has 2 and the
asked by Anonymous 
Physics
The energy of the first excited state of a hydrogen atom is 0.34 eV ± 0.0003 eV. What is the average lifetime of for this state?
asked by Paul 
Physics
Two cars pass a school when a stopwatch reads zero. They both travel in the same direction. Car A travels at a constant speed of 98 km/h and Car B travels at 64 km/h. How many meters apart are the two cars when the stopwatch reads 2.0 hours?
asked by Erin 
English
Why should people speak up and address issues that matter in the world today? Give examples
asked by Anonymous 
math
how do you integrate 3e^1?
asked by Hannah 
G.7 Math
Hey guys I need help with subtracting integers. A) (8)  (6)= B) (9)  (6)= C) (3)  (7) D) (23) (8) E)(90)  (50) F)(17) (23) G)(40)  (25) H) (2) (100) I)(33)  (18)
asked by Harmony Ann 
Social Studies
10. Which of the following was Daniel Webster speaking of when he declared, "Liberty and Union, now and forever, on and inseparable!"? A) regional differences*** B) international differences C) improved transportation D) improved industry Is my answer
asked by Sam 
Physics
Sound is emitted by a point source. You wish to compare the sound intensity and sound intensity level from this source at two different sites. If the distance to the second site is a factor of 6 greater than the distance to the first, determine the
asked by ddsMom 
c. algebra
How many years would it take a worker making $16.00 per hour to earn $8,000,000, assuming she works 260 8hour days per year?
asked by Anonymous 
English Mrs. Sue
So I have my thesis statement down but now I just need examples about speaking up and why you need to address things in this world today. Can you please help. Thanks soooo much:))
asked by Anonymous 
Algebra 2
fourth root of (6848sqrt2)
asked by Hassan 
physics
A car is moving down a highway at 15 m/s and accelerating at 3 m/s^2. If it's initial position is at x = 0 m where will it be after 3 seconds?
asked by Michelle 
pre calculus
Which is worth more after 5 years, an investment of $1000 at 5% interest compounded semi  annually(twice a year). or an investment of $1000 at 5% interest compounded continuously?
asked by Raju 
physics
a block of wood of 200g is thrown vetically with a veloncity of 20mls what is the pontential energy?
asked by sience 
math
Select the first five terms in the arithmetic sequence an = 8n, starting with n = 1
asked by lee 
literary
What emotion is associated with weariness? I'm supposed to analyse the emotions that are expressed within a text, and the beginning is happy and jubilant while the second half adopts a more weary mood, so i'm wondering what emotion would i use?
asked by David 
Payback periods
purchase price 550,000, period of useful 10 years, annual revenue 100,000,operating costs 32,000, depreciation 55,000 no income taxes can you show me how to get the answer I have an answer but not sure if it is correct
asked by Carol 
baker
Americans are urged to make at least half of their grains whole grains. An example of a food with whole grains includes ______
asked by xd 
chemistry
what are the reaction steps of the reaction between ferric chloride with hydrogen at 600 degree celsius
asked by nivedita 
PHI103 WEEK 3
This is the name for the reasons that one presents to support a conclusion. (Points : 1) Proposals Premises Deductions Inductions None of the above
asked by NINA 
Alg 2
(1+sixthroot2  twelfthroot2) to the 1 power
asked by Kanayo 
Math
A simple calculation will reveal that 72 has 12 factors including 1 and 72. How many natural numbers less than 100 have 12 such factors
asked by Claire 
algebra
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.54 cross 10−5 watts/cm2
asked by samuel louijeune 
engligh, grammar
Why is this wrong? To succeed in the new economy, workers will have to learn throughout their careers, adapt to changing circumstances, and have selfmotivation.
asked by ML 
Quick English help
So I'm writing an essay about explaining why people should speak up and address issues that matter in the world today but I don't know what to say in each pargraph. (4 paragraphs) could someone help me?!? Thanks so much!!!
asked by Anonymous 
Chemistry (Analytical)
Solve for the number of grams of Ca2+ ion in a solution prepared by adding 1.00 gram of calcium oxalate (Ksp=1.3x10^8)powder to 100 mL at pH 9.
asked by Nathan Berry 
english literature
can you help me comment on this theme please. awe and amazement
asked by jason 
10th grade Science
Explain how a drug sits on acetylcholine receptors will affect muscle function? Is it because the drug would act as a blocking agent to prevent the receptors from gathering information on what to do?
asked by Student 
Math
Find Curvature, find the curvature k of the curve, where s is the arc length parameter. r(s)=(3+s)i+j
asked by jay 
trigonometry
If a tree casts a shadow of 12 feet at the same time that 6 foot person casts a shadow what is the length of the three to the nearst foot
asked by sandy 
math
Last month, Bill's electric bill was $80.77. This month, Bill's bill was $69.06. What is the percent decrease?
asked by Anonymous 
algebra 1
divide and simplify . 1. 5x^4/3 divided by 5x^2/6 2. 3/a^5 divided by 3/a^2 3. 6m^4/5 divided by 2m Can someone help me do these? and explain them? because I don't understand how to do them. thanks.
asked by Sadie 
Stats
How many ways to choose 2 boys and 3 girls from a class of 10 boys and 15 girls? Would you do: 10C2=45 15C3=455 (45)(455)=20,475?
asked by Ashley 
Algebra
I hope that I am typing this particular problem right because this algebra problem was provided on a chart. However, I can't copy and paste the chart on here. The problem says "The given graph represents the number of active servicemen in the region who
asked by Student5 
Chemistry (Analytical) followup
Thanks DrBob for answering the question! I was assuming it was something similar to that, but my confusion is that a follow up question is asking what happens to the dissolved Ca2+ if the pH is reduced to 2, so the pH has some effect, but I don't know
asked by Nathan Berry 
Geophysics
A continuous signal is sampled at regular intervals, every 10 ms. What is the maximum frequency that can be captured by this sampling process without incurring any distortion of the original signal? If the original signal contains noise at a frequency of
asked by Mia 
Physics
What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton
asked by Jake 
Algebra
The given graph represents the number of active servicemen in the region who are overweight. There were 3320 overweight servicemen in 1992, and 8310 overweight servicemen in 2002. Find the rate of change. The rate of change is ___? servicemen per year.
asked by Student5 
Precalculus
A pair of dice is rolled, one black and one white. Find the probability of each of the following events. 1. The total is between 3 and 7. My answer: 1/3 2. The total is 13. My answer: 0 3. The numbers are 2 and 5. ????????? 4. The black die has 2 and the
asked by Anonymous