Thursday
September 3, 2015

Posts by Anonymous


Total # Posts: 83,816

Physics
A child pushes tangentially on a small hand driven merry- go- round. She is able to accelerate it from rest to 18 rpm in 10 s. Modeling the merry go round as a uniform disk of radius 2.0 m and mass 800 kg, find the torque required to produce that acceleration. Neglect the ...
July 28, 2015

Geometry
Given a triangle with side lengths: root3, root3, 3, find the measure of its smallest angle.
July 28, 2015

Physics
The spin-drier of a washing machine slows down uniformly from 700 rpm (revolutions per minute) to 140 rpm while making 50 revolutions. Find the angular acceleration through these 50 revolutions. Express your answer in rad/s^2.
July 28, 2015

Physics
A belt passes over a wheel of radius 25 cm. If a point on the belt has a speed of 26 m/s. How fast is the wheel turning? Express your answer in rad/s.
July 28, 2015

government secondary school
maths:x^4+3x-2/(x^2+1)^3(x-4)=(Ax+B)/(x^2+1)+(Cx+D)/(x^2+1)^2+(Ex+F)/(x^2+1)^3+G/(x-4)+H/(x-4)^2.fine the value of ABCDEFGH,it a partial fraction o plz i need the solution urgently
July 28, 2015

Physics
physics
July 28, 2015

Physics
Romeo takes a uniform 11 m ladder and leans it against the smooth wall of the Capulet residence. The ladder's mass is 18.0 kg, and the bottom rests on the ground 2.8 m from the wall. When Romeo, whose mass is 79 kg, gets 90% of the way to the top, the ladder begins to slip...
July 28, 2015

Physics
A particle is projected from the surface of Earth with a speed equal to 2.4 times the escape speed. When it is very far from Earth, what is its speed? ?km/s
July 27, 2015

math
oh thanks the question had a mistake it was what you said reiny
July 27, 2015

math
The dimensions of a box are 9 by 16 by radical 25. Its volume is a. 60 b. 3600 c. √(50) d. √(60) please explain
July 27, 2015

math
A.16 B.25 C.36 D.100 These are the choices for the question
July 27, 2015

math
The square of a certain whole number N is N squared.If 60 is a factor of N squared ,its possible that xis not a factor of N squared.
July 27, 2015

English 9 grammar
1. Which of the following is grammatically correct? (mixed constructions) A) Even though the boy left early does not mean he was sick. >>B) Even though the boy left early, it does not mean he was sick. 2. Which of the following is grammatically correct? (parallelism) A) ...
July 27, 2015

English Vocab 9
is number 6 B?
July 27, 2015

English Vocab 9
are all the rest right?
July 27, 2015

English Vocab 9
Jessica gave a ___________ account of the conversation she'd had with the police. ----A) verbatim B) decorous C) dilatory D) munificent 2. The _________ old apple seller on the street corner used to scare Sarah. A) copasetic B) pulchritudinous ---C) wizened D) ...
July 27, 2015

Developing Healthy Eating Habits
D is the right answers
July 27, 2015

English 9
Hi teacher/ i posted this question and i am confused is number 1 A or C because they are kind of opposites.
July 27, 2015

English 9
1. Jessica gave a ___________ account of the conversation she'd had with the police. A) verbatim B) decorous ----C) dilatory D) munificent 2. The _________ old apple seller on the street corner used to scare Sarah. ------A) copasetic B) pulchritudinous C) wizened D) ...
July 27, 2015

pre-calculus
- sqrt of 2 over 2
July 27, 2015

Math
The question is how many kg of the first alloy must be used... So my answer is 2kg of first alloy, 4kg of 2nd alloy and 4kg of 3rd alloy resulting to 10kg.
July 27, 2015

Math
I don't think they should be equal to 10. kg of 1st alloy + kg of 2nd alloy + kg of 3rd alloy = 10 kg I got an answer, my answer is 2kg.
July 27, 2015

Nat Sci
???
July 26, 2015

Nat Sci
why when the granite decompose it converts to clay? and what is the simplest meaning of B horizon. i dont fully understand the things i've read about b horizon on net. please help me
July 26, 2015

organic chemistry
What does delocalization mean? what is the difference between non delocalizabe and delocalizable? Thank you in advance..
July 26, 2015

math- partial fractions
oops the first one should be s^2 +1
July 26, 2015

math- partial fractions
how do you i do the partial fraction for 1/(s^2)(s^2 +2s +3)
July 26, 2015

statistics
A lottery offers one $10000 prize, one $5000 prize and five $1000 prizes. 1000 tickets are sold at $30 each . Find the expectation if a person buys one ticket workings: 9970/1000+4970/1000+4850/1000-29790/1000 = -10000/1000 =-$10
July 26, 2015

calculus problem I have tried 100 times
A tank in the shape of an inverted right circular cone has height 5 meters and radius 4 meters. It is filled with 2 meters of hot chocolate. Find the work required to empty the tank by pumping the hot chocolate over the top of the tank. The density of hot chocolate is δ=...
July 26, 2015

maths
64
July 26, 2015

writing
15. Once you acquire these two basic skills, you'll be able to transform a vague idea in your mind into a coherent piece of writing.
July 26, 2015

PHI 103
25. <21{8[1(07)95]}> Political science professor: Many people insist that the Internet is revolutionizing the political process. They argue that Internet debates and online political polls and chat rooms give people greater access to political information. And they’...
July 25, 2015

stats
The average GRE score for math in a sample of students is 490. When you create a 95% confidence interval around this average, the lower limit is 260. What is the upper limit for this 95% confidence interval?
July 25, 2015

statistics
Of the Statistics graduates of a University 30%, received a starting salary of $45,000.00. If 5 of them are randomly selected, find the probability that all the graduated had starting salary of $45,000.00.
July 23, 2015

Finance
dfjghjh.kjkl
July 23, 2015

History
27
July 23, 2015

algebra
$50,000 was invested in bonds at %6and stocks at 8%. how much money was invested in each if the total return was $32,000?
July 23, 2015

life orientation
Im reaserching on how one another should engage in a protest, when ever there is an issue before or during a protest in the community?
July 23, 2015

basic math
The tank for a car holds 12 gallons. The gasoline gauge shows the tank is 14 full. How much gas is still in the tank?
July 23, 2015

Physics/ Chemistry
The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an anti-neutrino. ...
July 22, 2015

Physics
We commonly see Superman being shot and bullets bounce off of him. Suppose Mr. Bad shoots Superman with 4.00 kg bullets at a rate of 100 bullets/min for 9.00 s. If the speed of each bullet is 480.00 m/s and rebounds straight back with no change in speed, calculate the ...
July 22, 2015

Physics
An example of an elastic collision is The gravitational slingshot effect . A spacefship of mass 850 kg is moving at 9.5 km/s in the +x direction. It approaches the planet Saturn, mass 5.68 x10 26kg , which is moving in the –x- direction as shown in the figure. The ...
July 22, 2015

Physics Momentum: Elastic Collision
The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an anti-neutrino. ...
July 22, 2015

Physics
A 7900 kg truck traveling east at 5 m/s collides with a 1650 kg car traveling 300 south of west at 20 m/s. After the collision at what angle do the two vehicles move. Express you answer in degrees from the positive x-axis. Use a coordinate where north is the +y axis and east ...
July 22, 2015

Math Check
no
July 22, 2015

chemistry
5.85gm of NaCl is dissolved in water and the solution is made up to 0.5 litre. what is the molarity of solution ????
July 22, 2015

College Alg
ax+4 -7=0 (1,-2) and (-6,3)
July 22, 2015

Physics
A 2.1-kg 15-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. A rope of negligible mass is wrapped around it and pulled with a force of 14 N. (a) Find the magnitude of the torque exerted by the rope. ?N · m (b) Find the angular ...
July 21, 2015

Biology
a) Initial filtration occurs when blood pressure forces fluid out of the __________ and into __________. b) Blood enters the glomerulus through the __________ and leaves through the __________. c) Describe what normally passes into Bowman's capsule. d) What substances are ...
July 21, 2015

Physics
A steel ball of mass m1 = 1.1 kg and a cord of length of L = 2.3 m of negligible mass make up a simple pendulum that can pivot without friction about the point O, as in the figure below. This pendulum is released from rest in a horizontal position, and when the ball is at its ...
July 21, 2015

math
P=2L+2(L-2)=4L-4 so which of the following is an integer? (1998/4-1) (1999/4-1) (2000/4-1) (2002/4 -1)
July 21, 2015

math
seems to me all are true. it is an even power of x,y so either x=y or x=-y if x=y, then a thru d are true if x=-y, then a,b,c are true, but d is not true unless x=-y and x=+-1 so, the answers are a,b, c for any x and y.
July 21, 2015

math
let l be the border width. Then the total area of the new picuture with border is.. Areatotal=areapicutre+areaborder. areaborder=(12+2L)(16+2L)-12x16 288=24L+32L+4L^2 so solve for L, and the length of the fram is 16+2L
July 21, 2015

english literature
hi i have written a review below but its word limit is very high. please help me reduce it to around 200 words or a bit more. thanks in advance. 1. Introduction: Overwhelmed by political intrigue, confronted by a world adversarial to moral sensibilities, the play dramatizes ...
July 21, 2015

Statistics
A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true proportion of all voters in the state who favor approval.
July 20, 2015

Physics
A 14 g bullet is fired into the bob of a ballistic pendulum of mass 1.6 kg. When the bob is at its maximum height, the strings make an angle of 60° with the vertical. The length of the pendulum is 2.3 m. Find the speed of the bullet. ?m/s
July 20, 2015

math
isnt that 13.20
July 20, 2015

math
At the rate of $.80 cents per $100, how much does it cost to insure a car against fire and theft for $ 1650
July 20, 2015

Probability/Statistics
1) 2800 2) combination 3) 2700 4) becomes all the same, 1 outcome of final 5) 1/4 ??????
July 20, 2015

Science
Final of geography
July 20, 2015

Algebra1
consider the point p (-2,1) and the line l: x+y=2 find slope of l
July 20, 2015

social studies
some parts of spain remained under muslim control for
July 20, 2015

physics
A golf cart has an acceleration of 0.4 m/s². What is its velocity after it has covered 10 m starting from the rest?
July 20, 2015

physics
The driver of a train traveling at 30 m/s applies the brakes when he passes an amber signal. The next signal is 1.5 km/h down the track and it reaches 75 seconds later. Assuming uniform acceleration, find the velocity of the train at the second signal.
July 20, 2015

ethics
Which of the following examples best demonstrates to most people that ethical progress has taken place over the past 200 years? (Points : 1) Laws that prohibit discrimination based on race Laws that have increased speed limits Laws that prevented women from voting Laws that ...
July 20, 2015

organic chemistry
what is the principle involved in the detection of phosphorus? the visible result of it is canary yellow
July 19, 2015

english
Select the choice which best identifies the given passage from "The Cask of Amontillado." "I forced the last stone into its position; I plastered it up. Against the new masonry I re-erected the old rampart of bones. For the half of a century no mortal has ...
July 19, 2015

French
Remplissez les tirets avec la bonne forme de "lequel" If my answers are correct. 1) C'est un travail a propos(de) duquel nous ne sommes pas d'accord. 2) Les bureaux auxquels j'ai envoye (a) une demande d'emploi ne m'a pas repondu 3) Il y a un ...
July 19, 2015

Business Stats
The average life expectancy of Canadian women is 75 years, and is normally distributed. The standard deviation is known to be 7 years. If a random sample od 49 women is taken, what is the probability that the average age of the sample of women is: Between 73.5 and 76 years? ...
July 19, 2015

organic chemistry
How will i know if the r group's common name is tert-pentyl or sec-penytl? What is the difference between sec and tert?
July 19, 2015

Stats
4) The amount of Jen’s monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile.
July 18, 2015

electronic comerce
a software surveys users reading interests, then uses machine learning to find new web pages and new articles
July 18, 2015

math
If j is the number of integers between 1 and 500 that are divisible by 9 and k is the number of integers between 1 and 500 that are divisible by 7 what is j+k.
July 18, 2015

math
6AA*8=50B4 If A and B represent distinct digits in this correctly worked multiplication problem what is the value of B.
July 18, 2015

Math
You know the vertex is at (1.5,20) You know it passes through (0,0) Use symmetry to draw the other half of the parabola. It also passes through (3,0)
July 18, 2015

Chemistry
A. 0.93 B.
July 18, 2015

math
first question: Do you know what the theorem states?
July 18, 2015

math
Given f(x) > 0 with f ′(x) > 0, and f ′′(x) > 0 for all x in the interval [0, 3] with f(0) = 0.1 and f(3) = 1, the left, right, trapezoidal, and midpoint rule approximations were used to estimate the integral from 0 to 3 of f of x, dx
July 17, 2015

calculus
The temperature of a hard boiled egg varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A, where T is the temperature of the egg, A is the room temperature, and k is a positive constant. If the egg cools from 100°C to 90°...
July 17, 2015

calculus
Find the particular solution to y ′ = sin(x) given the general solution is y = C − cos(x) and the initial condition y(pi/2)=1
July 17, 2015

calculus
The rate of decay in the mass, M, of a radioactive substance is given by the differential equation dM dt equals negative 1 times k times M, where k is a positive constant. If the initial mass was 100g, then find the expression for the mass, M, at any time t.
July 17, 2015

physics
you know that s(t) = 4.9t^2 so, it takes x=sqrt(4.5/4.9) seconds to hit. You want s(x) - s(x-1)
July 17, 2015

math
Simon and Jimmy had 167 stamps altogether. Simon gave 4/7 of his stamps to Trina, and Jimmy gave 37 stamps to Trina. Simon and Jimmy had the same number of stamps left. How many stamps did Jimmy have in the beginning? I need you to show me how you did it because I have trouble...
July 17, 2015

maths
an electronic device makes a beep after every 60 seconds,another device makes a beep after every 62 seconds.they beep together at 10 am.the time when they will next make a veep together at the earliest is?
July 17, 2015

maths
i had 30 candies on monday. on wednesday, i have 19. bekka took some from me on tuesday. how much did she take?
July 17, 2015

geometry
 In the accompanying diagram, triangle ABCis similar to triangle DEF, AC = 6, AB = BC = 12, and DF = 8. Find the perimeter of triangle DEF.  
July 16, 2015

calculus
Newton’s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75°F which is placed into a ...
July 16, 2015

Psychology
1)The Peabody Picture Vocabulary Test-Revised is used to Select one: a. determine a child’s reading level b. determine a deaf child’s understanding of words c. identify people with communication difficulties d. identify children who should skip a grade b 2)Which of ...
July 15, 2015

Psychology
thanks
July 15, 2015

Psychology
Which of the following factors will not affect how a person does on an IQ test? Select one: a. How much sleep he/she had the night before b. None of the above c. What kind of mood that person is in d. Whether that person had anything to eat that day I am thinking c.
July 15, 2015

Algebra 2
Evaluate 20(0.5)^(n-1) when n= 3 to 12. Use sigma notation .
July 15, 2015

Biology
Breaks down proteins into polypeptides and amino acids What is the component?
July 15, 2015

biology
Activates conversion of pepsinogen to pepsin. What is the component? What is the secretion?
July 15, 2015

economics
3. Suppose that the total monthly demand for golf services is given by Q = 20 – P The marginal cost to the firm of each golfer is $1. If this demand function is based on the individual demands of 10 golfers, what is the optimal two part pricing strategy for this golf club...
July 15, 2015

Physics
The force F sub x acting on a particle is shown as a function of X. If an object starts at the origin (of a graph) moving to the right with a kinetic energy of 45.5 J, how much kinetic energy does it have at x = 3.0 m ? I have no clue how to do about solving this. Any help ...
July 15, 2015

Math
If 3 pounds of apples costs .99 how much does 2 pounds costs?
July 15, 2015

Math
What price do we charge a patient if the AWP for 300 tablets is $14.55 and we want to give the patient 30 tablets plus a 6% markup and a $3.00 dispensing fee?
July 15, 2015

Calculus Partial Derivatives
Verify that the sum of three quantities x, y, and z, whose product is a constant k, is maximum when these three quantities are equal.
July 15, 2015

Economics
quality, price, competition, substitutions
July 15, 2015

Math
You need to hire a part-time associate to work 30 hours a week in your store. You have $250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid $9.00 per hour. Your average part-time ...
July 15, 2015

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