Thursday

September 3, 2015
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*

**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*

**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*

**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*