Monday
August 31, 2015

Posts by Anonymous


Total # Posts: 83,674

problem solving
The specific heat of carbon (graphite) is 0.71 J/(g·°C). How much energy is given off as a 2 gram piece of graphite cools from 120°C to 20°C?
July 31, 2015

5th grade math
so is that the answer
July 31, 2015

5th grade math
is the first one 1 whole??
July 31, 2015

5th grade math
what can be a word problem that can be represented by the equation 1) 1/4 + 3/4=? 2- 7/8=?
July 31, 2015

maths literacy,life science,agriculture,history
hi guys i would like you to help with this quation, I am doing grade11 and doing the above subjects .I am wodering what should i major in at varsity something intresting.
July 31, 2015

Life orientation
Five interview question you will use to evaluate the understanding of service delivery protest by the learners in your school
July 31, 2015

math
-15+7
July 30, 2015

math
How many ounces of an alloy containing 30% gold on the world market must be added to 10 ounces of an alloy containing 5% to produce an alloy containing 20% gold?
July 30, 2015

math
there are 10 white socks and 6 black socks in a drawer. vic reaches into the drawer without looking and picks a white sock. he keeps the first sock out and reaches into the drawer again. to pick a second sock. what is the probability that the second sock vic selects will also ...
July 30, 2015

Math
You have to draw the figure to fully understand the problem. Since CE > CD, Pt E should be near pt B. Using sine law and cos law. You can get BE = 5.48
July 30, 2015

math
Henry are you saying it is wrong answer?
July 30, 2015

physics
A stone thrown vertically upwards from the top of a building takes 3s to reach its maximum height . Find 1. The velocity with which it is thrown 2.the maximum height it reaches above the builibg
July 30, 2015

spanish
Teresa ___ dio una camara a mi.
July 30, 2015

Math
34
July 30, 2015

Mahlogonolo
Mathematics on a cubic function what do the zeros on the graph mean
July 30, 2015

Math Important!
So it's: b=2a a=g-2 a=gw+2 There are 2 gw cards, so there must be 4 a cards. If there are 4 a cards, there must be 8b cards and 2 g cards. 8+4+2+2=16 So 16 is the answer.
July 30, 2015

science
That's would not work! any more difference?
July 29, 2015

calc
Let F of x equals the integral from 1 to 3 times x of the natural logarithm of t squared. Use your calculator to find F″(1).
July 29, 2015

computer
for an integer matrix, int trace(int *a,int n) { int t=0,i; for (i=0;i<n;i++) {t += *(a[i*n+i])} return t; }
July 29, 2015

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 2.5 m and mass 780 kg, find the torque required to produce that acceleration. Neglect the ...
July 28, 2015

Physics
A potter is shaping a bowl on a a potter’s wheel. The wheel rotaes at a constant angular speed. The frictional force between her hands and the clay is 1.25 N. How large is the torque she produces on the wheel if the diameter of the bowl is 13 cm.
July 28, 2015

Physics
Fred Flintstone’s club–ax is made up of two parts: an uniform 3.0 kg stick and a symmetrical 10 kg stone attached to the end of the stick. The dimensions of the club-ax are shown in the figure. How far is the center of mass from the handle end of the club-ax? Express...
July 28, 2015

Physics
A system consists of the following masses loacted in the xy- plane: 5.0 kg at the point (0,5), 7.5 kg at the point (3,8) and 6.5 at the point (-3, -6). Find the distance from the origin to the center of mass.
July 28, 2015

Algebra
The sum of the coefficients of any polynomial $f(x)$ equals $f(1)$, since letting $x = 1$ in any term $cx^n$ gives us the coefficient $c$. That is, if \[f(x) = a_nx^n + a_{n-1}x^{n-1} + \cdots + a_1x + a_0,\] then \begin{align*} f(1) &= a_n\cdot 1^n + a_{n-1}\cdot1^{n-1} + \...
July 28, 2015

Physics
A uniform solid sphere rolls along a horizontal frictionless surface at 35 m/s and makes a smooth transition onto a frictionless incline having an angle of 300. How far up the incline does the sphere roll when it comes to a momentary stop? Note for a sphere I= 2/5Mr2, where M ...
July 28, 2015

Physics
Three children are trying to balance on a seesaw. The seesaw is 3.9 m long and pivots about a rock at its center. Louie and Laura are already sitting on opposite ends. If Martha weighs 27 kg, where should she sit so as to balance the seesaw? 50kg kid--------------35kg kid...
July 28, 2015

AP Chemistry
24.6gFe2O3*molFe2O3/MolarmassFe2O3*2molFe/1molFe2O3= mol Fe
July 28, 2015

Physics
Its an angle of 30 not 300
July 28, 2015

Physics
A uniform solid sphere rolls along a horizontal frictionless surface at 35 m/s and makes a smooth transition onto a frictionless incline having an angle of 300. How far up the incline does the sphere roll when it comes to a momentary stop? Note for a sphere I= 2/5Mr2, where M ...
July 28, 2015

Physics
A bolt requires tightening to a torque of 98 N-m. If a wrench is 28 cm long, what perpendicular force should be applied at its end?
July 28, 2015

maths
Volume of tank V = 4πradius^3/3 where radius of tank=1.5 m Pipe radius, r = 0.3 m pipe length (per second)=0.2 m Volume per second, v= πr^2*L Time = V/v in seconds.
July 28, 2015

math
please solve x- 11/21= -10/21
July 28, 2015

Physics
A system consists of the following masses loacted in the xy- plane: 5.0 kg at the point (0,5), 7.5 kg at the point (3,8) and 6.5 at the point (-3, -6). Find the distance from the origin to the center of mass.
July 28, 2015

Geometry
The area of a right triangle is 36. What is the shortest possible length of its hypotenuse? A.6 B.root72 C.12 D.none of these
July 28, 2015

Logic
This is the information about students participating in a field trip: 36 were female students, 13 were male seniors, 41 were not drama majors, exactly half of the drama majors were male, a third of the female students were drama majors but not seniors, there were 15 senior ...
July 28, 2015

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

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