Thursday
March 5, 2015

Posts by anonymous


Total # Posts: 78,564

physics
A 0.60 kg object with an initial velocity of 3.0 m/s in the positive x direction is acted on by a force in the direction of motion. The force does +2.5 J of work. What is the final velocity of the object?
February 8, 2015

Math
A jet pilot is making a 1000 mile trip in her military Tomcat. She flies 800 mph for one hour and decides she wants to finish the trip so that she would have flown at an average of 1000 mph. How fast should she go to finish the trip and meet her goal?(Hint: Think carefully ...
February 8, 2015

Math
Find all pairs of integers whose difference is 5 and product is 234.
February 8, 2015

Math
The sum of two counting numbers is 243. Half of one number is four times the other number. What are the numbers? 121.1+122.2=243.2
February 8, 2015

math
A recipe for 1 batch of muffin included 2/3 cup of raisins. Ina made 2 1/2 batches of muffins. How many cups of raisin did she use. Is the answer 1 5/6
February 8, 2015

finite math
Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, five green ones, four white ones, and three purple ones. She grabs eight of them. Find the probability of the following event, ...
February 8, 2015

college algebra
4rrr
February 8, 2015

Physics
A light string is attached to both a hanging mass m1 = 5 kg and to a pulley of mass m2= 6 kg, and radius R = 0.75 m. If the pulley is a solid disc rotating about its center with a moment of inertia of I = 0.5*m2R2, and the string does not slip on the pulley, (a) what is the ...
February 8, 2015

physics
In the lab, a relativistic proton has a momentum of 1.00 × 10-19 kg · m/s and a rest energy of 0.150 nJ. What is the speed of the proton in the lab? (c = 3.00 × 108 m/s, m proton = 1.67 × 10-27 kg): *
February 8, 2015

Chemistry
For a one step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the enthalpy of reaction is -20.0 kJ mol-1. Calculate the activation energy for the reverse reaction. Is my answer correct? (40 kJ mol-1)-(-20 kJ mol-1) = 20kJ mol-1
February 8, 2015

PreCalculus
Can someone help me answer this question, so I would know what to do for a question like this next time? Thank you! A box contains 10 red chips, 20 blue chips, and 30 green chips. If 5 chips are drawn from the box, find the probability of drawing a.) exactly 4 green b.) at ...
February 7, 2015

physics
The velocity-versus-time graph is shown for a particle moving along the x-axis. Its initial position is x0 = 1.8m at t0 =0s. Part A What is the particle's position at t=1.0s? Part B What is the particle's acceleration at t= 1.0s? Part C What is the particle's ...
February 7, 2015

physics
A 0.25 kg particle moves along an x axis according to x(t) = - 10 + 3 t + 2 t2 - 5 t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.6 s ? Give an expression for the (a) x, (b) y and (c) z components.
February 7, 2015

Probability
Can someone help me answer this question, so I would know what to do for a question like this next time? Thank you! A box contains 10 red chips, 20 blue chips, and 30 green chips. If 5 chips are drawn from the box, find the probability of drawing a.) exactly 4 green b.) at ...
February 7, 2015

Probability
Can someone please help me solve this problem? If the probability of a baseball player's getting it in one time at bat is 0.326, find the probability that the player gets no hits in 4 times at bat. Thank you!
February 7, 2015

chemistry
Benzoic acid reacts with water to form the benzoate ion by the following reaction C6H5COOH(aq) + H2O(l) ⇀↽ C6H5COO−(aq) + H3O +(aq) The equilibrium constant for this reaction is 6.4 x 10−5 . In a 0.1 M solution of benzoic acid, what is the concentration...
February 7, 2015

chemistry
A soluction of 100 mL of 0.2 M NH3 is titratedwith 50 mL of 0.5 M HNO3. What is the pH of the resulting solution? Kb for NH3 is 1.8 × 10−5 1. 5.30 2. 1.00 3. 1.48 4. 10.3
February 7, 2015

chemistry
Which of the following has the HIGHEST pKa? 1. HClO3 2. HBrO 3. HClO 4. HIO 5. HClO4
February 7, 2015

chemistry
What would be pH of a 0.01 M solution of a very expensive weak base, unobtainamine, whose pKb is 3.8? 1. 2.9 2. 14 3. 2 4. 7 5. 11.1
February 7, 2015

chemistry
Arrange the acids I) hydrogen selenate ion (HSeO− 4 ), pKa = 1.92; II) phosphorous acid (H3PO3), pKa1 = 2.00; III) phosphoric acid (H3PO4), pKa = 2.12; IV) selenous acid (H2SeO3), pKa = 2.46; in increasing order of strengths. 1. IV, III, II, I 2. II, IV, III, I 3. I, III...
February 7, 2015

chemistry
The term “Ka for the ammonium ion” describes the equilibrium constant for which of the following reactions? 1. NH3 + H2O ⇀↽ NH4 + + OH− 2. NH+ 4 + OH− ⇀↽ NH3 + H2O 3. NH3 + H3O + ⇀↽ NH+ 4 + H2O 4. NH+ 4 + H2O ⇀&#...
February 7, 2015

chemistry
Which of the following is the STRONGEST acid? 1. CH3COOH 2. CH3CH2OH 3. CHCl2COOH 4. CH2ClCOOH 5. CCl3COOH
February 7, 2015

math
You need to give 6mg of a drug, The drug on hand has a concentration of 24mg per ounce. How many teaspoons will you give?
February 7, 2015

writting skills
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.      A. Describing people and writing conversation B. Using the Internet and the on-line catalog C. Doing interviews and ...
February 6, 2015

Math
if z=3i and w=5i, then z<w. True or False?
February 6, 2015

writting skills
The World Almanac is a book of      A. facts and statistics. B. living notable Americans. C. synonyms. D. articles published in magazines.  
February 6, 2015

Chemistry- Acid Base
What is the conjugate acid of O2^-2
February 6, 2015

math
x2 + x − 42
February 6, 2015

Chemistry
Thank you anyways, I apologized for not giving enough information but I found that the answer is False.
February 6, 2015

Chemistry
After the volatile liquid has been added to the Erlenmeyer flask, the total pressure in the flask equals the vapor pressure of the volatile liquid. True or False?
February 6, 2015

spinner
packing a suitcase with 3 different color sweatshirts only have room for 2 sweatshirts in the suitcase how many different combinations of 2 sweatshirts could be pack
February 6, 2015

chemistry
a block of metal with dimensions of 5.6 cm and 11 cmm weights 5.55 kg.what is the density of the metal
February 6, 2015

social studies
what was one important political result of the Canadian constitution of 1982
February 6, 2015

math
How long will it take to earn $252 in interest if $1200 is invested at a 7% annual interest rate?
February 6, 2015

math
A man sold 3/5 of the goods at 20% loss, at what profit% should he sell remaining goods to get 10% profit on the whole?
February 6, 2015

Crime and Society
What do you think best explains high incarceration rates for Blacks compared to their percent of the general population.
February 6, 2015

Crime and Society
What explains the high incarceration rates for Black men?
February 6, 2015

Crime and Society
Is institutionalized racism to blame for these disparate rates?
February 6, 2015

Crime and Society
What explains high incarceration rates for Blacks on death row?
February 6, 2015

English
Reread lines 9-12 in “I Ask My Mother to Sing.” What idea is suggested by the image of the water lilies filling with water, spilling it into the lake, and filling it up again? Consider the event described in the final stanza. What are some ideas? I know it has ...
February 6, 2015

math
Place the numbers below on a number line: ∛7 , -3 , 0 , 105/59 , 7^1/3 , 7^2/3 I tries: ∛7 = 1.912 -3 0 105/59 = 1.779 7 1/3 = 7.33.. <-- right? 7 2/3 = 7.66.. <-- right? first of all ,does the answer i convert right?
February 6, 2015

math
Alyssa claims that dividing by 4/5 is the same thing as multipying by 5 then dividing by 4. Is she correct?explain why or why not
February 5, 2015

Physics
Determine the ratio of Earth's gravitational force exerted on an 80-kg person when at Earth's surface and when 1000km above Earth's surface. The radius of Earth is 6370 km. I have tried (6370)^2/(7370)^2 = 0.747 and it is wrong??
February 5, 2015

geometry
2. A person who is 1.5 meters tall casts a shadow that is 8 meters long. The distance along the ground from the person (N) to the flagpole (G) is 32 meters. Find the height of the flagpole (FG) showing all calculations.
February 5, 2015

(REALLY NEED HELP )
7x + 4
February 5, 2015

math
Alyssa claims that dividing by 4/5 is the same thing as multiplying by 5 then dividing by 4. Is she correct
February 5, 2015

science
m=0.0045kg E=3.6 J for .13m compression T=? Vm @ .05m from equilibrium= ? P.E.= .5KA^2 therefore find K=F/x (.0045x9.8)/(.13) K =.34N/m T=2pixsprt(m/K) T= 2xpi x sprt (.0045/.34) T= .72 secs B) E=PE+KE 3.6= .5 (3.4)(0)^2 + .2 (.0045)(v^2) v^2=1600 v=40
February 5, 2015

English
Describe the setting of “Grape Sherbet” as you visualize it. A graveyard with a family? Also, is the father dead or alive. I know this is happening on Memorial Day, but it doesn't seem clear whether the father is dead.
February 5, 2015

Calculus
Find the anti-derivative of the integral [3sqrt(x)(2x^2-4)]dx
February 5, 2015

physics
A person walks up a stalled 15 m long escalator in 110 s. When standing on the same escalator, now moving, the person is carried up in 70 s. How much time would it take that person to walk up the moving escalator?
February 5, 2015

Calculus
Find the anti-derivative of the integral (7tan^2x+12)dx
February 5, 2015

Calculus
Find the anti-derivative of the integral [(7t^2+6t-15)/t^4]dt
February 5, 2015

Calculus
Solve the differential equation f"(x)=x^2, f'(0)=3, f(0)=-1
February 5, 2015

Math
There were 100 children at a carnival. 60 of them were boys. Express the number of girls as a fraction of the total number of children at the carnival
February 5, 2015

art
My text book only spoke of how he didn't use sponsorship and then relied on funds from his own sources (such as selling art pieces). It is so true what you are saying Ms. Sue, and I thank you so much for helping me. I will speak it over with my art teacher tomorrow in ...
February 5, 2015

art
A then?
February 5, 2015

art
9. Why did artist Christo think it was important not to rely on any donors when he wrapped the Miami islands in pink? A. Christo was independently wealthy and did not need donors. *** B. Christo wanted to prove he could do everything on his own, independently. C. Christo ...
February 5, 2015

English
An overused expression is a
February 5, 2015

Calculus
I am in a car and travel for 12 minutes. Below are the speeds in mph, recorded every two minutes. Use trapezoids, right-bound rectangles, and midpoint rectangles to estimate the distance I traveled. Min 0 2 4 6 8 10 12 Speed 20 22 35 46 50 50 20 Trapezoids: Right-bound ...
February 5, 2015

language arts
in the poem the sidewalk racer how does the speaker feel
February 5, 2015

physics
A ferryboat is traveling north with a speed of 5.50 m/s relative to the water. A passenger is walking with a velocity of 2.50 m/s due east relative to the boat. What is the velocity (magnitude only) of the passenger with respect to the water?
February 5, 2015

math
what is the mystery number?greater than 1oo -odd more than 3 tens less than 150 the sum of the digits is 12?? please help
February 5, 2015

Math
Oh I was looking at just the 0. I understand Thank you!
February 5, 2015

Math
would 1,661.06 turn into 1,661 if I rounded it to the nearest tenth ?
February 5, 2015

Math
never mind I got the answer. It's c.. I was confusing myself lol
February 5, 2015

Math
oops i meant its a triangle and pentagon put together
February 5, 2015

Math
What's the value of the missing angle *picture of a triangle and square put together which basically makes a hexagon. angles are 90 degrees, 90 degrees, 130 degrees, 130 degrees. I have to find the last angle.* A. 50 degrees B. 60 degrees C. 100 degrees D. 240 degrees I ...
February 5, 2015

social studies 8 ANSWER PLEASE!!!!!!!!
Its d. National road
February 5, 2015

art
Thanks for the help bros
February 5, 2015

art
Thanks for the help bros
February 5, 2015

art
help?thanks, 3 and 9 were both c?
February 5, 2015

art
So #3 was c and so was #9? Great! :)
February 5, 2015

art
What were the rest of the answers ?
February 5, 2015

art
Which ones were wrong?
February 5, 2015

art
#3 is C and #9 is C as well
February 5, 2015

english (check my answer)
What is a key characteristic of a refrain in a poem? a. imagery b. alliteration c. repetition d. rhyme I think it's c?
February 5, 2015

Maths
Have you found the answer yet?
February 5, 2015

physics
As you walk to class with a constant speed of 1.65m/s , you are moving in a direction that is 18.8∘ north of east. How much time does it take to change your displacement by 21.0m east?
February 5, 2015

American history
Which of the following is true with regards to the navigation acts by the eighteenth century
February 5, 2015

english
You are chosen to debate the motion " boys should not help in the kitchen" write fir the motion.
February 5, 2015

bmath
92
February 5, 2015

math
ans
February 5, 2015

chemistry
A gas sample occupies a volume of 400.0ml at 298.15k at costant pressure. what is the final temperature when the volume occupied decreased by 39.0
February 5, 2015

physics
Three point charges are arranged along the x-axis. Charge q 1 = +3.00 ìC is at the origin, and charge q 2 = -5.00 ìC is at x = 0.200 m . Charge q 3 = +8.00 ìC . Where is q 3 located if the net force on q 1 is 7.00 N in the −x direction?
February 4, 2015

algebra
a dvd costs twice as much as a music cd. jack buys 2 dvds and 2 cds and spends 45 dollars. determine how much one cd costs
February 4, 2015

Math
Using five 2's make the following numbers: 1 5 7 9 Thank you for your help
February 4, 2015

Math
Using five 2's make the following numbers: 1 5 7 9 Thank you for your help
February 4, 2015

Criminal investigation
What is grand larceny
February 4, 2015

Math
Ted bought items that cost $5.89 and $15.38.What was the total cost including 6% sales tax? Explain how how got our answer.
February 4, 2015

materials science
its fine
February 4, 2015

materials science
idk!!!
February 4, 2015

materials science
what are the two sources of electricity on the atoll of utrik that are not based on fossil fuels?
February 4, 2015

math
Caitlyn bought a helium tank to fill spherical balloons for a party. If the diameter of the filled balloons are 14.4 inches, how much helium would be needed in each balloon?
February 4, 2015

science
an object was placed into a container of water. the arrow shows that thermal energy is flowing from the water to the object. what is a valid conclusion
February 4, 2015

Science
1)What is the relationship between inertia and mass? 2)Jellyfish sometimes squeeze in the side of their bodies.This pushes a stream of water from the back end of their bodies,according to newtons third law of motion,How will this behavior affect the movement of the jelly fish...
February 4, 2015

physics
3369800
February 4, 2015

Chemistry
If a temperature increase from 11.0∘C to 22.0∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction?
February 4, 2015

math
x,y
February 4, 2015

math
which variable is usually associated with the concept of output
February 4, 2015

Math
whats the standard form of a linear equation?
February 4, 2015

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