Friday

February 27, 2015

February 27, 2015

Total # Posts: 78,219

**Chemistry**

The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 8.30 g of naphthalene (C10H8) in 320. g of benzene (Kf of benzene = 4.90°C/m)?
*February 11, 2015*

**science**

plz help
*February 11, 2015*

**science**

describes the movement of an object at rest if no outside forces act on it? a; it will move due to inertia b; gravity will eventually cause it to move c; it will stay at rest due to inertia d; it will stay at rest due to gravity...
*February 11, 2015*

**Math - Answer Check**

Write the composition function and then find the value. f(x) = 2x+3 g(x) = x^2 k(x) = square root(x - 4) 1. g(k(x)) g(k(20)) My answer: Function is x - 4, the value is 16. 2. f(g(x)) f(g(2)) My answer: Function is 2x^2 + 3, the value is 11.
*February 11, 2015*

**math**

I tries to figure out the answer you give but i just got more confuse.. where it 7^-(1/5)
*February 11, 2015*

**math**

what is mean when the question ask find a*b-a ?
*February 11, 2015*

**math**

7^5/7(5/7) * 7 ^3/5 <-- I don't understanding this part?
*February 11, 2015*

**math**

7^-(1/5) / 7^-(7/5) * 7^3/5 can be simplified as 7^a/b where a and b are positive integers. find a*b-a i'm not good when it come to negative exponent, plz help!
*February 11, 2015*

**government**

Who are the top 5 most important members of the Executive Office of the President?
*February 11, 2015*

**Physics**

Why does the potential inside a solid conductor not change?
*February 11, 2015*

**Physics**

Does the potential inside a hollow conductor change and why?
*February 11, 2015*

**Check answers**

?
*February 11, 2015*

**marketing**

the first step in taking control of your finances is
*February 11, 2015*

**Geography**

new found planet
*February 11, 2015*

**Calc**

Find the solution to e^x = 2+2x
*February 11, 2015*

**science**

vertical velocityinitial=35sin35 horizoal velocity=35cos35 time in air consider vertical hf=hi+vi*t-1/2 g t^2 0=0+35sin35*t-4.8t^2 solve that with the quadratic equation.. max height is when vv=0 vv=vi*35sin35-gt=0 solve for time at max height, then maxhdight=35sin35*t-1/2 g t^2
*February 11, 2015*

**science**

A golf ball leaves the club 35m/s at an teta of 35 degree above the horizontal . Find a) range b) maximum height reached c) time of flight
*February 11, 2015*

**math**

The shadow of an electric pole is 5 m. long when thr angle of elevation of the seen is 60 degrees. Find the length of the shadow when the angle of elevation of the seen is 45 degrees
*February 11, 2015*

**math**

eddie made a beaded necklace for his mother. every third bead is blue. every seventh bead is green. all the remaining beads are white. there are 20 beads in all. how many beads are blue? green? white?
*February 11, 2015*

**Physics**

I dont Know
*February 10, 2015*

**physics**

Mary applies a force of 71 N to push a box with an acceleration of 0.57 m/s2. When she increases the pushing force to 83 N, the box's acceleration changes to 0.86 m/s2. There is a constant friction force present between the floor and the box. a) what is the coefficient of ...
*February 10, 2015*

**math**

thank you
*February 10, 2015*

**math**

amelia made her vegetable garden in the shape of a square. each side is 32 feet long. amelia walked around her garden. how many feer did she walk in all?
*February 10, 2015*

**chemistry**

Electrolysis is carried out for 2.00 h in the following cell. The platinum cathode which has a mass of 25.0782 g, weighs 25.8639g after the electrolysis. The platinum anode weighs the same before and after the electrolysis. there is H2SO4(aq) on the anode side and AgNO3(aq) on...
*February 10, 2015*

**Math**

u need to say that u haven't completely solved the question , u dont if he's smart or not
*February 10, 2015*

**Math**

the question asks , who had the higher balance. u did not answer that
*February 10, 2015*

**Math**

ms. sue, u did not answer that question right
*February 10, 2015*

**Math**

There are 12 E's among the 100 tiles in Scrabble. What is the probability of selecting all 4 E's when selecting 4 tiles? One answer key says 1/735 while another says 3/23765, but I think it is the second one.
*February 10, 2015*

**Math**

(x^6z^-1/3/-125y^-9z^8/3)^-1/3
*February 10, 2015*

**math**

I'm in grade 5 and I need help on an area and perimeter question. The area of a rectangle is 300mm and the length of it is 15 mm. I need to find out the width of this rectangle.
*February 10, 2015*

**Math**

230 / 14 does not come out even
*February 10, 2015*

**Math**

15 * 12 = 180 14(410 - 180) = ? That wont work becuase there is only 410 tangerines.
*February 10, 2015*

**Math**

Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines were in each of the 14 ...
*February 10, 2015*

**Math**

is that a. or b.
*February 10, 2015*

**Math**

Packaging Tangerines The produce manager at the grocery store had 410 tangerines. He put some of them into 15 cartons containing 12 tangerines each. He then put the rest into 14 cartons, each containing the same number of tangerines. How many tangerines were in each of the 14 ...
*February 10, 2015*

**math**

what is 2 5/8 - 3 6/8
*February 10, 2015*

**Math**

6.5 c=. Fl oz
*February 10, 2015*

**Social studies**

Rosalin is preparing to interview for the job described in the ad her resume contains the give facts listed below which should she talk about in the interview as being most relevant to the job
*February 10, 2015*

**probabilitie**

Mary and Tom park their cars in an empty parking lot with n>=2 consecutive parking spaces (i.e, n spaces in a row, where only one car fits in each space). Mary and Tom pick parking spaces at random. (All pairs of parking spaces are equally likely.) What is the probability ...
*February 10, 2015*

**Math**

c-5 surely you had figured that out on your own...
*February 10, 2015*

**Math**

(120-80):80
*February 10, 2015*

**math**

(3*39.99 + 3*39.99/2)(0.75)(1.0438) = ?
*February 10, 2015*

**Math**

one of the numbers is even. an even multiple of any number is even.
*February 10, 2015*

**physics**

You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of the arch to be 7.31 ° above the horizontal. Approximately how far (in ...
*February 10, 2015*

**Math**

For an art exhibit, Craig has to choose 3 ceramic mugs out of the 7 that he made over the summer. In how many ways can he arrange these 3 mugs in a row? I'm not looking for the answer, but only an explanation for why this is a permutation problem and not a combination one.
*February 10, 2015*

**english**

Its A
*February 10, 2015*

**physics**

What is the mass of a man if he accelerates at 42 m/s/s and has a mass of 112 kg?
*February 10, 2015*

**chemistry**

I have 120 ml of a 2M NAOH solution. If Ionly use 10 ml the molarity of the 10 ml is stil 2M, correct?
*February 10, 2015*

**Anonymous**

input: 1 2 5 10 output: 7 11.5 25 47.5 What is a function rule?
*February 10, 2015*

**math**

Nicole is making a bowl of chex mix to serve to her guests .She has already put 45 cups of nuts,410 cups of raisins and 112 cups of chocolate chips in the bowl.If she wants to make 4 cups total ,how much chex cereal will she need to add?
*February 10, 2015*

**statistics**

The response to a question has three alternatives: A, B, and C. A sample of 120 responses provides 52 A, 29 B, and 39 C responses. Show the frequency and relative frequency distributions (use nearest whole number for the frequency column and 2 decimal for the relative ...
*February 10, 2015*

**Physics**

A coin rests on a record 0.15 m from its center. The record turns on a turntable that rotates at variable speed. The coefficient of static friction between the coin and the record is 0.30. What is the maximum coin speed at which it does not slip?
*February 10, 2015*

**chemistry**

Prove : Gr degree = 383 kj
*February 10, 2015*

**History**

What were three significant events related to ww1, I know there was the assassination but can someone help me find three to link to the main idea (WW1)
*February 10, 2015*

**chemistry**

How much work is done when 2.0 liters of CH4(g) undergoes combustion in excess oxygen at 0 degrees Celsius and 1.00 bar (assuming the volume of water formed is negligible)?
*February 9, 2015*

**University Physics II**

1. A voltage of 13 V is applied across the ends of a piece of copper wire 8 cm long. The mass of an electron is 9.11 × 10−31 kg and its charge is 1.6 × 10−19 C. What is the magnitude of the electron’s acceleration? Answer in units of m/s2. 2. After...
*February 9, 2015*

**Calculus**

Write the definite integral for the area of the region lying in the upper half of the ellipse given by 4x^2+y^2=4
*February 9, 2015*

**Calculus**

The rate of growth of a particular population is given by dP/dt=50t^2-100t^3/2 where P is the population size and t is the time in years. The initial population is 25,000. Find the population function. Estimate how many years it will take for the population to reach 50,000.
*February 9, 2015*

**Calculus**

An object has a constant acceleration of 72 feet per second squared, an initial velocity of 17 feet per second, and an initial position of 10 feet. Find the position function describing the motion of this object.
*February 9, 2015*

**Calculus**

Use a(t)=-32 ft/second squared as the acceleration due to gravity. A ball is thrown vertically upward from the ground with an initial velocity of 56 feet per second. For how many seconds will the ball be going upward?
*February 9, 2015*

**Calculus**

Use a(t)=-32 ft/second squared as the acceleration due to gravity. A ball is thrown vertically upward from the ground with an initial velocity of 96 feet per second. How high will it go?
*February 9, 2015*

**math**

Yuri has a rope 12 meters long. He cuts into pieces that are 2 meters long. What fraction of the rope is one piece?
*February 9, 2015*

**math**

Unroll has 6 yards of ribbon. She needs 1/5 to make 1bow. How many bows can she make? Explain how to write the equation an by using representation
*February 9, 2015*

**health**

1. Is Wrong(I just took the test) 2.Is right 3. Is not there
*February 9, 2015*

**health**

True or false the endocrine system only regulates long-term changes in the body True*** False Which endocrine glad(s) are responsible for the changes associated with puberty? A. thymus gland B. reproductive glands*** C. thyroid gland D. pancreas Please check
*February 9, 2015*

**math**

the grade of 8 students on a 10-point test were 1,3,5,5,7,8,9,10 comute the mean of these scores
*February 9, 2015*

**L.A**

Thank you
*February 9, 2015*

**L.A **

Which is the best phrase of these lines from "The New World"? eagles/hie and/hover/above/the plain A. Eagles hurry and hung above the flatland B.Eagles hang in midair and wave their wings C. Eagles race and rush in an ugly way D. Eagles soar and swoop in a simple, ...
*February 9, 2015*

**physics**

a basketball player tries to make a half court jumpshot releasing the ball at the height of the basket assuming the ball is lunch at 51 degrees 14 meters from the basket what velocity musta player give the ball
*February 9, 2015*

**physics**

a basketball player tries to make a half court jumpshot releasing the ball at the height of the basket assuming the ball is lunch at 51 degrees 14 meters from the basket what velocity musta player give the ball
*February 9, 2015*

**science**

the process in which an animal's cells use oxygen and digested food molecules to release the energy in food is called 1. breathing 2. cellular respiration 3. diffusion*** 4. gas exchange
*February 9, 2015*

**accounting**

What is the amount of the tax liability for a single person having taxable income of $59,200? All answers should be rounded to the nearest dollar.
*February 9, 2015*

**English**

What does the "larger dome" refer to in Today by Billy Collins? If ever there were a spring day so perfect, so uplifted by a warm intermittent breeze that it made you want to throw open all the windows in the house and unlatch the door to the canary's cage, ...
*February 9, 2015*

**Language Arts**

Poor restless dove, I pity thee; And when I hear thy plaintive moan, I mourn for thy captivity, And in thy woes forget mine own. To see thee stand prepared to fly, And flap those useless wings of thine, And gaze into the distant sky, Would melt a harder heart than mine. In ...
*February 9, 2015*

**Calc**

1.) Evaluate Lim x->0 (tanx/x) 2.) Find the equations of the lines that pass through the point (0,-2) and are tangent to the graph of y=x^2 3.) Find (d^2*y)/dx^2 and (dy/dx)^2, given that y=7x
*February 9, 2015*

**chemistry**

a 1.32g sample on unknown containing KHP as a component was titrated with 22.48mL of 0.105 M NaOH to a pheolphthalein end point. what is the weight percent of KHP in the unknown sample?
*February 9, 2015*

**enlish**

Africa is a huge continent with hundreds of different cultures. It's impossible to lump all "traditional African marriages" together!
*February 9, 2015*

**Social Studies**

C. d. b.
*February 9, 2015*

**Social Studies**

1.How does the amazon region best support the people of Brazil? a.by serving as a main artery of transportation b.by supplying fertile land for farming c.by providing forest rich with resources d.by protecting them from the encroachment of other people. 2.) The people of ...
*February 9, 2015*

**Math Probability Outcome **

A drawer contains 8 white socks and 5 black socks if two socks are chosen and you get 2 pair of white socks what is the probability outcome???
*February 9, 2015*

**Math Probability Outcome **

A drawer contains 8 white socks and 5 black socks if two socks are chosen and you get 2 pair of white socks what is the probability outcome???
*February 9, 2015*

**math **

Find two numbers (exactly) whose product is 10 and whose sum is 18.
*February 9, 2015*

**Calculus**

For midpoint rectangles my notes say something about expanding the interval but I'm not sure how that works.. And if it's minutes and hours would I have to do something to change it?
*February 8, 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 8, 2015*

**Physics Dynamics**

A 4-kg block is connected by means of a massless rope to a 2-kg block. What is the magnitude of the acceleration if the coefficient of kinetic friction between the 4-kg block and the surface is 0.20? Note : The 4kg block is on the table, the pulley is on the edge and the 2kg ...
*February 8, 2015*

**Physics Dynamics**

A 5.0-kg box is pulled horizontally with a 45-N force that makes angle of 40 degree with the horizontal. The coefficient of kinetic friction of the surface is 0.20. What is the magnitude of the acceleration of the box?
*February 8, 2015*

**Physics Dynamics**

A 10-kg block is pushed against a vertical wall by a horizontal force of 100 N. What is the coefficient of static friction between the block and the wall if the block is about to slide down?
*February 8, 2015*

**statistics**

a researcher weighs each individual in a sample of 25 laboratory rats and calculates the average weight for the group. the average weight is an example of a ____ .
*February 8, 2015*

**physics**

an arrangement of four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 81.2 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 62.7 N, T2 = 33.6 N, and T3 = 8.5 N. What are ...
*February 8, 2015*

**Math 1105**

if two identical squares have a total area of 18x^2+36x+18, find the length of one side of one of the squares
*February 8, 2015*

**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*

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