Thursday

October 2, 2014

October 2, 2014

Total # Posts: 662

**Physics**

A 2.87 kg object initially moving in the positive x-direction with a velocity of +4.87 m/s collides with and sticks to a 1.96 kg object initially moving in the negative y-direction with a velocity of -2.55 m/s. Find the final components of velocity of the composite object. (...
*October 2, 2014*

**Psycology**

Sara is 30 years old and came from a two-parent, low-income household in an urban environment. She has reached a turning point at which she has begun to appreciate her current bidirectional life stage in conjunction with heredity and the circumstances of her environment. Sara ...
*August 25, 2014*

**Statistics**

Six homes are randomly surveyed from a group of fifteen homes. How many different random samples are possible
*August 14, 2014*

**math**

A building is 17 ft high, what is the lenght the ladder must be to extend 3 ft higher than wall
*July 13, 2014*

**HCA 311 Health Care Financing & Information System**

Ms. Sue, No, I did not know that. How do I show you my text?
*June 15, 2014*

**HCA 311 Health Care Financing & Information System**

Using the example of “From the Front Lines” in Chapter 6 of your text, calculate the break even for the number of procedures. Use an electronic spreadsheet to show how you computed the break even and embed the spreadsheet in your paper. Discuss the impact of the ...
*June 15, 2014*

**Biomechanics**

Take a metal coat hanger and straighten it. Hold a 10 inch straight section so it points up in the air. Holding the bottom still and using the other hand to bend it to the side, move the end 1 inch then release it. What happens? Repeat this with 2 inches, 3 inches, etc, until ...
*June 14, 2014*

**Math**

You have 2 hundred feet of fencing to use for building a rectangular dog pen. find the dimensions of the pan having the greatest possible area
*June 4, 2014*

**Math**

what are all of the possible rational roots for x to the third power- x squared-x +8=0?
*June 3, 2014*

**Mathematics, simplify**

5ac+10ab-25ad
*May 5, 2014*

**math**

No it can not
*April 29, 2014*

**chemistry**

1.00 of an aqueous solution contains 1.52g of a compound used in antifreeze. If the osmotic pressure of this solution at 20.0 degree C is 448 torr, calculate the molar mass of the antifreeze compound
*April 28, 2014*

**chemistry**

what is the boiling point of 0.212 m lactose in water?
*April 28, 2014*

**chemistry**

calculate the vapor pressure of a solution 0.53 mol of cholestrol in 4.1 molof toluene at 32 degree C. pure toluene has a vapor pressure of 41 torr at 32 degree C
*April 28, 2014*

**MATH**

A movie theater ticket booth opens at 10 am. There are four tellers who divide the customers evenly. The tellers have served 16 customers so far this morning. which expression represents the unknown number of customers each teller will serve? Let c represent the additional ...
*April 22, 2014*

**Bio 20**

When blood enters a vein from a venule, the blood pressure A) remains constant because of the heart's pumping action B) increases because of the size of the vein C) increases because of stretch receptor stimulation D) decreases because of the size of the vein Please help!!!!!
*February 21, 2014*

**Math**

what angle in radians corresponds to 3 rotations around the unit circle
*February 18, 2014*

**Math**

Is there a formula used to find the surface area of a prism? For ex. A triangular prism
*February 18, 2014*

**precal**

A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 36 degrees from level ground to the kite string. If she used a full 140-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and the height of the ...
*February 14, 2014*

**Pre-Cal **

A Ferris wheel is 40 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes one full revolution every 7 minutes. You make two complete ...
*February 14, 2014*

**physics**

a 95-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is: (A) accelerating upward with an acceleration of 1.8 m/s^2 (answer 1.1 * 10^3 N) (B) moving upward at a constant speed (answer 931 N) (C) accelerating downward with an ...
*January 31, 2014*

**physics **

a 15-g bullet is fired from a rifle. it takes 2.50 * 10^-3s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 715 m/s. assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet. (answer ...
*January 31, 2014*

**physics **

a boat has a mass of 6800 kg. its engine generate a drive force of 4100 N, due west, while the wind exerts a force of 8000 N, due east, and the water exerts a resistive force of 1200 N due east. what is the magnitude and direction of the boats accelerations? (answer 0.309 m/s^...
*January 31, 2014*

**science**

1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
*January 15, 2014*

**science**

What mass of AgN03 would you dissolve in water to get 1g of silver?
*January 13, 2014*

**Chemistry**

thanks!
*January 13, 2014*

**Chemistry**

What mass of AgN03 would you dissolve in water to get 1g of silver?
*January 13, 2014*

**math**

20x100=2000 2000/80=25 So the answer would be 25
*January 9, 2014*

**Pre Calc**

How many pounds of dog food worth $.80 per pound must be mixed with dog food worth $.65 per pound to make a mixture of 60 pounds worth $.70 per pound?
*January 9, 2014*

**Pre Calc**

Thank you!
*January 9, 2014*

**Pre Calc**

the units digit of a 2 digit number is 4 less than the tens digit. the number it names is 3 less than 9 times the sum of the digits what is the number?
*January 9, 2014*

**Physics **

A 2 kg object is moving 6 m/s. It compresses a spring 1 meter that has a spring constant of 8 N/m
*November 18, 2013*

**chemistry**

2 questions, I'm Having trouble figuring out how to calculate the moles of a solute in a solution based on the molarity and the volume. Here is what I'm working with. 1) "Use molarity of the stock solution of aspirin/Fe(No3)3(aq) (0.0044mol) and the total volume ...
*November 6, 2013*

**chemistry**

What is the formula for predicting the grams of Aspirin produced from reacting Salicylic Acid and Acetic Anhydride?
*November 5, 2013*

**chemistry**

Thank you, I was stumped!
*November 5, 2013*

**chemistry**

What is the formula for predicting the grams of Aspirin produced from reacting Salicylic Acid and Acetic Anhydride?
*November 5, 2013*

**Math**

I am part of a whole. I am less than one-half but greater than four tenths. I am a decimal with the digit 2 in my hundredths place. What number am I?
*October 16, 2013*

**Chemistry**

A solution contains an unknown amount of dissolved magnesium. Addition of 3.38×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in this solution?
*October 3, 2013*

**math**

The equation 2wcubed. Do you cube w first then multiply by 2 or do you multiply w times 2 first and then cube the sum?
*September 10, 2013*

**Physics 210**

A football kicker is trying to make a field goal from 42.0m. If he kicks at 35∘ above the horizontal, what minimum speed is needed to clear the 3.10m high crossbar?
*September 10, 2013*

**literature**

what is scope malala
*September 9, 2013*

**Math 7th grade**

Thanks! Great help! :)
*September 4, 2013*

**Math 7th grade**

Write a mixed number for each time period. Be sure each fraction is in lowest terms. 8:00am to 9:20 am Not sure how to set up
*September 4, 2013*

**Math**

If the number of male students and female students in each of 3 classes is equal, and the average number of males in each class is 30, What is the total number of students in all 3 classes? *My answer is 180, but I'm not sure.
*August 13, 2013*

**Math**

You are driving at 35.8 m/s when you see a roadblock 100 meters ahead. If you break at a safe deceleration rate of about -4.5m/s^2, how fast will you be going when you reach the roadblock?
*June 3, 2013*

**Algebra 2**

How do you simplify?: -4x/x-x^2
*May 27, 2013*

**Eng B**

A is wrong
*May 1, 2013*

**math 5th**

Estimate teh area of the circle and use 22/7 for pie. Teh circle shows line all teh way accross measruing 28cm. Find area. Can some one explain how
*April 24, 2013*

**chemistry**

how many liters are occupied by 0.908 mol of nitrogen at 108 degrees C and 0.858 atm pressure?
*April 23, 2013*

**geometry**

For a cone, if the radius was quadrupled and the slant height was reduced to one sixth of its original size, what would be the formula to find the modified surface area?
*April 15, 2013*

**Statistics**

1 should be ¼ so it should be drawn 25 times 2 should be ½ so it should be drawn 50 times 5 should be ¼ so it should be drawn 25 times Avg=10/4=2.5 S2=(2.25+.25+.25+6.25)/4=9/4=.25 so S=1.5 ES=100(2.5)=250 SE=√100 (1.5)=15 A. number of 2's B. Sum...
*March 28, 2013*

**pre calculus**

find the average rate of change of f(x)=x^3-5x+3: a. from -6 to -3 b. from -1 to 2 c. from 2 to 8 I am so lost, can someone please show me how to do this?
*March 27, 2013*

**math**

use the rational zero theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers: f(x)=4x^4+9x^3+30x^2+63x+14 I cant even find sample problems to help me figure this out. help me please?
*March 27, 2013*

**Trig **

How do I use the unit circle to evaluate tan(-3pi/4)
*March 25, 2013*

**math**

A large cylinder has a volume of about 5,400 cubic cm. A small cylinder is similar in shape to the larger cylinder with a scae factor of 2/3.Which measurement is closest to the volume of a cylinder. f)1600cubic cm g)2400 cubic cm h)2700 cubic cm j)3600 cubic cm The answer is ...
*March 19, 2013*

**Chem**

if 15 g of nitrogen reacts with 15 g of hydrogen, 10.5 g of ammonia is produced. what is the percent yeild of this reaction?
*March 7, 2013*

**Algebra**

Oh! So it'll be: 5*7=35 35+50=85 Will save 85 dollars after the seventh month. Thanks.
*March 3, 2013*

**Algebra**

355
*March 3, 2013*

**Algebra**

After one month at a new job you decide to save $50. Each month you plan to increase your savings by five dollars. a.)Write an explicit formula to model the amount you will save each month. b.)How much will you save in the seventh month?
*March 3, 2013*

**english 3**

In the 1920s, there was a boom in? consumerism. religion. world travel I believe it is world travel???
*March 1, 2013*

**Algebra 2**

4.)A diamond is purchased for $3500. Its value increases 5% each year. Find the value of the diamond after six years.
*February 25, 2013*

**Physics**

A 2.1 kg mass is connected to a spring with spring constant k= 180 N/m and unstretched length 16 cm. The pair are mounted on a frictionless air table, with the free end of the spring attached to a frictionless pivot. The mass is set into circular motion at 1.3 m/s. Find the ...
*February 21, 2013*

**Trig **

A pendulum swings through an angle of 22 degrees each second. If the pendulum is 30 inches long, how far does its tip move each second?
*February 20, 2013*

**Algebra**

how do I solve (16)^3 +48(16)^2
*February 13, 2013*

**math**

I am a 2-digit number over 50. When you put me in groups of 7, two are left over. The sum of my digits is 11. What number am I?
*February 5, 2013*

**math**

complete the table for the equation y=x+6
*January 24, 2013*

**math-algebra 1**

At 8am, Minnie Mouse leaves home driving 35 mph. A half hour later Mickey Mouse drives 50 mph to catch up to her. If Mickey Mouse is delayed 15 minutes with a flat tire, at what time will he catch up to Minnie Mouse
*January 15, 2013*

**7th Grade Literature**

scope malala
*December 11, 2012*

**physics**

A coil spring is extended by 4.4 cm when it supports a 1.00- N weight. If an identical spring is joined to the end of the first one, what is the extension of the combined spring when it supports the same 1.00- N weight? Assume the spring masses to be negligible
*December 4, 2012*

**Physics**

A physics student wants to build a spring gun that when aimed horizontally will give a 35.0- g ball an initial acceleration of 'g' by releasing a spring that has been compressed 18.0 cm. What is the velocity of the ball as it emerges from the gun?
*December 4, 2012*

**Chemistry**

A set of bookshelves rests on a hard floor surface on four legs, each having a cross-sectional dimension of 2.7 5.2 cm in contact with the floor. The total mass of the shelves plus the books stacked on them is 246 kg. Calculate the pressure in pascals exerted by the shelf ...
*December 1, 2012*

**physics**

A train travels at a constant speed around a curve of radius 225 m. A ceiling lamp at the end of a light cord swings out to an angle of 20.0º throughout the turn. Draw a free body diagram? What is the speed of the train?
*November 20, 2012*

**Pre-calc**

Evaluate the trigonometric functions by memory or by contruscting appropriate triangles for the given special angles. (a) csc 30deg (b) sin pi/4
*November 20, 2012*

**Physics **

A 21.1 g ball of clay is thrown horizontally at + 38.7 m/s toward a 1.2 kg block sitting at rest on a frictionless surface. The clay hits and sticks to the block. A. What is the speed of the block and clay right after the collision? m/s B. Use the block's initial and final...
*November 7, 2012*

**English**

What grammatical structure is the italicized portion of the sentence? 1. (Headed by a senior), the group drew up rules for School Spirit Week. - nominative absolute 2. My most valuable coin, (one from Spain), is worth more than $100.00. - prepositional phrase with a gerund 3. ...
*November 4, 2012*

**English**

It is impossible to have an indirect object without a subject, transitive verb, and a(n) _____. noun preposition direct object intransitive verb
*November 4, 2012*

**physics**

An archer shoots an arrow horizontally at a target 13m away. The arrow is aimed directly at the center of the target, but it hits 57cm lower. What is the initial velocity?
*October 23, 2012*

**Physics**

An inventive child named Chris wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley, Chris pulls on the loose end of the rope with such a force that the spring scale reads 265 N. Chris’s...
*October 22, 2012*

**Chemistry**

If there were 197g of sulfuric acid in your car battery, how many grams of baking soda would you need to completely neutralize the acid. Here is the balanced equation: H2SO4(aq) + NaHCO3(s)....NaSO4(aq) + 2CO2(g) + 2H20(l)
*October 21, 2012*

**College Chemistry**

How do I type I2 meaning Iodine
*September 28, 2012*

**math**

lim delta x to 0 of sin[(pi/6)+delta x]-(1/2) all divided by delta x hope i made that clear. hint given: sin(theta+gamma)=sin theta cos gamma+cos theta sin gamma sorry not sure where to start on this one
*September 13, 2012*

**Algebra**

How do you multiply (6m^4)(8m^2)
*September 12, 2012*

**Organic Chemistry**

Hello I have to determine the theoritical yield of sulfanilamide after crystalization of impure sulfanilamide with 95% ethyl alcohol (the impure sulfanilamide contains 5% Fluorenone) I understand how to calculate the theoretical yield, my problem is determining the chemical ...
*September 11, 2012*

**physics**

1.15
*September 9, 2012*

**Stats**

A two-tailed test is conducted at the 5% significance level. What is the right tail percentile required to reject the null hypothesis?
*September 9, 2012*

**Hypothesis Statistics**

A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null hypothesis?
*September 9, 2012*

**Hypothesis Statistics**

At one school, the average amount of time that tenth-graders spend watching television each week is 18.4 hours. The principal introduces a campaign to encourage the students to watch less television. One year later, the principal wants to perform a hypothesis test to determine...
*September 9, 2012*

**chemistry**

A typical adult body contains 55 water. If a person has a mass of 61 , how many pounds of water does she have in her body?
*September 6, 2012*

**math **

is surface area squared? if I got 201 meters for the surface area would it be: 201 meters or 201 meters ^2
*September 3, 2012*

**math**

(2 revolutions/second)(60 seconds/minute) would this just be: 2 rev. per second • 60 seconds= x rev. per minute 120 revolutions per 60 seconds 120 revolutions per minute answer= 120 revolutions per minute
*September 3, 2012*

**Algebra 2**

if the angle of elevation of the sun with the ground is 10 degrees, what is the length of a shadow cast by a six foot person to the nearest foot?
*August 21, 2012*

**social studies**

With the vital assistance of _______, Theodore Roosevelt established the first comprehensive national conservation policy
*August 10, 2012*

**BUS303**

How has technology fostered new cost effective virtual methods of training
*July 22, 2012*

**Sociology**

Write a 1,000-1850 -word response in which you consider specific types of communication, common miscommunications among genders, and effective communication strategies. Address the following questions: o What type of verbal and nonverbal communication do men and women use? Is ...
*July 16, 2012*

**Physics**

A bicyclist starts from rest and accelerates at a constant rate for 15.0s. After 10.0s the bicycles front wheel is turning at a rate of 2.5 rev/s. The tire wheel has a diameter of 0.8m. A)Through how many revolutions does the wheel turn in the first 10.0s? B)What is the linear...
*June 18, 2012*

**Math**

Victoria has a boat that can move at a speed of 20km/h in still water. She rides 140km downstream in the same time it takes 35km upstream. What is the speed of the river?
*May 17, 2012*

**math**

what is the surface area of a cylinder radius 10 hieght 2
*May 8, 2012*

**English Parallelism**

Okay thank you sooo much for your time and patience you really helped me alot !
*April 29, 2012*

**English Parallelism**

So for 6 we dibt use not only but also ?
*April 29, 2012*

**English Parallelism**

Okay i dont quite get it but ill try 6. The student was not only scrupulous, but also received an award for honesty at the end of the year. 7. I dont really understand this one By the way thank you so much for helping me youve been a huge help
*April 29, 2012*

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