Wednesday
October 22, 2014

Posts by courtney


Total # Posts: 666

Physics
How would you set this up? A 250-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?
October 21, 2014

Chemistry
2NaN(3) > 2 Na +3N(2) What mass of sodium azide must be reacted to inflate and air bag to 70.0 L at STP?
October 19, 2014

Physics
A 55-kg soccer player jumps vertically upwards and heads the 0.45-kg ball as it is descending vertically with a speed of 29 m/s. If the ball is in contact with the player's head for 16 ms, what is the average acceleration of the ball? (Note that the force of gravity may be...
October 3, 2014

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

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