Saturday

August 30, 2014

August 30, 2014

Total # Posts: 1,113

**math**

There are 3 reds, 4 blues, 6 whites and 5 yellows in a bag. What is the probability that the first two you draw are both red if you do not replace the first one?
*April 6, 2013*

**Physics**

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.28 mm (2.80 10-4 m). A screen is located 2.7 m from the double slit. At what distance from the center of the screen will the first bright fringe beyond the center fringe appear...
*April 5, 2013*

**Physics**

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.44 mm (4.40 10-4 m). A screen is located 2.1 m from the double slit. At what distance from the center of the screen will the second dark fringe beyond the center fringe appear? ...
*April 5, 2013*

**health**

BMI is used to screen for______?
*April 1, 2013*

**weight**

researchers found that a ____ is more important and is the key to losing weight rather than a popular one.
*April 1, 2013*

**health**

for adults which ranges reflect an accurate BMI category
*April 1, 2013*

**weight**

why is having abdominal fat a serious concern
*April 1, 2013*

**health**

in order to loose weight you have to ___
*April 1, 2013*

**health**

national weight control registry
*April 1, 2013*

**health**

Why are fad diets considered unhealthy?
*April 1, 2013*

**weight**

Obesity can cause a person to develop what type of conditions?
*April 1, 2013*

**weight**

If you decided to lose weight then ____ help?
*April 1, 2013*

**Bio Help Please!!!**

1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?
*March 31, 2013*

**Bio Help Please **

1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?
*March 30, 2013*

**math**

y=-2x-1 how to set up to find what x is, this needs to graph as a linea equation.
*March 20, 2013*

**Physics**

A test charge of +3.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?
*March 18, 2013*

**physics**

Two identical thin wires are oriented along the x and y axes. With current on x plane going North. Current on y plane going West.Both carry the same current I, and there is no electrical contact between the wires. The points A, B, C, D are each equidistant from both wires. A: ...
*March 16, 2013*

**Math **

Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)
*March 14, 2013*

**Math**

Steve, That still isn't the correct answer :(
*March 14, 2013*

**Math **

Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)
*March 14, 2013*

**Microbiology**

if the original concentration of phage was markedly increased from the concentration that you received, how could you ensure that you had between 30-300 plaques on your plate? (instead of TNTC)
*March 11, 2013*

**Statistic HELPPPPPP**

A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.868-0.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient. 2)What would the gas mileage be for a car with a...
*March 11, 2013*

**math**

A Model M3SWE mandolin has a list price of $1299.90, with a chain discount of 5/3/2. (A) What would be the trade discount amount? (B) What would be the net price?
*March 4, 2013*

**Math**

Amy Powell invested $8500 twice a year in an ordinary annuity at New York Securities for a period of 5 years at an annual interest rate of 10% compounded semiannually. Using the ordinary annuity table , calculate the total value of the annuity at the end of the 5-year period
*February 27, 2013*

**Diff eq**

y'(x)=sqrt2y(x)+7, y(4)=1 Solve the seperable diff eq
*February 24, 2013*

**Stat Help Please**

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.
*February 23, 2013*

**Stat Help Please**

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.
*February 23, 2013*

**history**

Who came to power in China, instituting a Communist regime that would bring great suffering to the nation's people
*February 22, 2013*

**Global History**

How were the Mongols able to conquer so much territory so rapidly?
*February 20, 2013*

**statistics**

A television program director has 14 shows available for Monday night and 5 shows must be chosen. How many different possible combinations are there?
*February 15, 2013*

**math**

a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make
*February 10, 2013*

**Math**

The Midtown Middle School cheerleaders earned $175 at a car wash. If this amount is 25% of the cost of a new set of uniforms, what is the total cost fora a set of uniforms? Explain your reasoning.
*February 7, 2013*

**general chemistry**

so to get volume, you do v=(1.33)*3.14*99e-7^3????
*February 6, 2013*

**general chemistry**

the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density
*February 6, 2013*

**chemistry**

inorganic chemistry
*February 5, 2013*

**chemistry**

I am supposed to add NH4 and C2H3O2 together and write the new ion. Would it be NH7C2O2? do I add the hydrogens together and were would it go in the order then?
*February 5, 2013*

**Sociology HELPPPP**

How does deviance and crime function both for and against society? Be sure to include social control in your answer group.
*February 1, 2013*

**Vector Calculus**

An airplane is traveling in the direction 20degrees west of north at 700 km/hr. Find the component form of velocity of the airplane assuming that the positive x-axis represents due east and the positive y-axis represents due north.
*January 26, 2013*

**american government**

judicial review is the power of the american courts to:
*January 21, 2013*

**algebra**

Determine which of the flowing points lie on the line given by the equation 3x+6y=12
*December 16, 2012*

**Physics**

A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 23 degree angle, what is the angle of refraction? Assume that the cold air temperature is -10 degrees C and the warm air temperature is +...
*December 13, 2012*

**physics**

A particular guitar string is supposed to vibrate at 210Hz , but it is measured to vibrate at 220Hz By what percent should the tension in the string be changed to correct the frequency?
*December 13, 2012*

**Physics**

Assuming the fluid has a density of 1.00 (g/cm^) at what height h should the bottle be placed so the liquid pressure is 38mm-Hg ? B.At what height h should the bottle be placed so the liquid pressure is 460mm-H_2O ? C.If the blood pressure is 18 {mm-Hg} above atmospheric ...
*December 11, 2012*

**Physics**

Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 40m above that pipe. Pa?
*December 11, 2012*

**Physics**

A 7.9cm diameter horizontal pipe gradually narrows to 5.9cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.0kPa and 21.0kPa , respectively. What is the volume rate of flow? in m3/s please help!
*December 11, 2012*

**Biology**

The half-life of Carbon-14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon-14 of living organisms? Explain your calculation.
*December 9, 2012*

**Physics**

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!
*December 6, 2012*

**physics**

A 160kg horizontal beam is supported at each end. A 330kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?
*November 27, 2012*

**Physics**

SOrry! the units are 11500rmp 1.52 m*N 6.07kg 0.0750m
*November 27, 2012*

**Physics**

A centrifuge rotor rotating at 11500 is shut off and is eventually brought uniformly to rest by a frictional torque of 1.52 . a.If the mass of the rotor is 6.07 and it can be approximated as a solid cylinder of radius 0.0750 , through how many revolutions will the rotor turn ...
*November 27, 2012*

**Algerbra**

Combine and show all work please 3/2y+2/y-1-2/y
*November 24, 2012*

**Algerbra**

simplify a-1/a ___________ 2+3/2+1/a^2
*November 24, 2012*

**math**

Use the tangent line approximation to approximate the value of ln(1.004)
*November 19, 2012*

**Chemistry**

thanks! But it turns out I was over thinking it!
*November 19, 2012*

**Chemistry **

In this lab experiment you will make 100.0 mL of a 0.100 M solution of Co(NO3)2. However you must calculate the number of moles of compound that will be needed (moles= Molarity x Liters).Then calculate the mass of Co(NO3)2 that will need to be weighed out (mass= moles x molar ...
*November 19, 2012*

**math**

a small business loan in the amount of 50,000 with an interest rate of 9% that compounds monthly for 7 years what would my monthly payment be
*November 12, 2012*

**math**

State a trigonometric ratio that is equivalent to each of the following trigonometric ratios Sin 3pie/10 Cos 6pie/7
*November 10, 2012*

**Physics**

A hydraulic lift is used to jack a 780 kg car 15 cm off the floor. The diameter of the output piston is 15 cm, and the input force is 160 N. a)What is the area of the input piston (in m^2)? b)What is the work done in lifting the car 15 cm? c)If the input piston moves 13 cm in ...
*November 10, 2012*

**Physics **

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 1.6000kg when weighed in air.
*November 10, 2012*

**physics**

A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the direction of the displacement
*November 8, 2012*

**physics**

A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the magnitude of the displacement?
*November 8, 2012*

**accounting**

Analyze and record, in the form of T Accounts, Mr. James' transactions: Jan 1: Amount invested in the business $10,000 Jan 7: Bought equipment for $500 Jan 9: Bought office furniture with $2,000 cash Jan 10: Bought materials with $2,000 cash Jan 17: Sold part of equipment...
*November 6, 2012*

**Chemistry**

convert 458166 atoms of H20 to moles
*November 6, 2012*

**pre algebra**

A woman who is 5feet 4 inches cast a shadow that is 6 feet tall. How long of a shadow would be cast by a man who is 6 feet 8 inches tall
*November 5, 2012*

**Algerbra**

George pays a flat amount for the first 200 minutes plus so much for each additional minute on his cellular phone each month. Last month it cost him $33.78 for 244 minutes of use. The previous month it cost $38.94 for 287 minutes of use. What are the flat rate and per minute ...
*November 2, 2012*

**Math**

Jared can paddle his canoe 1 mile upstream in 1 hour, but it takes only a half hour to paddle back the same distance. Find the speed of water. (Hint: d=rt and the rate or canoe speed, depending on which way he is going.)
*November 2, 2012*

**Calc**

Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??
*October 22, 2012*

**English**

About what?
*October 22, 2012*

**Math**

Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??
*October 22, 2012*

**Math**

Show how to make one addend a ten. Complete the new addition sentence. 38 + 25=? ---- + ---- =
*October 15, 2012*

**algebra**

2st squared -s squared. S=4 t=8
*October 15, 2012*

**geometry**

If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.
*October 14, 2012*

**o Chem**

a sample consisting of 1-bromopropane and 1-chloropropane isinjected into a gas chromatograph quipped with a nonpolar column.which compound has the shorter retention time? Explaine the answer. b.if the same sample were run several days later with theconditions as nearly the ...
*October 9, 2012*

**math**

The function f(x) = ax^3-x^2+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b, and then determine the other factor
*October 7, 2012*

**math**

An open topped box can be created by cutting congruent squares from each of the 4 corners of a piece of cardboard that has dimensions of 20cm by 30cm and folding up the sides. Determine the dimensions of the squares that must be cut to create a box with a volume of 1008cm^3
*October 7, 2012*

**math**

An open box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of 1040 cm ^3
*October 6, 2012*

**world geography**

economics status, social status.
*October 4, 2012*

**world geography**

What processes cause changes in settlement patterns?
*October 4, 2012*

**world Geography**

Culture, age, money.
*October 4, 2012*

**world Geography**

What social factors determine population trends and demographics of a region?
*October 4, 2012*

**World Geography**

What human and physical features influence the size and distribution of settlements?
*October 4, 2012*

**World Geography**

Work, distance, stores
*October 4, 2012*

**World Geography**

What economic factors determine population trends and demographics of a region?
*October 4, 2012*

**World Geography**

The economy if its bad..not able to survive there, social status.
*October 4, 2012*

**World Geography**

What processes cause changes in settlement patterns?
*October 4, 2012*

**World Geography**

Push factors are those that encourage a migrant to leave his place of residence. Includes cost of living, personal safety, environmental catastrophes or more minor issues suc as weather and climate. Pull factors are those that attract a migrant to a country, such as the ...
*October 4, 2012*

**World Geography**

How do push and full factors and physical geography affect immigration?
*October 4, 2012*

**math**

The volume of a rectangular box is (x^3+6x^2+11x+6) cm^3. The box is (x+3) cm long and (x+2) cm wide . How high is the box
*October 2, 2012*

**math**

Consider the function f(x)=x^3+4x^2+kx-4. The remainder from f(x)/(x+2) is twice the remainder from f(x) / (x-2). Determine the value of k
*October 2, 2012*

**math**

The function f(x)=ax^3-x^3+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b , and then determine the other factor
*October 2, 2012*

**math**

Factor each expression (X+5)^3-(2x+1)^3
*October 1, 2012*

**math**

Factor each expression (X+5)^3-(2x+1)^3
*October 1, 2012*

**World History**

In the question "Why the haitian revolution probably truer to itself than it's French or American counterparts?" Is it referring to how the Haitian revolution stayed truer to their cause in revolution because they gave everyone equal rights, while american and ...
*October 1, 2012*

**math**

Each dividend was divided by another polynomial, resulting in the given quotient and remainder. Find the divisor Divided:5x^3+x^2+3 ,quotient:5x^2-14x+42, remainder:-123
*September 28, 2012*

**health**

why is having excessive abdominal fat a serious concern
*September 20, 2012*

**O Chem**

Comment on the suitability of running a infared spectrum under these conditions A KBr pellet is prepared with a compound that melts at 200 C same question but at 30 C
*September 18, 2012*

**O chem**

comment on suitability of running infared spectrum under the following conditions: A neat spectrum of liquid with a boiling point of 150 C is determined with salt plates. and same question but at 35 C
*September 18, 2012*

**math**

the final grade for a particular course is calculated by dividing total points earned by total points available. There are 6 quizzes worth 15 points each, and 2 exams worth 50 points each. If a student earns 67 points total on the quizzes and wants to get at least 86% in the ...
*September 8, 2012*

**math**

Evaluate f(x) = x^2+3-4 For f(1/4)
*September 4, 2012*

**math**

156 / 55 - how do i show my work for long division?
*August 30, 2012*

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