Monday

May 4, 2015

May 4, 2015

Total # Posts: 81,004

**physics**

two identically charged sphere of mass 3 gm each are suspended from a point by threads of length 13 cm. they are separated 10 cm due to repulsion. find the tension of the thread and charge on the sphere?
*April 15, 2015*

**statistics**

A tennis player makes a successful first serve 51% of the time. if she serves 9 times, what is the probability that she gets exactly 3 first serves in? assume that each serve is independent of the others.
*April 15, 2015*

**Physics **

We think of the width of the central maxima on our screen as a measure of the uncertainty in the direction of travel of the protons. What happens to this uncertainty in the direction of travel (momentum) as the slit width narrows?
*April 15, 2015*

**Physics **

When we force protons through a narrow slit, we are gaining certainty in their position. As we gain certainty in their position, what should happen to the certainty on momentum?
*April 15, 2015*

**chemistry**

A chemist dissolves 0.097 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 13.6-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in the second ...
*April 14, 2015*

**workplace set-up**

setting up medical office with 3 physicians, 6 adm. personnel and 4 clinical assistants plus 1 office manager. How can I set up a complete computer equipments with all equipment needed to run the office
*April 14, 2015*

**calculus**

3:For an object whose velocity in ft/sec is given by v(t) = −2t^2 + 4, what is its distance travelled, in feet, on the interval t = 0 to t = 2 secs? a:4.876 b:2.667 c:9.752 d:2.438
*April 14, 2015*

**calculus multiple choice**

1.The region in the first quadrant bounded by the x-axis, the line x = ln(π), and the curve y = sin(e^x) is rotated about the x-axis. What is the volume of the generated solid? a: 0.906 b:0.795 c:2.846 d: 2.498 2.Find the average value of f(x)=2/x over the interval [1, 3...
*April 14, 2015*

**math**

20 percent of what number is 18
*April 14, 2015*

**grammar**

check
*April 14, 2015*

**math**

If we say that rare events are those events that happen with a probability of less than .05, then how many observations of men taller than 71 inches tall would you have to observe when randomly sampling before concluding that you had a rare sample? mean = 69, SD = 4
*April 14, 2015*

**math**

Given these probabilities: pr(rain) = .2 pr(snow)=.1 pr(cloudy)=.5 and pr(sun)=.2 pr(crash|rain or snow) = .2 pr(crash|cloudy or sun) = .05 what is the probability of a car crash?
*April 14, 2015*

**chemistry**

What is the final volume if 125 mL of a stock solution of nitric acid at 10.30 M is diluted to 0.500 M?
*April 14, 2015*

**calc**

Find the maximum possible area of a rectangle in quadrant 1 under the curve y=(x-4)^2 (with one corner at the origin and one corner on the curve y=(x-4)^2)
*April 14, 2015*

**calc**

The base of a triangle is shrinking at a rate or 2 cm/s while the height is growing at a rate of 3 cm/s. How quickly is the area of the triangle changing when the base is 10 cm and the height is 6 cm?
*April 14, 2015*

**calc rates**

the radius, r, of a circle is growing at a rate of 3 cm/s. Find the rate of change of the area of the circle when the radius is 5 cm
*April 14, 2015*

**SCIENTIFIC NOTATION**

THANK YOU REINY !!
*April 14, 2015*

**SCIENTIFIC NOTATION**

which expression is not equal to 6^3/6^6? A 1/6^2 B 6^-3 C 1/216 D 1/6^3
*April 14, 2015*

**MATH WORD PROBLEM HELP PLEASE**

A water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320pi cubic feet. What is the diameter, in feet, of the water tank?
*April 14, 2015*

**SCIENTIFIC NOTATION**

A lab has two bacteria cultures. Culture A contains 8*10^4 bacteria and culture B contains 4*10^6 bacteria. How do the two cultures compare in size? A. Culture A contains twice as many bacteria as Culture B B. Culture A contains 1/2 as many bacteria as Culture B C. Culture A ...
*April 14, 2015*

**math**

find the first 3 term s of an arithmetic sequence in which the 21 term is -54 and the fifteenth term is -170
*April 14, 2015*

**Reading**

I was right!! it was C. thanks a whole bunch for ur help:):):):)
*April 14, 2015*

**Reading**

i think it is C, u don't have to tell me yes or no. I'm just saying! I checked the definition :)
*April 14, 2015*

**Reading**

Ok thanks! At least I can eliminate A & D.
*April 14, 2015*

**Reading**

Is it A?
*April 14, 2015*

**Reading**

This is the last question! OK here it goes. In which sentence about A Christmas Carol is the word conveyed used correctly? Marley first conveyed through Scrooge's doorknocker The Thin and Portly men conveyed donation's in Scrooge's office Marely conveyed the ...
*April 14, 2015*

**Reading**

Yay thx!
*April 14, 2015*

**Reading**

1.Which word is most similar to morose? sensitive silly unhappy*** stubborn 2. In which of these lines is the meaning of the word gratitude best expressed? Why its old Fezziwng! Bless his heart; its Fezziwing alive again! The happiness he gave it quite as great as if it cost ...
*April 14, 2015*

**Reading**

OK thanks a lot! I will make sure I work on them!!!!
*April 14, 2015*

**Reading**

1.C 2.D 3.D Thanks for the site. I will work on them + they are a lot so it will take me time. Thanks! (I hope these are right!)
*April 14, 2015*

**Reading**

1.What is the prepositional phrase in this sentence? The children sat under the tree. sat*** children under the 2.What is the object of the preposition in the sentence? Scrooge will walk alone from his offices. alone Scrooge walk*** offices 3.What is the prepositional phrase ...
*April 14, 2015*

**Chemistry**

The density of whole blood is 1.05g/mL. A typical adult has about 5.5L of whole blood. What is the mass in pounds of this amount of whole blood?
*April 14, 2015*

**math**

Which number is not equal to one of the following expressions? 0.6038 x 1000 603.8 -: 10 60.38 -: 100 0.6038 603.8 60.38 6.038
*April 14, 2015*

**physics**

How long would it take to bring a 318 kg car moving at 11.2 m/s to a complete stop if a 602.8 N breaking force is applied?
*April 14, 2015*

**Technical Physics**

A boat is sitting in the middle of the lake. What happens to the water level in the lake when a heavy anchor is thrown overboard? Does the water level rise, lower, or stay the same.
*April 14, 2015*

**Chemistry**

To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.7-L bulb, then filled it with the gas at 1.30atm and 30.0 ∘C and weighed it again. The difference in mass was 3.9g . Identify the gas.
*April 14, 2015*

**mathematics**

Factorise 4ab²+8ab-16a²b
*April 14, 2015*

**Mathematics**

Factorise 4m²-9m²
*April 14, 2015*

**Physics**

4 charges Q1=2C, Q2=3C, Q3=3C & Q4=-4C are placed at the vertices of a square of side 10cm. find the force on 5th charge Q5=1C placed at the center of square.
*April 14, 2015*

**math**

wattttttttt
*April 14, 2015*

**math**

why shud math be included in alll the streams
*April 14, 2015*

**math**

den wattt den hw did it cum
*April 14, 2015*

**math**

who found a subject called math
*April 14, 2015*

**PHYSICS1**

Calculate the range (using g=9.8m/s) and the height of the pumpkin using the initial speed ( 18m/s), half-time (1.7) and angle (75).
*April 14, 2015*

**PHYSICS**

Calculate the maximum height the tank shell reaches using the initial speed (18 m/s), half-time(1.8), and angle(75).
*April 13, 2015*

**5th grade math**

Applying concept :calculate As of July 2004, the population of the United States was 293,027,571.if more than half of these people live within 80 kilometers of an ocean, about how many people live within that distance? Show your work.
*April 13, 2015*

**phi103**

3rd one
*April 13, 2015*

**MATH**

WHAT IS GREEN AND MAKES HOLES?
*April 13, 2015*

**Scientific Notation**

The point on a pin has a diameter of about 1 * 10^-4 meters. If an atom has a diameter of 2 * 10^-9 meters, about how many atoms could fit across the diameter of the point of a pin?
*April 13, 2015*

**Algebra**

x=1.5
*April 13, 2015*

**Chemistry**

How many grams of solid zinc metal will completely react with 100.0 mL of 0.0525 M HCl, if zinc chloride and hydrogen gas are the only products?
*April 13, 2015*

**art**

Could it be A? Was it A?
*April 13, 2015*

**POL 201: American National Government**

An appellate court that hears an appeal on a money laundering case from a district court....(Points : 1) A) is not concerned with guilt or innocence. B) can only send the case back for retrial. C) is concerned with whether proper legal procedures were followed during the ...
*April 13, 2015*

**math**

u hav nt postd any link
*April 13, 2015*

**math**

do integers have + and - sign
*April 13, 2015*

**math**

do integers have = and - sign
*April 13, 2015*

**math **

what are integers
*April 13, 2015*

**Biology, Chemistry**

determine the volume in mL 95.0mL of a 2.05M KNO3 solution using a 4.00M KNO3 solution
*April 13, 2015*

**chemistry**

a chemist puts 50g of chemical a in beaker 1 and 25 g of chemical b in beaker 2 she places bot beaker into a larger container. as the chemicals evaporated the gas react into a white solid what mass of solid will form if chemicals react
*April 12, 2015*

**Physics**

A sprinter crosses the finish line of a race. The roar of the crowd in front approaches her at a speed of 357m/s . The roar from the crowd behind her approaches at 341m/s . A) What is the speed of the sound? B) What is the sprinter's speed?
*April 12, 2015*

**economics**

Dr. Leona Williams, a well-known plastic surgeon, has a reputation for being one of the best surgeons for reconstructuve nose surgery. Dr. williams enjoys a rather substantial degree of markt power in this market
*April 12, 2015*

**Pschology 202**

True or false? Creativity and practical intelligence are typically combined to create experts in a particular field.
*April 12, 2015*

**Finance**

Patricia and Joe Payne are divorced. The divorce settlement stipulated that Joe pay $520 a month for their daughter Suzanne until she turns 18 in 3 years. Interest is 18% a year. How much must Joe set aside today to meet the settlement?
*April 12, 2015*

**algebra plsssSSS**

let u^2=x^4, so you have now u^2-52u+576=0 (u-26)^2=0 u= 26 x^2=26 u= +- sqrt 26 check that
*April 12, 2015*

**ALGEBRA PLSSSSSS**

looks like a second degree, so we can test that. y=ax^2+bx + c now do the data points... 2=4a-2b + c (-2,2) -2=a-b+c (-1,-2) 5=a+b+c (1,5) now you have three equations, three unknwns solve by any method,then check the last data pont.
*April 12, 2015*

**calc rates**

Water is leaking out of an inverted conical tank at a rate of 10600.0 cm3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 14.0 m and the the diameter at the top is 6.0 m. If the water level is rising at a rate of 27.0 cm/...
*April 12, 2015*

**ART**

Is 3 C??
*April 12, 2015*

**calc rates**

Air is being pumped into a spherical balloon so that its volume increases at a rate of 50cm3/s. How fast is the surface area of the balloon increasing when its radius is 11cm? Recall that a ball of radius r has volume V=43πr3 and surface area S=4πr2.
*April 12, 2015*

**calc rates**

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C where C is a constant. Suppose that at a certain instant the volume is 690 cubic centimeters and the pressure is 97 kPa and is decreasing at a rate ...
*April 12, 2015*

**math**

Water is leaking out of an inverted conical tank at a rate of 10600.0 cm3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 14.0 m and the the diameter at the top is 6.0 m. If the water level is rising at a rate of 27.0 cm/...
*April 12, 2015*

**math**

Which is not a combination? A. Choosing 3 toppings for your Pizza. B. Lining 3 students up in a row. C. Choosing 2 toppings from a tray of 10. D. Choosing 5 students to represent a class of 30. Is the answer D? Thank you for your help.
*April 12, 2015*

**calculus rates**

The altitude (i.e., height) of a triangle is increasing at a rate of 2 cm/minute while the area of the triangle is increasing at a rate of 4 square cm/minute. At what rate is the base of the triangle changing when the altitude is 10.5 centimeters and the area is 97 square ...
*April 12, 2015*

**Math**

it's C you set it up like this (say you have 3 toppings for your pizza and 6 toppings to choose from) 6 6C3 = ---- 3 then.. = 6 times 5 --------- 3 times 2 when you multiply the numbers they go lower and lower until it reaches the number (aka the 3 toppings for your pizza...
*April 12, 2015*

**art last question!**

Kimonos often repeated images from nature. which of the followign artistic elements is this an example of? A. asymmetry B. balance C. color D. patterns I think its D
*April 12, 2015*

**arttt**

then is it D?
*April 12, 2015*

**arttt**

public spaces such as playgrounds or skate parks often serve the purpose of meeting which significant human needs? A. needs for conflict and stress B. needs for solitude and meditation*** C. needs for recreation and challenge D. needs for creativity and art creation Am I right?
*April 12, 2015*

**Art help please**

thanks!!!
*April 12, 2015*

**Art help please**

a cityscape artist completes a portrait of a busy, grimy, dirty, city with no signs of nature. which of the following might he be suggesting humanity's relationship with the surrounding world? A. cities encourage productivity and life B. cities encourage disconnection from...
*April 12, 2015*

**basic programming**

EVALUATE the following expressions NOT K OR L AND D + C = A NOT 3 OR 2 AND 12+12 = 7 D = true K = false C = ture
*April 12, 2015*

**Programming**

EVALUATE the following expressions A + S <> (D + K) * 4 =7 + 5 <> (12 + 3) * 4
*April 12, 2015*

**physics**

An electrical power plant generates electricity with a current of 50A and a potential difference of 20,000 V. In order to minimize the power losses due to the high current heating up the line, a transformer steps up the potential difference to 500,000 V before it is ...
*April 12, 2015*

**Physics**

The pressure of water flowing through a 6.5×10−2−m -radius pipe at a speed of 1.8m/s is 2.2 × 105 N/m2 What is the flow rate of the water? What is the pressure in the water after it goes up a 5.2−m -high hill and flows in a 5.0×10−2&#...
*April 12, 2015*

**L.A**

Thank you
*April 12, 2015*

**L.A **

Which sentence contains a participle phrase? A. she wanted to spend time writing. B. her job is giving the attic dwellers their food. C. quickly snatching up the coat, she ran to her room. D. to get along well requires cooperation. C ? please check
*April 12, 2015*

**Physics**

A car with a total mass of 1800kg (including passengers) is driving down a washboard road with bumps spaced 5.0m apart. The ride is roughest—that is, the car bounces up and down with the maximum amplitude—when the car is traveling at 6.1 m/s.What is the spring ...
*April 12, 2015*

**physics- Space**

How does the amount of dark matter in the Universe compare to the amount of ordinary matter? In what way is dark matter similar to ordinary matter? In what way are they different? I got the first one which dark matter is 23% of the universe. But for the other questions, the ...
*April 12, 2015*

**Math help!**

(sqrt(x^2-x)+3)(sqrt(x^2-x)-2)=0 two solutions a) sqrt(x^2-x)=-3 b) sqrt(x^2-x)=2 square both sides... a) x^2-x-9=0 b) x^2-x-4=0 which leads to a) x=(1+-sqrt(1+36))/2 b) x=(1+-sqrt(1+16))/2 check my thinking, I hope I didn't error in the algebra.
*April 12, 2015*

**Acct.101**

Post to the account Stock Investments. Common Stock Shares Cost Co.A
*April 12, 2015*

**algebra**

The examples in the slideshow, Division by Zero, which is located in the media section of Chapter 1, indicate that there is a different answer when 0 is divided by a number, rather than when a number is divided by 0.
*April 11, 2015*

**pre - CALCULUS**

Lmao thank you so much , your the best :)
*April 11, 2015*

**Business**

Social enterprises can earn a profit and free markets do not?
*April 11, 2015*

**Business**

How are social enterprises different from free market enterprises?
*April 11, 2015*

**Accountant Journal Entry Ledger**

paid $53000 cash for building and land. The building had a fair market value of $45000. Here is my answer. Date May 1. Debit Credit Account Transaction : Cash $53000 Building and Land. $45000
*April 11, 2015*

**Calculus**

The altitude (i.e., height) of a triangle is increasing at a rate of 2 cm/minute while the area of the triangle is increasing at a rate of 4 square cm/minute. At what rate is the base of the triangle changing when the altitude is 10.5 centimeters and the area is 97 square ...
*April 11, 2015*

**Statistics**

A school psychologist decided to separate some classes by gender to see if learning improved. She looked at studded scores on the final exam and obtained the following information: Students in boy-girl classrooms obtained an average of 71.4 on their final exams with a standard...
*April 11, 2015*

**businesss**

imagine you managing a tour guided business, explain by means of describing and examples how, institutional, physical and international environment affects your tourist guide business?
*April 11, 2015*

**Civics**

ok thanks!
*April 11, 2015*

**Civics**

A??
*April 11, 2015*

**Civics**

9th amendment The enumeration [listing] in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people. Based on this text, what can you infer about the founding Father's concerns in forming a constitution? They wanted to ...
*April 11, 2015*