Friday

May 22, 2015

May 22, 2015

Total # Posts: 862

**Physics PLEASE HELP**

Nitrogen gas molecules, which have mass 4.65×10−26 kg, are striking a vertical container wall at a horizontal velocity of positive 440 m/s. 5.00×1021 molecules strike the wall each second. Assume the collisions are perfectly elastic, so each particle rebounds...
*June 3, 2012*

**PHYSICS!!!**

A net force of 30 N is applied to a 10 kg object, which starts at rest. What is the magnitude of its momentum after 3.0 seconds? Can someone please explain this as you go through the steps? I already know the equation is p=mv and I know that mass is 10kg and I just need v...
*June 2, 2012*

**Calculus**

Find the volume or the solid generated by revolving around the region bounded by the graphs of the equations about line x=6. xy=6, y=2, y=6, and x=6
*May 28, 2012*

**math (please double check my answers)**

4. Prove: 2^n + 2^n = 2^n+1
*May 27, 2012*

**math **

6. Determine the domain and range for each function given. Explain where any restrictions come from. a. f(x)= sqrt x + 5 – 4 b. f(x) = 1/2x^2 – 32 c. f(x) = 4/x^2 + 1
*May 24, 2012*

**College Algebra**

Solve the equation. If necessary, round to the nearest thousandth. 5(2x-1)=10
*April 20, 2012*

**physics**

Suppose the spring in this spring-powered rifle has a spring constant of k = 1,000 N/m. How much work can it do in accelerating the projectile, if it is compressed by x = 0.10 m?
*March 16, 2012*

**science**

Overpopulation. Increase population=decrease of natural resources.
*March 15, 2012*

**Chemistry**

I know that I am close to the answer using this formula with plugged in information: ln p2/760= 40500/8.314(1/273-1/351.1) Just not sure what I am doing wrong. Is someone could assist me that would be greatly appreciated! thanks :)
*March 15, 2012*

**Chemistry**

The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?
*March 15, 2012*

**algebra**

Write an exponential function to model the situation. Then predict the value of the function after 5 years (to the nearest whole number). A population of 210 animals that increases at an annual rae of 19% Can you explain your answer please?
*March 15, 2012*

**Algebra II**

If F(x)=x^2-x+1 and g(x)=-3x+6, what is the product of f(-1) and g(3)? Help please.
*March 2, 2012*

**Chidren,Families,and Society**

I believe the answer is D
*February 20, 2012*

**math**

how do you find the derivative of f(x)=2x/(x^2+x+1)^1/2 HELP A.S.A.P.?
*February 17, 2012*

**Algebra 2**

(x-4)^3/2 = -6 In the end I got .69, but that's wrong. Please help. I don't really understand. My work. x-4 = -6^2/3 x=4-6^2/3 x=.6980727511
*February 13, 2012*

**Physics**

A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the man is initially 2.75 m above the level of the saddle. (a) What must be the horizontal distance between the saddle and limb ...
*February 7, 2012*

**math**

The final math grades for all 6th graders were A: 125, B: 200, C: 350, D: 95, and F: 25. Make a bar graph to display this data. In the box below, write a description of your bar graph.
*February 2, 2012*

**science**

False
*January 26, 2012*

**Algebra 2**

Solve each equation by graphing. Where necessary, round to the nearest hundredth -x^3+2x^2+1=0
*January 25, 2012*

**Algebra 2**

Solve each equation by graphing. Where necessary, round to the nearest hundredth x^4+2x-3= 0
*January 25, 2012*

**Algebra 2**

Solve each equation by graphing. Where necessary, round to the nearest hundredth -x^3+3x+4=0
*January 25, 2012*

**chemistry**

CxHyCz compound weighs 132 amu, what is the molecular formula?
*January 23, 2012*

**Algebra**

Thank you. :)
*January 11, 2012*

**Algebra**

So would it be (x-1)(x+1)?
*January 11, 2012*

**Algebra**

Factor x^2-1=0 How do you factor when there is no B in this equation?
*January 11, 2012*

**Algebra**

It says to complete the square for x^2-4x-2=0 How do you do this? Please help.
*January 11, 2012*

**english**

what is the correct way to write, (A characteristic I dislike is someone who is weak).
*December 6, 2011*

**physics**

A 2 kg ball is dropped from a height of 433 mm. Calculate the height (above the ground) at which KE is one third of PE.
*December 3, 2011*

**Biology**

In order to predict the percentage of males and females three assumptions must be considered: 1. The X carrying sperm and Y carrying sperm have an equal chance of fetilization: 2. The egg and sperm combine at random: 3. the XX and XY zygotes have equal chance of development at...
*November 24, 2011*

**chemistry**

Reaction with the presence of sunlight would be: CH4 + Br2 --> CH3Br + HBr
*November 22, 2011*

**Math**

Sam drives his car 23,040 miles per year. Find this rate in the number of miles driven per month, to the nearest mile
*November 10, 2011*

**Calculus**

Suppose f(pi/3) = 3 and f '(pi/3) = −7, and let g(x) = f(x) sin x and h(x) = (cos x)/f(x). Find the following. a. g'(pi/3) b. h'(pi/3)
*November 7, 2011*

**calculus**

How do I rond three decimal places?
*November 7, 2011*

**Algebra**

Use slopes and intercepts to determine if the following system is consistent, inconsistent, or dependent. -4x - 5y = 20 -12x - 30y = 60
*November 3, 2011*

**Algebra**

x/4 - y/2 = -11/4 x/4 + y/2 = 1/4 solve the system
*November 3, 2011*

**Calculus**

The number N of US cellular phone subscribers (in millions) is shown in the table. (Midyear estimates are given.) t 1996 1998 2000 2002 2004 2006 N 44 69 109 141 182 233 (a) Find the average rate of cell phone growth between the following years. In each case, include the units...
*October 29, 2011*

**Math**

An employee has two hourly wage options for positions in a large corporation. One position pays $11.00 plus additional unit rate of $0.50 unit produced. The other pays $7.25 plus a unit rate of $1.25. W(x)=11+0.5x M(x)=7.25+1.25x I need to find the solution for the systems by ...
*October 22, 2011*

**math**

my equation is m 2=c. I want to use my equation to find the cost of a 60-mile trip.
*October 17, 2011*

**history 101**

why did the development of civilization in the americas and sub saharan africa differ so dramatically from development in Eurasia? why did certain Eurasia civilizations thrive while others collapsed during the first millenium B.C.E.
*October 16, 2011*

**Algebra**

Would this be B? 3(-1) - 2(-2) = 1 (-3) - (-4) =1 1 = 1
*October 13, 2011*

**Algebra**

What is the standard form of the equation of the line passing through the point (-1,-2) and perpendicular to the line y= - 2/3x - 1? a. 3x-2y=-1 b.3x-2y=1 c.3x+2y=1 d.3x+2y=-1 I don't understand, can anyone help me please?
*October 13, 2011*

**Hard math**

Solve for x using the laws of logarithms. ln(ln x)= 1
*October 5, 2011*

**physics**

In suddenly the value of G, the gravitational constant, increased to a billion times its actual value, what sorts of things would happen?
*October 5, 2011*

**Algebra**

Simplify the expression. Write the answer without negative exponents. (4a^3b^3)(4ab^2)^2
*September 29, 2011*

**Chemistry**

nevermind
*September 18, 2011*

**Chemistry**

Given the Empirical formula: C6H7N, and a molecular mass of 372.52 g/mol, How do I find the MOLECULAR formula for the compound?
*September 18, 2011*

**Math**

Use the distance formula to determine whether the points lie on the same line. (0,4),(7,-6),(-5,11). I know the distance formula, but I don't see how that will help me find out if they lie on the same line.
*September 16, 2011*

**English**

Write the list words that contain the same o sounds as the examples given. Use the order of the o sounds as shown in the examples. (upsidedown)/e/ as in collect or companion 1 2 3 4 5 (withtwodots)/a/ as in lot 6 7 8 (upsidedown)/e/ as in collect and (lineoverit)/o/ as in ...
*September 14, 2011*

**geometry**

what is the base and heigt of a triangle that has an area of 27 feet squared and the height is 3x base?
*September 14, 2011*

**Algebra**

In an election between two candidates, 530 votes were cast. If the winner received received 150 more votes than the loser, how many votes did the winner receive? a. 380 votes b. 680 votes c. 340 votes d. 190 votes help? I got 415, but it's not an answer.
*September 13, 2011*

**HUM 176**

Helping with good idea would be great.
*September 11, 2011*

**math**

jhdckgcdxhkgjvfjhbdj
*September 6, 2011*

**biology**

many organelles and molecules needed for cell division are formed after DNA replication and before mitosis.In which phase are they formed??
*September 6, 2011*

**math**

im pretty sure you could do x2+bx2+c2+ax2 idk how to put the 2s they way you put it up there lol but you get the idea
*September 6, 2011*

**sara**

find the period of: y= -(1/2)cos3x)
*August 26, 2011*

**math**

find the fundemental period of f when: f(x)=2cos(3x)
*August 25, 2011*

**math **

i have been these are the only ones that i have problems with because i forgot how to do it nevermind then
*August 12, 2011*

**math **

a cube with 2-inch sides is placed on a cube with 3-inch sides. Then a cube with 1-inch sides is placed on the 2-inch cube. What is the surface area of the three cubes?
*August 12, 2011*

**math **

A classroom measures 32ft long, 25ft wide, and 9ft high. The combined area of doors and window is 140 ft^2. What is the remaining area of the four walls of the room?
*August 12, 2011*

**math **

a steel cargo container is shaped like a cube measuring 5.2ft on each edge. How much steel is needed to make this container?
*August 12, 2011*

**math**

would the weight be 0.42 you would get that from multplying 0.05*8.4 then you would have to convert the 0.42 into lb.
*August 12, 2011*

**math**

a bowling ball has a diameter of 8.4 in. It is made of plastic that weighs 0.05lb/in cubed.Find the weight of the bowling ball
*August 12, 2011*

**geometry**

how many milliliters of soup will this hemispherical bowl hold?(1cm cubed holds 1mL) Radius= 7 cm
*August 12, 2011*

**math **

a peanut butter jar has a height of 5.9in and diameter of 3.6 in. one cubic inch holds 0.45 oz of peanut butter. How many ounces will fit in the jar
*August 12, 2011*

**geometry**

jo was comparing two cylinders that both had a radius of 5cm. the first had a height of 10cm, and the other a height of 20cm. How many times greater was the volume of the larger cylinder?
*August 12, 2011*

**math **

a ferris wheel with a diameter of 76m. about how far would you travel in 8 turns ?
*August 10, 2011*

**geometry**

when two lines intersect, they form two pairs of "opposite" angles called _________ angles?
*August 10, 2011*

**geometry**

when two angles in a plane share a vertex and a side but no common interior points, they are called_________ angles ?
*August 10, 2011*

**geometry**

a spherical water storage tank has a radius of 10ft. A cubic foot of water is about 7.5 gallons. How many gallons of water will the tank hold?
*August 10, 2011*

**Med terms**

When I took this class, I went with the word distention. It is spelled wrong. It is suppose to be distension. I don't remember what my grade was but you can try that one too. I could be wrong but I just wanted to throw something out there.
*July 12, 2011*

**math 1A**

ln(a+b) + ln(a-b) -2ln c
*July 10, 2011*

**maths**

3(p+1)-p(p+1)
*June 20, 2011*

**maths**

factorising by grouping.a+(ab+bd)+(ac+cd)
*June 20, 2011*

**Science**

A stationary roller coaster at the top of its path is 30m about the ground. The car and its passengers have a mass of 400kg. What is the velocity of the car when it reaches the ground lever? The formula for velocity is (Distance/time)
*June 6, 2011*

**american history**

I thought that because of the XYZ affair that realations between America and France declined.. Correct?
*May 31, 2011*

**Math**

how do you solve a linear system. 7. x-y=8 x+y=-2
*May 31, 2011*

**science**

What is a simple definition for the 2nd law of Thermodynamics?
*May 25, 2011*

**Math**

How do you solve the problem: x minus 6.2 is less than or equal to 8 ; x=14
*May 21, 2011*

**Ap physics B**

Four positive charges are fixed at the corners of a square, as shown above. Three of the charges have magnitude Q, and the fourth charge has a magnitude 2Q. Point P is at the center of the square at a distance r from each charge. 22. What is the electric potential at point P...
*May 15, 2011*

**Chemistry (Gas Laws) I REALLY NEED HELP**

Ok thanks, so do you just find the molar mass of those 8 grams of water to find moles?
*May 10, 2011*

**Chemistry (Gas Laws) I REALLY NEED HELP**

A 27.8 liter container is initially evacuated, and then 8.8 grams of water is placed in it. After a time, all the water evaporates, and the temperature is 130.8 degrees C. Find the final pressure.
*May 10, 2011*

**Chemistry**

Neutrons are more effective than protons or alpha particles for bombarding atomic nuclei. Why?
*May 4, 2011*

**Science**

Can someone please explain what Newtons 3 laws mean? i don't understand the text book definition.
*May 1, 2011*

**Math**

I am solving inequalities then graphing my solution. in a problem such as -2(c-1)<-22 how do i solve this? and also how do i know the greater then less then sign is going the right way?
*May 1, 2011*

**Science**

the ideas didn't show up
*May 1, 2011*

**Science**

How do you make an egg drop without it breaking?
*May 1, 2011*

**Math**

How do I help my little brother with negative numbers? He doesn't understand when it is positive and when it is negative.
*May 1, 2011*

**Science**

What is friction? I don't understand the definition.
*April 30, 2011*

**Algebra (Quadratic Equations)**

Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < - X ^ 2 X^2 + Y^2 < 16
*April 27, 2011*

**Algebra**

Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < - X ^ 2 X^2 + Y^2 < 16
*April 26, 2011*

**Algebra**

Is the point (-3,-2) a solution of the intersection of the following set of quadratic equations: Y < -X ^ 2X^2 + Y^2< 16
*April 26, 2011*

**medical billing**

for medicaid cases there is no assignment of benefits unless the patient has other insurance in addition to medical. true or false 2. a two or three form that incorporates a bill, insurance form,and routing document used both computer and paper based system is called an ...
*April 23, 2011*

**medical billing & coding**

If a patient has an individual insurance policy, a release of information does not have to be signed before the physician's office submits a claim to the insurance company. true or false . i put false is that correct
*April 23, 2011*

**health care**

the insured may not necessary be the patient seen for medical service. true or false
*April 23, 2011*

**medical billing & coding**

insurance claims may not be legally denied for payment even if submited after the insurance company's time limit. true or false
*April 23, 2011*

**biology**

a male___________ of an angiosperm is a pollen grain.
*April 20, 2011*

**Chemistry**

Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) If 1.0g of Mg is reacted with 10.0mL of 6.0M HCl, what volume of hydrogen gas will be produced at 298K & 1atm?
*April 15, 2011*

**Ap physics b**

A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average ...
*April 6, 2011*

**geometry**

An airplane over the pacific sights an atoll at 8 degree angle of depression. If the plane is 520hm above water, how many kilometers is it from a point 520 m directly above the center of the atoll? Help please :]
*April 4, 2011*

**geometry**

A cable 22 feet long runs from the top of a utility pole to a point on the ground 15 feet from the base of the pole. How tall is the utility pole? - thanks!
*March 28, 2011*