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August 1, 2014

August 1, 2014

Post a New Question | Current Questions

**College physics - Center of mass**

College Physics- Center of Mass? The objects in the figure below are constructed of uniform wire bent into the shapes shown (Figure 1) . Each peice has a length of 0.15 . There are two objects that we need to figure out the x- and y-coordinates of the center of mass of the ...
*Wednesday, October 10, 2012 at 11:39pm*

**College Physics**

College Physics- Inertia? Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10−2 . How do you find this ? I know how to find the perpendicular and end . but this? About an axis along ...
*Wednesday, October 10, 2012 at 11:39pm*

**College Physics**

A 0.35 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 20° with the horizontal. Determine the speed of the stone. I've tried tan 20= gr/v^2 = (9.8)(.8)/v^2 = 4.7 m/s and that's not the correct answer (online ...
*Wednesday, October 10, 2012 at 9:40pm*

**English**

Find the word that means the same or almost in parenthesis in this story A range of factors (Motivated) immigrants to leave their homelands to come to America. Many sought to escape poverty or prejudice. Some wanted to follow dreams, such as promises of jobs, safe homes, or ...
*Wednesday, October 10, 2012 at 8:25pm*

**Statistics: Regression**

The June 1997 issue of Management Accounting gave the following rule for predicting your current salary if you are a managerial accountant. Take $31,865. Next, add $20,811 if you are top management, add $3604 if you are senior management, or subtract $11,419 if you are entry ...
*Wednesday, October 10, 2012 at 5:55pm*

**math**

If you borrow $15,000 from your dad for college and you agree to pay him $25,000 back at 8% compound interest per year. How many years do you think you have to do this? In other words, given the amounts and the interest rate, what is the number of years?
*Tuesday, October 9, 2012 at 10:39pm*

**college physics **

air flows through a main duct at a mass flow rate of 4kg/s the main duct enters a junction that splits into two branch ducts one with a cross section of 20cm x 30cm and one with a cross section og 40cm x 60cm if the mass flow rate in the large branch is 2.8kg/s what is the ...
*Tuesday, October 9, 2012 at 4:58pm*

**College US History**

Why did Americans demand written constitutions to define and protect rights?
*Tuesday, October 9, 2012 at 2:06am*

**College Physics**

A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, ...
*Tuesday, October 9, 2012 at 1:56am*

**College Physics **

A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
*Tuesday, October 9, 2012 at 1:29am*

**college math**

ok this is the last question i need help on. Abigail just received an inheritance from her grandfather's estate. She will be entering college in 1 year and is expecting to need $3,000, $5,000, $4,000, and $4,500 respectively at the beginning of each of the 4 consecutive ...
*Monday, October 8, 2012 at 10:56pm*

**College Physics**

Okay so the acceleration g on this planet X is 15 m/s^2 I have solved for all answers but this one. How long would it take the object to reach a height of 14.1 ? For an object thrown upward there are two times it would be at any hieght. Give the going up answer, a comma, and ...
*Monday, October 8, 2012 at 10:42pm*

**college math**

Raisel borrowed money from Irlene and agreed to pay back $400 today and $300 in 5 years. If Raisel has a lot of money available now and wants to pay back the loan today, how much money would she have to pay Irlene if the loan was at 6.75% compounded quarterly? For full marks ...
*Monday, October 8, 2012 at 10:38pm*

**college chemistry**

a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution to the sample, the student filtered the juice to remove the pulp and other particulate matter. Then the tudent added Na2CO3 solution to precipitate ...
*Monday, October 8, 2012 at 9:37pm*

**college math**

1. Rebecka borrowed $500, $5,000, $3,500, and $2,000 from her dad on September 1 of each of four successive years for college expenses. Rebecka and her dad agreed to a loan at the rate of 3.50% compounded monthly. If it is now 1 year from the last day that she borrowed money, ...
*Monday, October 8, 2012 at 9:29pm*

**college chemistry**

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...
*Monday, October 8, 2012 at 9:05pm*

**college chem**

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...
*Monday, October 8, 2012 at 9:03pm*

**college stats**

A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate statistic? What is the...
*Monday, October 8, 2012 at 10:56am*

**College Algebra**

The ratio of the surface area of a solid cube to its volume is 4 to 1. The diagonal of the cube is?
*Monday, October 8, 2012 at 10:36am*

**Chem II/College**

Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?
*Sunday, October 7, 2012 at 5:33pm*

**College Math Probability**

Let 1 <= k <= p−1, where p is prime. Show that p choose k is a multiple of p. What if p is not prime? I think here when we expand p choose k and then input few prime numbers then we always get a multiple of p . And same with when p is not prime.
*Sunday, October 7, 2012 at 1:32am*

**College Physics**

Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 51.5 N. If he does 3.85 102 J of work on the sled while exerting the force horizontally, through what distance must he have pushed it?
*Saturday, October 6, 2012 at 9:46pm*

**College Physics**

A ball of mass 620 g hangs from a spring whose stiffness is 195 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is stretched, and its length...
*Friday, October 5, 2012 at 9:40pm*

**college math**

Classify the triangle as scalene isoceles or equlateral and as acute, right or obtuse
*Friday, October 5, 2012 at 5:19pm*

**college algebra**

solve x^6 - 64 = 0
*Friday, October 5, 2012 at 1:14am*

**busines ethics and starting a small business**

I need exam answers to 25 questions that are on the the above college subject exam.
*Thursday, October 4, 2012 at 9:52pm*

**College Physics**

A body of mass m breaks up into 2 parts of rest mass m1 and m2 with velocity v1 and v2 ,what will be the energies of m1 and m2 in terms of m,m1,m2 and c,the velocity of light.
*Thursday, October 4, 2012 at 1:22pm*

**Computer Science**

Where can I find college grants and scholarships for men 2 deviations below standard in height?
*Thursday, October 4, 2012 at 3:51am*

**Geometry**

Complete Problem #28 in Section 1.5 Exercises (Chapter 1) of Essentials of Geometry for College Students. Use the table below to show your work and solve the problem. You may add or delete rows as necessary. Statements Reasons PQ=RS Given PS=PQ+RS Segment Addition Postulate PR...
*Thursday, October 4, 2012 at 2:17am*

**College Physics**

1. A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle? 2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 61.0° above the horizontal and was ...
*Wednesday, October 3, 2012 at 6:56pm*

**college physics**

A fighter-jet is in level flight at an altitude of 400m and with a speed of 200m/s. The fighter launches a rocket-powered missile horizontally from the underside of the jet. The rocket engine provided a constant horizontal acceleration of 25.0 m/s^2. a) how far does the ...
*Wednesday, October 3, 2012 at 12:12am*

**college physics**

a toy cannon fires a projectile from ground level with a speed of 15.0 m/s, at an angle of 30.0 degrees above the horizontal. a) calculate the horizontal range of projectile. R=Vi^2/g * sin 2theta = (150/9.8)*(sin(2*30.0) = 19.88m I know this part is right but i'm not sure...
*Wednesday, October 3, 2012 at 12:11am*

**College math**

in a circle of radius 7m, find the length of the arc subtended by a central angle of 42.0degrees
*Tuesday, October 2, 2012 at 5:37pm*

**English**

I am writing my college essay. I amwriting about the most unforgettable experience i've had and how it impacted my life. I am writing about when my dad was arrested. I have my opening (see below) but I dont know how to continue can you help. The opening is When I refelct ...
*Tuesday, October 2, 2012 at 11:27am*

**College Chemistry**

how do i calculate the moles of Na2CO3 present in the original 25.00mL aliquot of carbonate solution?? the tared mass of Na2CO3 is 1.5179g
*Tuesday, October 2, 2012 at 2:01am*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...
*Monday, October 1, 2012 at 11:52pm*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...
*Monday, October 1, 2012 at 11:51pm*

**college stats**

can someone please explain the steps: suppose that the grade point average,denoted by X,of a university student is Normally distributed with the mean 2.786 and standard deviation 0.375 A). a student is on the deans list if her GPA exceeds 3.746. What percent of the students ...
*Monday, October 1, 2012 at 11:47pm*

**college chemistry**

In the derivation of this expression: [ln]/[HIn]A# 2 * A#1,acid/A# 2,basic * A#1 We assumed that the HIn form of the indicator is the only form present in the most acidic solution. Is this a valid assumption? Why or why not? Support your answer by determining the ...
*Monday, October 1, 2012 at 8:05pm*

**college physics**

By immersing a crown in water its volume is 26inc^3=4.2x10^-4m^3. what would its weight be if it were pure gold? What would its weight be if its volume were half gold and half lead?
*Monday, October 1, 2012 at 2:02am*

**College Physics**

a 5.63kg ball hangs from a vertical pole by a 2.4 long string. Assume the ball is moving at 4.33m/s in a horizontal circle with the string remaining taut. Calculate the angle that the string makes with the pole.
*Monday, October 1, 2012 at 12:55am*

**College Physics**

If the spring is compressed a distance of 0.150 m and the gun fired vertically as shown, the gun can launch a 27.6g projectile from rest to a maximum height of 16.1 m above the starting point of the projectile. Neglecting all resistive forces, determine the spring constant. ...
*Sunday, September 30, 2012 at 8:44pm*

**College Physics**

The ball launcher in a pinball machine has a spring that has a force constant of 1.50 N/cm. The surface on which the ball moves is inclined a = 14.5o with respect to the horizontal. If the spring is initially compressed 4.70 cm, find the launching speed of a 0.113 kg ball when...
*Sunday, September 30, 2012 at 8:43pm*

**College Physic**

can someone help me with this question? Thank you! You have taken a summer job at a warehouse and have designed a method to help get heavy packages up a 15º ramp. In your system a package is attached to a rope, which runs parallel to the ramp and over a pulley at the top ...
*Sunday, September 30, 2012 at 12:33pm*

**college algebra**

The grocery stocks yougurt in 2 refridgerators and sells them for 2.20 per container. Overnight one refridgerator malfunctions and ruins 15 containers of yogurt. The leftover yogurt sold for $3.98 each. How many containers did the store have to begin with if they made a profit...
*Saturday, September 29, 2012 at 11:10pm*

**colleGe math**

y=-2|x| Will someone please explain how I'm supposed to graph this?
*Saturday, September 29, 2012 at 9:59pm*

**collEge math**

x^3-27
*Saturday, September 29, 2012 at 9:43pm*

**colLege math**

(2x-1)(x^2-4x+3)
*Saturday, September 29, 2012 at 9:41pm*

**coLlege math**

√6x*√3x^2
*Saturday, September 29, 2012 at 9:37pm*

**cOllege math**

14x^2+5-[7(x^2-2)+4]
*Saturday, September 29, 2012 at 9:31pm*

**College math**

(-30a^14b^8/10a^17b^-2)totally lost on me??
*Saturday, September 29, 2012 at 9:30pm*

**College algebra**

(2x-3)(x^2-3x+5)
*Saturday, September 29, 2012 at 8:44pm*

**College algebra**

How do I solve this?(7x+5y)^2
*Saturday, September 29, 2012 at 8:42pm*

**college algebra**

(x+5y)(7x+3y)How do I solve this. I know I have to somehow combine the x and y but can't remember.
*Saturday, September 29, 2012 at 8:39pm*

**college math **

Find the measures of angles 1 through 5 in the figure shown. if the angles are 78 degrees and 42 degrees.
*Saturday, September 29, 2012 at 5:33pm*

**college algebra**

how do I solve this: (17x^3-5x^2+4x-3)-(5x^3-9x^2-8x+11) and putting the resulting polynomial in standard form?
*Saturday, September 29, 2012 at 2:03pm*

**College Chemistry**

calculate the moles of sulfuric acid that remained in the solution after reaction with the carbonate. the tared mass of carbonate is 1.5179g
*Friday, September 28, 2012 at 9:35pm*

**College Chemistry**

calculate the average volume of sodium hydroxide required for the titration of 25.00mL of the standard sulfuric acid solution. From my data i have trial 1 and 2 to be 19.80ml and 19.80ml of NaOH used so do i just add them and divide it by two to get the average?
*Friday, September 28, 2012 at 7:30pm*

**college physics**

Two charges are placed on the x axis. One of the charges (q1 = +8.71C) is at x1 = +3.00 cm and the other (q2 = -28.6C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm. Please help!
*Friday, September 28, 2012 at 1:14pm*

**college algebra**

An open box is made from a square piece of cardboard 20 inches on a side by cutting identical squares from the corners and turning up the sides.(a) Express the volume of the box, V , as a function of the length of the side of the square cut from each corner, x. (b) Find and ...
*Thursday, September 27, 2012 at 11:36pm*

**College Chemistry**

how would you prepare 175.0ml of .150 m agno3 solution starting with pure agno3
*Thursday, September 27, 2012 at 6:29pm*

**college physics**

An 7.81g bullet is fired into a 220g block that is initially at rest at the edge of a table of h = 1.15 m height.The bullet remains in the block, and after the impact the block lands d = 2.13 m from the bottom of the table. Determine the initial speed of the bullet.
*Thursday, September 27, 2012 at 12:30pm*

**College Physics**

What minimum speed does a 95.9 g puck need to make it to the top of a 2.7-m-long, 15° frictionless ramp?
*Thursday, September 27, 2012 at 11:30am*

**College algebra**

Find the maximum value of: y=-3x^2 -15x +1
*Wednesday, September 26, 2012 at 10:02pm*

**College Physics **

Vector subtraction (F1 - F2) is a special case of vector addition, since F1- F2 = F1 + (-F2). Use the data (magnitude and direction) of F1 and F2 obtained in measurement 1 to find out the magnitude and direction of the resultant vector of F1 - F2. The data is: F1: 200g and 30...
*Wednesday, September 26, 2012 at 9:36pm*

**Physics**

As a civil engineering intern during one of your summers in college, you are asked to design a curved section of roadway that meets the following conditions: When ice is on the road, and the coefficient of static friction between the road and rubber is 0.077, a car at rest ...
*Wednesday, September 26, 2012 at 8:31pm*

**College Physic**

I am having problem with this one physic problem. I am not sure where to start can someone help me? Thank You! A 15.0 kg box falls out of an Jet at an altitude of 3000 meters. It reaches a terminal speed of 50 meters per second in 3.20 seconds. Calculate the force of air ...
*Wednesday, September 26, 2012 at 7:44pm*

**College Algebra**

solve the equation for r: S= (rL-a)/(r-x)
*Tuesday, September 25, 2012 at 11:38pm*

**College Algebra**

A jet flies from Atlanta to Dubuque a distance of 900 miles. After traveling the same amount of time on the return flight,the pilot mentioned they still had 150 miles to go. The airspeed of the plane was 300 miles per hour. How fast was the wind blowing?
*Tuesday, September 25, 2012 at 10:25pm*

**College Chemistry**

How many grams of H3BO3 forms when 28.16 grams B2H6 react with excess water?
*Tuesday, September 25, 2012 at 5:16pm*

**College Physic**

Can some one please help me with this question? An iron bolt of mass 121.1 g hangs from a string 1.2 m long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, but is displaced horizontally 0.28 m to the right ...
*Tuesday, September 25, 2012 at 10:44am*

**math**

As an entrepreneur, there are going to be many decisions that you need to make, such as the price to charge your customers for your goods and services. You have just graduated from college and recently opened a specialty pizza restaurant. Based on surveys conducted in your ...
*Tuesday, September 25, 2012 at 12:00am*

**college physics**

An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.5 N; a second force has a magnitude of 3.9 N and points in the negative y direction. Find the direction and magnitude of the ...
*Monday, September 24, 2012 at 11:35pm*

**Finance**

Professor Anderson has a daughter who is 3 years old. In 15 years she will go to college and he is uncertain whether he has saved enough to finance her college education. Based on his reading, he believes that it will cost $208,000 to pay for his daughter’s education in ...
*Monday, September 24, 2012 at 11:24pm*

**math**

A college bookstore ordered six boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in each box?
*Monday, September 24, 2012 at 10:08pm*

**Finance**

Professor Anderson has a daughter who is 3 years old. In 15 years she will go to college and he is uncertain whether he has saved enough to finance her college education. Based on his reading, he believes that it will cost $208,000 to pay for his daughter’s education in ...
*Monday, September 24, 2012 at 9:30pm*

**college physics**

A new planet has been discovered that has a mass one-tenth that of Earth and a radius that is one-sixth that of Earth. Determine the free fall acceleration on the surface of this planet. Express your answer in the appropriate mks units.
*Monday, September 24, 2012 at 4:19pm*

**college physics**

Although astronauts appear weightless, they are not. They only appear weightless because they are in free fall. If a 79 kg astronaut is orbiting Earth with an orbital radius of 5.31×107 m, determine how much the astronaut would weigh. Earth's mass is 5.974 1024 kg.
*Monday, September 24, 2012 at 4:17pm*

**college physics**

new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 21 AU and takes 118 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units. [NOTE: AU stands for &...
*Monday, September 24, 2012 at 4:17pm*

**Houston community college**

A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The final horizontal and ...
*Monday, September 24, 2012 at 12:35pm*

**College Algebra**

Use the distributive property to rewrite the expression (b+6)8=
*Sunday, September 23, 2012 at 7:57pm*

**1301 history (college)**

What did the massachusetts bay puritans do?
*Sunday, September 23, 2012 at 12:16pm*

**college algebra**

Deshaun is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A has no initial fee but charges .70 cents for every mile driven. Company B charges an initial fee of $50 and an additional .20 cents for every...
*Saturday, September 22, 2012 at 1:35pm*

**college-chemistry**

How do you know when a base is weak or strong?
*Saturday, September 22, 2012 at 1:15am*

**College Math**

In a suburb, housing costs have been increasing at 5.2% per year compounded annually for the past 8 years. A house worth $260,000 now would have had what value 8 years ago?
*Friday, September 21, 2012 at 11:32pm*

**college math**

its estimated that between 1815 and 1975 some 2,580,071,000 copies of the bible were printed. write the word name for 2,580,071,000.
*Friday, September 21, 2012 at 11:22pm*

**Question regarding college**

Alright, I have a question. Last year was my freshman year in high school, and I didn't really care about my grades. I wasn't failing, but they werent excellent. They were about average. This year, I am making almost all a's, im in honors classes, and im working my...
*Friday, September 21, 2012 at 8:46pm*

**essay**

Imagine that you are hosting a group of exchange students next term. You are responsible for welcoming the students to campus and acquainting the students with life on campus socially as well as academically. Develop a "Welcome Letter" for the visiting students. Keep...
*Friday, September 21, 2012 at 6:01pm*

**college us history to 1877**

you need to compare and Contrast the New England, Southern and Middle colonies using geography including a appraisal of a geographic perspective that considers physical and cultural processes as they effect the areas, population, reason for coming to America, religion, and ...
*Thursday, September 20, 2012 at 6:30pm*

**college us history to 1877**

compare and Contrast the New England, Southern and Middle colonies using geography including a appraisal of a geographic perspective that considers physical and cultural processes as they effect the areas, population, reason for coming to America, religion, and economy.
*Thursday, September 20, 2012 at 2:52pm*

**music**

why college students learn about music that is not their favorite type
*Thursday, September 20, 2012 at 3:20am*

**statistics**

Suppose a college's SAT scores are normally distributed with mean 1000 and standard deviation 1 for students above 1200. What percentage of students is eligible for scholarships
*Wednesday, September 19, 2012 at 2:55pm*

**college-physics**

how to write scientific report on physics
*Wednesday, September 19, 2012 at 2:19am*

**statistics**

Pre study scores versus post-study scores for a class of 120 college freshman english students were considerated. The residual plot for the least squares regression line showed no pattern. The least square regression line was y = 0.2 + 0.9x with a correlation coefficient r = 0...
*Tuesday, September 18, 2012 at 11:59pm*

**college algebra**

x^4+2x^2-15=0
*Tuesday, September 18, 2012 at 9:56pm*

**SS8R: The National Convention The Female Voice**

Here it is: National Convention Speeches: The Female Voice During the month of September 2012, both the Republicans and Democrats held their national conventions. Several political figures, entertainers and everyday people were invited to speak in favor of their respective ...
*Tuesday, September 18, 2012 at 6:31pm*

**college pre-calculus**

An investment of $4000 is deposited into an account in which interest is compounded monthly. Complete the table by filling in the amounts to which the investment grows at the indicated times. (Round your answers to the nearest cent.) r = 4%
*Tuesday, September 18, 2012 at 3:34pm*

**Physics**

I am in need of some basic tools in which to become better prepared to excel in my "Conceptual Physics" college course. I am a retired veteran of the Army and have not been in school for 25 years. Some reference charts for Trigonometry, basic glossary for any ...
*Tuesday, September 18, 2012 at 7:05am*

**college-chemistry**

calculate the ph of a buffer solution prepared by adding 0.397 mole of the sodium salt of a weak organic acid HA to 0.474 L of 1.023m acid HA with pka=4.82 and diluting to 1.00 L WITH WATER
*Tuesday, September 18, 2012 at 3:26am*

**Finite Math (college)**

EventProbability Too much enamel0.27 Too little enamel0.2 Uneven application0.35 No defects noted0.43 (1) What is the probability of a paint defect? (2) What is the probability of a paint defect which includes an improper amount of paint? (3) What is the probability of a paint...
*Monday, September 17, 2012 at 10:10pm*

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