Wednesday

October 7, 2015
Number of results: 23,015

**Physics**

Susie is out fishing on a calm, sunny day. She hooks an old tire that is resting on the lake bottom, and hauls it into her boat. In principle, how does the water level of the lake change?
*June 24, 2012 by Jamie*

**Pysics**

Brass is an alloy made from copper & zinc. A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C. If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C. Answer in units of J/kg C
*December 17, 2012 by Anonymous*

**physics**

Brass is an alloy made from copper & zinc. A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C. If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C. Answer in units of J/kg C
*December 17, 2012 by Anonymous*

**physics**

A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.
*December 18, 2012 by Danny*

**physics**

A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.
*December 19, 2012 by Anonymous,*

**physics**

A 2561-kg van runs into the back of a 823-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.
*December 20, 2012 by Anonymous,*

**Physics**

A 2563-kg van runs into the back of a 826-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.
*January 15, 2013 by Caleb*

**trig/sig figs**

There are 60" in 1', 60' in 1°, and 2π radians in 360°. Convert arc-seconds into radians. KEep 6 significant figures. If someone could help and walk me through this process, it would be soooo appreciated!
*January 17, 2013 by carl*

**math**

a 3 cm by 3 cm by 3 cm cube is painted all over its outside and is then cut into 27 smaller cubes. How many of these small cubes have paint on more than one face? please explain how you work it out,thanks
*February 10, 2013 by karen*

**psychology**

a person was asked to break down into its basic elements the immediate experience of eating an apple. this approach represented the ________ school of psychology a.behaviorist b.functionalist c.structuralist d.psychoanaytical
*July 25, 2013 by meka*

**Science**

Which of the following is a disadvantage of external fertilization. a) gametes are released into the surroundings b) gametes are washed away c) the developing zygote is protected d) large number of eggs can be produced at one time
*October 31, 2013 by Steve*

**Math Properites**

Mohammed copies this problem into his notebook (3.4x10^5)(3.8x10^-9) A. Use the associateve and commutatitive properties to rearrange the factors. B. Find the product. Write the product in standard form.
*November 20, 2013 by andra *

**social studies**

why did the neo native americans groups settle down into communities ? a) to stay clear to euorpeans b) to make alliances against the europeans c) to farm d) to stay near water
*December 9, 2013 by victoria *

**Science**

A male peacock displays his colorful tail in order to...... A. increase the success rate of asexual reproduction B. increase the gestation period. C. release gametes into his surroundings D. attract a mate
*January 28, 2014 by Amber*

**Science**

Which of the following is disadvantage of internal fertilization? A. Gametes are released into the surroundings. B. Gametes may get washed away. C. The developing zygote is protected. D. Larger numbers of eggs can be fertilized at one time
*January 28, 2014 by Amber*

**Science**

Which of the following pairs of structures share the function of reabsorbing water into the body? a- Lungs, Stomach b- bone marrow, small intestine c- hypothalamus, pancreas d- large intestine, kidney D?
*February 20, 2014 by Anonymous*

**chem**

Hydrogen iodide can decompose into hydrogen and iodine gases. 2HI(g) mc026-1.jpg H2(g) + I2(g) K for the reaction is 0.016. If 0.148 atm of HI(g) is sealed in a flask, what is the pressure of each gas when equilibrium is established?
*March 5, 2014 by jason*

**Math**

Hello I need help on this problem: The directions for lemonade say to put 2 cups of the, liquid concentrate into 1 gallon of water. If I want to make 1 pint of lemonade, how many fluid ounces should I use.
*April 16, 2014 by Anonymous*

**chemistry**

two metals (copper and aluminum ) were placed into two separate beakers which both contained 0.5M CaCl2. Give a detailed description as to what might observed in each beaker as time progressed
*June 14, 2014 by iqra*

**physics**

A 2.53-μC charged particle with a kinetic energy of 0.0929 J is fired into a uniform magnetic field of magnitude 0.147 T. If the particle moves in a circular path of radius 2.92 m, determine its mass.
*July 21, 2014 by Caty*

**English: Punctuation**

That morning my family and I were sitting in our car, ready to make a trip into town. In the previous sentence, does there need to be a comma after "That morning?" I think there does but I'm not entirely sure.
*September 1, 2014 by Anonymous*

**physics**

A North American tourist takes his 22.0–W, 120–V AC razor to Europe, finds a special adapter, and plugs it into 240 V AC. Assuming constant resistance, what power does the razor consume as it is ruined?
*September 13, 2014 by Joe*

**english**

Combine these sentences into one sentence using conjuctions,adverbal connectives to create compound sentence. It was idle to attempt to ascertain the state of her affections. She didn't have an expressive manner. Thank you.
*February 18, 2015 by Sam*

**finite math **

A young couple saves for a down payment on a house by depositing $100 each month into an annuity that pays a 4.8% annual rate. Find the amount in the annuity at the end of 2 years.
*March 27, 2015 by j*

**to damon**

thanks,,,, my course (which was very word intensive) Never used the term "expand", but went into depth on simple problems with pascals triangle. I think now I understand the principle behind the problems.
*June 7, 2015 by lamar*

**phyiscal science**

calculate the height a block of ice at -25 deg C must be dropped in order to completely melt on impact. No air resistance and all energy goes into melting the ice.
*August 11, 2015 by ja*

**physics**

A 200g Nerf dart is shot from a dart gun with a kenetic energy of 3.60J. What was the initial speed of the dart? >>> change g into kg Formula(i think) is: Ek=1/2 mv2 Helppp?
*April 29, 2008 by chyanne*

**chemistry**

How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254g B. 127g D. 42.3g E. 31.8g
*May 24, 2008 by Mable*

**chemistry**

How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254 g B. 127 g C. 63.5 g D. 42.3 g E. 31.8 g
*May 24, 2008 by Rapinder S.*

**social science: Plz Answer**

I need articles that pertain to this question. How does a teacher evaluation for a student's entry into a program (ex. summer program) determine his success in the program?
*July 29, 2008 by Linda*

**math**

simplify. x^3/5x^2x^-1/2 would i first flip x^-1/2 to x^-2, therefore x^2 and x^-2 would cancel out, so the answer would just be x^3/5? or do i continue to change the exponent into 5 square root of x^3? am i doing this right?
*October 1, 2008 by Anonymous*

**Chemistry**

The Ksp for PbF2 is 7.1 x 10 to the(-7). The Kb for the F- anion is 1.4 x 10 to the(-11). A student weighs out 2.5 g of PbF2, places it into 100mL of deionized water and stirs. a) Will there be any solid PbF2, left in the flask? b) What is the pH of the solution?
*April 12, 2010 by Anmol*

**Chemistry**

The Ksp for PbF2 is 7.1 x 10 to the(-7). The Kb for the F- anion is 1.4 x 10 to the(-11). A student weighs out 2.5 g of PbF2, places it into 100mL of deionized water and stirs. a) Will there be any solid PbF2, left in the flask? b) What is the pH of the solution?
*April 12, 2010 by Anmol*

**Algebra 2**

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x – 2y = 2 x + 3y = 17
*April 25, 2011 by Mike*

**AP Chem**

At a particular temperature, K = 1.00 102 for the following reaction. H2(g) + I2(g) 2 HI(g) In an experiment, 1.23 mol H2, 1.23 mol I2, and 1.23 mol HI are introduced into a 1.00 L container. Calculate the concentrations of all species when equilibrium is reached.
*January 8, 2012 by Bill *

**math**

a rectangular tank has the measurement 60cm wide and 2000cm2 water flows into the tank at the rate of 8 liters per minutes how long will it take to fill the tank?
*April 23, 2012 by john*

**algebra 2**

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation. x + y = 2 3x + 2y = 9
*August 16, 2012 by mel*

**Physics**

A rock dropped into a pond produces a wave that takes 14.6 s to reach the opposite shore,21.1 m away. The distance between consecutive crests of the wave is 5.3 m. What is the frequency of the wave?
*December 4, 2012 by Priscilla*

**Concavity-Calculus**

Determine the concavity for f(x)= 4/x^2-1 I took the second derivative and solved for zeros. I got x=-1 and x=1. However when plugged into the orig. equation this results in 4/0 (undefined). Does this mean there is no concavity?
*March 10, 2013 by Lisa*

**Human Resources Administration**

I need help understanding whether salaries are put into all categories of a program budget,line-item budget,and a functional budget matrix?
*September 27, 2013 by Holly*

**algebra**

A man tosses a penny up into the air above a 100 ft well with a velocity of 5 ft/sec. The penny leaves his hand at a height of 4 ft. How long will it take for the penny to reach the bottom of the well?
*November 25, 2013 by cole*

**physics**

A rock dropped into a pond produces a wave that takes 15.7 s to reach the opposite shore, 24.3 m away. The distance between consecutive crests of the wave is 3.5 m. What is the frequency of the wave?
*September 23, 2014 by Anonymous*

**math**

Suppose there is a 2 degree drop in the temp for every thousand feet that an airplane climbs into the sky if the temp on the ground, which is at sea level is 64 degrees What would be the temp
*October 3, 2014 by toy*

**math**

Given an exponential graph that are concave up and the points (1,4) and (-1, 16), give a possible formula of the function. I plugged the variables into the f(x)=b times a^x and got: 4= b times a^1 and 16=b times a^-1 I am not sure where to go from here.
*August 30, 2015 by Natalie*

**factorising**

how do you factorise? for example putting 2x² + x - 3 into the form (2x + 3)(x - 1) factorise 9x to the power of 4 - 64y to the power of 2
*October 4, 2006 by Abbs2*

**social studies**

How do each of the eight strands of social studies tie into the times and life of Christopher Columbus?
*October 27, 2008 by Katherine*

**music**

1. What were the beginnings of music in America that developed into jazz? 2. In which city did jazz take hold? Why?
*January 9, 2009 by Peter*

**Chemistry**

What mass (in grams)of mercury will fit into a 2 L bottle? M= DV V= 2L= 2,00o mL D= 13.6 g/ mL Mass= 27, 200 grams??
*April 7, 2010 by Amy*

**science**

what does the statement mean "the properties of salts are diferent from the properties of the elements that go into making them" mean
*November 10, 2010 by Anonymous*

**social studies**

What are three things that we import into our country and three things that we export?
*January 19, 2011 by steve*

**polymer science**

its possible to convert the commercial polymer into nano polymer and its affact any property of polymer
*February 16, 2011 by pradee*

**polymer science**

its possible to convert the commercial polymer into nano polymer and its affact any property of polymer
*February 16, 2011 by pradee*

**trigonometry**

convert the polar equation r^2=2cos^2theta + 3sin^2theta into a rectangular equation
*April 18, 2011 by casey*

**Physics**

A ball is thrown straight up into the air with a velocity of +20.5 m/s. Find the velocity of the ball after 2.5 s.
*June 19, 2011 by Leasha*

**Math**

Layla is sorting 18 spoons into stacks of 5.One stack is not complete.How many spoons are in that stack?
*September 27, 2011 by Victoria*

**math**

A piece of plywood is cut into strips 2 1/2 inches wide. How many strips of this width can be cut? HELP!!!
*November 3, 2011 by Linta*

**math**

if you have a piece of string 11 ft. long and you cut it into 15 equal pieces how long will each piece be?
*February 13, 2012 by Madison*

**chemistry**

If 75.0 grams of water is decomposed into hydrogen and oxygen, how many grams of oxygen should be formed?
*March 12, 2012 by Anonymous*

**chemistry**

If 75.0 grams of water is decomposed into hydrogen and oxygen, how many grams of hydrogen should be formed?
*March 12, 2012 by stoi.*

**Phsyics **

A cannonball is fired into the air with a speed of 42 m/s from a height of 28 m, with what speed does the cannonball hit the ground?
*April 16, 2012 by Kelly *

**math/linear **

4x + 5 = 2x + 19.. need to break down into coins and pouches. Need to know how many coins in each pouch.
*October 14, 2012 by karina*

**Math**

Solve for v 7x8x9xv=5040 I did 7x8=56, 56x9=504 Do u divide 5040 into 504
*November 13, 2012 by Gio *

**science**

In a dream you're in a car traveling at 50 km/h and you bump into another car traveling toward you at 48 km/h. The speed of impact is
*October 26, 2013 by josh*

**Algebra **

Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?
*March 19, 2014 by Anonymous*

**Algebra **

Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?
*March 19, 2014 by Anonymous*

**Math**

I need help with 12 over 25 times 10 over 14 times 7over 18 and then putting it into simplest form
*April 15, 2014 by Morgan*

**Algebra**

Sean divides 8 cups of granola into 1/4 cup servings. How many servings of granola does he have ?
*May 13, 2014 by Jenny 2*

**math**

9 pounds of coffe beans repackeage them into 3/8 pounds bags. how many bags cna he make?
*November 13, 2014 by lourane*

**math**

cylindrical tank of radius 4m and 7m high.if poured into the tank of 6m diameter .how high is the water?
*December 11, 2014 by chev*

**Math **

How do you write the square root of 3 in exponential form? or any other radical into exponential form
*July 10, 2015 by Amanda*

**math**

x to the power -7/2 into 2x to the power -1/2=?
*May 2, 2013 by tauranus*

**English**

Bobpursley, Ms Sue I urgently need you to check this paragraph. Thank you very much in advance!!! I made a change in the last sentence. 1) I spent my Easter holidays with my family at my grandparents' house in London. I had a very good time there, especially on the very last ...
*April 10, 2012 by Matthew*

**Math (combination/permutation)**

Question 1: There are 12 students in a class. Find the number of ways that 12 studenets can take 3 different tests if 4 students are to take each test. Question 2 Find the number of ways 12 students can be partitioned into 3 teams A, B, C, so that each team contain 4 students...
*December 30, 2010 by Cynthia*

**Math**

During an average lifetime, a person sheds about 40 pounds of dead skin. In the United States, life expectacy for men is about 73.6 years. Life expectancy for women is about 79.2 years. How many pounds would a man shed in a month and how many pounds would a women shed in a ...
*August 16, 2007 by Shirley*

**math, algebra II**

Can someone explain to me step by step how the book got to this answer i want to understand the steps....thanks Find the inverse, if it exists,for the matirx (*I used the underscore to separate the numbers within the matix) -2_1_3 3_-1_2 -4_2_0 the answer is: -4_6_5 -8_12_13 ...
*July 22, 2007 by student*

**Math/modelling**

Hi, I have a linear model with equation p =5.1t - 28, which concerns breeding pairs of birds where p is the number of breeding pairs and t is the year. I need to use this model to estimate the number of breeding pairs in year 15. I would assume to do this I just need to insert...
*July 13, 2010 by Tan*

**math**

the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????
*November 30, 2010 by Chris*

**math**

the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????
*November 30, 2010 by Chris*

**algebra**

2. The equation relates the radius r of a drainpipe in inches to the flow rate F of water passing through it in gallons per minute. a. Find the radius of a pipe that can carry 600 gallons of water per minute. Round to the nearest tenth. (Let ) b. Solve the following equation ...
*July 11, 2011 by stephanie*

**physics**

A spacecraft of mass is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius ( is the mean distance between the earth and the sun; it is about 150 million km). (a) What is the speed (in m/s) ...
*November 22, 2013 by juanpro*

**Algebra II**

Factor the Polynomial in quadratic form. 6y(to the sixth power) - 5y(to the third power) - 4 6y^6 - 5y^3 -4 = (2y^3 + 1)(3y^3- 4) I do not believe the cubic terms are separable into quadratic factors.
*January 11, 2007 by wendy*

**Math[PLease Check]**

Problem: 25-x^2 6 ------ * --- 12 5-x What I got: 5-x --- 2 *PLease Check My Work. No. Factor the 25-x^2 into two factors. Then the 5-x in the denominator divides out. So then is it: 5+x --- 2 yes. 12x12
*February 24, 2007 by Margie*

**Math**

In a bottling company, a machine can fill a 2-liter (L) bottle in 0.5 seconds and move the next bottle into place in 0.1 s. How many 2-l bottles can be filled by the machine in 2 h?
*January 28, 2009 by Dana*

**math**

In a bottling company, a machine can fill a 2-liter (L) bottle in 0.5 second (s) and move the next bottle into place in 0.1 s. How many 2-L bottles can be filled by the machine in 2 h?
*February 17, 2009 by nikki*

**Probabability**

You walk into a classroom containing 20 other people. What is the probability that at least one of the other people has the same birthday (month and day) as you?
*March 4, 2010 by Sue*

**science**

An irregularly shaped object has a mass of 67.5 If it is places into a graduated cylinder containing 50.0 ml water and the water level rises to 75.0 ml,what is the density of the object?
*July 1, 2010 by Anonymous*

**Algebra**

How would I find the coordinates of point A? If the diagonals of a parallelogram EFGH intersect at pointA. Would I take the coordinates of E and G and then put it into the equation: (x1+x2)/2 ,(y1+y2)/2 ?
*June 13, 2010 by Amy~*

**Geometry**

Four identical metal spheres, each with radius 6 cm, are melted and reshaped into one big sphere. Fine the radius of the new sphere.
*August 15, 2010 by Kyle*

**PHYSICS**

An athlete on a trampoline leaps straight up into the air with an initial speed of 9.3 m/s. Find the following: (b) the speed of the athlete when she is halfway up to her maximum height
*October 27, 2010 by Petrik*

**Physics**

An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves. i know period is just 1/freq. so what would i convert 80.9 MHz into???
*November 27, 2010 by Josh*

**Physics**

An FM radio station broadcasts at 80.9MHz. Determine the period of the radio waves. i know period is just 1/freq. so what would i convert 80.9 MHz into???
*November 27, 2010 by Josh*

**Science**

A ball is thrown vertically into the air and takes 5s to return to the thrower, from time of projection. What is the time it takes to reach maximum height ?
*January 31, 2011 by Christopher*

**Alegebra2**

1. Given f(x)=3^(x-2), simplify f(x+1)-f(x) into an expression of the form (a)(3^x) 2. Given the function f(x)=e^(x) ln x, write the equation(s) for any and all asymptotes. If the graph has no asymptotes, state that fact.
*February 13, 2011 by Arthur*

**Math(Please help)**

Write the equation of the tangent line for the curve y=x^3+3x-8 at point (2,6) Would I take the derivative of the equation and then plug in 2 and then plug everything into y-y1=m(x-x1)?
*April 29, 2011 by Hannah*

**chemistry**

Ammonia gas is passed into water ,yielding a solution of density 0.93 g/cm^3 and containing 18.6% NH3 by wieght .The mass of NH3 per cc of the solution is?
*July 6, 2011 by solution...*

**accounting**

Horton Company, as lessee, enters into a lease agreement on July 1, 2008, for equipment. The following data are relevant to the lease agreement:
*August 1, 2011 by sarah*

**Algebra**

a 260 m wire is cut into 3 pieces. The second is 4 times longer than the 1st. The third is 2 times longer than the 2nd how long is each piece=
*August 11, 2011 by jackie*

**math**

an electrician cuts a 29 foot piece of wire into two pieces. one piece is 4 feet longer than the other piece.how long is each piece?
*September 26, 2011 by hsanetha*

**french- affirmative commands**

When you are putting a verb into the tu form of an affirmative comand like don't eat any. Why is it N'en mange pas and not manges (the tu form of manger)
*January 11, 2012 by rebekah*

**Physics**

The springs of a 1100 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations?
*January 11, 2012 by Anonymous*