Tuesday

April 28, 2015

April 28, 2015

Number of results: 57,359

**Physics**

a small sphere whose m mass is 1.0 mg carries a charge q of 2.0*10^(-8)C. It hangs from a silk thread that makes an angle of 30 degrees with a large charged nonconducting sheet as in figure. Calculate the uniform charge density σ for the sheet
*February 22, 2012 by Jc*

**chemisty**

Find the volume of a starburst candy (220 cm cubed). The mass is 5.14 grams. Calculate it's density. How many starburst would it take to fill your locker (139,200 cm cubed)? Use dimensional analysis to solve this problem.
*September 8, 2013 by jj*

**physics**

two people are pushing a car of mass 2000kg. if they each push with a force of 320N at an angle of 15degrees to each side of the car, calculate the acceleration of the car, assuming no resistance... please help
*March 11, 2009 by cynthia*

**math grade 10 **

A cube has a volume of 1280 cubic feet. Determine the edge length of the cube as a radical in simplest form.
*September 26, 2012 by Slarlett*

**dressmakeing exam 04202100**

the most appropriate fabric for a pregnant women's only coat would be (a) black and ehite plaid (b) solid navy blue (c red and gray stripes (d) multicolored floral, when a dainty slip has along the top edge, the shoulder straps should be attached by (a) machine stitching along...
*April 19, 2012 by karen*

**physics**

A 67.0 g ice cube can slide without friction up and down a 26.0 degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12.0 cm . The spring constant is 20.0 N/m .When the ice cube is released, what distance will it travel up ...
*November 13, 2010 by Anonymous*

**Algebra. 1**

For a snow sculpture content, snow is packed into a cube-shaped box with an edge of 8 feet. The box is frozen and removed, leaving a cube of snow. One cubic foot of snow weighs about 30 pounds. You can estimate the weight ( in pounds) of the cube using the expression 30v where...
*August 23, 2007 by Michael*

**Chemistry**

This is probably easier then my making it but... Calculate the ph of a forming acid solution that contains 1.35% forming acid by mass. Assume a density of 1.01g/ml for the solution.
*February 24, 2012 by L.Bianchessi*

**Chemistry**

An aqueous antifreeze solution is 31.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.039 g/cm3. Calculate the molality of the ethylene glycol.
*March 14, 2013 by Maddie*

**chemistry**

4. A sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution has a density of 1.329 g/cm3 . Calculate a. The mass percentage b. The mole fraction c. The molality d. The molarity of H2SO4 in this solution
*February 5, 2015 by Steph*

**Math**

The density of ocean water at the surface is 1025 kg per meter cubed. Write an equation to calculate the mass of 12 meters cubed of ocean water
*October 6, 2014 by Frankie*

**Physics**

Two masses, mA = 40.0 kg and mB = 55.0 kg, are connected by a massless cord that passes over a pulley that is free to rotate about a fixed axis. This device is known as an Atwood’s Machine. The pulley is a solid cylinder of radius R = 0.360 m and mass of 7.50 kg. Note: The ...
*October 23, 2014 by Cheese*

**Chemistry**

At 20 degrees C ethanol has a density of 0.789 g/ml and H2O has a density of 1.0 g/ml. What is the % by volume of ethanol of a solution made by adding 50g of ethanol with 50g of H2O? Tutor Answer: Use density = mass x volume to convert 50 g ethanol to volume and to convert 50....
*November 29, 2011 by Shelly*

**math**

Five houses, next door to each other, are on the even side of the road. They are all three digit numbers and the largest is a perfect cube.The second lowest is a triangle number.
*March 3, 2014 by george*

**Chemistry**

Calculate the molarity and normality of a solution containing 9.8 g of H2SO4 on 250 cm cube of the solutiom
*June 29, 2012 by Shafket*

**physics**

50+kg+ice+cube+slides+without+friction+up+and+down+a+30°+slope.+The+ice+cube+is+pressed+against+a+spring+at+the+bottom+of+the+slope,+compressing+the+spring+10cm+.The+spring+constant+is+25Nm.+When+the+ice+cube+is+released,what+distance+will+it+travel+up+the+slope+before+...
*April 4, 2013 by zama *

**Chemistry**

An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol.
*January 21, 2011 by Sarah*

**math**

The density of a crystal is 2.65 grams per cubic centimeter. Ryan has a rectangular prism made of quartz. It measures 10 cm by 10 cm by 6 cm. Find the weight of this crystal in kilograms.
*April 6, 2011 by Dan*

**Chemistry**

Completion To calculate the percent composition of a known compound, start with chemical formula of the compound and calculate the ________ which gives the mass of one mole of the compound. formula mass. molecular mass.
*February 4, 2007 by Bryan*

**INTRODUCTION TO PHYSICS**

Question A mixture of alcohol and water has the density 750 kg m 3.calculate the ratio in the mixture of alcohol to water by i.mass ii.volume
*November 26, 2014 by "CRYING"HELP PLEASE!!!,THIS CAN SAVE A SMILE*

**Chemistry 2**

A United Nations toxicologist studying the properties of mustard gas, S(CH2CH2Cl)2, a blistering agent used in warfare, prepares a mixture of 0.675 M SCl2 and 0.973 M C2H4 and allows it to react at room temperature (20.0°C ). SCl2 (g) + 2 C2H4 (g) --> S(CH2CH2Cl)2 (g) At ...
*March 11, 2015 by Anonymous*

**Grade 8 Math**

How can you use the measures of the interior angles of regular polygons to show that a platonic solid cannot be made from regular polygons that have more than five sides?
*June 2, 2009 by Al*

**math **

The Kramer family room measures 23ft by 20ft. They are covering the floor with tiles that measure 1 ft on a side and cost $0.73 each? How much will they spend on the tile?
*February 12, 2013 by Carol *

**math**

calculate the area of a rectangle which measures 21m by 7m.
*May 3, 2014 by Anonymous*

**Chemistry Lab**

The experimental data you entered is: Trial #1 Trial #2 Trial #3 Mass: gelatin capsule (g) .123 .118 .122 Mass: whole alka-seltzer tablet (g) 3.230 3.230 3.230 Mass: capsule + alka-seltzer sample (g) .822 .882 .677 Mass: system before reaction (g) 23.109 23.110 22.735 Mass ...
*October 28, 2012 by Tyler*

**ap chem**

I'm supposed to find the mass of NaCl in 1 L & the mass of H20 in 1 L. I'm given NaCl solution. 1% by mass. The Density is 1.071 g/mL. I know the answer for NaCl is 10.71 g, but I don't know where to start to get to this. Could you lead me in the right direction?
*February 24, 2011 by dylan*

**physics**

A long thin rod lies along the x-axis from the origin to x=L, with L= 0.890 m. The mass per unit length, λ (in kg/m) varies according to the equation λ = λ0 (1+1.410x2). The value of λ0 is 0.700 kg/m and x is in meters. 1. Calculate the total mass of the ...
*February 12, 2014 by Naya*

**math**

A Jewlery box has length of 3 and a half, a width if 1 and a half, and a height of 2 units. What is the volume if the box I cubic units? Each of the cubes in this activity has a side length of 1/2. How many cubes with side length 1/2 does it take to form a unit cube? How many ...
*May 6, 2014 by Jess*

**math**

The scale balanced when n+20=80 Suppose the left side becomes n+3 How can I change the right side so that n+3=____ is equivalent to n+20=80 How can I change the right side to get an equivalent equation my choices are A. Add blank to the right side B. Divide the right side by ...
*January 12, 2015 by Hannah*

**Chemistry**

2. Calculate the volume for the following object If you know that the object has a mass of 24 grams and the density is 12 g/ml. I tried to get rid of the 24 by multiplying it on both sides, and dividing on both sides, but neither worked. What will then? Thanks!
*February 15, 2009 by Ben*

**science**

Given that 6.20 x 10^23 ethanol molecules have a mass of 46.04g calculate the number of ethanol molecules in a film of ethanol that is 3.08 mm by 0.0015 mm. Assume the density of ethanol is 0.790 g/mL please helppp
*August 28, 2012 by anonymous*

**math**

A sheet of cardboard measures 9 feet by 6 feet. Gina makes the entire sheet of cardboard into a closed box that is a perfect cube. What is the surface area of the box?
*January 24, 2013 by annette*

**math**

Please explain to me. A green sea turtle weights 355.3 kilograms. Which decimal is equivalent to this number? A. 3,550.3 B. 350.30 C. 355.03 D. 350.003
*December 16, 2012 by Loren*

**geometry**

find the measures of each side of triangle abc with vertices a(-1,5), b(6,1), c(2,6) and classify the triangle.
*February 19, 2011 by Tori*

**Geometry**

You are presented with a right triangle. The dimension of side a is 2 inches and the dimension of side b is 4 inches. Calculate the dimension of side c. I believe it would be 4.5 inches
*October 4, 2008 by Jen*

**geometry**

Each side of a equilateral triangle measures 12 cm. Find the height, h of the triangle.
*October 15, 2012 by Louise*

**Maths**

Question A mixture of alcohol and water has the density 750 kg m 3.calculate the ratio in the mixture of alcohol to water by i.mass ii.volume
*November 25, 2014 by Alozie benjamin*

**mathematics**

what is the slantheight of the largest square pyramid that can be curved out from a wooden cube of side 12cm?find the lateral surface area of the pyramid so obtained?
*October 6, 2012 by asha*

**gen physics**

An iron (ƒâ = 7860 kg/m3) cube measuring 15.4 cm on a side is suspended from a wire. Find the tension in the wire when the block is completely submerged in water (ƒâ = 1000 kg/m3).
*July 16, 2013 by hank*

**Chem**

If the molar mass of monatomic deuterium (D) is 2.0141 g, then what is the density of diatomic deuterium (D2) gas at 25.0°C and 1.00 atm? I know the equation for density is: d=m/v What equation(s) do I need to use to solve this?
*April 19, 2008 by Ginger*

**physics**

A block of mass 200g and density 0.8g/cm3 is submerged in a liquid of density 0.2g/cm3. find minimum force required to keep the block floating.
*February 11, 2012 by Narayanan*

**math**

A square shaped park measures 3/5 mile long on each side. What is the area of the park?
*November 8, 2010 by marty Martinez*

**math**

If a cardboard box measures 1 1/2 feet on each side what expression will represent the volume of the box
*November 10, 2010 by Ashley*

**math**

which has the greater area: a square with a side that measures 7 meters, or a 6-by-8 meter rectangle? what is the area?
*January 13, 2011 by tracy*

**milimeters question**

A box measures 24mm on a side. What is the volume of the box ? Help me with steps please?
*May 1, 2013 by Michael*

**pre algebra**

a fieldstone patio is in the shape of a square that measures 9 ft on each side what is the area of the patio
*June 23, 2013 by alonzo *

**Physic**

The density of gold is 19.3 g/ml. If the statue is solid gold, how much does it weight?
*August 16, 2014 by Asma*

**math/chemisty**

Find the volume of a starburst candy (220 cm cubed). The mass is 5.14 grams. Calculate it's density. How many starburst would it take to fill your locker (139,200 cm cubed)? Use dimensional analysis to solve this problem.
*September 8, 2013 by jj*

**Science**

A 400 kg. wooden log is floating with 0.2 of its volume above water level. Given that the density of iron is 7.8 gram per centimeter cubic, calculate the least mass of iron object attached to the underside of log that will sink it.
*October 25, 2013 by Uddeshya*

**chemistry**

A student breaks a thermometer and spills most of the mercury (Hg) onto the floor of a laboratory that measures 15.2 m long, 6.6 m wide, and 2.4 m high. (a) Calculate the mass of mercury vapor (in grams) in the room at 20 degrees celcius. The vapor pressure of mercury at 20 ...
*September 21, 2011 by Amber*

**Chemistry**

The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W? As a solid, W adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of W? What is the volume of a unit cell of this metal? What is the edge length...
*January 18, 2013 by Anonymous*

**Forensic Psychology**

Using multiple sources, defend your thesis on how and why therapeutic and forensic roles can or cannot be reconciled. Ensure that you argue for a particular side of the issue (not arguing both sides) and that your argument is well-supported by scholarly literature, ...
*October 31, 2013 by debra*

**Chemistry **

What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?
*February 2, 2015 by Samantha*

**Chemistry**

Phase diagrams- Explain how the density of the solid and liquid phase would compare.
*January 16, 2008 by Lauren*

**Chemistry**

An element has hcp packing with a hexagonal unit cell. Its density is 4.5 g/cm3 and the unit cell volume is 3.53 x 10-23 mL. Calculate the molar mass (g/mol) of the element to three significant figures.
*May 13, 2009 by Linda*

**chemistry**

An element has hcp packing with a hexagonal unit cell. Its density is 21000 kg/m3 and the unit cell volume is 2.94 x 10-23 mL. Calculate the molar mass (g/mol) of the element to three significant figures.
*February 9, 2010 by Luc*

**chemistry 1046**

A.Determine the pH of the solution. a solution that is 1.17% HCl by mass (Assume a density of 1.01 g/mL for the solution.) B. Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 279 mg/L.
*July 3, 2012 by Anonymous*

**chemistry**

an aluminum cylinder is 10.0 cm in length and has a radius of .25 cm. if the mass of a single atom of aluminum is 4.48X10^-23 calculate the number of aluminum atoms present in the cylinder. the density of aluminum is 2.70 g/cm^3 Please answer quickly.
*September 7, 2012 by Krista*

**college chem**

metallic iron crystallizes in a cubic lattice. The unit cell edge length is 287 pm. The density of iron is 7.87 g/cm^3. Calculate the mass (in grams) of one unit cell
*February 4, 2013 by luis fernandez*

**Science**

A stone with a mass of 225.0g is placed into a graduated cylinder with a starting volume of 200.0ml. If the water in the cylinder is displaced to 225.0 ml, calculate the volume of the rock and its density.
*October 8, 2013 by Bianca*

**Physics**

M, a solid cylinder (M=2.35 kg, R=0.111 m) pivots on a thin, fixed, frictionless bearing. A string wrapped around the cylinder pulls downward with a force F which equals the weight of a 0.750 kg mass, i.e., F = 7.357 N. 1)Calculate the angular acceleration of the cylinder. The...
*February 11, 2014 by Tomas*

**science**

A light spring is initially used to suspend masses from the ceiling. When a 4.0 kg mass is attached to the spring, its length is 22.0 cm. When an additional 2.3 kg mass is attached to the bottom of the 4.0 kg mass, the spring's length measures 26.8 cm. Determine the spring's ...
*April 12, 2015 by hloni*

**algebra**

27a squared b cube - 36a cube b squared + 18 a squared b squared + 9 a to the 4th b cube
*August 22, 2011 by Anonymous*

**chemistry**

What is the mass/vol % ethanol in an ethanol-water solution with density of 0.875 g/ml and containing 65.0% ethanol by volume? The density of pure ethanol is 0.789 g/ml.
*June 27, 2010 by jimbo*

**physics**

a block off wood (density = 0.5 g/cm^3) is floating in oil (density = 0.75 g/cm^3). The mass of the wood is 1500 g. Determine the volume of the oil displaced
*December 2, 2011 by steph*

**Chemistry/physics**

i have a density of 1.9x 10 (negative cubed)g/cm cubed.and i have a mass of 50.0 g. do i need to convert my density in order to find my volume?
*February 20, 2013 by Armoured sheperd*

**CHEM**

Calculate the density of oxygen, , under each of the following conditions: STP 1.00atm and 25.0 degrees celsius Express your answers numerically in grams per liter. Enter the density at STP first and separate your answers by a comma.
*October 24, 2008 by Kara*

**density and density error (check calculations)**

Calculate the density of earth and its density error d=m/v where m = 6.00*10^24kg and v = (4/3)(pi)(6359000)^3 = 1.07709...*10^21 m^3 therefore d=6.00*10^24/1.07709...*10^21 m^3 d = 5570.5254...kg/m^3 using the sig fig rule, in division and multiplication take the least ...
*January 24, 2011 by Farah*

**Maths 132**

Find the volume of the solid lying in side both the sphere bounded x^2+y^2+z^2=4a^2 and the cylinder x^2+y^2=2ay
*June 25, 2011 by Bir*

**physics**

The volume of a neutron is about 10−45 cubic meters. Suppose you packed the number of neutrons you found for problem 4 into a cube so that the neutrons touched edge to edge. How big would the cube be? (Hint: Problem 4 states that a neutron star has a mass of 3.4×1030 kg ...
*November 27, 2011 by Anonymous*

**Cemistry**

A solution is 36% silver nitrate (AgNO3) by mass. The density of this solution is 1.44 g/mL. The formula weight of AgNO3 is 170 g/mol. Calculate the molality of AgNO3 in this solution.
*June 9, 2010 by Swagato*

**geometry**

The diameter and height of this cylinder are equal to the side length, S, of the cube in which the cylinder is inscribed. What is the expression for the cylinder's volume?
*March 2, 2015 by Mary*

**math/algebra**

I have a triangle one side = 3 side 2 = square root5 - square root 3 side 3 = square root 5 + square root 3 I can get the answer 3 and I know I am missing the square root part of the equation can you help me by showing how this problem is worked so I can see where I am missing...
*July 22, 2007 by Dee*

**Chemistry**

A 2.28 m solution of the solute formic acid dissolved in the solvent H2O is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 12.40 mol of formic acid. Correct Answer = 6.01 Molar Mass (g/mol): HCO2H 46.03 H2O 18.015 Density ( g/mL ): HCO2H 1....
*June 6, 2010 by Fred*

**geometry**

a pyramid has a square base that measures 3 feet on each side. the height of the pyramid is 19 inches. what is the volume?
*September 27, 2010 by margo*

**Geometry**

Tell if the measures 9,11, and 7 can be side lengths of a triangle. if so, classify the triangle as acute, right, or obtuse?
*July 21, 2011 by Lydia*

**Geometry**

What is the volume of a regular pyramid if it has a square base, one side of the base measures 4 cm, and the altitude is 5 cm?
*July 31, 2011 by Brianna*

**math**

mark wants to enlarge a 4" by 6" photograph so that the longest side measures 15" how wide will he need to make the photograph
*May 9, 2012 by american fork jr*

**geometry**

A regular pentagonal pyramid has a side length of 4 mm, an apothem that measures 3 mm, and a height of 4.1 mm. What is the volume of the pyramid?
*November 2, 2012 by Jade*

**physics lab**

For a physics lab, I measured length, width, thickness, and mass of 2 blocks of wood, 3 trials each. There were 2 questions on the lab that I did not understand how to do. 1. For each trial, find the ratio between the mass and the volume. Based on your data, what is the ...
*September 1, 2006 by anonymous*

**MaTh**

A square game board measures 16 inches on each side. The game board is divided into smaller squares measuring 2 inches on a side. How many small squares are there on the game board? My answer is 16x16 = 256 x 2=512, then I 16/2 = 8 and 512/8 = 64. Is this correct if so is ...
*August 8, 2013 by Amy*

**Science **

A student mixed two clear liquids together in a beaker and a solid precipitate formed. His data is shown in the table below. Liquid reactant A = 10 g Liquid reactant B = 17 g Beaker + solid product= 32 g What is the mass of the beaker? A. 5 g B. 10 g C. 15 g D. 17 g E. 32 g Is...
*November 6, 2014 by Callie*

**Science HELP**

A student mixed two clear liquids together in a beaker and a solid precipitate formed. His data is shown in the table below. Liquid reactant A = 10 g Liquid reactant B = 17 g Beaker + solid product= 32 g What is the mass of the beaker? A. 5 g B. 10 g C. 15 g D. 17 g E. 32 g Is...
*November 6, 2014 by Callie*

**chemistry**

NH4NO3(s) NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction above, 1.07 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid dissolves) is 22.4°C. ...
*November 16, 2012 by DeeDee*

**Math**

Mr Shen wished to enter the orange kite competition with an innovative kite of his own design. He did tests that showed an irregular quadrilateral design was best. The longest side (A) was twice the length of the shortest side (C). Side B was one and one-half times the ...
*May 5, 2014 by Christopher*

**physics**

What is the density of a solid 1.5 kg paperweight that gets submerged in water and displaces 150 cm3 of water
*May 8, 2010 by Jessica *

**science**

a solid weighs 100g in air 75 g in water and 70 g in oil.find relative density of oil
*March 11, 2015 by mk*

**physics**

One mole of titanium (6 1023 atoms) has a mass of 48 grams, and its density is 4.54 grams per cubic centimeter, so the center-to-center distance between atoms is 2.60 10-10 m. You have a long thin bar of titanium, 2.4 m long, with a square cross section, 0.11 cm on a side. You...
*June 26, 2014 by hannah*

**Chemistry**

Calculate the density of sulfur trioxide gas at 35 degrees celsius and 715 torr pressure. I know that d=m/v = PM/RT. Im not sure how to set this up. I know the molar mass of sulfur trioxide is 80.0642 but im not sure if I need to use that.
*January 11, 2012 by Hannah*

**chemistry**

Assume the density of aqueous HCl is the same as water (1.0 g/mL) and use the densities of ethanol (0.789 g/mL) and water as well as the actual amount of recrystallization solvent used to calculate the mass of recrystallization solvent.
*February 12, 2012 by Mike*

**physics**

The Moon can be considered to be a sphere with uniform density with mass MM and radius RM. At the (exact) center of the Moon, the gravitational force on a mass m due to the mass of the Moon is? I know the answer is zero but want to know why using gauss' law
*July 9, 2012 by lanre*

**chemistry**

The density of a 60% (m/m) ethanol solution 0.8937g/ml , calculate the molarity of the solution , step by step . Molar mass of ethanol = 46.07
*July 29, 2013 by kaksha*

**Chemistry**

I have a solution made up of 100 ml of distilled water and 2.0g of NaOH. I need to determine the total volumeof the solution in order to the calculate the mass of the reaction mixture. How do I do this? We are to assume the density of the solution is the same as pure water, 1....
*April 28, 2010 by Jim*

**chem**

As little as 1.oomg of Arsenic in 1-L of water can kill you. Calculate the following. Assume the density of the solution is 1.00g/cc. a.) How many moles of arsenic in 1 mg? b.) What is the mass percent of the solution? c.) What is the concentration in ppm and ppb? d.) What is ...
*December 8, 2012 by Tricia*

**INTRO TO PHYSICS**

Each of the following objects has a radius of 0.174 m and a mass of 2.16 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 37.3 rad/s. Find the magnitude of the angular momentum of each object. >Hoop of thin cylindrical ...
*October 31, 2012 by Sandy*

**Chemistry**

Calculate the enthalpy change for the melting of a 30 g ice cube. Show all your steps. Any help is appreciated! :)
*November 10, 2008 by anonymous*

**chemistry**

calculate the volume of Nitrogen gas to produce 5.6 dm cube of nitric oxide at STP ,N2 + O2 = 2NO
*February 20, 2013 by rupal*

**Algebra**

A large cube is formed by using many small 1"x1"x1" cubes. Once the large cube is formed, all the outside faces are painted. There are now exactly 27 small cubes that do NOT have any paint on any face. How many 1"x1"x1" cubes were used to form the large cube?
*February 25, 2013 by Kevin*

**Chemistry**

I know how to find a and b on this problem but how do I find c? Really would appreciate the help, thanks! The formula of a compound of iron and sulfur was determined using the method of mass measurements. A sample of iron was weighed into a crucible and covered with finely ...
*February 21, 2010 by Jenny*

**Last Question Plz helppp:((im soo sleepy!!:(**

1)The reaction between solid sodium and iron(III) oxide, Fe2O3(s), is one in a series of reactions that occurs when an automobile air bag inflates. 6Na(s) + Fe2O3(s) -> 3Na2o(s) + 2Fe(s) If 100.0 g of iron(III) oxide are used in this reaction, what mass of solid iron will ...
*December 19, 2012 by Nikki*