Tuesday

February 9, 2016
Number of results: 61,717

**math**

each set of probabilities is associated with a rolling cube. What numbers are marked on the faces of each cube? P(2)=1/3 P(4)=1/3 P(6)=1/3
*March 23, 2012 by Max*

**math**

a cube is 5x5x5. How many smaller cubes in the larger cube. So I just mult. to get 125?
*April 7, 2013 by jeanna*

**Physics**

Determine the initial acceleration of a 1 kg solid aluminum chunk (density = 2,700 kg/m3) released from rest by a diver 10 m under the ocean.
*December 10, 2010 by Sam*

**chemistry**

Classify each of the follwing by the type of solid(molecular, ionic, metallic, covalent network)it will form: a) Na b) Fe c) SiO2 d) H2O E) KF The result that I got are : a) Na (molecular solid) b) Fe (metalic solid) c) SiO2 (ionic solid) d) H2O (ionoc solid) E) KF (covalent ...
*June 11, 2007 by Tom*

**Physics(Please help, thanks)**

An experiment was done where a tiny steel ball was measured with a micrometer. I know I already posted a question about this before and was given a respond but after trying to fix my answers I am still lost. If someone could please review my results and tell me where I went ...
*September 2, 2012 by Hannah*

**physics**

A rectangular block of ice 10 m on each side and 1.1 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. a) How high does the top of the ice block float above the water level? m * .116 OK HELP: Use Archimedes' Priciple. b) ...
*November 7, 2010 by Sarah*

**chemistry**

the force holding together an ironic solid are much stronger thantheforces between particles in a molecular solid. how are these strong forces reflected in the properties of an ionic solid?
*April 12, 2011 by jules*

**calculus**

The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
*April 16, 2015 by Anonymous*

**Geometry**

A square measures 8 inches on each side. What is its area rounded off to the nearest whole number. (Note: 1 inch ≈ 2.54 cm)
*January 16, 2011 by Ivan*

**Math**

A store's sign is the shape of an equilateral triangle. One side measures 21 inches. What is the length of each of the other two sides?
*November 14, 2011 by Sarah*

**math**

I have a pizza that measures 36 by 21 that needs to cut into equal pieces with no left overs. What is the length of longest side?
*December 16, 2013 by mari*

**Geometry**

#19. Given a regular octagon, find the measures of the angles formed by (a) two consecutive radii and (b) a radius and a side of the polygon.
*April 8, 2014 by Heather*

**Calculus**

Let f and g be the functions given by f(x)=1+sin(2x) and g(x)=e^(x/2). Let R be the shaded region in the first quadrant enclosed by the graphs of f and g. A. The region R is the base of a solid. For this solid, the cross sections, perpendicular to the spx-axis, are rectangles ...
*April 19, 2015 by Anonymous*

**Chemistry**

In the experiment shown below, you add some salt to water. A = All of the solid dissolves (no solid at the bottom). B = You add more water and the solid stays dissolved. Select all of the following that are true about solutions A and B. The same number of ions are dissolved in...
*November 10, 2011 by Rachel*

**Chemistry 1002**

Over a period of time, the concentration of sulfuric acid in a lead storage battery of an automobile has decreased from 38 percent by mass(density=1.29 g/mL) to 26 percent by mass(1.19 g/mL). Assume the volume of the acid remains constant at 715 mL. a)Calculate the total ...
*April 19, 2015 by Jen*

**Chemistry**

I need help I do not know how to set up this problem. Calculate the energy to heat three cubes gold aluminum and silver from 15 Celsius to 25 degrees Celsius. Density gold:0.129 J/g degrees C Density aluminum: .896 J/g degrees C Density silver: .235 J/g degrees C
*September 23, 2015 by Amber*

**physical science**

What is the mass of a 10.0 cm3 cube of copper?
*January 22, 2011 by joe*

**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 11, 2014 by Molly*

**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 11, 2014 by Molly*

**Physics **

A long thin rod lies along the x-axis from the origin to x=L, with L= 0.750 m. The mass per unit length, λ (in kg/m) varies according to the equation λ = λ0 (1+1.410x3). The value of λ0 is 0.600 kg/m and x is in meters. 1) Calculate the total mass of the ...
*January 9, 2016 by David*

**ap physics c**

Hi What is the center of mass of the following object measured from the center of the sphere?: a sphere of radius R and mass m2 is connected to a solid tube of mass m1 and length L Thank you!
*November 23, 2010 by student2010*

**Math**

each face of a cube can be painted either yellow or red. how many different ways can you paint the cube?
*April 26, 2010 by Carol*

**physics**

If a steel cube is placed on a surface that is increasing in slope. At what angle will the cube start to move
*December 17, 2015 by jake*

**Math**

If a cube has one edge of 2m, what is the surface area of this cube?
*January 17, 2011 by dave*

**MATH**

A cube has a length of 12 cm, a width of 15 cm, and a height of 11 cm. What is the volume of the cube?
*April 20, 2011 by Matonic*

**math**

If the surface area of a cube is 150e2 what is the volume of the cube?
*August 6, 2012 by Grace*

**Maths**

If the length of a cube is 4.6cm what will be the breadth and the height of the cube
*August 26, 2013 by Sinesipho *

**Maths**

A cube has a volume of 64 cubic units.what are dimensions of the cube?
*February 4, 2014 by Anonymous*

**math**

a cube's length width and hight are 4 1/4 each. what is the volume of the cube?
*May 20, 2015 by seahawks*

**Math**

If the volume of the cube is 512cmsquared, what is the surface area of the cube?
*January 12, 2016 by Anonymous*

**Chemistry AP-Density**

The density of osmium is 22.57g/cm3. If a 1.00kg rectangular block of osmium has two dimensions of 4.00cmx4.00cm, calculate the third dimension of the block.
*August 17, 2010 by Victoria*

**Physics HELLLPPPP**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
*January 25, 2013 by NATTT*

**PLZ Check my Science Project's summary?!**

The following r the instructions to my Project: - Compose a scientific summary of your method, observations, data, and conclusions. In addition, be sure to answer the questions below in your report. 1. Why does the first method for determining volume work only for a regular-...
*January 4, 2016 by Natasha*

**Physics**

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the ...
*October 26, 2014 by Anonymous*

**Physics**

2. A magnetic levitation or maglev train rides rails without touching them. Explain how this works using your data. Distance from surface (cm) Number of lines/0.5 cm Average number of lines/0.5 cm Field density (number of lines/cm) Side 1 Side 2 0.5 6 6 12 12 1.0 10 10 20 10 1...
*May 30, 2012 by Vita*

**Physics**

2. A magnetic levitation or maglev train rides rails without touching them. Explain how this works using your data. Distance from surface (cm) Number of lines/0.5 cm Average number of lines/0.5 cm Field density (number of lines/cm) Side 1 Side 2 0.5 6 6 12 12 1.0 10 10 20 10 1...
*May 30, 2012 by Vita*

**Geometry plz help**

A rectangular solid has a top face with surface area of 28 ft, a front face with surface area of 20 ft, and a side face with surface area of 70 ft. What is the volume of this solid?
*November 29, 2009 by Ryan*

**Physics(Please check)**

An experiment was done where a tiny steel ball was measured with a micrometer. I know I already posted a question about this before and was given a respond but after trying to fix my answers I am still lost. If someone could please review my results and tell me where I went ...
*September 3, 2012 by Hannah*

**Chem**

mass of empty cylinder is 87.470g 97.470g w/10mL of water 107.470g + 10mL of water 117.470g + 10 more mL of water need to know the total volume of water (in mL or cm3) total mass of water density of water calculate the average of the 3 densities of water.
*June 19, 2010 by dra*

**Chemistry**

Calculate the mass ( kg ) of the solute C4H8O and the volume ( mL ) of the solvent C6H6 that should be combined to generate 6450 g of a solution that is 2.07 m C4H8O. Density (kg/l) C4H8O 0.8892 C6H6 0.8786
*February 1, 2010 by Anon*

**AP Chemistry**

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
*November 14, 2010 by Anonymous*

**chemistry**

A KNO3 solution is made using 88.4g of KNO3 and diluting to a total soultion volume of 1.50l. Calculate the molarity and mass percent of the solution. Assume a density of 1.05 g/mL for the solution.
*November 6, 2011 by Monique*

**chemistry**

assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.11mm
*May 4, 2012 by Karon*

**Chemistry**

A bottle of wine contains 11.4% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
*September 23, 2012 by Erin*

**chemistry**

Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.30mm .
*February 9, 2014 by Anonymous*

**Chemistry**

CaCO3(s) <--> CaO(s) + CO2 (g) A 5.9-gram sample of CaCO3 (molar mass = 100.) is placed in an evacuated 2.00L container and heated to 200^oC. Equilibrium is reached when 5.15% of the CaCO3 has decomposed. 1)Write the Kp expression for this reaction and calculate its ...
*March 3, 2011 by Patrick*

**phys102**

a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity
*August 14, 2010 by kabelo*

**Physics - please help!!..**

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 Molly*

**math**

Delta airline flights seats 340 people. An average of 5% of the people with reservations doesnt show up, so they overbook by 350. This system can be analyzed by using binomial distribution. n=350 and p=0.95 1) Find the probablity that 350 reservations there are more passangers...
*April 6, 2008 by mel*

**Calc 3**

The actual span of the base of the dome is 143 feet. 1) Use cylindrical coordinates to write the surface of the dome as a function of the distance from the center of the base; that is find z = f (r) . 2) Use your function to find the height of the dome; that is what is f (0...
*December 7, 2009 by joe*

**Physics**

A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
*June 29, 2012 by Tracy*

**Physics**

A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
*June 29, 2012 by Tracy*

**Physics**

A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...
*June 29, 2012 by angela*

**Physics**

1). A hot iron horseshoe (mass=.40kg), just forged, is dropped into 1.35L of water in a .30kg iron pot initially at 20.0 degrees Celsius. If the final equilibrium temperature is 25.0 degrees Celsius, estimate the initial temperature of the hot horseshoe. 2). A cube of ice is ...
*April 21, 2011 by Emily G.*

**chemistry**

mass of crucible- 18.50g mass of crucible+hydrate- 19.50g mass of crucible+anhydrous salt 1st heating- 19.10g mass of crucible+anhydrous salt 2nd heating- 19.10g Questions: 1. calculate mass of water lost from your sample 2. calculate % of water in sample CuSO4*5H2O 3. ...
*May 29, 2012 by Amanda*

**science chemistory**

CaCO3 2HCl forms CO2 CaCl2 H2O 1.calculate the molar mass of calcium chloride produce 2.calculate the number of moles of calcium carbonate 3.calculate the mass of calcium carbonate
*June 14, 2015 by kem*

**Pyhsics **

The weight of the atmosphere above 1 m2{\rm m}^{2} of Earth's surface is about 100,000 N{\rm N}. Density, of course, becomes less with altitude. But suppose the density of air were a constant 1.2 kg/m3{\rm kg}/{\rm m}^{3}. Calculate where the top of the atmosphere would be. ...
*April 10, 2014 by Kimmie *

**Algebra**

Jim is installing ceramic tile behind his kitchen sink. Each tile is a square with side length 4 1/4 inches. For each tile, he allows an additional 1/8 inch per side for the grout between tiles. How many tiles should he buy if the space measures 2.1 square feet? What is the ...
*October 24, 2007 by moo*

**Geometry**

What scale factor is needed for a similarity transformation to transform a cube into a cube with twice the volume?
*September 30, 2011 by Mik*

**physics**

A 0.25 kg cube of iron is heated and its temperature rises from 23.0 C to 45.0 C. How much heat entered the cube in Joules and in Calories?
*January 26, 2012 by joe*

**Math **

A cube has a surface area of 24 ft2. What is the length of one edge of the cube? Show Work Please.
*June 1, 2014 by Carl*

**physics**

You have a mass m hanging on a string of length L. You pull the mass to one side so that the string makes an angle theta with the vertical, then you let go of the mass. For the instant after you let go, how do you calculate the tension in the string? I came up with the ...
*April 7, 2009 by kayla*

**chemistry**

The ionic radii of Na+ (atomic weight 22.99) and Cl- (atomic weight 35.45) are 1.0 and 1.8 Angstrom, respectively. Treating the ions as hard spheres, calculate the density of NaCl. Compare this with the measured density of 2.17 g/cm3.
*September 13, 2014 by john*

**chemistry**

Titanium is used in airplane bodies because it is strong and light. It has a density of 4.55 g/cm^3. If a cylinder of titanium is 7.75 cm long and has a mass of 153.2 g, calculate the diameter of the cylinder. (V=pi*r^2*h, where V is the volume of the cylinder, r is the radius...
*January 17, 2011 by Maria*

**science**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015 by Kyle *

**science**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015 by Kyle *

**Physics need help**

Carbon monoxide is a gas at 0 degree Celsius and a pressure of 1.51x10^5 Pa. It is a diatomic gas, each of its molecules consisting of one carbon atom (atomic mass = 12.o u) and one oxygen atom (atomic mass = 16.0 u). Assuming that carbon monoxide is an ideal gas, calculate ...
*October 27, 2014 by Kristian *

**Physics (**

3. Terminal velocity of an object in freefall is given by Vt = root 2gMA/Cdñ , where g is gravitational acceleration,Cd is the coefficient of drag, p is air density, and MA is the ratio M/A of mass M to ‘downwards facing’ area A. For a falling sphere of radius r, we calculate ...
*January 28, 2016 by Sarah*

**math**

Peter is interested in designing an experiment to test the probability of tossing a certain number on a fair cube. He will toss one cube 10 times in a row and count how many times the cube lands on the number 4. What is one aspect of this experiment he can change to make the ...
*December 10, 2010 by Anonymous*

**chemistry**

calculate the moles of solute present in 1.25 centimeter cube of 0.5 M h3po4 solution
*June 19, 2014 by hifsa*

**Science -Density**

gold has a density of 19.30 g/cm3 . What si the mass of a bar of gold 15 cm x5 cm x 8 cm
*October 22, 2014 by Jess*

**SCIENCE**

The size, mass, and arrangement of atoms affect the density of a substance. If a substance has a low density, what can you guess about the size, mass and arrangement of the atoms that make up that substance?
*July 16, 2013 by Amy*

**Physics**

Three blocks of masses 1.0, 2.0, and 4.0 kilograms are connected by massless strings, one of which passes over a frictionless pulley of negligible mass, as shown above. Calculate each of the following. a. The acceleration of the 4 kilogram block b. The tension in the string ...
*February 28, 2010 by Kate*

**Physics**

what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
*December 4, 2009 by Doly V*

**physics**

A hollow steel buoy in thee form of a sphere of radius 0.5m is fixed by a wire to the base of a river. If the mass of the buoy is 20kg, calculate the tension in the cable. (Take density of water=1000 kilograms per cubic meter).
*August 15, 2013 by Hilder*

**Chemistry**

A 1" x 1" 1/8" copper ingot has a density of 8.94 g/mL. 25 pellets were obtained from the ingot. Explain what would be the density of each pellet. I went ahead and found the mass of the ingot which is 1.1175g but I'm still stumped on what to do from there.
*February 1, 2016 by Joe*

**Chemistry**

how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in volume of 250ml. given, Formula: H3PO4 Melting point: 42.35 °C Density: 1.88 g/cm³ Molar mass: 98 g/mol
*January 29, 2013 by Merlina*

**Physics**

I have performed an experiment of simple harmonic motion and the values I got Mass(g)Distance (m) 200 0.438 250 0.398 300 0.345 350 0.312 400 0.297 450 0.281 500 0.259 I would like to know how to calculate the spring constant... since I have been having weird values, if ...
*February 8, 2011 by Abi*

**Physics**

A speaker which produces a frequency of 312 Hz is moving away from an observer and towards a wall at 3 m/s when it is 30 degrees Celsius. What is the frequency of the sound that travels directly to the observer? What is the frequency of the sound that bounces off the wall and ...
*February 3, 2009 by Doppler*

**physics**

1 The specific heat of a substance at its boiling point or melting point Is 0 Is infinity Is negative lies between 0 and 1 2 A unit mass of solid converted to liquid at its melting point. Heat is required for this process is Specific heat Latent heat of vaporization Latent ...
*April 12, 2015 by promise*

**physics**

1 The specific heat of a substance at its boiling point or melting point Is 0 Is infinity Is negative lies between 0 and 1 2 A unit mass of solid converted to liquid at its melting point. Heat is required for this process is Specific heat Latent heat of vaporization Latent ...
*April 17, 2015 by solomon*

**physics**

A block of unknown mass is attached to a spring with a spring constant of 6.00 N/m and undergoes simple harmonic motion with an amplitude of 12.0 cm. When the block is halfway between its equilibrium position and the end point, its speed is measured to be 33.0 cm/s a)Calculate...
*April 27, 2009 by Jessi*

**Physics**

a rectangular box of negligible mass measures 5m long,1m wide and 0.5m high. How many kilograms of mass can be loaded into the box before it will sink in a freshwater lake?
*January 6, 2015 by Lee*

**physics 2a**

from solid sphere, solid cylinder and thin-walled cylinder.All three start from the same position and they all have the same kinetic energy a) which oblect will go the farthest b) does the result depend on the mass, radius of the object
*November 10, 2010 by poisson*

**ET3034TUx Solar Energy**

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the ...
*October 16, 2013 by Anon*

**Solar Energy Help ASAP**

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the ...
*October 17, 2013 by Anonymous*

**physics**

Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known spot in the Earth's oceans, at 10.922 km below sea level. Taking density of seawater at atmospheric pressure (p0 = 101.3 kPa) to be 1024 kg/m3 and its bulk modulus to be B(p) = B0 + 6.67(p −...
*April 16, 2011 by HELP!!!!*

**geometry**

How would you figure this question out? :The measures of two sides of a triangle are 8 and 11. Use an inequality to express the range of the third side, m.
*October 24, 2010 by jordan*

**9th grade Math**

A rectangular floor that measures 3 m by 2 m is covered by 384 square tiles. Determine side length of each tile in centimeters Thanks!
*October 25, 2010 by Chris*

**Geometry**

one of the ancient store pyramids in egypt has a square base that measures 145m on each side. the height is 108m. What is the volume of the pyramid?
*May 30, 2011 by Anonymous*

**Geometry**

for each parallelogram find the measures of the angles formed by extending two adjacent side through their common vertex: angle is 90 degrees
*December 1, 2013 by Jenna*

**math **

A photo measures 10cm by 8cm. if you wish to increase each picture of the side uniformly by such that the area increased by 75%, what will the new dimensions be
*November 12, 2015 by Francesco *

**Physics**

A charge q=3*10^-6coulumb is placed at the centre of a cube of edge L.Determine the electric flux through each of the cube faces.
*April 8, 2010 by Ayodele*

**Physics**

A bicycle and rider of total weight 815 N travel at a speed of 40.0 km/h. The rider hits the breaks and the bicycle slides to a full stop in a distance of 8.5 m. Ignore air resistance and use g=9.8 m/s2. What is the coefficient of kinetic friction between the tires (rubber) ...
*October 22, 2009 by Nikita*

**Science**

Please help !!! A student wanted to determine the density of an object made of an unknown substance. She found the mass of the object was 335g. Then she did water displacement to determine the objects volume. The initial volume of the water was 50.0 mL. With the object ...
*October 27, 2013 by Cherie*

**Chemistry**

Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems but the answer is ...
*June 12, 2013 by xavier*

**chemistry**

A sulfuric acid solution containing 571.6g of H2SO4 per of solution has a density of 1.329g/cm3. Calculate (a) mass percentage (b)mole fraction (c) molality (d) molarity of H2SO4 in this solution.
*September 2, 2010 by Anonymous*

**college chemistry**

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
*January 5, 2015 by Kyle *

**math**

A liquid spray of mass 384 g is packed in a cylindrical container of internal radius 3.2cm. Given that the density of the liquid is 0.6g/cm3, calculate to 2 decimal places the height of liquid in the container.
*February 15, 2015 by kudu*

**algebra 1**

cube root of (-64x^8y^5) Is it -8x^2y times the cube of y^2?
*November 18, 2014 by matt*