Monday

January 23, 2017
Number of results: 58,046

**Chemistry**

A swimming pool, 10.0 m by 4.0 m, is filled with water to a depth of 3.0 m at a temperature of 20.2°C. How much energy is required to raise the temperature of the water to 24.0°C?

*October 27, 2015 by Stacey*

**Math**

If you made the largest possible filled in square with 800 square tiles, how many extra tiles would you have?

*May 19, 2016 by Raya*

**Physics**

the mass of an empty density bottle is 4og and 5og when filled with liquid x.calculate the density of liquid x when dem

*October 14, 2016 by WELLINGTON*

**Science**

A cicular pool with a radius oF 12 meter if filled with water to a depth of 3 meters. What is the weight of water in the swimming pool?

*October 19, 2016 by Kim*

**Calc**

Find a cubic function, in the form below, that has a local maximum value of 3 at -2 and a local minimum value of 0 at 1. f (x) = ax3 + bx2 + cx + d

*November 16, 2009 by Jared*

**Chemistry**

The density of an unknown metal is 1.55 and its atomic radius is 0.197 . It has a face-centered cubic lattice. What is the atomic weight of this metal?

*February 20, 2010 by Amanda*

**calculus**

How do you find the x-intercept of a cubic graph? For example y=2x^3+2, also, how does the 2 in front of the x influence the graph when compared to having a one in front?

*April 12, 2011 by Ally*

**Chemistry**

Can someone please help with this problem and explain it please? If soil has a density of 1.32 g/cm cubed, then what does 1.0 cubic yards of soil weigh in pounds?

*January 21, 2013 by Sally*

**Math**

How much water could a swimming pool hold that is 25 feet Long, and 8 feet wide, and 6 feet deep? Your answer will be in cubic feet.

*September 30, 2015 by Amy*

**Maths**

If alpha&beta are the zeros of the cubic polinomial kx square-5x+k. If alphacub+beta cube +gama cube is 27.find the value of.k.?

*June 2, 2016 by Navaneeth*

**chemistry**

if the ratio of oxygen to air is approximately 1 to 5 and the ratio of oxygen to ethyne is 2 to 5, how do i calulate the ratio of air to ethyne?

*February 26, 2008 by jay*

**CHEM**

I don't understand how to find the formula of a hydrate. Here's one of the question. if you guide me through it I think I'll be able to do the rest of them. Thanks :) When 100g of ZnSO4xœH2O is heated, 43.86g of water is given off. Calculate the formula of the hydrate.

*January 22, 2009 by Lena*

**Chemistry**

A cup of teat containing 400g of liquid at 20 degrees celsius was heated. If 58.5 kj of heat was absorbed by the tea, what would the final temperature be? Assume that the specific heat of the tea is the same as that of water (4.18). I am not sure how to start this problem.

*January 21, 2012 by Hannah*

**Physics**

A 0.200 kg block of ice at -15 degrees Celsius is placed into a pan on a stove, heated to a liquid, and then to vapour with a final temperature of 115 degrees Celsius. Calculate the total amount of heat required for this process.

*January 7, 2013 by Anonymous*

**Thermodynamics**

A 196-g aluminum calorimeter contains 530 g of water at 19.8° C. Aluminum shot with a mass equal to 273 g is heated to 100.0° C and is then placed in the calorimeter. Find the final temperature of the system, assuming that there is no heat transfer to the surroundings.

*February 1, 2015 by Nick*

**Math**

The diameter of a cylindrical can of motor oil is 3.5 inches (in). The height of the can is 6.5 in. Approximately how many cubic inches of oil will the can hold?

*May 1, 2008 by Chelsea*

**MATH**

Find the volumes of the solids generated by revolving the region in the first quadrant bounded by the following about the given axes. x = y - y3, x = 1, y = 1 (b) Revolved about the y-axis ? Hi Shawn, 97/105 * pi ? :) We need to cut away the volume of the region you get by ...

*February 9, 2007 by Shawn*

**physics**

Would someone check my thinking please. A solid sphere (mass, r, and moment of inertia given) is rotating at a given angular speed. Friction is constantly applied at the 'equator' of the sphere, and brings it to rest in 3s. Find the force. I worked out the torque, and then ...

*June 15, 2009 by charlie*

**Jennifer**

I asked this question yesterday and it was answered, but I still have a question on it. Standard entropies for substances are defined at a pressure of exactly 1 bar in some books or exactly 1 atm(760 torr) in different books. For gases, this correction factor would be..... in ...

*April 4, 2007 by Chemistry*

**physics**

I need help solving these problems. I tried but my teacher did not teach it to us so it is very difficult for me. Thanks. "Projectiles launched at an angle" 1. A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive. What maximum height will a 301.5 m ...

*October 24, 2006 by anonymous*

**Advanced Math.**

Write an equation in slope-intercept form of the line whose parametric equations are x= (1/2)t + (2/3) and y= t – (3/4). t = y + 3/4 x = 1/2(y + 3/4) + 2/3 2x = y + 3/4 + 4/3 2x = y + 25/12 y = 2x - 25/12 A force F1 of 35 newtons pulls at an angle of 15 degrees north of due ...

*June 17, 2009 by James*

**Statics**

If both the projection Pa and component Fb of the force F are 305 N, determine the magnitude F and the orientation è of the b-axis. The angle between the negative y axis and the a- axis is 70 degrees. The angle between the negative y axis and the force F is 108 degrees. I ...

*September 1, 2014 by Tim*

**Geography**

Regarding tropical rainforests, the term evapotranspiration refers to the fact that A. deforestation causes a decline in atmospheric oxygen. B. the humidity of rain forests can produce local and regional precipitation C. deforestation causes a loss of soil fertility due to ...

*July 11, 2014 by Suzanne*

**Chemistry**

The reaction 2NO (g) + 2H2 -> N2 (g) + 2H2O (g) was found to follow the rate law, rate = k[NO]^2[H2]. By what factor will the rate of reaction increase when the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant. I'm ...

*July 13, 2016 by Mikey*

**english**

can someone explain how to use the word serenity in a sentence? examples please? Would you say someone is filled with serenity?

*December 11, 2007 by Anonymous*

**phy**

An ordinary glass is filled to the brim with 350.0 mL of water at 100°C. If the temperature decreased to 19°C, how much water could be added to the glass?

*November 24, 2010 by ami*

**physics**

a 64.0L gas tank is filled at 6.00C. the next day the temperature gets up to 27.00C how much gas (octance) voerflows?

*February 28, 2011 by ricki*

**physics**

a 64.0L gas tank is filled at 6.00C. the next day the temperature gets up to 27.00C how much gas (octance) voerflows?

*February 28, 2011 by ricki*

**physics**

a 64.0L gas tank is filled at 6.00C. the next day the temperature gets up to 27.00C how much gas (octance) voerflows?

*February 28, 2011 by ricki*

**physical science**

find the mass of sodium chloride formed when 6.9g of sodium burns in a gas jar filled with chlorine gas.

*February 22, 2012 by winston*

**Chemistry**

A 100 mL container is filled with 0.01 mol of A2B3. At equilibrium, it also contains 0.006 mol of B. Find the value of K. A2B3(g) --> 2A(g) +3B(g)

*May 11, 2012 by Sandra*

**Math**

Reasonableness John has 4 cups filled with fruit juice. He said that he has a gallon of fruit juice. Is his statement reasonable? Explain why or why not.

*May 23, 2013 by Quan*

**Math**

A tank is filled in 9 hours and drained in 11 hours. How long will it take to fill the tank if the drain is left half open

*January 31, 2014 by Anonymous*

**math**

A tank is filled in 9 hours and drained in 11 hours. How long will it take to fill the tank if the drain is left half open

*January 31, 2014 by Anonymous*

**bautista creek**

John has 4 cups filled with fruit juice.he said that he has a gallon of fruit juice.Is his statement reasonable? explain why or why not.

*March 4, 2015 by angel*

**math**

An 8 liter can filled with cooking oil weights 42kg. When 5 liters are emptied from the can,the can and the oil weight 27kg.What is the weight of the empty can?

*September 1, 2016 by Jun*

**physic**

a cold drink bottle of 500 ml weight 25g .when a liquid is filled in it ,it weight 80g .find the density of liquid .

*October 19, 2016 by neha*

**math**

At 9:30a.m, Sean started filling a swimming pool. At 11:30a.m, he had filled 1,800gallons. At what time will the pool be full?

*January 19, 2017 by aliyah*

**chemistry**

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm , to what pressure should you fill ...

*October 8, 2008 by unknown*

**chemistry**

magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...

*April 30, 2010 by Anonymous*

**Chemistry**

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill ...

*October 11, 2010 by Michelle*

**Chemistry**

Imagine that you have a 5.00 L gas tank and a 4.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill ...

*April 26, 2012 by Wolfgang*

**Chemistry**

Imagine that you have a 7.00 L gas tank and a 4.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 136 bar , to what pressure should you fill ...

*October 12, 2015 by Emily*

**chemistry**

Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm , to what pressure should you fill ...

*February 26, 2016 by lily*

**Physics multiple choice**

1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered my answer: c 2. Which is true a) the ...

*June 27, 2014 by Liz*

**Chem**

A 2.00L flask is filled with propane gas(C3H8)at 1.00atm and 15C. What is the mass of propane in the flask?

*April 5, 2010 by Britt*

**Chemm**

A 2.00L flask is filled with propane gas(C3H8)at 1.00atm and 15C. What is the mass of propane in the flask?

*April 6, 2010 by Courtney*

**science**

hellium gas is added to a balloon already partially filled with helium gas.why does the balloon inflate?

*August 21, 2011 by cham*

**Science**

Helium gas is added to a ballon already partially filled with helium gas the balloon inflated because the

*February 5, 2012 by Star*

**math**

A theater has 1500 seats. One night, 9 out of 10 seats were filled. How many people attended that night?

*January 18, 2013 by MP*

**physics**

a spherical balloon of diameter 2m is filled with helium.Assume STP .how much is contained in the balloon helium

*May 1, 2015 by Anonymous*

**vskd**

Maths If one third of the bucket can be filled in 3 min,how many min it take to fill whole bucket

*October 22, 2015 by mahesh*

**chemistry**

A 2.00 L flask is filled with propane gas (C3H8)at 1.00 atm and -15.0 Degrees Celsius. What is the mass of the propane in the flask?

*May 24, 2016 by Anna*

**physics**

If a car crashes into a wall, the wall puts force on the car. The car puts an equal force on the wall. What does each force do?

*January 20, 2015 by Anonymous*

**physics**

A fresh water pond that is 14.7 m deep is contained on one side by a cliff. The water has eroded a nearly horizontal "tube" through a bed of limestone, which allows the water to emerge on the other side of the cliff. If the "tube" has a diameter of 4.07 cm, and is located 6.0 ...

*December 6, 2010 by jujubes*

**physics**

The work done by one mole of a monatomic ideal gas () in expanding adiabatically is 825 J. The initial temperature and volume of the gas are 393 K and 0.100 m3. Obtain (a) the final temperature and (b) the final volume of the gas.

*June 9, 2010 by kels*

**science**

The work done by one mole of a monatomic ideal gas (y=5/3) in expanding adiabatically is 825 J. The initial temperature and volume of the gas are 393 K and 0.100 m3. Obtain (a) the final temperature and (b) the final volume of the gas.

*June 9, 2010 by kels*

**chemistry**

You have .1 moles of H3PO4 in a soln with a total volume of 250 mL. You then add .15 moles of NaOH and dilute the soln to a total volume of 1L calculate the pH of the resulting soln and the concentrations of all aqueous species. Thanks!!!!

*July 26, 2012 by kellie*

**physics, social studies**

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost into the air. Most of ...

*April 13, 2008 by Pamela*

**physics**

A prospector finds a solid rock composed of granite ( = 2650 kg/m3) and gold. The volume of the rock is 3.05 10-4 m3 and its mass is 3.57 kg. What mass of gold is contained in the rock? I thought that I could used some ratio, but I have no idea how. Our teacher hasn't even ...

*June 19, 2007 by JJ14*

**WORD UNSCAMBLE**

GWUOER SDSETH Try these: http://www.ssynth.co.uk/~gay/anagram.html http://www.unscramble.net =) PFEEAIRLC,TVEESLIANN eeiochrs

*December 9, 2006 by MALISSA*

**physics**

Force F has units of kg m/s2 . The electric force between an object of charge Q and a second object of charge q separated by a distance r is given by F= k Qq/ r2 , where k is a constant. In order to determine the charge of q, the electric force between the two charges is ...

*September 7, 2010 by sania*

**Physics(Please respond)**

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 71 kg, and the height of the water slide is 12.0 m. If the kinetic frictional force does -7.4 × 103 J of work...

*June 1, 2012 by Hannah*

**science**

'Copper' pennies actually contain very little copper. If a penny contains 91.768 % of its total volume zinc and 8.232 % of its total volume copper, what is its density? (d of Cu = 8.95 g/cm3; d of Zn = 7.14 g/cm3.)

*August 18, 2009 by Arthur*

**chem**

A stack of 15 pennies is immersed into a 100 mL graduate initially containing 20.6 mL of water. The volume in the graduate cylinder increases to 26.0 after the pennies are added. Calculate the volume in mL of the stack of 15 pennies.

*August 28, 2013 by Anonymous*

**chemistry**

When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 22.8 g copper(II) oxide is used?

*January 25, 2011 by nikki*

**Chemistry**

For a 5.0 g sample of CoCl3·9H2O, what weight of water (in grams) will be lost if the sample is heated to constant weight (all water driven off)?

*February 6, 2012 by Allie*

**Chemistry**

When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 34.0 g copper(II) oxide is used?

*February 24, 2014 by Grace*

**chemistry**

cobalt chloride forms pink crystals. when they are heated water is evolved an they turn blue. can you please explain how you could ue cobalt chloride as a test of water.

*September 5, 2010 by Anonymous*

**science**

It says; the temperature of 50g of water was raised from 5 degrees celsius to 85 degrees celsius. then it asks me: what amount or mass of water was heated? how do i find that out?

*October 14, 2012 by Johna*

**science**

100.0g of 4.0c water is heated until its temperature is 37c. if the specific heat of water is 4.18 j/g c, calculate the amount of heat energy needed to cause this rise in temperature.

*August 25, 2014 by henry*

**college chemistry**

a 1.0kg sample of metal with a specific heat of 0.50KJ/Kg C is heated to 100.0C and then placed in a 50.0g sample of water at 20.0C . What is the final temperature of the metal and the water?

*September 30, 2014 by Kylie*

**science**

Calculate the weight of gold having specific heat capacity 0.13 joule which is heated from 25 degree c to 300 degree c, where the heat absorbed is 1500 joule?

*December 18, 2014 by mayank*

**Chemistry**

How to make 100 mL of 100mM of Tris HCl and 100 mL of 100mM of Tris Base. Follow the pH of the resulting combined solution as it is heated from 0 to 50 degrees Celsius.

*January 16, 2015 by Charlotte*

**physics**

water heated to 50 degrees celsius is poured on our body during bathing what is equilibrium temperature of our body.spesific heat of water is 1.

*June 21, 2015 by ramsaiteja*

**chemistry**

Cobalt Chloride forms pink crystals.When they are heated,water is evolved and they turn blue. .Explain how we could use Cobalt Chloride as a test for water??

*May 14, 2016 by qurat-ul-ain*

**Science**

Nh4hs dissociates in a vessel at temp T K in the presence of 0.5 atm nh3. At equilibrium the pressure due to h2s is 1.5 atm.In a vessel V2 ( initially evacuated) the solid dissociates at T K.The total pressure at equilibrium in vessel V2 is P.and the weight ratio of nh3 and ...

*November 28, 2016 by Preeti*

**principles of macroeconomics**

The following is a list of figures for a given year in billions of dollars. Using this data, compute: (a) GDP; (b) NDP; (c) NI; (d) PI; (e) DI; (f) Net exports. Transfer payments $ 16 Government purchases 80 Personal taxes 38 Corporate income taxes 28 Indirect business taxes ...

*February 8, 2013 by princess*

**Social Studies**

What Soviet Union leader cut ties with China after a heated discussion with Mao Zedong over Communist ideologies? a. Josef Stalin b. Vladimir Putin c. Mikail Gorbachev d. Nikita Khrushchev*** Just checking my work:) *** - My Answer Thanks, Kaai97

*October 27, 2015 by Kaai97*

**Chemistry: Raoult's Law**

If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25 C. I got this answer correct: 21.1 torr A solution is composed of 1.50mol ...

*September 2, 2010 by Sar*

**physics**

An artillery shell is fired at an angle of 48.2 degrees above the horizontal ground with an initial speed of 1530 m/s. THe acceleration of gravity is 9.8 m/s^2. Find the total time and flight of the shell,neglecting air resistance.Answer in units of minutes. Find its ...

*June 23, 2011 by alexa*

**Physics**

An artillery shell is fired at an angle of 55.7◦ above the horizontal ground with an initial speed of 1690 m/s. The acceleration of gravity is 9.8 m/s^2. a.Find the total time of flight of the shell, neglecting air resistance. Answer in units of min. b.Find its ...

*February 16, 2014 by Fabricus*

**Physics**

An artillery shell is fired at an angle of 26.8 degree above the horizontal ground with an initial speed of 1720 m/s. The acceleration of gravity is 9.8 m/s^. Find the total time of flight of the shell, neglecting air resistance. Answer in units of min. Find its horizontal ...

*October 12, 2015 by Luma*

**chem**

At standard pressure, ammonia melts at 195 K and boils at 240 K. If a sample of ammonia at standard pressure is cooled from 200 K down to absolute zero, what physical constants are needed to calculate the change in enhtalpy? I) the heat capacity of ammonia(s) II) the heat ...

*March 1, 2012 by please help !*

**chemistry**

At standard pressure, ammonia melts at 195 K and boils at 240 K. If a sample of ammonia at standard pressure is cooled from 200 K down to absolute zero, what physical constants are needed to calculate the change in enhtalpy? I) the heat capacity of ammonia(s) II) the heat ...

*March 1, 2012 by please help !*

**psychology**

"during a heated argument with his father, 15 y/o Jason developed a pralysis of his right arm. Medical examinations can find no physical cause for the paraplysis. Use the psychoanalytical perspective to explain how the paralysis may be Jason's attempt to deal with an ...

*December 17, 2010 by joan*

**Accounting**

The capital accounts of Hawk and Martin have balances of $160,000 and $140,000, respectively, on January 1, 2010, the beginning of the current fiscal year. On April 10, Hawk invested an additional $10,000. During the year, Hawk and Martin withdrew $86,000 and $68,000, ...

*March 31, 2014 by Big Dada*

**physics**

A pilot with a mass of 50 kg comes out of a vertical dive in a circular arc such that at the bottom of the arc her upward acceleration is 3.5g. (a) How does the magnitude of the force exerted by the airplane seat on the pilot at the bottom of the arc compare to her weight? (b...

*February 19, 2010 by mike*

**Physics**

A pilot with a mass of 50 kg comes out of a vertical dive in a circular arc such that at the bottom of the arc her upward acceleration is 3.5g. (a) How does the magnitude of the force exerted by the airplane seat on the pilot at the bottom of the arc compare to her weight? (b...

*September 29, 2010 by Jenny*

**Mathematics of Retailing**

An owner of a laundry shop received an invoice for purchasing 200 bottles of liquid detergent at RM15 each, and 300 bottles of fabric softener at RM8 each. The invoice dated on 6th August 2010. He was offered trade discount 10% and 8%, with cash discount 10/10, 5/20, n/30. The...

*December 9, 2012 by Michelle*

**Real Estate Finance**

The sale of a four family building will be closed on July 15. The seller collected rent from unit A $600, B $550, C $650, and D $650 for July. How should the rent be pro-rated on the closing statement? Who will be credited and debited and for how much?

*December 10, 2012 by tmouery*

**Real Estate Finance**

The sale of a four family building will be closed on July 15. The seller collected rent from unit A $600, B $550, C $650, and D $650 for July. How should the rent be pro-rated on the closing statement? Who will be credited and debited and for how much?

*December 10, 2012 by Anonymus*

**Calc**

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = y i − x j + z2 k S is the helicoid (with upward orientation...

*November 23, 2016 by Anon*

**Physics**

A sample of serum has a mass of 54 gm and a volume of 225cm. What's the density in g/cm? I think the answer is .24g/c please correct me of I'm wrong but my ? is what would be the mass of 150 fluid ounces of this serum? What would be the volume of 1 pound of this serum?

*June 21, 2011 by Wendell*

**physics**

A duck is floating on water with 26% of its total volume submerged below the surface. If the duck has a mass of 2.6kg, what is the duck’s total volume? You must show all necessary work, the density of water is 1000kg/m3.

*November 4, 2012 by Joe*

**math**

Which of the following is a formula for finding the volume of a cube? A. v=e^3, where e= the edge length B. v=(lwh)^3, wherel= length,w=width andh=height C.v=6e^2, where e=the edge length D. v=b*b, where b= the area of the base I picked A since V=s^3 or e^3 for the volume of a...

*March 30, 2013 by em*

**Chemistry**

HNO3 used as a reagent has a specific gravity of 1.42 g/ mL and contains 70% by strength HNO3. Calculate: Volume of acid that contains 60 g pure acid? Volume of water required to make 1 molar solution from 2 mL concentrated HNO3?

*August 7, 2014 by Anonymous*

**Physics**

Anna pushes horizontally on a 52-kg penguin with force of 10 N, but the penguin does not budge. Find the force of static friction between the penguin’s feet and the ground. I have no idea where to start. Any help is appreciated. Thanks.

*December 14, 2010 by Random*

**physics**

The engine of a 1250 kg car provides a forward directed force of 3,560 N. If the car accelerates at a rate of 2.60 m/s2, what is the total resistive force (wind resistance, friction, etc.) acting on the car?

*September 13, 2012 by nate*

**PHYSICS**

The engine of a 1250 kg car provides a forward directed force of 3,560 N. If the car accelerates at a rate of 2.60 m/s2, what is the total resistive force (wind resistance, friction, etc.) acting on the car?

*September 13, 2012 by John*