Friday

January 30, 2015

January 30, 2015

Number of results: 59,720

**Physics Last Question HEEEELLLPPP !**

#1 The internal energy of the gas in a gasoline engine’s cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The internal energy of the gas increases b. The volume of ...
*December 12, 2010 by Jarrid*

**math**

bob can fill bucket in 25 seconds in the sink, sue can fill same bucket in 17 seconds with hose, how much longer will it take bob to fill 15 buckets
*January 15, 2013 by Jen*

**physics**

Stuck on this homework problem, any help would be appreciated. Thank you!! A truck has 5.9L diesel engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression ratio and with 6psi (0....
*May 5, 2014 by xyz*

**algebra**

In a certain year, brand A of a heart-rate watch cost $35.77 and brand B cost $56.77. A non-profit community health organization purchased 35 heart-rate watches for use at a wellness center. If the organization spent $1504.95 for the watches, how many of each type did they ...
*January 13, 2015 by Liamz*

**stats**

In order to make sure that their bags of chips are of sufficient weight, the Chipper Chip Company try to fill their 200 gram bags of chips with more than 203 grams. You have been given the task of investgating what proportion of bags produced do have over 203 grams of chips in...
*October 22, 2010 by lollzzz *

**chemistry**

if you mixed 7 grams of iodine pentafloride with 2 grams of water which substance would be the limiting reactant?
*November 16, 2010 by ty*

**Chemistry**

If 453.6 grams of nitroglycerin were to decompose/ detonate completely, how many grams of water would be produced?
*December 27, 2010 by Sarah*

**Chemistry**

If your Copper(II)sulfate solution contains 0.8 grams of Cu and you recovered 0.76 grams of it, what would be the percent yield?
*March 20, 2014 by Beandip*

**physics**

A fully loaded 737 aircraft takes off at 250km/h.If its acceleration is a steady 3.3 , how long a runway is required? How much time does it take the plane to reach takeoff?
*September 20, 2010 by kt*

**chem**

find the density of a cube if it has a mass of 2 grams and has a length of i centimeter on each edge/
*January 9, 2009 by tonya*

**Chemistry**

what is the density of an unknown substance whose mass is 4.5 grams and volume is 5 mil?
*January 8, 2010 by Gary *

**physical science**

An object has a length of 5.0 cm, a height of 3.0 cm and a width of 15.0 cm. It has a mass of 24 grams. What is its density?
*November 23, 2010 by t.o*

**9th grade**

a object has a mass of 30 grams and a volume of10 cm^3. what is the density of the material?
*December 8, 2010 by ceeceee*

**chem**

How many grams of ethylene glycol, HOCH2CH2OH, are present in 5.6 gallons of a 4.81 m solution with a density of 1.98 g/mL? g
*May 2, 2011 by jan*

**Chemistry**

How many grams of ethylene glycol, HOCH2CH2OH, are present in 5.3 gallons of a 5.22 m solution with a density of 1.83 g/mL?
*May 9, 2011 by teena*

**science**

a sample of metal has a mass of 94.5 grams and a volume of 7 cubic centimeters. what is its density?
*September 12, 2011 by zeke*

**science**

A sample of metal has a mass of 94.5 grams and a volume of 7 civic centimeters. What is its density?
*September 18, 2011 by sarah*

**PHYSICAL SCIENCE**

An object has a length of 5.0 cm, a height of 3.0 cm and a width of 15.0 cm. It has a mass of 24 grams. What is its density
*September 11, 2012 by DEOCRIOUs*

**science**

An object has a mass of 10 grams and a volume of 5cm3 calculate the objects density
*September 24, 2012 by santriese*

**chemistry**

How many grams of copper can be dissolved by 20.0 mL of a 69.6% (by mass) nitric acid solution that has a density of 1.41 g/mL?
*February 8, 2013 by G.A*

**math**

Find the density of an object which has a mass of 360 grams and fills a volume of 36 mL.
*February 19, 2013 by heather*

**computer Science (need answer ASAP)**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 6, 2011 by Will*

**Statistics**

A sign on the gas pump of a certain chain of gasoline stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. What is the probability that exactly 3 of the next 10 cars entering a station should have ...
*February 10, 2007 by Matt*

**math**

Find three brands of a grocery item that you purchase and figure the price per unit (i.e., per ounce or pound) for each brand. Provide the item and for each brand of the item the bulk cost, unit quantity, and unit cost.
*October 12, 2012 by Anonymous*

**Chemistry**

A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? Calculate grams of acetic ...
*April 22, 2012 by Kate*

**Chem**

4C3H5N3O9 -> 6N2 + 12 CO2 + 10H20 + O2 a) how many grams of water would be produced if 75 g of nitroglycerin decompose? b) The creation of 3.89 moles of CO2 would require how many grams of nitroglycerin?
*October 9, 2010 by MAX*

**computer science**

Write a complete C# program that displays a menu comprising of the followings: Main Menu 1) Calculate Fuel Consumption 2) Calculate Weekly Wages 3) About This Program 4) Exit Program Enter your Choice: Calculating Fuel Consumption When the user chooses this option, the program...
*March 7, 2011 by Will*

**Math**

You have to choose a battery brand to use in your smoke alarm. Company A's batteries have a mean lifespan of 1.2 years, with a standard deviation of 0.1 years. Company B's batteries have a mean lifespan of 1.5 years, with a standard deviation of 0.9 years. Which brand would ...
*April 29, 2014 by Chloe*

**science**

how many grams of copper sulfate pentahydrate (CuSO4 5H2o) would you heat to produce 29.8 grams of water?
*March 18, 2009 by timmy*

**English**

Can anyone give me details or tell me what else should I talk/ more information on something. I ran out of ideas/ thoughts. This is what I got. What media would you use for your communication skills to advertise? I would used the television for my communication skills to ...
*February 14, 2011 by Anna*

**managerial economics**

An article in Business Week reported the discovery of a new processing technology that makes it economically feasible to turn natural gas into liquid petroleum that yields superclean gasoline, diesel fuel, or any other product derived from crude oil. This discovery represents ...
*April 1, 2014 by crystal*

**Math**

I need to equal $1.00 and 30 grams With quarter .25=6 grams dime .10=2 grams nickel .05=5 grams
*October 16, 2008 by Corey*

**Chemistry- Drbob-help**

I have placed the answer I got please help. A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 870mL 2. Calculate the % ...
*February 9, 2011 by Paul*

**chemistry**

thanks for helping me with the list. By checking the product's labels I'm finding many of the substances the problem now is that i found a product with hydrocarbon in it but I do not know how to figure out if its molecular mass is greater than 100g/mol what is the name of the ...
*February 4, 2007 by desperate*

**Chemistry**

I'm stuck on this one problem in Chemistry: A student measures the mass of an object as 2.32 grams and its volume as 34.56mL. The student then calculates the density to be 0.067129629. There are two things wrong with the students value for density. What are they? Now when I ...
*September 14, 2007 by Chervonna*

**chemistry**

If 60 grams of KCl can be dissolved in 100 grams water. Would the remaining solution be unsaturated, saturated, or supersaturated?
*December 6, 2010 by Amanda*

**Chemistry**

If 4.00 grams of the hydrate in #1 are heated how many grams of anhydrous salt would remain after all the water was liberated?
*September 24, 2013 by sTin*

**Chemistry**

If 30 grams of KCl is dissolved in 100 grams of water at 40 degrees celsius, how many additional grams of KCl would be needed to make the solution saturated at 80 degrees celsius?
*April 18, 2012 by Sarah*

**chemistry**

Al2(SO4)3+6KOH-->2Al(OH)3+3K2SO4 a)How many grams of potassium hydroxide are needed to completely react with 870 mg of aluminum sulfate? b)If you want to make 7.00 grams of potassium sulfate, how many grams of aluminum sulfate would you need to react? c)How many grams of ...
*April 29, 2013 by ashley*

**science 7 grade**

You place 75 mL sea wter in a graduated cylinder with a mass of 55 grams mass of sea water and cylinder together is 140 grams what is the density of the sea water g/mL
*September 23, 2012 by mary*

**chemistry**

The density of a gas is 2.0 grams per liter at STP. Its molar mass is approximately?
*March 5, 2009 by Crystal*

**Physical Science**

if an object has a mass of 615 grams and a volume of 105cm3 is the density 5.86 g/cm3?
*April 14, 2010 by cassie*

**physics**

the density of a block of wood with a colume of 50 cubic centimeters and a mass of 10o grams is
*April 21, 2011 by Anonymous*

**Chemistry**

What is the mass of a solution that has a volume of 0.100L and a density of 1.07g/ml. Find in grams and In kilograms.
*February 12, 2012 by Deb*

**physical science**

what is the density of a peice of wood that has a mass of 25.0 grams and a volume of 29.4cm cubes?
*September 13, 2012 by sierra*

**Chemistry**

What is the density, in grams per milliliter, of a salt solution if 210 mL has a mass of 234 g?
*October 31, 2014 by Gili*

**chem hwk**

a simple hwk question.. i don't understand what i need to do.. 1-butanol (shown below) burns in the presence of oxygen to give off carbon dioxide and water by the following reaction: C4H9OH + 6 O2 ==> 4 CO2 + 5 H2O If 40.88 mL of 1-butanol burns completely, how many grams ...
*January 24, 2013 by wll.i.am*

**Chemistry**

'Place the letter of the item in Column II before its best match in Column I' Column 1: 41. Unit of volume 42. unit of mass 43. unit of temperature 44. unit of density 45. .01 of a meter Column II: a. grams b. grams/cm^3 c. Kelvin d. milli e. cubic meter f. centimeter 41- b 42...
*October 19, 2010 by mysterychicken*

**Chemistry**

Would you mind checking these mole/unit conversion problems over? I understood them in class today, but that was hours ago, so now I need to start all over again. How many moles of GaBr3 are in 983 grams? I got 983g times 1mole/309.42, which equaled 3.18. Is this correct? If ...
*April 7, 2009 by Meghan*

**Math**

Five pounds of birdseed is used to fill 4 identical bird feeders. A. What fraction of the birdseed will be needed to fill each feeder B. How many pounds of borked seed are used to fill each feeder? C. How many ounces of birdseed are used to fill three bird feeders?
*February 5, 2014 by Garrett *

**Chemistry**

Need help with this-- 'Place the letter of the item in Column II before its best match in Column I' Column 1: 41. Unit of volume 42. unit of mass 43. unit of temperature 44. unit of density 45. .01 of a meter Column II: a. grams b. grams/cm^3 c. Kelvin d. milli e. cubic meter ...
*October 19, 2010 by mysterychicken*

**physics**

Please see if I am doing this problem right. A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4 X 10^-3 m^2 and is displaced inward by 7.2 X 10^-2 M. If 9.5 X 10^5 Pa of pressure is placed on the piston, how much work is done ...
*February 4, 2007 by Anonymous*

**chemistry**

How many grams of aluminum would react completely with 17.50 grams of copper (II) chloride according to the following equation? Al(s) + CuCl2(aq) ---> AlCl3(aq) + Cu(s
*June 19, 2010 by andrea.*

**Chemistry**

If you weighed out 0.38 grams of calcium and reacted it with excess amount of HCI how many miles of H2 grams would you expect to produce?
*November 1, 2014 by Joann*

**Statistics**

The Gibbs Baby Food Company wishes to compare the weight gain of infants using their brand versus their competitor’s brand. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds in the first 3 months after birth. The standard deviation of ...
*February 28, 2010 by Barbara*

**Science**

I did a science experiment on batteries. I ran five brands of AA Alkaline batteries until they would no longer run a small light bulb. I measured the voltage of each battery every hour. I did this experiment four times using the same type of light bulb and the same brand of ...
*February 17, 2008 by Leah*

**calcium cloride**

we are having a ice cream industry we are using calcium cloride to get -35 degree now we are getting -25 degree density of liquid is 1.210 how many kilo grams of calcium cloride to mix in liquid to get the density of 1.300 the liquid is nearly 3000 liters
*April 3, 2011 by chitti*

**Physics**

After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse into a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of earth. (a) Calculate the average density of the white ...
*October 4, 2011 by bob*

**Health**

Why do people say that we should have a big breakfast and a small dinner? Thank you for using the Jiskha Homework Help Forum. Think about your car and filling it up with gasoline, etc. before you take a long trip. You need energy to run on as you begin your day. During the day...
*February 4, 2007 by Sammy*

**Math**

The amount of money Kylie spends on food to the amount she spends on gas per week is 7:4. She spends $45 more on food than gas. How much does she spend on food? How much does she send on gas? On one of the weeks, she spends an additional $75 on food for a dinner party. What is...
*January 16, 2013 by Jillian*

**Physics and chemistry **

Chapter 1 & 2 Review Questions 1. Compare and Contrast the two main branches of physical science. 2. Distinguish between scientific laws and scientific theories. 3. Describe the steps of the scientific method. 4. Explain the objective of a consistent system of units, and ...
*December 13, 2010 by mido*

**physics......PLEASE HELP!!**

A steam engine absorbs 1.98*10^5 J and expels 1.49*10^5 J in each cycle. Assume that all of the remaining energy is used to do work. a. What is the engine's efficiency? b. How much work is done in each cycle? If a gasoline engine has an efficiency of 21 percent and loses 780 J...
*February 14, 2007 by anonymous*

**english 12**

This is 3 our of 5 stories that I have to read and the questions are getting tougher and tougher. The story is called "Bless this house" by Christianna Brand. The question is try your hand at explaining Brand's way of handling setting in this story. Think about the story as ...
*June 9, 2009 by Yana*

**Physics**

The masses of 1 mole of various gases are as follows: hydrogen about 2 grams, helium about 4 grams, nitrogen about 28 grams, oxygen about 32 grams and carbon dioxide about 44 grams. On the average how fast does a molecule of each gas move at 333 Celsius?
*April 6, 2010 by Benny*

**physics**

The masses of 1 mole of various gases are as follows: hydrogen about 2 grams, helium about 4 grams, nitrogen about 28 grams, oxygen about 32 grams and carbon dioxide about 44 grams. On the average how fast does a molecule of each gas move at 333 Celsius?
*April 6, 2010 by Plaster*

**physics**

A rectangular box of negligible mass measures 5m by 1m by .5m. How many kgs of mass can be loaded onto the box before it sinks in the water? V=5*1*.5 = 2.5m^3 density of water =1g/cm^3 =1000 kg/m^3 I also know that when the density of the mass is greater than the density of ...
*December 3, 2007 by Tammy*

**physics**

A rectangular box of negligible mass measures 5m by 1m by .5m. How many kgs of mass can be loaded onto the box before it sinks in the water? V=5*1*.5 = 2.5m^3 density of water =1g/cm^3 =1000 kg/m^3 I also know that when the density of the mass is greater than the density of ...
*December 3, 2007 by Tammy*

**Chemistry**

Consider: C6H12)6 + 6O2-> 6CO2 + 6H2O + Energy a)If I have 90 grams glucose and all is consumed by oxygen, then how many grams of water will be produced? b)How many grams of oxygen will be consumed? c)How many grams of sugar will be burned off if 85 grams of O2 is consumed?
*January 22, 2011 by Lindsey*

**Chemistry**

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 930. J of energy, to what volume will the gases expand against a constant pressure of 670. torr if all the energy of combustion ...
*March 25, 2011 by Samir*

**statistics**

according to the energy information administration (officially energy statics from the US Government) the mean price for one gallon of unleaded regular gas in the US cities for the year 2007 was 2.80 A random sample of 30 pumps in georgia yielded and average price of 284 per ...
*December 6, 2011 by jen*

**Science**

Calculate the density if the mass of a solid material is measuered as 15.00 grams and its volume is measured as 5.0cmCUBED?
*August 20, 2008 by Kyle*

**Chem Honors**

at what temperature will nitrogen gas have a density of 1.13 grams/meters at a pressure of 1.09 ATM
*February 11, 2011 by Ari*

**chemistry**

If I have 10 silver coins and they weigh 55 grams and displace water from 25 mL to 35 mL, what is the density? What is the specific gravity?
*June 26, 2011 by S*

**chemistry**

If the density of an element is 6 g/ml, how much space (in milliliters) should a sample of it displace if it has a mass of 2.4 grams?
*September 22, 2011 by gia*

**Science**

Calculate:what is the density of a metal block that has a mass of 750 grams and a volume of 55 cubic centimeters?
*October 12, 2011 by Faith*

**Chemistry**

What is the density of Li2S in grams per cubic centimeter, if the edge length of the unit cell is 5.88*10^2 pm?
*January 30, 2012 by amicus*

**Chemistry**

If I have 10 silver coins and they weigh 55 grams and displace water from 25 mL to 26 mL, what is the density? What is the specific gravity?
*June 29, 2013 by Dana*

**chemistry**

a block of metal has a volume of 13.4in^3 and a weight of 5.14 lb. what is its density in grams per cm^3? Show operation
*July 10, 2014 by michael*

**Science**

If You Heated 100 Grams Of Powdered Mercuric Oxide To Produce 93 Grams Of Liquid Mercury How Much Oxygen Would Be Released
*November 10, 2014 by Sarah *

**Chemistry**

The population of San Francisco is 750,000 in an area of 49 square miles. What is the population density in San Francisco? Express your answer in people per acre. ( 1mi(squared) = 640 acres ) 49 sq mi x (640 acres/1 sq mi) =?? acres. (Note that sq mi cancels leaving acres.) ...
*September 13, 2006 by Jamie*

**chemistry**

What is the density of propene gas measured at 2.5 atm and 47C? I know that I use the combine gas law, but I dont know how to find "n" in this particular problem. Please help ASAP!
*November 30, 2011 by Henry*

**algebra**

A garden hose can fill a swimming pool in 7 days, and a larger hose can fill the pool in 4 days. How long will it take to fill the pool if both hoses are used?
*September 9, 2014 by Paige *

**Physics **

Why are the tires for trucks carrying gasoline and other ﬂammable ﬂuids manufactured to be electrically conducting? 1. To make the truck easier to drive 2. To move the positive charges from the truck to the ground and avoid ﬁre 3. To neutralize the charges...
*February 7, 2013 by Tiffany *

**algebra**

Jessica is baking a cake. The recipe says that she has to mix 96 grams of sugar to the flour. Jessica knows that 1 cup of this particular sugar has a mass of 128 grams. She added one over two of a cup of sugar to the flour. Should Jessica add more sugar to make the exact ...
*September 9, 2014 by Anonymous*

**Calc **

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.1t ). What percentage of this brand of computer chips are expected to be usable after 6 years? (Round your answer to one decimal place.) ___ %
*July 18, 2012 by Jim *

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 5, 2014 by Vanessa*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 6, 2014 by Vanessa*

**math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 7, 2014 by vanessa*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*April 7, 2014 by Vanessa*

**chemistry**

P (atm) V (L) n (mol) T 5.08 (Fill in) 2.00 141 degress C i need to fill in the volume PLEASE HELP. THANKS
*April 20, 2010 by carson*

**Chemistry**

Acid Question!? An unusual category of acids known as superacids, which are defined as any acid stronger than 100% sulfuric acid, can be prepared by seemingly simple reactions similar to the one below. In this example, the reaction of anhydrous HF with SbF5 produces the ...
*March 30, 2007 by Anonymous*

**Thank you Ann (kinematics)**

Thank you Ann! I had the equations and really was closing in on the answer... (stopping for 23 s is what really got me confused) in either case, the displacement for a) is 888 m ! Now I'll try to calculate (b). Thank you much! P.S. This is in response to my earlier physics (...
*January 31, 2007 by eric (new chem or physics prob. in)*

**physics**

If two marbles having mass of 27.7 grams and of 3.6 grams have stuck together where do they land and how much kinetic energy would be lost ?
*December 9, 2010 by Eduardo *

**Science**

1.If you have an object that has a mass of 8 grams and a volume of 4 cm3 , what is the objects density? 2g/cm3 2.A rock is found in nature with a mass of 36 grams. When using the water displacement method, the water level began at 30ml and rose to 36ml once the rock was put in...
*May 4, 2013 by Jerald*

**Science**

aluminum has a density of 2.7g/cm3 while copper has a density of 8.96g/cm3. Which metal would you choose to build a model airplane? why?
*September 16, 2014 by Brianna*

**math**

Hose A can fill a pool in 4 hours. Hose B can fill the pool in 2 hours.If both hoses are turned on at the same time, how long will it take the pool to fill?
*September 27, 2010 by neena*

**Math **

If it takes 4 minutes to fill a bucket with one tap and 6 minutes to fill the bucket with another tap. Using both taps how many seconds will it take to fill the bucket?
*February 4, 2013 by Clara *

**Statistics**

Please help, need advise. Thanks A The amount of pyridoxine (in grams) in a multiple vitamin is normally distributed with = 110 grams and = 25 grams. What is the probability that a randomly selected vitamin will contain less than 100 grams of pyridoxine? ì ó B The amount of ...
*July 23, 2008 by Fiza*

**algEBRA word problem**

1 julies car travels 27 miles per gallon of gassoline used. she recently travedled 324 miles. how many gallons of gasoline did her car use? im learning about algebra multiplicaion property of equality and divsion property of equality would i write: i know i have to divide 324...
*October 18, 2011 by marko*

**7th grade**

a rectangular block measures 2cm * 1.5cm *1cm .the mass of the object is 31.5 grams .what is its density ?
*December 8, 2010 by Anonymous*

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