
Math
Can you help me ? I need to figure formula if I have $2023.60 what percent is it of $55,953.77? Also need to figure formula if I have $22,046.02.01 what percent is it of $55,953.77?
asked by Elle on April 16, 2014 
AP Physics
You go to kitchen to boil water. You pour 280 gram of water to a container, and put the container on a 293 W electric heater. Assume that all the heat from the heater is used to heat the water. The specific heat of water is 4.19 J/g ° C. As always, be
asked by Sasami on December 3, 2009 
AP Physics  Equilibrium
The Achilles tendon is attached to the rear of the foot as shown in the figure below. When a person elevates himself just barely off the floor on the ball of one foot, estimate the tension Ft in the Achilles tendon (pulling upward) and the (downward) force
asked by Henry on November 13, 2009 
chemistry
Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent
asked by Leah on February 23, 2010 
math
A tree is struck by lightning. The top part breaks and falls to the ground. The part of the tree still standing is 30 feet tall and the top part that hit the ground is 40 feet from the base of the tree. How tall was the tree originally?
asked by Jess on January 10, 2013 
Physics
Find the x and ycoordinates of the center of gravity of a 4.00 ft by 8.00 ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. The dimensions of the cutout are a = 4.50 ft and b = 1.70 ft. HINTS: Think of the
asked by Stephanie on October 28, 2014 
physics
Find the x and ycoordinates of the center of gravity of a 4.00 ft by 8.00 ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. The dimensions of the cutout are a = 4.50 ft and b = 1.70 ft. HINTS: Think of the
asked by frank on October 28, 2014 
physics
Find the x and ycoordinates of the center of gravity of a 4.00 ft by 8.00 ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. The dimensions of the cutout are a = 4.50 ft and b = 1.70 ft. HINTS: Think of the
asked by john on October 28, 2014 
physics
Find the x and ycoordinates of the center of gravity of a 4.00 ft by 8.00 ft uniform sheet of plywood with the upper right quadrant removed as shown in the figure below. The dimensions of the cutout are a = 4.50 ft and b = 1.70 ft. HINTS: Think of the
asked by beggginggg for help please !!!!!!!!!! on October 28, 2014 
Chemistry
A piece of metal A and a piece of metal B of the same mass and at the same temperature of 80°C are dropped into seperate beakers each containing 100.0 g of water at room temperature. Once they equilibrate, you find that the beaker with the sample of metal
asked by Tatiyana on October 16, 2017 
PHYSICS
dT/dz=−α for z≤11 km where α=6.5 K/km (Kelvin per km) and z is the height above the sea level. The temperature stays then approximately constant between 11 km and 20 km above sea level. Assume a temperature of 5 ∘C and a pressure of 1 atm at sea
asked by Anonymous on January 11, 2014 
Physics
dT/dz=−α for z≤11 km where α=6.5 K/km (Kelvin per km) and z is the height above the sea level. The temperature stays then approximately constant between 11 km and 20 km above sea level. Assume a temperature of 5 ∘C and a pressure of 1 atm at sea
asked by Anonymous on January 11, 2014 
chemistry
1)At room temperature (20 degree C), milk turns sour in about 64 hours. In a refrigerator at 3 degree C, milk can be stored three times as long before it sours. How long should it take milk to sour at 40 degree C (activation energy =44kj/mol)? 2)At what
asked by sue on February 3, 2009 
math 5th grade
The width of a picnic table is 3 times its length. If the length is 5 6 yd long, what is the area of the picnic table in square feet? sides are 2 1/2 yd and 5/6 yard. then to find area 2 1/2 x 5/6 = 2 5/12 y2 how do I find square feet?
asked by paul on May 5, 2016 
math
if you have a large cube with a surface area of 32 and a smaller cube with the surface area of 18 what would the ratio be for the smaller figure to the larger figure a)2:5 b)5:6 c)3:4 d)6:7
asked by ana on May 17, 2012 
math
if you have a large cube with a surface area of 32 and a smaller cube with the surface area of 18 what would the ratio be for the smaller figure to the larger figure a)2:5 b)5:6 c)3:4 d)6:7
asked by ana on May 17, 2012 
math
if you have a large cube with a surface area of 32 and a smaller cube with the surface area of 18 what would the ratio be for the smaller figure to the larger figure a)2:5 b)5:6 c)3:4 d)6:7
asked by ana on May 17, 2012 
AP Chemistry
Hey guys! I'm stuck on some study guide problems... (On the bottom of this, I put what answers make sense to me) A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is 1)nature of reactants 2)concentration of
asked by Allie on September 23, 2015 
English
 The Wheel Pose  Lie on your back on the floor. Bend your knees upward at a 45 degree angle. Place your hands next your head with your palms on the floor. Lift your hips with your head still on the floor. Keep your feet and knees straight as you push
asked by rfvv on May 7, 2016 
Calculus 1
The resistance of blood flow, R, in a blood vessel is dependent on the length of the blood vessel, the radius of the blood vessel, and the viscosity of the blood. This relationship is given by R = 8Lη/πr^4 where r is the radius, L is the length, and the
asked by Anonymous on October 28, 2014 
Calculus 1
The resistance of blood flow, R, in a blood vessel is dependent on the length of the blood vessel, the radius of the blood vessel, and the viscosity of the blood. This relationship is given by R = 8Lη/πr^4 where r is the radius, L is the length, and the
asked by Anonymous on October 28, 2014 
geometry
I need help. One diagram backward Z, has 2lines intersected by another line. The upper corner on left is 32 degrees. coming down intersecting line, the bottom
asked by robin on April 12, 2015 
math
The figure above consists of two equilateral triangles, one of which is inside the other. If the unshaded region within the larger triangle makes up 8/9 of that triangle's area, what is the ratio of the perimeter of the larger triangle to the perimeter of
asked by Sara on August 8, 2012 
physics
In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 13.0 oC. The temperature at the inside surface of the wall is 21.1 oC. The wall is 0.19 m thick and has an area of 8.3 m2. Assume that one kilowatt
asked by Redgy22 on November 30, 2012 
general chemistry
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7) which has a vapor pressure of 375.2 torr at room temperature, 20C. The volume of the flask is
asked by cinderrrr on November 22, 2011 
chemistry
A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the
asked by sargun on September 29, 2017 
Chemestry
A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume
asked by Monica on October 3, 2009 
Chemistry
A compressed gas cylinder contains 1.00 103 g of argon gas. The pressure inside the cylinder is 2096 psi (pounds per square inch) at a temperature of 19°C. How much gas remains in the cylinder if the pressure is decreased to 656 psi at a temperature of
asked by Elizabeth on February 9, 2012 
CHEM
A cylinder with a movable piston contains 2.00 of helium, , at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume
asked by Kara on October 24, 2008 
Fund of programming 1
Complete the following C++ program. The program should compute and output the Celsius value corresponding to the given Fahrenheit value. //************************************************ // Celsius program // This program outputs the Celsius temperature
asked by Anonymous on December 13, 2012 
algebra 1
The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at
asked by Simon on May 19, 2016 
algebra 1
The function H(t) = −16t^2 + 90t + 50 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in the air along a path represented by g(t) = 28 + 48.8t, where g(t) is the height, in feet, of the object from the ground at
asked by Simon on May 19, 2016 
Math
In a figure, the radius of the inner circle of the tire is twice the width of the tire itself. To the nearest integer, what percent of the entire area is the area of the tire? My teacher told me the answer is 56%, by rounding the 55.5555...., but I don't
asked by Jackson on October 10, 2015 
Physics
If the coefficients of static and kinetic friction between a 20 kg block that sits on top of a 100 kg block are both essentially the same value of 0.5, determine the acceleration of each block for a force pulling on A of 60 N. Bottom block sits on a
asked by OMG_Newton on August 8, 2014 
Physics
A boy stands on the edge of a building 7 meters high and throws a rock at 60degree angle. The release point from his hand is 1.6 meters above his feet(so the release point above the ground is 8.6 meters.) The rock lands on the ground 15 meters away from
asked by Anonymous on November 21, 2008 
Physics
The figure is just mass A on top of mass B. There are no forces or anything shown. Block A, of mass 3.2 kg, is on block B, of mass 7 kg, as shown in the above figure. The lower block is on a frictionless surface while the coefficient of static friction is
asked by Ana on March 12, 2017 
precalculus
Berry is standing at the edge of a hill that slopes downward and to the right. He notices that for every 5 feet you go in a horizontal direction, the hill drops by 2 feet. Berry places a ball at the edge of the hill (the origin of the coordinate system),
asked by Anonymous on June 10, 2013 
Calculus
The population of fish in a lake before mating season is F. During the mating season, the population grows by 30% and the new population is N. Write an expression for N is terms of F.
asked by Sandy on September 7, 2010 
math
overnight the low temperature dropped to 6 degrees Fahrenheit. If the high temperature during the day was 11 degrees Fahrenheit, what was the difference between the high and low temperatures? Please help, thank you so much!
asked by anon on December 26, 2014 
math please help
temperature before change = 40 degrees temperature change =up 7 degrees identify the number model below that is correct. then cross out the incorrect model and complete the correct one. 40+7=? or 40+(7)=?
asked by lily on February 16, 2011 
chemistry
A scuba diver takes a 2.3 L balloon from the surface, where the pressure is 0.90 atm and the temperature is 28 ∘C, to a depth of 20 m , where the pressure is 3.0 atm and the temperature is 15 ∘C. What is the volume of the balloon at this depth?
asked by Jacky on April 17, 2019 
Chemistry
94.0 g of a metal at 88.0°C are added to 55.0 g of water at 26.0°C. When the system reaches constant temperature, the temperature is 39.3°C. What is the specific heat of the metal? The specific heat of water is 4.184 J/g·°C.
asked by Megan on March 8, 2010 
Earth Science  NEED HELP QUICK
What is the thickness of the layer from 1000  850 mb if the mean temperature of the layer is 2 C? From what it says in my textbook it seems as if mb = hPa so all you do is 850  1000 = 150 hPa but I am pretty sure that is wrong because what do you do
asked by Sarah on November 21, 2014 
chemistry
A scuba diver takes a 2.8 L balloon from the surface where the pressure is 1.00 atm and the temperature is 34.0 °C to a depth of 25 m, where the pressure is 3.5 atm and the temperature is 18.0 °C. What is the volume of the balloon at this depth?
asked by Anonymous on December 5, 2011 
Chemistry (volume of gas)
A sample of argon at 2.0 atm pressure is heated until its temperature is raised from 60 °C to 90 °C. The pressure of the gas at this temperature is 3.0 atm and the volume is 4.4 L. What was the initial volume of the gas?
asked by Summer on March 15, 2018 
biology
Why all enzyme work well in their own optimum temperature and optimum pH ? i need more explanation about why different enzyme have different optimum temperature and different optimum pH to react. i hope to get a long explanation for my essay that contain 5
asked by kate on July 31, 2013 
5th grade math
Nora is making a donation box for her store. She wants to wrap a cardboard box with decorative paper. She is wrapping the sides and the bottom of the box and uses the expression below to find out how many square feet of paper she will need to buy. 4 x 3 x
asked by Eden S. on December 15, 2013 
Math
Just need some help. My teacher likes to throw in advice on each problem, but they confuse me more. On this one he said multiply by 3 since volume is given. I know my formula is V=1/3bh, but does his advice mean multiply the base ×3 and then plug in to my
asked by Dallas on March 19, 2018 
Calculus
What would the values of A, B, and C be in this problem? The tides in a particular bay can be modeled with an equation of the form d= A cos (Bt) + C, where t represents the number of hours since hightide and d represents the depth of water in the bay. The
asked by Jillian on August 22, 2012 
Calculus
Suppose a ladder of length 36 feet rests against a wall, and we pull the base of the ladder horizontally away from the wall. For a given distance x that we pull the ladder horizontally, let g(x) be the height of the ladder on the wall, under the assumption
asked by Anonymous on June 22, 2012 
Thermal physics
when breathing slowly a person inhales air at room temperature and exhales it at body temperature. We may assume that the lungs maintain ordinary atmospheric pressure as they expand. If a resting person inhales 0.6L of air at 24 degrees what volume does
asked by Kelly on June 23, 2010 
Chemistry
Nitrogen dioxide decomposes on heating according to the following equation 2NO2 (g) ↔ 2NO (g) + O2 (g) When 4 mole of nitrogen dioxide were put into a 1dm3 container and heated to a constant temperature, the equilibrium mixture contained 0.8 mole of
asked by Shahab Mirza on October 3, 2014 
statistics
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). Is a body temperature of 99.00 °F unusual? Why or why not?
asked by anonymous on April 2, 2010 
Geometry Multiple Choice Question Please Help!
Find the value of x. If necessary, round your answer to the nearest tenth. The figure is not drawn to scale. {THe figure is a circle with a tangent crossing through the top section of the circle. The value of the tangent is 12. There is a line
asked by LeXi;) on May 17, 2012 
rational expressions and equations
A carpenter is assigned the job of expanding a rectangular deck where the width is onefourth the length. The length of the deck is to be expanded by 6 feet, and the width by 2 feet. If the area of the new rectangular deck is 68 ft2 larger than the area of
asked by britney on July 28, 2017 
Math
A carpenter is assigned the job of expanding a rectangular deck where the width is onefourth the length. The length of the deck is to be expanded by 10 feet, and the width by 6 feet. If the area of the new rectangular deck is 128 ft^2 larger than the area
asked by Ally on July 17, 2015 
Algebra
Solve the equation w=Cr^2 for r. Is this right? w/C=r^2 r=sqrt(C/w) And if so, I still seem to be having troubles answering the next part. 2. Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true.
asked by Desparate for Help on February 5, 2011 
chem
Rank the size of a change in temperature of one degree Fahrenheit, one degree Celsius, and one kelvin. In other words, if a thermometer were to show that the temperature outside increased by these amounts, which change would feel the largest? If any of the
asked by Cf on September 16, 2013 
Physics
During an allnight cram session, a student heats up a 0.451 liter (0.451 x 10 3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 19.5 °C, and the beaker is filled to the brim. A short time later when the student returns, the
asked by Jena on November 17, 2006 
Statistics 2
The body temperature of healthy human beings can be assumed to have a normal distribution with mean and standard deviation . Body temperature measurements taken from a sample of 130 healthy individuals shows the sample mean temperature to be 98.249O
asked by Steven on December 16, 2013 
math can you please check my work
Can you please check my work. I asked this question yesterday but no one helped me. Thank you , I really appreciate it A hot air balloon was at a height of 60 feet above the ground when it began to ascend. The balloon climbed at a rate of 15 feet per
asked by B8 on December 17, 2013 
physics
In the figure below, 5.2 kg block A and 6.2 kg block B are connected by a string of negligible mass. Force A = (16 N) acts on block A; force B = (27 N) acts on block B. What is the tension in the string? (Express your answer in vector form.) To see the
asked by joy on February 26, 2018 
Physics
QUESTION: In the figure provided, a 2.83 kg textbook is connected by a string to a 0.970 kg cup. The textbook is pushed up a slope of 34.7° with an initial speed of 2.81 m/s. If the coefficients of friction are uk = 0.370 and Îus = 0.760 with the
asked by Haniah on November 2, 2016 
science/chemistry
The van der waals equation incorperates corrections for the ideal gas laws in order to account for the properties of real gases. one of the corrections accounts for 1:The kinetic energy being inversly proportional to the temperature 2:The possibility of
asked by Puzzled on May 10, 2010 
Social Studies
Hai I was wondering if you could check my answer? It doesn't really talk about this in my text book, and it doesn't really help if I look it up online. Q: Founded by the Mormons, which city was originally called Deseret? A. San Diego B. Provo C. Santa Fe
asked by SebbyChan on March 27, 2014 
Material Science
A polystyrene ice chest contains 3 kg of ice at 0 degrees Celsius. Triangle H for melting = 3.34 x 10 to the 5 power J/kg p = 1000 kg/m cubed, CP =4190 J/ (kg K). Heat transfer is limited by conduction (k=0.06W/m K)) from the outside wall at 30 degrees
asked by Joy on August 24, 2013 
CHEMISTRY HELP
help!!! arrange the following binary hydrides in order of increasing melting points CaH2, AIH3, NH3, GeH4, CH4 i don't understand how i cant figure it out I suggest the easy way is to look up the melting points of each and arrange them. The most covalent
asked by Robert R. on April 24, 2007 
com 140
on this chart i'm trying to figure out what is content and what is the purpose my situation is In this scenario, assume the role of a student. You have read assignment details in your course syllabus, but you are still unsure what to do. Think about how
asked by lynum on August 14, 2008 
algebra
To balance a seesaw, the distance, in feet, a person is from the fulcrum is inversely proportional to the person's weight, in pounds. Peter, who weighs 150 pounds, is sitting 3 feet away from the fulcrum. If Joey weighs 90 pounds, how far from the fulcrum
asked by Alice on April 7, 2013 
english
which one of the sentences uses but as a preposition? A I wanted to leave,but I was embaressed to do so. B The lake is pretty, but it's too cold for swimming. Neither of those sentences uses "but" as a preposition. In both it is used as a conjunction.
asked by Asia on September 28, 2006 
Physics
Some Carnot engine has an efficiency 0.700. The hot reservoir temperature is 900K. This means that the temperature of the cold reservoir is 270K. If the cold reservoir is dropped to 260K, the new efficiency is 0.701. If the output of the power is kept
asked by Daniel on April 26, 2011 
Chemistry Help.......
State the Le Chatelier's principle and explain the following i) The effect that incresing the pressure will have on the eaualibrium yield of methanol ii) The effect of increasing the temperature will have on the equalibrium yeild of methanol iii) The
asked by Lacey on March 12, 2007 
Physics
A certain type of ideal gas at pressure p0 is contained in a plugged flask of volume V initially at temperature T1. The environmental pressure remains constant p0. (A) As the flask is heated up to temperature T2, the plug pops out. What is the pressure p2
asked by Anon. on September 22, 2013 
Chemistry;HELP
1. What volume will a sample of hydrogen occupy at 128.0 oC if the gas occupies a volume of 2.23 dm3 at a temperature of 0.0 oC? Assume that the pressure remains constant. (remember to change to Kelvin). 2. If a gas occupies 1733 cm3 at 10.0 oC, at what
asked by Unknown on August 20, 2013 
Math
A ladder is leaning against a building so that the distance from the ground to the top of the ladder is 4 feet less than the length of the ladder. Find the length of the ladder if the distance from the bottom of the ladder to the building is 8 feet.
asked by Marcus on December 3, 2017 
Physics
At 30.0 m below the surface of the sea (density = 1025 kg/m3), where the temperature is 5.00°C, a diver exhales an air bubble having a volume of 0.80 cm3. If the surface temperature of the sea is 20.0°C, what is the volume of the bubble just before it
asked by jenn on January 19, 2010 
Physics/Chemistry
Two thin strips of metal are bolted together at one end and have the same temperature. One is steel, and the other is aluminum. The steel strip is 0.10% longer than the aluminum strip. By how much should the temperature of the strips be increased, so that
asked by Heather on February 15, 2011 
Science
From January to July, there is a smaller temperature change in the Southern Hemisphere than in the Northern Hemisphere.How does the Southern Hemisphere's large oceanwater surface cause this smaller temperature change?
asked by Angela on January 22, 2009 
Physics
Two thin strips of metal are bolted together at one end and have the same temperature. One is steel, and the other is aluminum. The steel strip is 0.10% longer than the aluminum strip. By how much should the temperature of the strips be increased, so that
asked by Heather on February 15, 2011 
PHYSICS
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 17 cm . You take the balloon in an airplane, where the pressure is 0.89 atm. If the temperature is unchanged, what's the balloon's new radius?
asked by lizbeth on March 31, 2016 
Chemistry
What is the difference between a forward and a reverse reaction? I am studying Lechatelier's principal and it states that with an increase in temperature it favors a reverse reaction and when the temperature decreases it favors a forward reaction. What
asked by Jaden on March 3, 2013 
Physics
A ball is shot vertically upward from the surface of another planet. A plot of y versus t for the ball is shown in the figure below, where y is the height of the ball above its starting point and t = 0 at the instance the ball is shot. The figure’s
asked by Vanessa on October 2, 2007 
chemistry repost
Still can't figure this one out sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^7 seconds Iodine combines to form I2 in liquid propane solvent with a
asked by Nancy on August 6, 2014 
Algebra
Manuel plans to install a fence around the perimeter of his yard. His yard is shaped like a square and has an area of 40,000 square feet. The company that he hires charges $2.50 per foot for the fencing and $50.00 for the installation fee. Write a
asked by Ana on October 19, 2016 
Help!Microeconomics
Central Crude Oil is a crude oil monopoly in a market. The following table shows the liner demand schedule of this firm which cannot apply price discrimination. The firm's fixed cost is $2000 per month and its marginal cost is a constant of $20 per
asked by Carina on November 20, 2016 
Math
Working on a problem and can't figure out how the book rearranged this problem to get the following: 0.76= x/0.0200x then, the book rearranged to solve for x... x= 0.0200 X 0.76/ 1.76 I don't understand how 1.76 was obtained? I see that you cross multiply
asked by Linda on February 10, 2013 
Chemistry
A balloon containing 0.600 mole of SO2 gas has a volume of 275 mL at a certain temperature and pressure. What volume, in milliliters, would a 0.765 mole sample of SO2 gas occupy at the same temperature and pressure conditions?
asked by Mindy on July 28, 2015 
CRC
A sample of ideal gas is in a sealed container. The pressure of the gas is 675torr , and the temperature is 28\, ^{\circ}C . If the temperature changes to 91\, ^{\circ}C with no change in volume or amount of gas, what is the new pressure, P_2, of the gas
asked by Touch on April 28, 2013 
physics
A rigid container holds hydrogen gas at a pressure of 3.0 atm and a temperature of 20 degrees Celsius. What will the pressure be if the temperature is lowered to 33 degrees Celsius? Please give your final answer in atm. Answer
asked by deena on March 8, 2013 
Physics
500 J of heat are added to 59 g of water initially at 20°C. (a) How much energy is this in calories? (b) What is the final temperature of the water? I know that to find (a) I have to use the constant 4.19 J and divide it into the 500 J yielding 119.33
asked by Mandi on April 27, 2012 
physics
Suppose that you want to freeze 1.2 kg of water for a party, and only have 10 minutes to do it. Relying on nothing but your keen physical abilities, a dixie cup, duct tape and a piece of string, you manage to build a refrigerator unit which can do the job.
asked by sarah on November 28, 2010 
college chemistry
Which is faster, a bullet with a velocity of 1100. feet per second, or Superman traveling at 1100. miles per hour? Provide the correct velocity for either Superman or the bullet in scientific notation with the correct number of sig figs. You must use the
asked by Mickelle on May 18, 2011 
Algebra
Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the
asked by T on December 2, 2010 
Chemisty !!
(a) Why do the densities of most liquids increase as they are cooled and solidified? How does water differ in this regard? (b) Rank the following compounds in order of decreasing surface tension at a given temperature, and explain your ranking. CH3CH3,
asked by Xiang ! on September 2, 2013 
physics
We start with 5.00 moles of an ideal monatomic gas with an initial temperature of 123C. The gas expands and, in the process, absorbs an amount of heat equal to 1300J and does an amount of work equal to 2040J. What is the final temperature of the gas? Use
asked by Annie on October 4, 2009 
chem
ok my professor lost me when explaining this material so please bare with me and help me step by step one of the questions is: after absorbing 1850J of energy as heat, the temperature of a .500kg block of copper is 37C what was its initial temperature
asked by cheryl on October 12, 2011 
Chemistry
The temperature of 100.0g of water initially at 25.0 degrees C in a calorimeter increases to 30.0 degrees C after adding a 20.0g piece of hot aluminum. What was the temperature of the aluminum before adding it to water? The specific heat of water and
asked by Jaclyn on February 22, 2011 
Physical Chemistry
One potential problem with using molarity to express concentration is that molarity is temperature dependent. If you make a 1.000 M solution of aqueous HCl at 25 degrees celsius, what would the molarity of this solution become if the temperature of the
asked by Matt on September 29, 2017 
Physics
Suppose 100 g of water at 20°C is poured over a 70g cube of ice with a temperature of 8°C. If all the ice melts, what is the final temperature of the water? If all of the ice does not melt, how much ice remains when the water–ice mixture reaches
asked by James on July 19, 2012 
Math
The formula s = the square root of 18d can be used to fnd the speed s of a car in miles per hour when the car needs d feet to come to a complete stop after slamming on the brakes. If it took a car 12 feet to come to a complete stop after slamming on the
asked by Jordan on September 27, 2012
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