Questions Asked on
January 13, 2013

AP Chem
MnS(s) + 2 H+ > Mn2+ + H2S(g) At 25 C the solubility product constant, Ksp, for MnS is 5 x 1015 and the acid dissociation constants K1 and K2 for H2S are 1 x 107 and 1 x 1013, respectively. What is the equilibrium constant for the reaction represented
asked by AL 
space science?
Which star is the densest: Antares, Spica, or Polaris?
asked by Anonymous 
chemistry
at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime
asked by david 
Physics
Two forces are applied to a car in an effort to accelerate it, as shown below. The first force, F1 = 364 N, is applied at an angle α = 33° to the forward dashed line. The second force, F2 = 522 N, is applied at an angle β = 11° to the forward dashed
asked by Davis Parker 
Physics
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal
asked by Emily 
maths
One type of lubricating oil weighs approximately 52 pounds per cubic foot, or 7 pounds per gallon. A 42gallon barrel will hold approximately how many cubic feet of such oil?
asked by Anonymous 
Physics.
A punter kicks a football at an angle of 45 degrees to the ground. The football has an initial velocity of 25 m/s, make a diagram and calculate: a) How long was the football in the air? b) How far does the football travel horizontally? c) What is the
asked by Noemi 
Chemistry
How do you write the chemical equation of the dissociation of nicotinic acid, C5H4NCOOH, in water?
asked by Alisha 
chemistry
Use the reaction shown to calculate the mass of iron that must be used to obtain 0.500 L of hydrogen at STP: 3Fe(s) + 4H2O(l) pr0291.jpg Fe3O4(s) + 4H2(g
asked by jason 
Chemistry
Which of the following solutions would have the highest osmotic pressure? 0.15 M KCl 0.2 M C6H12O6 0.2 M C12H22O11 0.2 M CH3COOH 0.15 M CaCl2
asked by Janet 
physics
a red blood cell travels at a speed of 40 cm/s in a large artery. a sound with a frequency of 100 kHz enters a blood opposite the direction flow. calculate the frequency of sound reflected from the cell and detected by a receiver. (v = 1500 m/s)
asked by aris 
science
Can somebody write an acrostic poem for the ELEMENT mercury?? Thank you very much
asked by leslie 
science
list two things that car manufacturers do to improve a car's efficiency
asked by max 
Geometry
If m< JKN = 8x + 2 and m< MKL = 3x + 5, what is m< MKN? I know the answer but can you give an explanation
asked by Zaria 
chemistry
A chemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements. The results are shown below: Sample Mass of Carbon Mass of Oxygen 1 6 8 2 12 16 3 18 24 Do you notice a pattern in these results? Next, the
asked by patrick 
earth
#37 whenever scientist carefully measure any quantity many times they expect that: a. all the measurements will be exactly the same b. only two of the measurements will be exactly the same c. all but one of the measurements will be exactly the same d. the
asked by ? 
physics
Suppose the charge q2 can be moved left or right along a line connecting charges q1 and q3. Given that q = +15 µC, find the distance from q1 where q2 experiences a net electrostatic force of zero? (The charges q1 and q3 are separated by a fixed distance
asked by stoicrider77 
math
Zaineb is deciding whether to buy a stereo at $695 plus GST and PST now, or to invest the money to buy the stereo in a year. Her account pays 7.35% per annum, compounded monthly. If she can buy the stereo at the same price next year, how much would she
asked by jessica 
Chemistry
In planning to administer a gaseous anesthetic to a patient, a. Why must the anesthesiologist take into account the fact that during surgery the gaseous anesthetic is used both at room (18 degrees C) and the patient's body temperature (37 degrees C)? The
asked by Sara 
physics
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m 0.75 m. The sound intensity level is 95 dB above the threshold of hearing. How much sound energy comes through the window in one hour?
asked by not sure 
science
you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?
asked by ricardo 
Physics
A coil of 50 turns has a crosssectional area of 4.2x10^3 m^2. It is placed at an angle to a uniform magnetic field of flux density 2.8 x 10^2 T, so that the angle = 50degrees. What is the change in flux linkage when the coil is rotated anticlockwise
asked by Amy 
physics
A collision occurs between two pucks on an airhockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. The collision is
asked by Miranda 
AP Chem
A valid Lewis structure of __________ cannot be drawn without violating the octet rule. Answer: BeH2 Why would BeH2 break the octet?
asked by Anon 
Math Please Help
A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should
asked by Barb 
physics
sphere A has a mass of 4.2*10^2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall
asked by josh 
Medical Coding
A 12yearold boy presents with his father to the ER due to open wounds to his arm' hand, and upper leg. The injury occurred when the boy fell on a barbedwire fence at the farm while running. Diagnosis: Multiple open wounds to the right forearm, right
asked by Julie 
Physics
In one cycle, an engine burning a mixture of air and methanol (methyl alcohol) absorbs 525 J and expels 413 J. How much work is done by this engine?
asked by please help 
Python programming
A standard problem in mathematics is to measure the area under a curve (or to integrate the function defining the curve). A simple way to do this is to approximate the area with a series of rectangles (whose areas are easy to compute). For example, we
asked by Anonymous 
Chemistry
The atomic number of an electrically neutral atom is equal to the number of: Choose all that apply. Neutrons Electrons Protons I chose Electrons but somehow my homework program is telling me it's wrong? I also tried checking all of them.
asked by Kyle 
Social Studies
"How was the freetrade trial of 1849 a victory for the Metis?" Was it because the 4 Metis offenders were given mercy and it also ended the HBC monopoly?
asked by Sophie 
Math
Mary is blowing up a birthday balloon.After the first breath, the balloon has a 5 cm diameter . the diameter increases at a constant rate of 20% each second. What is the diameter of the balloon after 3 seconds?
asked by boobies 
Chem 2
If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left
asked by Maggie 
physics
A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 188.0 N at an angle of 26° with the horizontal. The box has a mass of 30 kg, and the coefficient of kinetic friction between the box and
asked by Angel R. 
chemistry
at 20 C the vapor pressure of dry ice is 56.5 atm. if 32 g of dry ice is placed in an evacuated .25 l chamber at a constant temperature of 20 C will all the dry ice sublime
asked by david 
PHYSICS
WHEN SIX PEOPLE WHOSE AVERAGE MASS IS 84 KG SIT DOWN IN A CAR, THEY FIND THAT THE CAR DROPS .84 CM LOWER ON ITS SPRINGS. THEN THEY HAVE GET OUT OF THE CAR AND BOUNCE IT UP AND DOWN. THE ACCELERATION OF GRAVITY IS 9.8 M/S^2. WHAT IS THE FREQUENCY OF THE
asked by KOCHU 
mathsurgent
Suppose a+4b+9c+16d+25e=13, 4a+9b+16c +25d +36e =8, 9a+16b+25c+36d+49e=3, Find the value of 16a+25b+36c+49d+64e=?
asked by Anonymous 
physics
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner?
asked by adam 
Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied,
asked by I'm going to die please help 
Geometry
A triangular entraceway has walls with corner angles of 50, 70, 60. The designer wants to place a tall bronze sculpture on a round pedestal in a central location equidistant from the three walls. How can the designer find where to place the sculpture?
asked by Anna 
AP Chemistry
The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.
asked by koolchem 
Physics
A 1060 N crate is being pulled across a level floor by a force F of 300 N at an angle of 35° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the magnitude of the acceleration of the crate in m/s^2
asked by Alyssa Thompson 
CHEMISTRY...
1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)>CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be
asked by Anonymous 
AP Chemistry
The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS so there are two electrons not bonded so one pair?
asked by Anon 
physics
as light passes from air to water vi/vr=4/3 find the angle of incidence of a ray of light if the angle or refration is 25 degrees 40 minutes (i is the angle of incidence and r is the angle of refraction)
asked by merri 
PreCalculus
Point B is 12 km north of point A. Point C is 9 km from point B on a bearing of 060°. Find the distance from A to C.
asked by Gabby 
Geometry
An aircraft takes off and climbs at a constant 29 degree angle until it reaches and altitude of 6 miles. At that point, how far away is the plane from the airport?
asked by Imani 
Chemistry
at which temperature will water boil when the external pressure is 30 kPa?
asked by Anonymous 
Principles of Finance
Determine the size of the M1 money supply using the following information. Currency $700 billion Money market mutual funds $2,000 billion Demand deposits $300 billion Other checkable deposits $300 billion Traveler’s checks $10 billion
asked by Jason 
Chemistry
Solutions are made that contain 0.1 moles of each of the following compounds below in 100g of H20. Choose the compound whose solution will have the lowest freezing point? NaBr CO2 KClO3 MgCl2 MgSO4
asked by Janet 
chem
Which compound has a higher boiling point and why? a. PF3 b. PF5
asked by Jim 
Physics
A 4.2 kg rock is initially at rest at the top of a cliff. Assuming the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water, how high is the cliff if the temperature of 1.5 kg of water is raised
asked by I'm going to die please help 
AP Chemistry
The principal quantum number of the electrons that are lost when tungsten forms a cation is ? Tungsten is a transition metal.
asked by koolchem 
Machanics
An electron moving at a speed of 5 multiply by 10 raise to power six m/s was shot through a sheet of paper which is 2.1 multiply by 4cm thick.the electron emerges from the paper with a speed of 2 multiply by 10 raise to power six m/s,find the time taken by
asked by Anonymous 
Thermodynamic Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied,
asked by Kristal 
Chemistry
If a sample of gas is cooled at a constant pressure until it shrinks to onefourth its initial volume, what change in its kelvin temperature must have occurred?
asked by Sara 
math
A board is 244 inches long, is cut into pieces that are 7 5/8 inches long. How many pieces can be cut?
asked by Debra 
chemistry
which is more endothermic in water, ammonium chloride or potassium nitrate
asked by kelly 
biochemistry
A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink, and it was assumed no buffers were present. The sample
asked by stoicrider77 
physics
An athlete whirls a 6.6 kg hammer tied to the end of a 1.2 m chain in a horizontal circle. The hammer moves at the rate of 0.432 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.
asked by Emily 
Algebra
Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out
asked by Sara 
Algebra
Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out
asked by Sara 
science
Suppose you put your lunch up on a shelf. Name two kinds of energy it has, and explain why. I think it would have potential energy because it has stored energy being off the ground, but what other energy?
asked by maya 
physics
A 33.1 g ring that appears to be silver is heated to a temperature of 77°C, and then placed in a calorimeter containing 5.00 102 kg of water at 24.0°C. The calorimeter is not perfectly insulated, however, so that 0.14 kJ of energy is transferred by heat
asked by I'm going to die please help 
math
Find the LCM: z^414z^3+49z^2,3z^2147 and 5z+35
asked by Zachary Gellman 
Chemistry
Why is AgCl not soluble in nitric acid while Ag3PO4 is?
asked by Syra 
history
in what ways was the economy different in 1860 from what it had been in 1800? how would you explain those differences?
asked by Anonymous 
Grenada
John has a 25gallon fish tank. John filled his tank today with 23gallons of water. The water evaporates at a rate of 1.5 gallons per week. John adds 2 gallons to the tank every other week. At what following time will the tank contain 16.5 gallons?
asked by Daryl 
physics
A 3.40 kg block is pushed along the ceiling with an constant applied force of F = 82.0 N that acts at an angle θ = 50° with the horizontal. The block accelerates to the right at 5.80 m/s2. Determine the coefficient of kinetic friction between the block
asked by Elli Johnson 
maths
theatre sold the students tickets for Rs Rs3.25 and full price ticket Rs 5. on saturday 16 more fullprice ticket sold than student ticket .the total sales on that day was Rs 740. How many tickets sold ineach.
asked by Anonymous 
earth
#40 which type of rock is a result of a rock changing by heat and pressure? a. metamorphic rock b. igneous rock c. sedimentary rock d. metal ores
asked by ? 
CHM
As the number of solute particles in a given volume of solution increase will: freezing point increase, vapor press decrease? or vice versa or boiling point increase, vapor pressure decrease? or vice versa?
asked by Thomas 
social studies
2013 social studies fair project: A turn in history Walt Disney PreDraft Please
asked by Frank 
Chemistry
Why is AgCl not soluble in nitric acid while Ag3PO4 is?
asked by Syra 
physics
two forces of 5 N respectively act on an object.when will the resultant of the two vectors be at a maximum?
asked by katlego 
AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS so there are two electrons not bonded so one pair?
asked by koolchem 
GENERAL CHEMESTRY
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
asked by ROSE 
Physics
When one gallon of gasoline is burned in a car engine, 1.20 108 J of internal energy is released. Suppose that 0.99 108 J of this energy flows directly into the surroundings (engine block and exhaust system) in the form of heat. If 5.0 105 J of work is
asked by please help 
physics
The masses of the earth and moon are 5.98 × 1024 and 7.35 × 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on
asked by Anonymous 
mathsurgent
if xi 's are the mid points of the class interval of grouped data, fi 's are the corresponding frequinces and x^u is the mean, then (sum of) fi( xix^u) is?
asked by Anonymous 
Physics
A mass of 4.77 kg of chilled water at 0C is placed in a freezer which is kept at −19.2C. Approximately how much electric energy is needed to operate the compressor to cool this water to −19.2 C if the room temperature is maintained at 24.2C? The
asked by physicshelp 
Chemistry
H2O2 + Heat = H2O + O2 Would this be combustion or decomposition? Since the products are H2O and O2, I thought it would be combustion but then H2O can be decompose into H2O and O2 which would be decomposition.
asked by Shadow 
social studies
List three continents that are located in both the northern and western hemisphere?
asked by Sandy 
chemistry
A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 5.908×10−10 m. Determine the frequency (in hz) of the interacting photon.
asked by ouut! 
math
Solve for time. Principle  $400 / Int 5% / simple interest $100
asked by Anonymous 
Physics
A 4.90kg ball, moving to the right at a velocity of +2.50 m/s on a frictionless table, collides headon with a stationary 8.00kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 4.9kg ball = 8kg
asked by Miranda 
science
Can somebody write an acrostic poem for the ELEMENT mercury?? Thank you very much
asked by leslie 
math
I ONLY HAVE ONES AND TENTHS DIGITS. I AM LESS TAHN 9. ONE OF MY DIGITS IS 3 MORE THAN THE OTHER. WHAT NUMBER AM I?
asked by jericho 
Algebra
Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out
asked by Sara 
physics
A 200kg turtle running at a speed of .4m/s jumps onto a stationary skateboard that masses 3.6kg. the turtle slows to .2m/s by shooting the skateboard out from under him. how fast is the skateboard moving as a result?
asked by felipe 
Ethics and the Administration of Justice
Please Help!!!· In previous weeks, you examined the professional code of ethics for a field in criminal justice and analyzed ethical dilemmas for several fields. How does your code of ethics compare to the professional code of ethics? What are the
asked by Everett Douglas 
math
x=6y/58y3y+9y,what is the value of y in terms of x ?
asked by gary 
To Breanne
I responded to that chocolate milk/ice problem. Here is a link to it. http://www.jiskha.com/display.cgi?id=1357962576#1357962576.1358029768
asked by DrBob222 
history
did the industrial and market revolutions make america a more or less republican society? how so?
asked by Anonymous 
math
Kerry Stutsman has $500 in a saving account earning .45% interest. She is considering buying a 1year certificate of deposit (CD) that pays 3.25% interest. What will be the annual difference in her interest earnings between the savings account and the CD?
asked by Anonymous 
algebra
1.2X 10log6 by 1/16=
asked by Cameron 
Math
Plz cud sombdy show me long division method of x^4/(x1)(x^2+1)???? Plz note (x1)(x^2+1) is in the denominator.
asked by Abhishek 
chemistry
In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H2o2? The answer 3ml who helps
asked by Fai 
math
Describe how the slope of a line relates to a trend line.
asked by carly 
Analytic Geometry
A point is equidistant from (2,4) and (3,5). It is also equidistant from (2,3) and (6,1). Find the point Please I need Help with this
asked by Lance 
Chemistry
I need to write the total ionic equation for this equation. Copper(ii)sulfate + iron = iron(iii)+ copper. Won't it be Cu2+ + SO42 + Fe = Fe3+ + Cu ? The answer key say 3Cu2+ + 3SO42 + 2Fe = 2Fe3+ + 3SO42 + 3Cu Where did they get the sulfate for the
asked by Shadow 
Chemistry
Let say you were given this equation: NiBr2 + Co = Ni + CoBr2 How can you tell which is liquid,gas,solid,aqueous? Do you just use what you know and figure it out? Like since NiBr2 can be broken down because of the solubility rule, you can assume it aq then
asked by Shadow 
chemistry
– (b) Which are likely to have much lower critical micelle concentrations? (c) Which ... (e) You wish to use a solution of this surfactant in water to dissolve oil. Which region will be required to do this? (f) How much oil will dissolve in the
asked by Anonymous 
Math
Explain it How can you use a pattern to find the product of 5x12?
asked by Shaun 
Algebra
Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of the number of nickels and the number of quarters is three times the number of dimes. If the total value of the coins is $4.60, how many of each kind does she have? I can't figure out
asked by Sara 
algebra
an investor invested a total of $2100 in two mutal funds. one fund earned a 9% profit while the other earned a 7% profit.if the total profit was $161 how much was invested in each fund
asked by nic 
Earth Science
1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology
asked by Emma 
Math 9
use exponent rules to simplify. Write as a single power, don't need to find the value. [ (11/20)^4 x (11/20)^8]^5 and (11/20)^6 you cant leave an number to the power of a negative exponent. You have to change it like this ex : 2^3 = 1/2^3 = 1/8
asked by Molly 
physics
Two pieces of metal (A and B) are identical in every way, except that A has a much larger thermal expansion coefficient. If equal amounts of heat are added to both pieces of metal, which metal does more work on its surroundings? 1. A 2. B 3. They do the
asked by physicshelp 
physics
a block of ice released from rest at top of 400 m long ramp slides to the bottom in 2.20 seconds. what is the angle between the ramp and the horizontal
asked by flay 
put was or were in the space
Tom and Ben ( ) playing
asked by grammar 
physics
A 1.62 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.986 m, and the string can support a mass of 32.5 kg before breaking. The acceleration of gravity is 9.8 m/s 2 . What maximum speed can the
asked by Emily 
Math
A single card is drawn from a deck. Find the probability of selecting a 10 or a diamond.
asked by David 
accounting
a tabular analysis of the transactions made during august 2010 by witten company during its first month of operations is shown below each increase and decrease in stockholders' equity is explained.
asked by virginia 
physics
1. What are the examples of supersonic waves? 2. What is match cone, match no? 3. Define echo? 4. What is the effect of frequency on the velocity of sound in a gas? 5. Mathematical expression of beats. ''based on wave motion''
asked by edward 
earth
#10 which of the following is an effect of divergent plate movement? a.) glacial activity b.) mountain building d.) canyon erosion e.) sea floor spreading
asked by ? 
Math
Tom planted 81 plants in his garden at a total cost of $21.85. The 81 plants consisted of peppers at 20 cents each tomatoes at 35 cents each and eggplants at 30 cents each. If the total number of peppers and tomatoes was only half the number of eggplants,
asked by Kim 
math
invest 5% compounded semiannually I want to have 23,000 in the future how much I will deposit now to have that amount 5 years from now
asked by max 
Physics
A satellite moves in a circular orbit around the Earth at a speed of 5.4 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the
asked by Emily 
AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS so there are two electrons not bonded so one pair?
asked by koolchem 
enc1101
Correcting runon sentences 1. I had the opening part, I remember it like it was yesterday ”good afternoon everyone and welcome to the productions of ”What's the Meaning of Life”.” 2. I looked down at my costume and I love my little tutu my mom
asked by ally 
physics
A Hot Wheels car rolls off a table at a speed of 2.36 m/s and hits the floor a distance of 95.1 cm from the table's edge. Determine the height (in cm) of the table.
asked by Anonymous 
math
Phil is making a 40kilometer canoe trip. If he travels at 30 kilometers per hour for the first 10 kilometers, and then at 15 kilometers per hour for the rest of the trip, how many minutes more will it take him then if he travels the entire trip at 20
asked by Larry 
Liberal arts math
if this is the eaquation of a line y=2x+3 what is the parallel line and perpendicular line?
asked by Sarah 
physics
You kick a .3kg soccer ball at a 30deg. angle. your toe provides an average force of 50N for .5m. How far does the ball go?
asked by jim 
math
Jim spoke on the phone with all his friends last weekend.On Saturday he spoke for 3/8 of an hour and on Sunday he spoke for half an hour. During that time spent, he spoke to liam for 1/8 of an hour .What fraction of the time Jim spent talking with his
asked by jerry 
Chemistry
What is Mass % of an aqueous NaOH solution in which molality of NaOH is 16.7m? Density of the solution is 1.4339g/ml
asked by Janet 
CHM
Calculate the molecular weight of a small protein if a 0.32 g sample dissolved in 161 mL of H2O has an osmotic pressure of 9.0 mmHg at 25 degree celcius. (R=0.0821 L X atm/K X mol)
asked by Robby 
chemistry
How much oil will dissolve in the surfactantwater solution if the concentration of surfactant falls in region A?
asked by Anonymous 
Algebra
Factor the GCF out of 5x2  10x? I know I need to find the GCF of the coefficients but I need to write it using the distributive property. Help please?
asked by Bob 
chemistry
calculate the molarity of H2O2 if 25ml of H2O2 required 12 ml of 0.1M KMN04? The right answer 0.24M who helps
asked by Fai 
physicssss
Six grams of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 1.3 cm3 to 2393 cm3. The latent heat of vaporization of water is 2.26 × 106 J/kg. Find the work done. Answer in units of J Find the
asked by physicshelp 
Differential Equations!
I'm struggling solving this separable differential equations: (du/dv) = ((uv+u)/(uv+v)) I multiplied both sides by dv to get on the left side just du and cancel out dv, but after that don't know where to go. I've tried integration by parts but it doesn't
asked by Massiel 
Chemistry
I need to write the equation for the neutralization reaction of NaOH and nicotinic acid (C5H4NCOOH). Here is my attempt: C5H4NCOOH + NaOH → C5H4NCOONa + H2O First of all, is the formula for nicotinic acid correct? I am finding mixed answers when I search
asked by Alisha 
MathPlease Help
A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1inch squares from the corners and the middle sections folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should
asked by Barb 
math
Solve for time. Principle  $400 / Int 5% / simple interest $100
asked by Anonymous 
chemistry
The vacancy fraction of a particular metal is found to double as the temperature of the metal is increased from 700 degrees C to 850 degrees C. Calculate the enthalpy of vacancy formation for this metal. Express your answer in units of eV.
asked by jhony 
physics
A box slides down a 26° ramp with an acceleration of 1.19 m/s2. Determine the coefficient of kinetic friction between the box and the ramp. μk =
asked by Davis Parker 
science
1.2X 10log6 by 1/16=
asked by Cameron 
Python programming
Consider the following class definition: class Frob(object): def __init__(self, name): self.name = name self.before = None self.after = None def setBefore(self, before): self.before = before def setAfter(self, after): self.after = after def
asked by Anonymous 
Anthroplpogy
Political integration is common in chiefdoms. common in band societies. common in tribal societies. rare in commercial societies.
asked by Anonymous 
earth science
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
asked by ? 
Python programming
1,000 students took an online course. 1/4th of them were from Africa, 1/4th from Europe , 1/4th from South America, and 1/4th from Asia. At the end of the course, the instructor observed that of the top 100 grades, 30 belonged to students from a single
asked by Anonymous 
health
The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above
asked by sam 
earth science
#25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way
asked by ? 
earth science
#26 An inference is_____ A" using your sense to gather data B" a conclusion mad based on data C" a prediction about the results of an experiment D" a persons feeling or judgment about something
asked by ? 
earth science
which of the following element are found in the Earths crust? iron oxygen calcium all of the above
asked by ? 
Chemistry
How many moles are 400 g of Ca(HSO4)2
asked by Len 
math
Which is greater? $5.00 or the total value of all combinations of three coins you can make using only pennies, nickels, dimes, and quarters?
asked by Michael 
put was or were in the space
The girl has or have
asked by grammar 
earth science
#31 strike slips faults are most likely to occur along which type of plate boundary? a. convergent b. transform c. transcontinental d. divergent
asked by ? 
Biology
What will happen to the enzyme activity if both competetive and noncompetetive inhibitors appear at the same time together with substrates in a reaction? Which inhibitor will affect the rate of the reaction in more?
asked by Mengistu 
linear equations
theatre sold the students tickets for Rs Rs3.25 and full price ticket Rs 5. on saturday 16 more fullprice ticket sold than student ticket .the total sales on that day was Rs 740. How many tickets sold ineach.
asked by mala 
Biology
What will happen to the enzyme activity if both competetive and noncompetetive inhibitors appear at the same time together with substrates in a reaction? Which inhibitor will affect the rate of the reaction in more?
asked by Mengistu 
earth science
#33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because
asked by ? 
MATH!!!
how do I do 2(3g+2)=1/2(12g+8) ? is it possible?
asked by Emi 
social studies
what are the three examples of new campaining practices that resulted from the election of 1828
asked by jovanny 
Math
Plz cud sombdy show me long division method of x^4/(x1)(x^2+1)???? Plz note (x1)(x^2+1) is in the denominator.
asked by Abhishek 
chemistry
A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 1.828×10−10 m. Determine the frequency (in hz) of the interacting photon.
asked by ani 
Analytic Geometry
A point is equidistant from (2,4) and (3,5). It is also equidistant from (2,3) and (6,1). Find the point Please I need Help with this
asked by Lance 
chemistry
(b) If the diffusivity is observed to double when the temperature is increased by 10 degrees C, what is the activation energy for diffusion? Express your answer in units of eV.
asked by hr 
earth
#11 The state fossil of Nevada is the "Ichthyosaur", a dinosaur that lived in salt water. Why are so many of these fossils found in Nevada? a)lake mead once covered most of Nevada b)Nevada was once covered by oceans c)Ichthyosaur left the water to die
asked by ? 
math (urgent!)
I was given a graph and told to find an equation for the temperature T in terms of the time t in the form T(t) = a sin(ktc)+d where a, k, c and d are constants. The max was 32.9 and the min 21.1 I determined that amplitude = 5.9 vertical = 27 period =
asked by Anonymous 
CHEMISTRY
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of
asked by ani 
algebra
Andrea caught seven more fish than Micah. Micah caught twice as many as Peter. If they caught a total of 37 fish, how may did each catch?
asked by Wilton 
maths
rewrite the addition sum given below using digits. Each letter is used for a different digit. Answer the questions given below i) Which digit did you find first? ii) How did you find R and U? ........F.O.U.R ...........O.N.E ....T.H.R.E.E ....T.H.R.E.E
asked by manpreet 
Chemistry
Assume that the LHMP is enclosed in a transparent polymer stucture. a. How will the gases inside LHMP be affected by hot days and cool nights? b. What design features might be incorporated in the LHMP to reduce those heating and cooling effects? I know
asked by Sara 
chemistry
In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H202? The answer 3ml Who helps
asked by Fai 
math
The lengths of two sides of a parallelogram are 3 are 5. which of the following is a possible value for the length of a diagonal of the parallelogram? a.2 b.2 c.8 d.10 e.15
asked by john 
math
If one side of a triangle is of length x and another side is of length x+6,which of the following could not be the lenght of the third side? a.5 b.7 c.9 d.11 e.13
asked by john 
Physics
A dog is tugging forward on a leas held by a physics student who is standing still. The dog is tugging with a force of 63N. The student estimates the leash to be at an angle of 25 degrees above the ground. What is the tension in the leash?
asked by Randy 
Comprehension/reading
Dialogue: The new journalist is no longer deciding what the public should know. She is helping audiences make order out of it. This does not mean simply adding interpretation or analysis to news reporting. The first task of the new journalist/sense maker,
asked by Blaze 
science
you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?
asked by ricardo 
chemistry
At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.
asked by please check my ans.(744.18 hour).... 
math
If x=y+45+6,what is the value of y in terms of x?
asked by gary 
math
If x=y380,what is the value of y in terms of x ?
asked by gary 
MATH!!!
how do I do 3(d+12)=84d ? Please! need help!!!!
asked by Emi 
Science
What are functions of the pharynx, colon, caecum in a digestive system of a pig?
asked by Juanita 
Math
Howmany times do u multiply
asked by Sat 
MATH!!!
How do I do w3=w6 ? Is it possible?
asked by Emi 
Math
simplify by factors of 1: 1280v^6y^9/100v^3y^5
asked by Zachary Gellman 
math
If x=5y+23(y+2),what is the value of y in terms of x ?
asked by gary 
physics
A weightlifter is benchpressing 65kg. if at full extension the weight is .7m above his chest, then how much has he done after 10 repetitions (given that he simply lets the weights fall back down) if it takes 15 seconds?
asked by jona 
History
1.What was the new deal's legacy? 2. new measures were taken during the new deal and what agencies were formed?
asked by Alexander 
Mechanics
If a car moving at 180km/h redues to 72km,what is the percentage change in kinetic energy.
asked by Ayinde 
College Algebra
I need help factoring a problem and cant seem to get it right. The one I'm stumped on is 2x^2+7x+2. I have to compute as indicated and write final in the lowest terms. The whole problem is x^27x18/x^26x27*2x^2+7x+2/2x^2+5x+2
asked by Kristen 
math
my tens digit is 3 less than my hundredths digit. The difference between my tenths and hundredths digit is 5. The sum of my digits is 10. What number am I?
asked by jericho 
Precalculus
Find the correct end behavior for a given polynomial function. 3.36x^4+8x^2+x9
asked by Wilson 
Physics
How would I determine the height of a mountain if I am given direction cosines of vectors from two points on the base of the mountain to the peak?
asked by Briana 
us history
I am making a Civil War newspaper and had to pick 5 topics from a list. The problem I am having is what year to put on my paper, I first was putting June 1863, but then realized some of the events have taken place throughout the Civil War. What is the
asked by Fort 
history
a distinct american identity had begun to emerge by 1820. how would you desccribe this identity? What were the forces that helped create unity? And what were the points of contention?
asked by Anonymous 
Chemistry
I have all of the answers but this one so if anyone knows this answer, i can trade you :) I tried using the formulas that were posted but i ended up with a weird answer that didn't work.... A photon interacts with a ground state electron in a hydrogen atom
asked by Chemistry 
math
a cylindrical tank with diameter 2.0m and height 3.2m is to be filled with water. how many litres of water are needed to fill the tank? 100cm3 = 1L
asked by laf 
history
what was the impact of the economic revolution on the lives of women in various social groups
asked by Anonymous 
Social Studies
I've thought about this question for a long time and done some research but I still can't decide. Could someone please give me their opinions? "Was conflict over the Red River Settlement inevitable?" Thanks!
asked by Charlotte 
english poem
plz can anyone check my poem and mark my correct my mistakes. Lasts Forever once aparted, never met again never saw the wound heeling again once desired, beyond dreams no one i saw blessed anymore once hurtled, smashed from the roots never saw a tree
asked by Riana 
Python Programming
We have created a set of data values that sample a function y(x). The sample points are stored in two arrays: xVals and yVals. These represent measurements of a physical process that is subject to noise so that if a is the i'th entry of xVals (i.e. a =
asked by Anonymous 
math
5(3x+2)+2(3x+2)
asked by andrea 
Math
Simplify the rational expression 2x^3x^26x ➗2x^27x+6 Pls show steps I want to understand thank u!
asked by Lady gaga 
math
I have a board 18" x 18" x 1/8" I need to support it in an upright position at a 15 degree angle. How big must the base of support be to keep it from falling over.
asked by Anna 
Chemistry
In a distillation column, is it possible to achieve 100% or complete separation of the components (assuming they do not form azeotrope)?
asked by Namie 
midterm review scavenger hunt funsheet
water moves in bursts
asked by sasha 
balaji pharmacy clg ,science
why it is taken 85ml of hcl for 1 lt of solvent according to I.P. while it is 43.02ml of hcl when it is calculated?
asked by shaziya 
MathPlease Help
A pizza bx with a square base is to be made from a rectangular sheet of cardboard by cutting six 1inch square from the corners and the middle sections and folding up the sides. If the area of the base is to be 144 in^2, what size piece of cardboard should
asked by Barb 
balaji pharmacy clg ,science
why it is taken 85ml of hcl for 1 lt of solvent according to I.P. while it is 43.02ml of hcl when it is calculated?
asked by shaziya 
chemistry
What is the molarity of an HCl solution if 38.5 mL of it is titrated to the equivalence point with 41.6 mL of a 1.41 M NaOH solution?
asked by Megan 
Math
Plz cud sombdy show me long division method of x^4/(x1)(x^2+1)???? Plz note (x1)(x^2+1) is in the denominator.
asked by Abhishek 
Chemistry
Name this compound: H2O2
asked by Anonymous 
earth
#39 magma is a result of what process? a. cementation b. crystallization c. melting d. metamorphism
asked by ? 
Hard math
2x^3x^26x __________ 2x^27x+6
asked by James 
chemistry
The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The xray diffraction pattern of aluminum is measured in a diffractometer with Fe k alpha radiation. At what angle,a , do you expect to observe the first
asked by hr 
physics
what is the refrevtion of waves? And what are the laws'of refraction? Also about phase change.
asked by edward 
earth
#15 The primary cause of crustal movement is_________ a.) conduction b.) convection c.) magnetism d.) radiation please help have no idea
asked by ? 
earth
#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
asked by ? 
Remainder Theorem
Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is 2. Find a and b. (4 marks)
asked by Anonymous 
Math help pls
X^2  Y^2 __________ X^1 + Y1
asked by Joanne 
earth
#25 seismic waves are similar to sound waves because_______ a/ both are produced by vibrations b/ both are caused by humans c/ they are both produced by radiation d/ seismic waves and sound waves are not similar in any way
asked by ? 
math
1. x=3y2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?
asked by gary 
Physics
Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.
asked by Lisa 
Physics
Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.
asked by Lisa 
Physics
A car with a mass of 1815 kg is traveling down a road for 50 meters. It takes the car five seconds to travel this distance. Calculate the velocity, momentum, and kinetic energy of the car.
asked by Eliza 
physics
Given three vectors a~=Ài~À4j~+2k~ , b~=3i~+2j~À2k~ , c~=2i~À3j~+k~ , calculate a~Á(b~c~)
asked by Anonymous 
Math
The height from the ground to the top of a tire on a chold's bike is 42 cm. What's the distance the bike travels for one revolution of the tire?
asked by Me(: 
economics
Mary earns $100/day at a flower shop. She will take 2 days off without pay to attend an out of town wedding. Transportation will cost $180 round trip. Hotel $99/day for 2 nights. What is the opprotunity cost?
asked by d 
maths
How many minutes before 1:00 pm was 88minutes ago 3 times the minutes after 10:00 am
asked by Anonymous 
Physics
What will happen if you try to place two bar magnets of exactly equal size one above the other such that their north poles are on the same side
asked by vishnu 
AP Chemistry
The Lewis structure of shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS so there are two electrons not bonded so one pair?
asked by koolchem 
earth
#33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because
asked by ? 
algebra
Hi I need a formula for the following word problem. The cost of a cellphone has increased by 400% over 10 years. Does this correspond to a decrease of 4 times its cost?
asked by Babs 
maths
35 +29=8x
asked by jillyann 
Math
2x^3x^26x / 2x^27x+6
asked by Justin 
government
What does this statement means? He believed that political liberty threatened the efficiency of the stare with anarchy.
asked by Lucy 
math
what 2 numbers has a sum of 15 and a product of 56
asked by che 
Physics
The crate, m=68kg, is pushed up an incline, θ=24degrees, at a constant velocity with Fp=500N. μk=?
asked by Charlie 
Information Technology
Write a C program computing the interest of $100 invested at different rates of interest.
asked by Nia 
chemistry
At temperatures above 930 ∘C, PbO reduces PbS to form metallic lead (Pb). The byproduct of the reaction is SO2. Calculate the amount of lead produced (in kg) when a reactor is charged with 887.0 kg of PbS and 1330 kg of PbO.
asked by pls check it..urgent(limiting reagent) 
algebra and trigonometry
Where can I find a complete drawing of the unit circle
asked by Anonymous 
mathsurgent
rewrite the addition sum given below using digits. Each letter is used for a different digit. Answer the questions given below i) Which digit did you find first? ii) How did you find R and U? ........F.O.U.R ...........O.N.E ....T.H.R.E.E ....T.H.R.E.E
asked by manpreet 
math
Base is 16 cm squared, Width is 2.5 cm. what is the perimeter and height
asked by donna 
Maths
1) In a sale a coat costing £45.90 is reduced by 35%. What is the new cost of the coat? How much was saved in the sale?
asked by Israa 
Science
Could anyone link or tell me why does oxygen ignite at high temperature? Thanks
asked by Shadow 
Drivers Ed?
I just got my driving book, and I want to know... All this stuff about the different classes of licenses...is that something I'll need to know for the written test? Because its making no sense to me.
asked by Michael 
Math
What factors will give a product of 42? Show your work with repeated addition and with equal groups
asked by Nick 
Math
howmany?
asked by math 
Chem 2
What are some precipitates that affect our bodies
asked by Cassidy 
anthropology
States have of all of the following except
asked by Anonymous 
Physics
I just have a question....How to know if the volt is ve or not? and How to know if a charge has deficit or excess electrons ?
asked by Jiskha 
pre algebra
hi i need some help
asked by john 
Mary
Can someone please tell me the heat of fusion for Lauric Acid, Oxalic Acid, and Cetyl Alcohol? I've looked and can't find them anywhere! Thanks!
asked by Chemistry 
chemistry
What is the kd of ethanoic acid between isobitanol and water?
asked by cyprian 
MATH!!!
is w+3=w+6 possible? I don't know how to do this...
asked by Emi 
math
steve, i still have two question I don't understand. 1. x=3y2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?
asked by gary 
math
steve, i still have two question I don't understand. 1. x=3y2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?
asked by gary 
chamistry
The vacancy fraction of a particular metal is found to double as the temperature of the metal is increased from 700 degrees C to 850 degrees C. Calculate the enthalpy of vacancy formation for this metal. Express your answer in units of eV.
asked by jhony 
Math high school
Find the slope of altitude to line AT the coordinates are A(7,0) and T (9,7)
asked by Sue 
Math
Please factor 2x^2xyy^2 Briefly explain steps
asked by Justin