Questions Asked on
December 13, 2015

AP Chemistry
Calculate the delta H rxn for the following reaction: CH4(g)+4Cl2(g)>CCl4(g)+4HCl Use the following reactions and given delta H's: 1) C(s)+2H2(g)>CH4(g) delta H= 74.6 kJ 2) C(s)+2Cl2(g)>CCl4(g) delta H= 95.7 kJ 3) H2(g)+Cl2(g)>2HCl(g) delta H=
asked by Caitlyn 
science
Tow masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other?
asked by james 
Physics
A missile of mass 1.20 102 kg is fired from a plane of mass 5.10 103 kg initially moving at a speed of 3.35 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane? HELP I have no idea how to do
asked by Physics nerd 
english
1.Which literary device is used in the following sentence? According to that report, these special materials can bend "radar light, or other waves around an object like water flowing around a smooth rock in a stream." A.simile B.metaphor C.alliteration
asked by GummyBears 
english
1.which line from the poem "Briches" best develops it's nostalgic tone? A."And so I dream of going back to be." B."When I see birches bend to left and right" C."Where your face burns and tickles with the cobwebs" D."Soon the sun's warmth makes them shed
asked by GummyBears 
english
1.A flashback is A.an indirect comparison of two unlike things. B.a major problem around which a story is built. C.the place and time during which a story takes place. D.a memory sequence that interrupts the chronological order of events 2.Identify the
asked by GummyBears 
english
1.Choose the term that best describe the underlined phrase. (This is a battle) about which little is known. A.noun clause B.adverb clause C.adjective clause D.independent clause I think the answer is A because my two opinions is between A and D. please
asked by GummyBears 
maths
The halflife of lead is 22 years. How long will it take for a sample of this substance to decay to 80% of its original amount
asked by Anonymous 
Math
The length of a dog on a scale drawing is 9 cm. if the scale is 1 cm:6 cm, what is the actual length of the dog? A: 15cm B: 30 cm C: 54 cm ( I CHOOSE THIS) D: 108 cm
asked by MATH HELP FAST PLS 
Physics
Starting from rest, a 10.0 Kg suitcase slides down a 3.00m long ramp inclined at 30.0 degrees from the floor. The coefficient of friction between the suitcase and ramp is .35. A: what net force is applied to suitcase while it is on the ramp? B: what is the
asked by Harris 
Trigonometry
A cat, sitting on top of a tree, spots a dog and a firefighter, both on flat ground below. From the cat's point of view, the dog is 10m south, at an angle of depression of 65 degrees, and the firefighter is some distance east of the tree, at an angle of
asked by Alexis 
physics
Starting from rest, a 10kg suitcase slides down a 3.00m long ramp inclined at 30 degrees from the floor. The coefficient of friction between the suitcase and the ramp is 0.35. 1) what net force is applied to the suitcase while it is on the ramp? 2)what is
asked by jared 
physics
A heavy box is pulled across a wooden floor with a rope. The rope forms an angle of 60.0o with the floor. A tension of 80.0N is maintained on the rope. What are the horizontal and vertical components of the force?
asked by km 
Education and technology
1. What function would you use to find the mean in a microsoft(R) excel document a=ROUND b=AVERAGE c=SUM d=HYPERLINK 2. What is the first thing you should do to find the mean and range of data? a=put the numbers in order from least to greatest b=count the
asked by TigerMgant 
Math
Select the answer that correctly orders the set of numbers from greatest to least. 15%, 1/8, 0.2, 0.09 A: 0.2, 15%, 1/8, 0.09 B:15%, 1/8, 0.2, 0.09 (I CHOOSE THIS) C:0.2, 1/8, 15%, 0.09 D:0.09, 1/8, 15%, 0.2
asked by Math help fast 
math
Find the amount of interest on a loan of $10,500, at 9% interest, for 124 days using the exact interest method.
asked by Brenda 
Physis
The question: You are standing on a large sheet of frictionless ice and holding a large rock. In order to get off the ice, you throw the rock so it has velocity 11.9 m/s relative to the earth at an angle of 36.8∘ above the horizontal. If your mass is
asked by RK 
Math
The monthly loan payment was calculated at 119 payments of $348.33 plus a final payment of $347.54. Loan Balance: $30,000.00 Loan Interest Rate: 7.00% Monthly Loan Payment: $348.33 Number of Payments: 120 Cumulative Payments: $41,798.81 Total Interest
asked by Layla 
physics
A 2,200kg car moving east at 10.0 m/s collides with a 3,000kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35.0° north of east and at a speed of 5.16 m/s. Find the speed of the 3,000kg car before the
asked by king 
Physics
A 22kg child on a 1.75m long swing is released from rest when the swing supports make an angle of 35 degrees with the vertical. 1.What is the child's maximum potential energy? 2.Disregarding friction, find the child's theoretical speed at the lowest point.
asked by Carter 
Physics Help
A projectile is fired at an upward angle of 60 degrees with a speed of 100m/s. It lands on a plateau 150m higher. What is the projectile's speed the moment before it strikes the plateau? I'm thinking to just use the kinematic equation Vf^2= Vi^2 + 2aΔy.
asked by George 
Children Development
The name and contact information of a translation service for families whose home language is other than English as well a service that provides American Sign Language Translation? I need help find a website for this two things?
asked by Anonymous 
Math
Which of the following are equivalent to 85%? Choose all that apply. A: 0.085 B: 0.85 (I CHOOSE THIS) C: 85/100(I CHOOSE THIS) D: 19/20
asked by MATH HELP FAST PLS 
Physics
A 0.01 kg Styrofoam ball is released from rest 2m above the floor. It reaches a speed of 3m/s the moment before it hits the floor. How much heat due to air resistance is generated during this process?
asked by John 
science
find the distance covered when speed is 960 km/hr and time is 1hr 50min.
asked by maha 
FINAN & QUANTITATIVE LITERACY
Your current cell phone company charges $30 per month for unlimited minutes. Another company charges $20 per month for the first 500 minutes plus 5¢ a minute for any additional minutes. Should you keep your current service or switch to the other company?
asked by Naomi 
Math
A section in a stadium has 20 seats in the first row, 23 seats in the second row, increasing by 3 seats each row for a total of 38 rows. How many seats are in this section of the stadium? Please explain using words, numbers, and formulas.
asked by Dee 
Chemistry
How many calcium atoms are in a formula unit of calcium hydrogen carbonate? 1. 1 2. 2 3. 4 4. 3 5. 5
asked by C 
Chemistry
How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?
asked by Aaron 
Physics
Bill is moving a crate of mass 35 kg up a ramp that forms a 25 degree angle with the horizontal to a height of 5 m. A) If the ramp is frictionless, how much work must Bill do in pushing the crate to the top? B) How much work does gravity do as Bill pushes
asked by Joseph 
physics
a dockworker applies a constant horizontal force of 80 N to a block of ice on a smooth horizontal floor. The friction force is negligible the block start from rest and move 11m in 5 sec what is it mass & if worker stop pushing at 5sec .How for does the
asked by muqadir 
Physics
A projectile with a mass of 2.50 kg is shot horizontally from a height of 15.0 m above a flat surface. The projectile's initial speed is 22 m/s. 1.How much mechanical energy does the projectile have initially ? 2.How much work is done on the projectile by
asked by Marcus 
FINAN & QUANTITATIVE LITERACY
You currently drive 288 miles per week in a car that gets 24 miles per gallon of gas. You are considering buying a new fuelefficient car for $15,000 (after tradein on your current car) that gets 48 miles per gallon. Insurance premiums for the new and old
asked by Naomi 
B/dar
A car of mass 800kg gose round a corner of radius 65m at a speed 10 m/s what size force is needed to achive this?
asked by Zelie 
statistics
A shipment of 50 parts contains 12 defective parts. Suppose 3 parts are selected at random, without replacement, from the shipment. What is the probability that all 3 parts are defective?
asked by blah 
Math
Which pair of ratios can form a true proportion? A: 7/4,21/12 (I CHOOSE THIS) B: 6/3,5/6 C: 7/10,6/7 D: 3/5,7/12 Pls help
asked by MATH HELP FAST PLS 
St.martins
Olaf keeps running around the track unil he has run 0.9km in total. The track is 150m long. How many times does he run around the track?
asked by Izzy 
Physics (angle Vector)
You have a boat that is capable of moving at 11.8 m/s through still water. You wish to cross a river that flows due south at 5.4 m/s. At what numerical compass heading must you pilot your boat so that you will reach a destination that is due east of your
asked by Aubin 
physics
the height of the mercury in the glass tube thermometer when in melting ice and then steam are 3 cm and 18 cm respectively
asked by mercy 
math
. A deposit of 7,500 earns 3,900 over a period of 8 years. What is thw simple interest rate?
asked by mary 
physics
A golf ball of mass m = 0.12 kg is dropped from a height h. It interacts with the floor for t = 0.14 s, and applies a force of F = 10.5 N to the floor when it elastically collides with it.
asked by susie 
Biology
3grams of ammonium chloride has been added to 20mL of water. The initial temperature of the solutionis 18.0 degrees, and once the ammonium is added to the water, the temperature declines to 11 degrees. Given the following information, calculate the
asked by Adeline 
PreCalc, please a.s.a.p!!
A projectile propelled straight upward from the ground is modeled by the function d(t)=16t^2+304t. a) At what time does the projectile reach maximum height? b) What is the maximum height? c) At what times is the projectile more than 500 feet above the
asked by Sumejja 
stat
A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the
asked by Joe 
math
the area of rectangular plot of land fenced all round is 2000 sq. yards and the total length of fencing 180 yards. find the length and width of plot.
asked by kashif 
Beacon house
How can the number 39 be divided into two parts in order that the sum of 2/3 of one part and 3/4 of the other part is 28?
asked by Alpha 
Math
Free fall equation is s=6.1t^2 ft, where t is in seconds. Assume a rock is dropped from a 100 ft cliff. Find speed of the rock at t=3.5 sec.
asked by Beth 
Physics
A baseball catcher moves his glove away from a 40.5 m/s fastball as he catches it. If the average force he exerts on the ball is 1.01 103 N, how far does the glove move? Assume constant deceleration of the ball, which has a mass of 0.144 kg. I don't know
asked by Mohammad 
Physics
A 810.0 kg pink grapefruit is accelerated horizontally from rest to velocity of 11.0 m/s in 5.00 seconds by horizontal force. How much work is done on the pink grapefruit assume no function?
asked by . 
stat
A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the
asked by Joe 
Biology
What is the end result of the cell cycle and mitosis? Are daughter cells identical
asked by Anonymous 
Physic
Two gliders with masses m1 = 0.200 kg and m2 = 0.300 kg are held stationary on an airtrack with compressed spring in between. The gliders are then released and the spring pushes them apart. If m1 moves at 3.00 m/s right after it is released, nd the
asked by Yin 
Biology
How do changes in DNA affect changes in adaptations? (I am of the assumption that changes in DNA spur the adaptations that take placeat least those through genetic mutationand thus the adaptations that are most beneficial prevail. May I please have
asked by Samantha 
Math
You plant a 4 foot maple tree that grows at a rate of 6 inches per year and a 2 foot birch tree grows at a rate of 8 inches per year . In how many years after planting will the two trees be the same height? How tall will each tree be?
asked by Tina 
Science
If a piece of paraffin wax has a mass of 900g and density of 9g/cm3, if the wax was melted to the liquid state approximately what would its volume be?? HELP PLEASE!!!
asked by Denis 
Biology
As you go up the energy pyramid __% of the energy is loss at each level and only __% remainds. In what form is this energy lost as? ___ First blank 10%
asked by Anonymous 
Inequalities
Write two different inequalities that you can solve by adding 5 and multiplying by 3.
asked by Student 
Math
A contractor buys 14 yd of nylon carpet and 20 yd of wool carpet for $1738. A second purchase, at the same prices, includes 16 yd of nylon carpet and 25 yd of wool carpet for $2102. Find the cost per yard of the wool carpet.
asked by Sarah 
Biology
The endocrine system a. affects only the reproductive system b. releases hormones into the bloodstream c. competes with the nervous system d. is made up primarily of glands with ducts I chose d. Is this correct? I want to make sure.
asked by Peeps (BtsArmy) 
Healthcare finance
Lansing Surgical Supplies Inc, sells on terms of 2/10, net 30. Gross sales for the year are 1.3 million and the collections department estimates that 30 percent of the customers pay on the tenth day and take discounts, 40 percent pay on the thirtieth day,
asked by Robyn 
Conexus 8 math test
What are the answers
asked by Not Zachary buttner 
stat
While technology or a tdistribution Distribution Table can be used to find the area, in this problem, technology will be used. Find the Pvalue associated with t t0equals=1.34 and 19 degrees of freedom, rounding to three decimal places. Can
asked by Justin 
Physics
A tennis ball initially moves with a velocity of 27.0 m/s horizontally to the right. A tennis racket strikes the ball, giving it a velocity of 27.0 m/s to the left. Treat the collision as elastic and the ball and racket as particles of mass 0.0580 kg and
asked by Physics idiot 
Solid mensuration
The area of a segment of a circle is 330 square meter. If the longest chord of the segment is 57 meter,find its radius.
asked by Anonymous 
Math
1. Use MATLAB Optimization Tool to solve the following problem: minimize [2x1^2+2x1x2+x2^210x110x2] subject to [x1^2+x2^2≤500] and [5x1x2 ≤ 4] . 2. Please handcheck all the KuhnTucker conditions for your answer.
asked by Jiya 
chemistry
If a solution of barium hydroxide contains 9.1x1025 hydroxide ions, how many grams of barium hydroxide were originally dissolved?
asked by Anonymous 
Physics
A fire hose ejects a stream of water at an angle of 35.8 ° above the horizontal. The water leaves the nozzle with a speed of 21.9 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the
asked by Nicole 
English
Use their, there, they're 1. But _________ pleading wore me down, and it was raining, so I agreed. 2. _________ are only two blank tiles, and I got them both! 3. They kept trying to sneak _________ hands into the tile bag for new ones. 4. _________ is not
asked by Hayden 
Calculus
A spherical balloon is being inflated so that, at the time when the radius is 5m, the radius is increasing at the rate of 0.15m/s. (A) Find the rate of increase of the volume at this time. (B) If the rate of increase of volume thereafter remains constant,
asked by John 
math
A health food store sells a mixture of raisins and roasted nuts. Raisins sell for $4.00/kg and nuts sell for $6.00/kg. How many kilograms of each should be mixed to make 40 kg of this snack worth $4.75/kg?
asked by Emily Pearl 
burke county middle school
A deposit of 7,500 earns 3,900 over a period of 8 years. What is the simple interest rate?
asked by mary 
French
Please check this sentence! Quand tu dînes au restaurant,quelle repas préfèrestu manger?
asked by Cosette 
Algebra I
You have decided to try and convince your parents to let you get your own cell phone. After finding out that the flat monthly rate for unlimited minutes $35.00, which you can afford, you offer to pay the cost yourself. However, just before you place your
asked by Jerry 
accounting
Walk talk manufacture a cordless telephone system . At the beginning of the financial year ending 30 Nov 2009 , the firm budgeted to make and sell 50,000 units of its only product , the NOVA at the selling price of 30 $ per unit . other budgeted
asked by imad 
Physics
A 2kg small block is dropped from rest. The spring has a constant k = 500N/m. If the entire track is frictionless except for the 1m between points B and C, where the coefficient of kinetic friction is 0.15, find he maximum compression of the spring.
asked by Adam 
math
the sum total of the ages of the son and his father is 58 years.if 7 years after the ratio of the ages of the son and father will be 1:3,then what is the age of son now?
asked by haradhan 
History
how long can the treasurer of the united states serve?
asked by Steve 
cda
I need help with this? Summaries of the legal requirements in your stage regarding child abuse and neglect include contact information for the appropriate agency in your state and mandatory reporting guidelines? I live indiana.
asked by Anonymous 
science
If the temperature of 0.20 kg of gold, which has a specific heat of 130 J/kg • °C, increases by 25°C, how much energy has been transferred to the gold by heat?
asked by Nana 
Physics
A 600 N skydiver in free fall is accelerating at 7.6 m/s^2 rather than 9.8 m/s^2 because of the force of air resistance. How much drag force is acting on the skydiver? a)58.2 b)65.3 c)61.4 d)40.2 I use the equation Σ(F)verticalma=0 To find m I did:
asked by I attemptedHELP 
math
on office equipment sales representative earns a weekly salary and commission on his sales. one week his total compensation on sales of $7000 was $700, the next week his total compensation on sales of $8000 was $740, find the weekly salary and commission
asked by dave 
CHEMISTRY
what is the percent by mass of solution (d =1,3g/ml) of urea ((NH2)2CO) with molarity 8,4mol/l?
asked by EDWARD,ESOBUNETA 
Math
Cristel is five years younger than Monica. After 4 years, the sum of their ages is 27. How old are they now?
asked by Frey 
Physics
Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg
asked by Alexandra 
Physics
Light of wavelength 550 nm strikes a single slit of width 1.00 x 105 m that is 100.0 cm away from a screen. The screen is 36 cm wide, with the central maximum falling exactly at its centre. How many dark fringes in total will be seen on the screen ? Count
asked by Anonymous 
math
Four years from now Emily will be as old as Cathy is now. Seven years ago, the sum of their ages was 22. Write a system of equations to model this situation and solve it using substitution to determine how old the girls are now.
asked by jordan 
Math
Betty is supposed to work the same number of hours each week. One week, she worked 42 hours the first week and 34 hours the second week, how many hours is Betty supposed to work?
asked by Marty 
English
Tyler said there/their/they’re are four kittens sleeping in a box under the porch. their
asked by Hayden 
probability distribution
A bag contains Six blue and 4 red balls ,3 balls are drawn at random with replacement what is expected no of red balls that can be drawn?
asked by math 
Math
graph is a piecewise; f(x)= 1) 22xx^2, x=0. Determine whether graph has a tangent at x=o. If it does not, explain why not. I have no idea. When I plug in x=0, both equations give 2, but answer key says it does not exist. Explain?
asked by Beth 
Tilili
Let Vector "A" Cross With Vector "B" Equal To Ten,then Find (A+B) Cross With (AB) ?
asked by Dereje 
Discrete Mathematics. Need Help
Let A be the set of all ordered pairs of positive integers and R be the relation defined on A where (a,b)R(c,d) means that ba=dc. a)Show that R is an equivalence relation. b)Find [(3, 5)] and [(7, 1)].
asked by Aley 
Structures
A wood column is 5.5 in. square in cross section and 12 ft long. Its modulus of elasticity is 1.3 × 106 psi. How much will the column shorten under a compressive load of 36,000 lb?
asked by Jane 
Chem
would 0.360 mol of hydrochloric acid be sufficient to react with 10.0 g ferric oxide?
asked by Emili 
physics
Jake needs to catch 1 10 pound fish to last 5 days. He catches 2 3.33 pound fish, 1 2.11 pound, and 1 1 pound fish. How long will he survive with that amount of food?
asked by Joe 
algebra
School play tickets are $5.00 for none students and $3.00 for students. 937 ticket were sold for $3943.00 How many student tickets were sold and how many none student tickets were sold ?
asked by B 
Physics
4) if the speed limit on highways changed from 100 km/hr to 110 km /hr,how much more distance would a car need to speed: A) on dry roads*0.06 B) on wet roads *0.10 C) on icy roads *0.15 *Note convert from km/hr to m/s ,multiply by 0.278 Or m/s to km/hr
asked by LIily 
math
If someone spent 1/3 of their money at the first store and then 1/2 of their money at a second store. How much money did they start with if they have $9.00 left?
asked by Sue 
geet
in 1996, sharon that spent 189 days in space that is longer than another astronaut. how many weeks was she in the space .
asked by math 
Math
Consider a large water tank: If 3900L occupies 3/4 of the total capacity of the tank, how much water will the tank hold when it is full?
asked by Leah 
Finite Math
How long would it take an investment of $6000 to amount to $9000 if interest is earned at 7% compounded continuously ?.
asked by Mohan 
Mathematics
Solve: 3^(2x+1)=12 Show your workings:
asked by James 
PHYSICS( FRICTION)
A block of 1kg is kept on another block of 2kg in a horizontal surface. Coefficient of friction between two blocks is 0.4. The blocks are given velocities of 2m/s and 8m/s in same direction.The time when relative motion between them will stop =..???
asked by Anonymous 
Mathematics
Solve: 4^(x6)=2^(3x) show all workings.
asked by James 
math
The perimeter of a rectangular cattle enclosure is 400 feet. It is 40 feet longer than it is wide. Using a system of equations solve for the length and width of the enclosure using the substitution method.
asked by jordan 
math
Three times geoff age plus 3 is maryia age .maryia is 48 what is geoff age
asked by Ashley 
calculus
Let Y = 7x sin1(2x)+^3 square root 1+4x2. Find Y'. I don't know how to do the square root part. I have done y'= (7x)' (Sin^1(2x)) + (7x)(sin^1)'+...... y'= 7 sin^1 + (7x)sq(2x)'/square root (1(2x))^2 + .....
asked by Jason 
Social Studies
How were the Canaanites different from the Israelites?
asked by Hayden 
Math
Sketch a possible graph for a function where f(2) exists, lim as x>2 exists, f is not continuous at x=2, and lim x>1 doesn't exist. How do I make this graph exist at x>2 but still be discontinuous?
asked by Kenny 
maths
A bag contains six blue and 4 red balls ,3 balls are drawn at random replacement what is expected no.of red balls that can be drawn?
asked by lee 
Math
Mary can run a mule in 11.2 minutes. How long will it take her to run 9.5 miles at that speed?
asked by Amy 
Mathematics
Solve for X: (x6)log4=(3x)log2
asked by James 
Math
A truck uses 17 gallons of gasoline to travel 442 miles. Write this as a rate. I don't know how to find the rate?
asked by Kellan 
heath
What is a strain?
asked by rabia 
Math
HI!! Um could someone help me with this problem... "Write 300/100 as a percent... I got 3% but Idk if that is right.., PLEASE HELP ME!!!
asked by Versace 
Spanish
____ las 8:00 de la noche cuando el espectáculo A. Fueron/empezaba B.Era/empezó C.Eran/empieza D.Eran/empezó D?
asked by Anonymous 
Psychology
What are the main differences between criminal and noncriminal psychopaths?
asked by Hello! 
Algebra
Solve the following set of equations using elimination. 3x+5y=13 3x+2y=1 My answer: x=0.5 y=1.25 Am I right?
asked by Anonymous 
Math
Least to greatest 1/8,0.78,15%,1/20
asked by Anonymous 
Physics
If a spring gains 0.400 joules of potential energy as it is stretched 0.0375 meters from its equilibrium, what is the spring's force constant?
asked by Harris 
Math
solve the exponential function for x using base 5 logarithms. 5^x+4=125^13x
asked by Help Please! 
Advanced algebra
Find the 7th term of geometric progression if the second term is 75, the 5th term,3/5.
asked by James