chemistry! URGENT
61,261 results, page 17

Physics  URGENT
A car is speeding at constant velocity of 30ms1 in an 80kmh1 zone as it passes a stationary police motorcycle hiding. The motorcycle starts to accelerate at 5ms2 at the same instant the car passes it and continues for 8 seconds. It then stops accelerating and maintains its ... 
Physics  URGENT
A car is speeding at constant velocity of 30ms1 in an 80kmh1 zone as it passes a stationary police motorcycle hiding. The motorcycle starts to accelerate at 5ms2 at the same instant the car passes it and continues for 8 seconds. It then stops accelerating and maintains its ... 
history
please help me on my history assessment its due tomorrow morning so its urgent the assessment is based on world war 1 innovation and inventions we were to choose a technology and i choose weapons now we have to write how did weapons make world war 1 a war to end all wars this ... 
math(urgent)
A 7%,6O day note was discounted at 15 days before the maturity date. If the discount rate was 5.5% and the proceeds received were $ 997,77,find a)the amount of discount that was charged b)the discount date if maturity date of the note is 26 october 1991 c)face value a) 997,77... 
Social Studies (URGENT)
Can someone give me five phrases or sentences that would have been said about witches in early modern Europe, that creates panic, hysteria and influence them to participate in the witchhunt. Such as:  Sensitive puritans, be weary of evil women!  Witches are wise, and know ... 
Urgent 8th Grade Language Arts
Choose I for each antecedent that is unclear or missing and C for each antecedent that is used correctly. Thanks so much for you help. 1. We can't go to the aquarium Monday because you need reservations. C 2. Many people have Monday off, so the aquarium will be busier than ... 
Square Root Help!!! Urgent:)
Can you help with these please? I'm so bad at them!! 1. square root 160 2. square root 99 3.  Square root 169 4. square root 12 
Mathematics
A family wants to begin saviving for a trip to paris. The trip is planned for 3 years from now, and the family wants to accumulate one million shillings for the trip, if twelve deposits are made quartely to an account which earns interest at the rate of 8 percent per year ... 
General Chemistry!!!!
Hi I'm a high school teacher. I teach General Chemistry. I'm looking for a textbook for my student. In this course we learn the basics of chemistry and how it relates to our everyday lives/world. 
Physics Urgent!!!!!
OK, I know, I'm postin this way too many times but I'm halfway there now.... Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be ... 
Physics Urgent!!!!!
OK, I know, I'm postin this way too many times but I'm halfway there now.... Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be ... 
Math plz help me!!! URGENT!!
Find the volume of a cone with a radius of 10 mm and a height of 6 mm. 628 mm3 600 mm3 1,884 mm3 1,254 mm3*** Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for π and round to the nearest whole number. 439 ft2 324 ft2 572 ft2 ... 
Physics URGENT!!!
A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.510... 
Physics URGENT!!!
A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.510... 
Help pls urgent
A disk of radius 30 cm is spinning about it axis at 60rmp it deacelerate at a constant rate of 2.0 rad/s^2 until it reaches 20 rpm A find the initial and final angular speed in radians per sec B fine the time it takes to deacelerate from the initial to the final angular speed ... 
Math (URGENT)
A word problem. David flew 300km on a commuter plane, then 2000km on a passenger jet. The passenger jet flew twice as fast as the commuter plane. The total flying time for the journey was 3.25 hours. What was the speed of each plane, in kilometers per hour? Please help. I've ... 
Calculus  Urgent!!!
In case this looks familiar, yes, it is a repost. I really need help. Find the antiderivitive of f(x)= x^3(x2)^2. Multiple choice gives me the options: A: 1/6 x^6  4/5 X^5 + x^4 + C B: 1/6 x^6  4/5 X^5 + 1/4 x^4 + C C: x^6  X^5 + x^4 + C D: x^5  4x^4 + 4x^3 + C I got as ... 
maths(urgent answer pls)
1).Find the sum of the n terms of the series Sn=1^2 + 3^2 +5^2+...+(2n1)^2 2).Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6) +.... 3) Sum to n terms,the series 1.3.5 + 2.4.6 + 3.5.7 +. 
Chem Urgent Help
Plz explain in detail.... i tried to search on internet but i am confused with coefficents.. how to set up the equaiton .. plz help me ??? Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol SF = 327 kj/mol S=O = 523 kj/mol Use ... 
phys urgent!
A particle leaves the origin with a speed of 2.4 times 10^6 m/s at 38 degrees to the positive x axis. It moves in a uniform electric field directed along positive y axis. Find Ey such that the particle will cross the x axis at x = 1.5 cm if the particle is an electron. I don't... 
Science (urgent!)
Three characteristics of friction force and surface type. Three characteristics of friction force and mass. Three characteristics of friction force and surface area. I don't quite understand what they mean by characteristics, or what they want me to do. Could I please get some... 
Science URGENT!!!
Mulitple choice: why is it uncommon to draw lewis diagrams for ionic compounds? A.) Lewis diagrams can only illustrate covalent bonding B.) ionic compounds cannot be represented by Lewis diagrams C.) ionic compounds involve electron transfer not electron sharing d.) formulas ... 
English
I have an urgent question: I have to mention only the countries two tourists went through. I want to be sure that they are countries 1) Europe (is a continent not a country, so I don't include it) 2) Ukraine 3) Kazakhstan 4) Mongolia 5) Russia 6) Bering Strait (no) 7) Alaska, ... 
physics (Urgent)!!!!!!!!!!!!!!!!!!!!!!
A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 300 rad⋅s1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the horizontal. The gyroscope is ... 
Urgent math
A couple needs a mortgage of $300,000. Their mortgage broker presents them with two options: a 30year mortgage at 8 1/2% interest or a 15year mortgage at 7 3/4% interest. (Round your answers to the nearest cent.) (a) Find the monthly payment on the 30year mortgage and on ... 
Chemistry (kind of)
Okay so this is actually for an english assignment where we have to report on a problem in our field....mine happens to be Chemistry so I was wondering what kind of problems or disputes can be caused in a chemistry lab... 
Statistics(Urgent!Please help)
I have a chart that has 4 columns across the top and 33 going down. The colunms on the top read: predicted number, selected number, (col 1  col2)^2, and the mean of x. Their are 32 predicted numbers and 33 selected numbers. I need to fill in the column that says the mean of x... 
MATHS URGENT !!!
5 ladies working at the same rate can make 500 curry puffs in 1hour . How long will 3 ladies working at the same rate take to make 500 curry puffs ? Give your answer as a mixed number . 
chemistry URGENT!
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all the nitrogen boils ... 
Math Urgent!
A manufacturer has recorded the profit P (in dollars) when there is a monthly advertising expenditure of A dollars. The data is recorded in the following table. A 200 500 800 1100 1300 P 8030 14,480 14,630 8480 860 (a) Find a quadratic model for pro fit as a function of ... 
Physics Urgent!!
A day on Mars is 24.6 Earth hours long. A year on Mars is 687 Earth days long. How do the angular velocities of Mars’ rotation and orbit compare to the angular velocities of Earth’s rotation and orbit? w(M)/w(E)= and w(My)/w(Ey)= w is what I used to represent omega... 
Precalculus URGENT
Convert the rectangular coordinate (8,i (square root of 3) into polar coordinates. How do I do this?? I tried every way I knew of to convert the y coordinate (i (square root of three)) to polar form, but it didn't work. I think that the polar form of the x coordinate is ... 
Chemistry URGENT
I need help to evaluate if I completed my experiment calculation. determination of water in a hydrate. 1. Mass of crucible, and cover = 18451.3 2. Mass of crucible, cover and sample = 23410.2 3. Mass of crucible, cover and sample after 1st heating = 21789.8 4. Mass of crucible... 
Physics URGENT!!!
A coin rests 18.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.420. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.650 rad/s2. (a) After 3.00 s, what is the ... 
Science URGENT PLEASE
1. what would you expect the pH value for grapefruit juice to be? (>7, 7, <7) 2. A.) Which two ions are present in very small amounts in any sample of pure water? b.) what is a good alternative chemical formula for water rather than H2O? Why? c.) with respect to ion ... 
Physics  urgent ; test Monday
Divers entertain tourists in Punta Cana by diving froma cliff 36 meters above water. Determine the landing speed; ignore air resistance and assume the object starts from rest. I'm supposed to be using kinematics formulas. I tried using d=V(i)t+1/2at^2 and then plussing the ... 
Physics URGENT!!!
An accelerometer in a control system consists of a 2.42 g object sliding on a horizontal rail. A lowmass spring is connected between the object and a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out vibrations of the ... 
Physics URGENT
A speeder passes a parked car at 35.0 m/s. The police car starts from rest with a uniform acceleration of 2.41 m/s^2. A.) How much time passes before the speeder is overtaken by the police car? B.) How far does the speeder get before being overtaken by the police car? 
algebra (urgent help needed)
1. a chemical compound requires 8 ounces of chemical a and 12 ounces of chemical b. a mixture contains 24 ounces of chemical a and 30 ounces of chemical b. how can you fix the mixture to make the chemical compound? 
maths help needed!(urgent)
find the equation of the tangent to y=x(a^3/x^2) at the point (a,0) how to i work this out??can someone please show me how to do it step by step?thanks!!! Take the dervative of y y= x a^3 x^2 y'=1+2a^3/x^3 so the equation for the tangent is y= mx + b where m is y' above ... 
Psychology Please Help!
Mr. Buss is a business executive. He has been dedicated to the company for ten years and worked his way up the corporate ladder to the position of third vice president. He is the first to arrive and the last to leave each day. He has no patience with those who might waste his ... 
Spanish #2 (URGENT)
Can someone check my work? Create a sport skit/presentation using commands and actions. Escuchanos! Vamos a enseñar cómo jugar al futbol. Pon en los zapatos de fútbol. Trae un balón de fútbol. Va al campo. Golfea el balon con el pie. Corre al balon y golfea de nuevo. ... 
Urgent Help needed in PHYSICS!
A spherical balloon is inflated to a diameter of 20.0 cm. Assume that the gas in the balloon is of atmospheric pressure (101.3 kPa) and is at a temperature of 20.0 ¡ãC. It is then taken by a diver 15.0 m under the sea. The temperature of the seawater at this depth is 16.0... 
physicsurgent
A block of mass m = 3.20kg slides from rest a distance d down a frictionless incline at angle θ = 30.0° where it runs into a spring of spring constant 425 N/m. When the block momentarily stops, it has compressed the spring by 22.0 cm. (a) What is the distance d? I found ... 
English
The sentence "Like a boil that can never be cured as long as it is covered up but must be opened with all its pusflowing ugliness to the natural medicines of air and light, injustice must likewise be exposed" communicates a(n) __________ tone A.Urgent B.Matter of fact C.... 
PHYSICS URGENT DUE IN 15 MINUTES
The figure below (a) shows a sphere with a radius of r = 157 mm (density ñ = 1.24 g/cm³) suspended in water by a string. The ball is completely submerged in the water and the string is attached from the bottom of the water tank to the bottom of the sphere. What is the ... 
MATH! URGENT!!!
There are 32 teams in the NFL. Sixteen of the teams are in the American Football Conference (AFL) and the other 16 teams are in the National Football Conference (NFC). At the beginning of the season, Julia tried to predict the teams that would be in each conference's ... 
English
I forgot to add these few more things. They are really urgent. Thank you. 1) I told my collegues about the possibility of carrying out a Comenius project on how to write the screenplay and shoot (make) a film. 2) As a matter of fact, they would rather be involved in a project ... 
maths(variation)
pls when solving finish it up!!! Very urgent! 1) the load which a crame can lift up is directly proportional to the mass and inversely proportional to the height through which the load is to be lifted.if a load of 40 and mass of 175gm is lifted through height from what load ... 
Physics... URGENT !!!!
A 66.7kN car is travelling at 66.5 mph when the driver decides to exit the freeway by going up a ramp. After coasting 418 m along the exit ramp the car\'s speed is 28.9 mph, and it is h = 13.1 m above the freeway. What is the magnitude of the average drag force exerted on the... 
URGENT  Trigonometry  Identities and Proofs
Okay, today, I find myself utterly dumbfounded by these three questions  Write a proof for  2/(sqrt(3)cos(x) + sin(x))= sec((pi/6)x) Solve the following equation  2sin(2x)  2sin(x) + 2(sqrt(3)cos(x))  sqrt(3) = 0 Find all solutions (exact) to the equation  sin^2(x)cos^2... 
math
The large red equilateral triangle has sides of 8x units. The midpoints of the red triangle are joined to form the blue triangle. The midpoints of the blue triangle ate joined to form the green triangle. The process of joining midpoints to form new triangles continues ... 
Urgent 1 Math question
Elaine has a customer who needs a box with a volume of 12 cubic inches. Th e customer wants to know what size box is the least expensive to buy. • Th e price will be based on surface area. Th e supplier charges _ 21_ cent per square inch. • Th e dimensions of the box are ... 
URGENT! Due soon and I used 8 of 10 attempts
Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C present in the object. The amount of isotope decreases in a firstorder process. If 14.5% of the original amount of 14C is present in a wooden tool at ... 
GEOMETRY LATERAL AND SURFACE URGENT (PLEASEHELP)
1.A RECTANGULAR BOX IS TO BE PAINTED ON ALL ITS SIDES. IF THE BOX IS 15 DM LONG, 12 DM WIDE AND 6 DM HIGH. HOW MUCH SURFACE IS TO BE PAINTED ? 2. IF EACH SIDE OF AN OPEN CUBICLE BOX IS 2X+3 CM. FIND ITS TOTAL SURFACE AREA. 3. MICHEAL IS TO MAKE A BOX IN THE FORM OF A ... 
URGENT HELP
1.In a pith ball experiment, the two pith balls are at rest. The magnitude of the tension in each string is T = 0.55 N, and the angle between each string and a vertical line is θ = 27.33°. What are the values for the magnitudes of electrostatic force, Fq, and the ... 
FRENCH URGENT HELP
for each of ariane's statements, tell her one thing she should do. ex. j'ai soif = il faut prendre une boisson. 1. j'ai faim = Il faut manger de la pizza. 2. je voudrais faire une quiche? 3. il n'y pas de legumes dans le frigo= il faut acheter des legumes. 4. je veux regarder ... 
english
Q1.In following sentences underline the stressed syllables in each? 1.I know why he wanted to see you. 2.What’s the time? 3.Don’t forget to turn out the light! 4.It’s another beautiful day today. Q2.In the following sentences underline the unstressed syllables in each? a... 
Economics REALLY URGENT!!!!!
Hi my assignment is due like TODAY. I need three simple criterion to evaluate whether it is good to buy shares in a company. So far I have the profability of shares, the potential for a share to be bluechip but I am lacking a third. I'm stuck because I have already evaluated ... 
Calculus urgent
For the intergral of (x^2)/3 +6 interval [0,3] Rewrite it as a function of n using the right hand endpoint without any summation sign. can anyone help me start this problem out? I noticed somebody else had that post before, perhaps it was you. I am not sure exactly what you ... 
Electricity
Very very urgent please help me... A small ball with mass =0,4g charged with electricity= 3x10^(10) coulomb is united with the edge of a silk rope with length=8cm. The other edge of the rope is on a big insulating material with concentration of the electric energy: 25x10^(6... 
PHYSICS URGENT
2. A point charge of +1.0 µC is moved in the direction of an electric field, and it has a change in electric potential difference energy of 10.0 J. What was the change in electric potential difference? 1 µC = 106 C (Points : 1) 1.0 × 10^8 V 1.0 × 10^7 V +1.0 × 10^7 V +... 
URGENT MATH!!
Q1: Robert can paint a room in 12 hours. Dennis and Vince can paint the room in 10 hours & 9 hours respectively. If Dennis and Vince work together for 2 hours, How long will it take Robert to finish the job? I think it's 12 (because it says it, but I think the question was how... 
Physics Urgent!!
Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th century ... 
Physics Urgent!!!!!
Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th century ... 
Physics URGENT!!!
A 75.0 kg fullback running east with a speed of 6.00 m/s is tackled by a 82.0 kg opponent running north with a speed of 5.00 m/s. (a) Calculate the velocity of the players immediately after the tackle. (b)Calculate the direction of the players immediately after the tackle.(c)... 
Urgent  Physics
The Ushaped glass tube in the figure below contains two liquids in mechanical equilibrium: sea water of density 1.025 kg/L, and an unknown liquid of density ρ. The unknown liquid is in the left tube, floating on top of the water with a clearly visible interface. Use h1... 
Physics, URGENT!!!
We consider tobacco virus diffusing along a 0.47 m long tube filled with water. The crosssectional area of the tube is unknown. The diffusion coefficient is found in Table 10.5, p. 319 in the textbook. A total amount of virus of 2.6 x 1016 kg is transported in a steady state... 
AP CALCULUS!! HELPPP URGENT
related rates: the base of a pyramidshaped tank is a square with sides of length 12 meters, and the vertex pyramid is 13 meters above the base. the tank is filled to a depth of 5 meters, and water is flowing into the tank at the rate of 2 cubic meters er second. find the rate... 
Chemistry HELP!!!URGENT
Indicate which elements can be used as potential semiconductors, and which ones can be used as potential dopants used to make ntype and ptype semiconductors by placing them in the corresponding bin. F, Al, As, Ge, I. ptype semiconductors can consist of: a)highly purified ... 
Physics URGENT!!!
A 41.8 kg girl is standing on a 142. kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.40 m/s to the right relative to the plank. (a) What is ... 
ICT ( please answer as soon as possible.its urgent
multiple questions: 1 Computers are connected to the internet through a)direct connection b)dial up connections through modems c)broadband connection through high speed alternatives to modems d)all of these 2)who is the person responsible for the development of the ... 
Physics (urgent please)
Using the approximation formula for the doppler shift, fo=fs(1+Vrel/c), one finds that a source is moving aways at 0.60c. What result would the exact formula yield for the recession speed? I have not idea how to figure this one out. Help please. http://en.wikipedia.org/wiki/... 
AD Analysis (URGENT)
I have to do an ad analysis of alcohol. And I've decided to use a GREY GOOSE VODKA ad. Here is one of the question I'm having trouble answering" What type of characters are portrayed in this advertisement. (ie. age, gender, physical attributes, etc?) I don't know how to answer... 
Physics pls anyone can help me? its urgent
A charged rod of length 21cm and total charge 7.5muC is bent into a threequarter circle symetric about the xaxis as shown below What is the magnitude of the Electric Field at the center of the threequarter circle in N/C ?:Which directions listed below make up the ... 
accounting 2 urgent please help
part 2 thank you Prepare a statement of cash flows, using the indirect method of presenting cash flows from operating activities a.Equipment and land were acquired for cash b.There were no disposal of equipment during the year c.The investments were sold for 45,000 cash d.The ... 
precalculus urgent
The first term of an arithmetic sequence is 6, and the tenth term is 2. (a) Find the common difference d. d = Find the 100th term of the sequence. a100 = (b) Find the partial sum of the first ten terms. S10 = how do i do this, there's an example I tried following but it did ... 
Math
If you pass general chemistry, then you can take organic chemistry. You pass general chemistry. ˆ You can take organic chemistry. Let P = you pass general chemistry Let Q = you can take organic chemistry I came up with P  >Q P therefore Q But my set up is wrong, how do ... 
mathsurgent
Arjun spent Rs.12 to purchase some pens and pencils.The cost of a pen and pencil are in the ratio 3:2. the total cost of a pen and a pencil is Rs. 3. if the total number of pens and pencils he purchased is7, find the number of pens he purchased. 
Physics Urgent!!!!! I really need help with this
Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ... 
Chemistry
I'm having a hard time getting started studying for my chemistry midterm. i'm kind of overwhelmed. my teacher gave me a brief study guide, but where would be the best place to start? are notecards effective for studying chemistry? 
PHYSICS URGENT!!!
Consider a solid ball of mass m = 50g and is placed on a long flat slope that makes an angle of 30° to the horizontal. The ball was initially at rest and was then released such that it rolled down the slope without slipping. With a detailed explanation of your method ... 
History, Urgent
Early in the war, American Indians living in Indian Territory disagreed on which side to take. Which of the following best describes the split that occurred? A.groups split along religious lines (Christians vs. nonChristians) B.groups split along tribal lines (Cherokee/... 
Physics  urgent!!!
A swimmer tries to go straight across a river that is 500m wide. The swimmer can swim at 1.5m/s. There is a current of .05m/s downstream. Calculate a) the actual velocity of the swimmer b) how long it will tale to reach the far shore c) how far donstream the swimmer will hit ... 
URGENT 8th Grade Math
Write a word phrase for the algebraic expression 3x7. The difference of three times and number x and seven. The difference of seven and three times a number x. Three times a number x fewer than seven.** The quotient of three times a number x and seven. Steve or Ms.Sue am I ... 
Statistics  Urgent
If there were two groups: One group who saw a yardstick before estimating its length Another group who did not see a yardstick before estimating its length Would this be a matched pairs design (a person from both groups estimates at the same time, then the next pair, etc.)? Or... 
Algebra 1 urgent
(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that solved into y=ax*2+bx+c ... 
Physics Urgent please help
A physical pendulum consists of a body of mass contained in the xyplane. The moment of inertia of the object about an axis perpendicular to the plane and passing through the object's center of mass is I_cm . The object oscillates in the xyplane about the point S a distance d... 
Chem REALLY URGENT!!!
2. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + O2 HCN + H2O You have 8 g of methane and 10 g of ammonia in excess oxygen. Answer the following questions: • What is the ... 
English
1. Choose two of the scientists you read about in the Stories of Scientists unit. Compare and contrast these scientists. Answer this question in no fewer than two paragraphs. Be sure to include specific details about each scientist’s life, career, and personality in your ... 
ap chemistry
I have taken ap chemistry but I have language barrier and sometimes I don't get it and I am getting behind.We are already in chapter 9.I don't want to quit. What is the best way to improve and learn faster?Any practice I should do?What is the experience taking ap chemistry ... 
URGENT Spanish help please.
ok in the example it shows: ¿Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach biology? My ... 
algebra
URGENT! How do you calculate for marginal cost against fixed cost. E.g., a company produces 2 pairs of shoes at $390.00. If it produces 1 more pair (making total production 3), total cost is $600.00. If no production is made, the fixed cost is $130. With this scenario, how do ... 
Geometry (Urgent)
Hi, one Professor gave me a very hard question, He has a little Disk (used in machines) that has a big hole in the middle, he measured the thickness every 90°, and he got the following measurements: 0.95 mm 1.02 mm 1.02 mm 0.96 mm He tells me that with 3 of these measurements... 
Chemistry
Chemistry and engineering topics how chemistry relates to engineering for my 10 page research paper 
ENGLISH PLEASE HELP!!! URGENT!!!
The Lantern Festival is a unique Chinese cultural tradition that includes aspects such as fancy lanterns, watching the Lion Dance, and eating tangyuan. I wrote this thesis statement at the beginning of a paper I wrote about the Chinese Lantern Festival. but I have to restate ... 
Physics..Urgent!!!
In the sport of pole vaulting, the jumper's point of mass concentration, called the centre of mass, must clear the pole. Assume that a 59 kg jumper must raise the centre of mass from 1.1 m off the ground to 4.6 m off the ground. What is the jumper's potential energy at the top... 
BiologyUrgent
Need help with these: a) What is a major structural advantage that eukaryotic cells have over prokaryotic cells? Why is this so important? b) Identify one similar and one different way each type of cell uses flagella c)The cytoskeleton of eukaryotes serves many functions. One ... 
Calculus Help Please Urgent!!!
Breathing is cyclic and a full respiratory cycle from the beginning of inhalation to the end of exhalation takes about 3 s. The maximum rate of air flow into the lungs is about 0.3 L/s. This explains, in part, why the function f(t) = (3/10)sin(2πt/3) has often been used ... 
Urgent math pls
The noise from a power mower was measured at 108 dB. The noise level at a rock concert was measured at 119 dB. Find the ratio of the intensity of the rock music to that of the power mower. (Round your answer to the nearest whole number.) I tried by 108119 =11 but then I did ...