Posts by Patrick

Total # Posts: 751

Physics
I am having a problem answering a physics question: A plane is heading due south and climbing at the rate of 60 km/hr. If its airspeed is 540 km/hr and there is a wind blowing 110 km/hr to the northwest, what is the ground speed of the plane?

Chemistry
Suppose 50.00 mL of 2.0 E -5 M Fe(NO3)3 is added to 50.00ml of 2.0 E -4M KIO3. Which of the following statements is true? For Fe(IO3)3, Ksp= 1.0 E-14 a-precipate forms because Qc<Ksp b-No precipate forms because Qc>Ksp c-Nothing happended d-No precipate forms because Qc&...

Chemistry
I figured out the answer. Thanks.

Chemistry
What is the solubility (in g/L) of PbCl2 at 25 degree celsius? The solubility product of PbCl2 at 25 degrees celcius is 1.6x10-5.

chemistry
How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -1

maths help please
9409

Chemistry
Question asking about how enzymes affect the rate of a reaction. Check all that apply 1. They shift the reaction equilibrium towards the products. 2. They increase the concentration of the reactants. 3. They lower the activation energy of the reaction. 4. They decrease the ...

Physics
Two blocks sit on a horizontal surface. They are connected to each other by a massless cord. The block on the left has a mass of 4.8 kg and the block on the right has a mass of 2.2 kg. Another massless cord is attached to the block on the right and pulls that block with a ...

Physics
A thin 5.4-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. There are no other antinodes. The density and Young's modulus of this metal are, respectively, 5200 kg/m^3 and 7.9x10^10 N/m2. What is the frequency of the rod&#...

physic
A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?

physic
A canon is angled at 45º and fires a canon ball at 100 m/s. How long will it take the canon to reach it's maximum height?

Chemistry
Which ligand binds the tightest? Ligand A, with a Kd of 10^-9M Ligand B, with a Kd of 10^-3M Ligand C, with a percent occupancy of 30% at one micromolar Ligand D, with a percent occupancy of 80% at 10 nm

Chemistry
I'm given sequences and asked to classify them as "Most likely an amphipathic alpha helix", "Most likely an amphipathic beta sheet", "Most likely a turn/loop" or "Not Amphipathic" Sequence 1: Arg-Phe-Gln-Ile-His-Val-Gln-Phe-Glu ...

Math
HELP! Input:1 1/3 Output 7/12 Input 2 3/5 Output 1 17/20 Input 3 5/6 Output ? Input ? Output 3 5/8. What is the rule, and what are the question marks values?

Physics
A long jumper leaves the ground at an angle of 15.1◦ to the horizontal and at a speed of 10.9 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m 010 (part 2 of 2) 10.0 points What maximum height does he reach? Answer in units of m

chemistry
23 grams of NaOH is dissolved in 1.5L of water, find; a)Concentration of the solution b)pOH c)pH

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 chemist decomposes ...

Physics
Find the work done in stretching the spring. Answer in units of J

Physics
The force required to stretch a Hooke’s-law spring varies from 0 N to 70.4 N as we stretch the spring by moving one end 5.35 cm from its unstressed position. Find the force constant of the spring. Answer in units of N/m

physics
A 22 g bullet is accelerated in a rifle barrel 43.2 cm long to a speed of 907 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N

math 5th grade
Lynda cut 3.2 meters of ribbon into equal-size pieces. Each piece was longer than .01 meter, but shorter than .02 meters, with lengths in increments of .02 meters. How many pieces did Lynda cut and how long was each piece?

Chemistry 12
given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum

Chemistry 12
given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum

College Algebra
Find a polynomial function f(x), with real coefficients, that has 1 and 3+2i as zeros, and such that f(-1)=2 (Multiply out and simplify your answer)

calculus
Find the dimensions of the rectangle with the largest area that is inscribed inside the parabola y = 16- x^2 and the x-axis

Geometry
The angle of elevation of a ladder leaning against a wall is 45°. If the distance from the base of the ladder to the wall is 15 feet, find the length of the ladder.

Math
in reality 95 = 95.0 so if you move the decimal place over 1 to the left you get 9.5 x 10^1 = 9.5 x (10) = 95 if you move it twice to the left you get .95 x 10^2 .95 x 10^2 = .95 x (10 x 10) = .95 x 100 = 95 So your answer would be .95 x 10^2 so scientific notation would just ...

Math
mean = add numbers together then divide by how many #s Median = middle of the numbers mode is the most frequent number

Precalc/Trig
Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

Math
Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

Math
Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

Math
Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

Math
Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)

Math
Find all values of x, 0<x<(ƒÎ/2) for which (1/ã3)<cotx<(ã3)

Math
80% times the price(x) .8x

Science
What is the final pressure of the gas relative to its initial pressure when there is an increase in Kelvin temperature of a cylinder of compressed gas by a factor of 2.7?

Physical Science
How much heat in joules is needed to raise the temperature of 5.5 L of water from 0 degrees Celsius to 78 degrees Celsius?

math
7.185 x 10^2 because you move the decimal 2 spots to the left

PHYSICS
WHEN THE BAROMETRIC PRESSURE IS 14.9LBS\IN AND THE PRESSURE GAGE ON A TIRE READS 34.6LBS\IN WHAT IS THE ABSOLUTE PRESSURE INSIDE THE TIRE

Physic
A ball is thrown upward. What is its initial vertical speed? The acceleration of gravity is 9.8 m/s^2 and maximum height is 7.2 m,. Neglect air resistance. Answer in units of m/s

trig
(a) sketch an angle A in standard position whose terminal ray passses through the point (1,-4) (b) Find the exact value of the six trigonometric functions of A, (c) Let B be the reference angle of A. Find a point on the terminal rsy of B in standard position and add B to your ...

trig
find the reference angle of -20000 and express the six trigonometric functions of -20000 in terms of the six trigonometric functions of its reference angle.

trig
my question is find all angles of theta and 2pi whose reference angle is alpha = pi/12. Give exact answers. i cannot for the live of me find this

Math
Thank yo MS Sue. That is want I came up with but just wanted confirmation. thank you

Math
there are 7 people and you ordered 4 pizzas. Each person ate 3/8 of a pizza. How much pizza would you have left

Physics
Consider the following four possibilities for two point charges and choose the one(s) that do not change the magnitude of the electrostatic force that each charge exerts on the other: A. Double the magnitude of each charge and double the separation between them. B. Double the ...

math
find the area of a rectangle bounded by the axes and one of its corner is a point in the curve y=1/x.

computers
I'm confident that I found the right answer at Google, and I don't even have a copy of your book. What's in your book is not a magical world that can be divorced from the real world. Your book can't tell you something is true if there is no other way to CONFIRM...

Computer Label Paper
This is a trick question, since some of these paper choices don't even exist! Avery does not make ANY product with the number 6150 as part of the product name, according the the Avery company site. If Avery doesn't even offer the paper in answers (A), (B), (C), or (D...

Logic
Distribution: "We distinguish a distributed term (subject or predicate) from an undistributed term in this manner: A distributed term is one modified by 'All' or 'No.' When a term is modified by "some," it is undistributed," because it does ...

English
This sentence above is one terrible example of English. There should be a semicolon after "playground" instead of a colon. I hope you read a lot of books and newspapers, so that you won't have to learn proper English grammar entirely from books like this one.

U.S. GOVERNMENT
You can answer all of the above questions by googling the qestions' key words in the questions. And you'll learn a lot by doing so. If you don't understand the vocabulary (terms) used in the questions, you might have trouble. So, you might have to look up the word...

English Language
You could make a list the reasons why you don't like to be a class monitor. But, you would have to think about the experience and write the list.

U.S. GOVERNMENT
In most States, the right to vote was originally denied to all but which one of the following groups?

History
When you are given a multiple choice question, you have to look at each possible answer to determine why it might be wrong. You have to look at each of the possibilities and find a logical reason to eliminate them until you have eliminated all but one answer. When only one ...

READING
Your confusion probably results from not understanding the phrase "suited to." In this case, "suited to the night" means "benefits from the night." Compare this to people (like house painters, dressmakers and jewelers) who benefit from working in ...

Public Speaking
The question is, who is the president's audience? Since the President's audience is the public (everything he says will become public), therefore this is public speaking. Everything the President says in his speech will be reported in the newspapers and his speech will...

Australian Studies
"great obesity epidemic" is in quotation marks, so just Google it, in quotation marks, and see who used this expression and why. Once you've read a newspaper article or two that includes this expression, you'll have all of the information you need to answer ...

HEALTH
Is this proposition true? For it to be true, BOTH parts have to be true. Is it true that "anything lawful is ethical"? Is it true that "anything ethical is therefore always legal." Because the words "always" is used, in the second part, and always...

science
Are we talking about an automobile or a train car? The answer would depend on variables like the height of car and the location of it's "center of gravity." Also, I assume you mean, 'How fast can the car go without tipping over?' Whether the car is on ...

abnornal psych
Here is a list of criteria that the American Psychiatric Association says it will use to determine what new diagnoses might appear in the new DSM. After reading the half page of criteria, you can try and decide for yourself whether it seems like "suicide" would/...

French
The terrible thing about textbooks is that it's not enough to be able to read and understand the text. You ALSO have to be able to read and understand the question about the text. If you cannot understand the question that is asked, it doesn't matter that you DO ...

Chemistry
How many moles of Xe gas are there in a container of Xe with a volume of 1.5L, and a pressure of 1.25 atm, and a temperature of 150C?

Chemistry
A container with a volume of 19.6 L that has temperature of 37C and a pressure of 0.900 atm has its temperature lowered to 0.00C and its pressure raised to 1.90 atm. What will the new volume be? Assume that the number of moles is constant.

Writing
You have a lot of facts here about the singing governor. If you think about why each even occurred and try to explain, then you'll write a better paper. For example, you say that his career began when he was signed to Decca Records. But, if you think about what you've ...

Life orientation
Drug addiction

life orientation
Water polution couse many illnes like malaria

geometry
Chapter one Quiz 3 to the heart tenth. cone S. Find the surface i 12 Chapter 12 Quiz 4

Math
$500 was deposited into an account at the first of the year. Interest earned was 5%. An additional $15 was deposited each week. How much was in the account at the end of the year?

Math
$500 was deposited in January @ 5% interest. $15 per week deposited all year long. How much money was in the account at the end of the year?

calculus
graph 2.25h+5m>23

calculus
Give a possible formula for the illustrated function using a vertical shift of an exponential function. The two points marked on the graph are A=(−172) and B=(10). The red horizontal line is given by y=−3, and is a horizontal asymptote of the function y=?

Acid-base titration
A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at the following volumes of base added and make a graph of pH versus Vb: Vb = 0, 1, 5, 9, 9.9, 10, 10.1, and 12 mL.

physics
A puck on a horizontal, frictionless surface is attached to a string that wraps around a pole of finite radius, as shown in the figure . As the puck moves along the spiral path, does its speed increase, decrease, or stay the same?

language arts
are my feet are killing me is a alliteration, personification , or hyperbole?

MATH
11.5 minutes ;)

physics
A 19.2-kg box rests on a frictionless ramp with a 16.1° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 43.6° with the horizontal, what is the smallest force F the mover will have to exert to move the box up...

Calculus
Can someone explain to me how to do these? Given the following definite integral and n=4 answer the following questions. (Round your answers to six decimal places.) 1. Use the Trapezoidal Rule to approximate the definite integral. Answer: T4= 2. Use the Midpoint Rule to ...

AP World History
I took college levels classes AT A COLLEGE beginning when I was 13 years old and I accumulated over 40 credits toward college before I was 18 years old. Don't let anyone tell you you can't understand college materials. Before you search the text of your textbook for ...

Physics
A positive charge Q is on the y-axis at a distance a from the origin, and another positive charge q is on the x-axis at a distance b from the origin. A) For what values(s) of b is the x-component of the force on q a minimum? B) For what values(s) of b is the x-component of the...

Physics
A positive charge Q is on the y-axis at a distance a from the origin, and another positive charge q is on the x-axis at a distance b from the origin. A) For what values(s) of b is the x-component of the force on q a minimum? B) For what values(s) of b is the x-component of the...

math
1.8÷0.6

math
mathematical expression of: 1.) 75-5 2.) 14x(3+4) 3.) 3x(11+6) 4.) 1+(6+8) 5.) 20+5-80 6.) 4x2+5

algebra 1 honors
If r=5/3r+20/3, what is r? URGENT!!!!

calculus
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your decimal coefficients to four decimal places.) x/(2x^2-1)^0.4 dx

Chemistry
Compound A reacts with element B (a halogen) to form compounds C and D as the only products. When 2.000 grams of B react with an excess of sodium metal 2.363 grams of the sodium halide are formed. Compound A is a volatile liquid at room temperature with a density of 0.8800g/ml...

college
HORIZONTAL LINE X | Y ___|___ -3|2.25 -2|2.25 -1|2.25 0|2.25

equation
what is the equation of calculating 5/90 lottery winning numbers if these numbers were selected for the first week 24-13-6-60-70

math
jskvhaklhv hvla avugalivia the cakiucdnla

Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

Calculus Please Help
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

Calculus
Let y(x)=ln(cosh(x)+ sqrt(cosh^2(x)−1)) Find the derivative Dxy= I don't know what to do with this...

chemistry
Determine the weight of Calcium Carbonate decomposed to produce 4 liters of Carbon Dioxide.

Chemistry
A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of HA ? B. What is Ka ...

Chemistry
A student titrates 0.025 M KOH into 50.00 ml of a solution of unknown weak acid HA. Equivalence point is reached when 30.00 ml of the KOH has been added. After 15.00ml of the KOH has been added the pH of the mixture is 3.92. A. What is the concentration of HA ? B. What is Ka ...

Calculus
Find d^2x/dt^2 as a function of x if dx/dt=4xcosx.

5th grade math
5/6 x 24=

Chemistry
CaCO3(s) <--> CaO(s) + CO2 (g) A 5.9-gram sample of CaCO3 (molar mass = 100.) is placed in an evacuated 2.00L container and heated to 200^oC. Equilibrium is reached when 5.15% of the CaCO3 has decomposed. 1)Write the Kp expression for this reaction and calculate its ...

Algebra
Factor the following trinomial: w^18 – 9w^9y^5 + 14y^10

Algebra
Can you write a binomial in standard form with a degree of 0? Can you write a binomial with a degree of 3? Explain.

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