Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 1,660

**Physics**

The back of the book says 227 km/h at 162.4 degrees

**Physics**

And your answer doesn't match the back of the book either.

**Physics**

lol can you solve this for me? We have done this multiple times (we think) and we are getting a different answer than that's in the back of the book

**Physics**

A plane is flying 25 degrees north of west at 190 km/h and encounters a wind from 15 degrees north of east at 45 km/h. What is the planes new velocity with respect to the ground in standard position?

**english**

We have to rewrite this correcting fragments and run on sentences can someone check my work below the original. Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in ...

**Finite Math**

Find (a) the final amounts and (b) the total interest earned on the original investment. 1. $4500 is invested at 7.5% compounded annually for 6 years.

**Finite Math**

How long will it take $800 to earn $18 at 6% simple interest?

**Finite Math**

Kathy borrowed $800 at 6% interest. The amount of interest paid was $144. What was the length of the loan?

**Chemistry**

How many grams of HCl need to be dissolved in 0.5L of water to prepare a solution of pH 1.5? Does anybody know how to work this out? Thanks :)

**Chemistry**

How many grams of HCl need to be dissolved in 0.5L of water to prepare a solution of pH 1.5? Does anybody know how to work this out? Thanks :)

**english**

Can someone please help, I'm supose to write explaining what advice one would give George and Lydia Hadley on how to be become better parents. I don't understand this passage so I don't know what to write. "I don’t know anything," he said, "exce...

**math**

What scale would you use for a room that is 12 feet by 15 feet on a 7 inch by 8 inch paper?

**math**

theres none

**math**

9/5xC)+32

**math**

theres none

**math**

what is 9/5x20)+32

**math**

what is expression 5 factorial equal

**math**

what is 85 nearest tenth

**math**

I need help with 40% equal x/30 what is x.

**math**

what is 3z-5+2z=25-5z

**english**

Scientists report (1) THAT CREATURES LIVING IN THE DEEP SEA ARE IN DANGER OF STARVING TO DEATH. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea temperatures. Scienti...

**english**

Scientist report that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live in the deep sea. Creatures in the seabed are suffering from growing food shortages, which may be a result of rising sea temperatures. Scientist beli...

**english**

SO all I need to do is moreless add sentences together to make complete sentences?

**english**

Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea temperatures. Scientis...

**grammar**

Scientists report (1) that creatures living in the deep sea are in danger of starving to death. Millions of undiscovered species live, in the deep sea. Creatures in the seabed are suffering from growing food shortages. Which may be a result of rising sea temperatures. Scientis...

**Finance**

Orbital Communications has operating plants in over 100 countries. It also keeps funds for transaction purposes in many foreign countries. Assume that in 2010 it held 100,000 kroner in Norway worth $35,000. The funds drew 12 percent interest, and the krone increased 6 percent ...

**math**

a hiker travels for 15km on a bearing of 210T how far south is he please show working

**Chemistry**

Need for two balanced chemical equations? I am in need of these two equations which I however do not know how they react. If anyone could help, it is greatly appreciated :) "Formation of products by heating a solid mixture of calcium propanoate and soda lime" "F...

**Physics, help!**

How many protons are needed to produce a total charge of 2.5*10^-15 C?

**Chemistry**

Air in the vicinity of a local power station contains 8.8x10^-4 gm^-3 SO2. What volume of 0.001moldm^-3 Iodine solution would be required to react with a solution obtained from 200dm^3 of contaminated air? The equation given is SO2 + I2 + 2H2O ==> H2SO4 + 2HI Thanks! :)

**Math**

What acceleration will cause a bus to travel a distance of 200 meters in 10 sec if it starts from rest

**Acceleration**

A toy car moves down an incline with an acceleration of 20 cm/s/s. what will its velocity be in 5 sec? what distance will it have traveled..?

**Physics**

A car starts from school gaining a speed at the rate of 2 km/min/sec. how long will it take to nave a speed of 50 km/min?

**Physics**

A jeep has a speed of 50 m/s at a given instant and 10 m/s later. fin its retardation, assuming it to be constant.

**Physics, help me please?!**

A car travels around a circular turn of radius 50 meters while maintaining a constant speed of 15m/s find the minimum value for the coefficient of friction necessary to keep the car on the road in icy conditions, the coefficient of friction drops to 0.15, Now find the maximum ...

**physics**

A small sphere of mass m=.0064kg and charge q1= +28.9 nC is attached to the end of a string and hangs vertically. A second charge of equal mass and charge q2= -58nC is located below the first charge by a distance d= 2.00cm. a. Find the Tension in the string b. If the string ha...

**history**

please help me with this!!!!!! 13. Which statement below would an Islamist be most likely to agree with? (Points : 3) All aspects of society—political, legal, economic, social, and cultural—should be guided by strict Muslim teaching. If people of the Muslim world wis...

**Science**

Students wer given materials to complete a circuit to turn on one light. The materials received were 2 wires, a AA battery, and various sizes of light bulbs. What is the variable in the experiment?

**Algebra**

IF Tony earned $600 after investing $3,000 for five years, what was his interest rate?

**trig**

Solve sin θ = -0.204 for 90º < θ < 270º. Give your answer to the nearest tenth of a degree. Honestly have no idea how to do this.

**Chemistry**

An aqueous solution of HCl has a high electrical conductivity when compared to the compound in hexane, whilst the conductivity of a solution of the compound in diethyl ether has an intermediate value. Explain.

**Chemistry**

An aqueous solution of (NH4)2SO4 has a pH lower than 7. Explain this observation. Thanks! :)

**US History**

I have a few questions about World War I that I can't seem to find information about in any textbooks or online: Was Russia forced to act in defense of Serbia to protect access to the warm water of the Black Sea? Did France extend support to Russia in an effort to recover ...

**Advanced Statistics**

What is Conceptual Framework...?

**Chemistry**

To 40cm^3 of 1mol AgNO3 is added 20cm^3 of 0.500 AlCl3. What is the molar concentration of the resulting AgNO3 solution. The reaction, if needed, is 3AgNO3 + AlCl3 ==> 3AgCl + Al(NO3)3 I worked out the number of moles present in AgNO3 which is 0.04 mol, and the number of mo...

**Chemistry**

Woops I was mistaken! 0.02/0.25L ... the answer comes 0.08moldm^-3! thanks a million

**Chemistry**

A volume of 10cm^3 of 2M H2SO4 is placed in a volumetric flas of 250cm^3 and filled to the mark with distilled water. What is the molar conc. of the H2So4 in the flask? After I found how many moles there are in 10cm^3, which is 0.02 mol, what is my next step, as because the su...

**Chemistry**

A mixture containing 0.5 mol of H2 (g) and 0.5 mol of I2 (g) was introduced into a 10L container at a temperature of 448 C. At this temperature the equilibrium constant Kp is 50. i. What is the total pressure in the container before the reaction starts and at equilibrium. ii. ...

**Chemistry**

A mixture containing 0.5 mol of H2 (g) and 0.5 mol of I2 (g) was introduced into a 10L container at a temperature of 448 C. At this temperature the equilibrium constant Kp is 50. i. What is the total pressure in the container before the reaction starts and at equilibrium. ii. ...

**algebra 2**

In short: 2x^2-5x-3 becomes 2x^2-6x+x-3. Split and factorise for: 2x(x-3) 1(x-3) Which becomes: (2x+1)(x-3) x=-1/2 or x=3

**algebra 2**

Are you wanting it factorised? If so: multiply the constant, in this case '-3' by the co-efficient of x^2, so: (2x-3=6) Take the 2 off the co-efficient and replace the constant, -3, with -6, so you have: x^2 -5x -6 Find products of -6 that also add to make -5. The prod...

**Physics**

what grade is this for?

**algebra**

The owner of a health food store combined cranberry juice that cost $7.79 per quart with apple juice that cost $7.19 per quart. how many quarts of each were used to make 10 quarts of cranberry juice mixture costing $7.61 per quart

**algebra**

Melissa drives her car 200 kilometers in 2.5 hours. How far can she drive in 6 hours at the same rate?

**Math**

your school sucks all i wanted was an anser and all you did was crap

**math**

You have found a summer job manning a lighthouse off the northern coast of Vancouver Island. It is a lonely job and you feel the need for some mental stimulation. In your position, 40 m above sea level, you observe two sailboats in line with the lighthouse. The angles of depre...

**Stats**

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm. You may assume that t...

**Stats**

Many colleges and universities hold a “blood drive” for organizations such as the Red Cross. To help with the planning of an upcoming blood drive, we want to estimate the proportion, p, of students and faculty who would be willing to donate a pint of blood. The Red C...

**chemistry**

how do i convert Pa to atm?

**chemistry**

calculate number of dichlorine molecules in a 5.00ml container at 40 degrees Celsius and a pressure of 2.14 x 10^4 Pa.

**math**

Determine all local and global extrema of the function f(x)=x(x−1)

**TRIF HELP**

No, but thank for the help

**TRIG HELP**

find the exact solutions over the interval tanx = 1 all real x

**Chemistry**

@DrBob222- Temperature does not need to be in Kelvin because it is a ratio, converting to Celsius would give her the same answer.

**Chemistry**

5.0 dm^3= 5 Liters (P1V1/T1)=(P2V2/T2) P1= .92 atm V1= 5.0 L T1=? P2= (800 mmHg/760 mmHg)= 1.05 atm (There are 760 mmHg in 1 atmosphere) V2= 5.7 L T2= 30 degrees Celsius ((.92 atm)*(5.0 L))/(T1)=((1.05 atm)*(5.7 L))/(30 Degrees) 4.6/T1= .1995 4.16/.1995= T1 T1= 20.8 Degrees Ce...

**math**

Suppose e^y=sin(x+cosy) Find dy/dx using implicit differentiation

**Chemistry**

A gaseous mixture consists of 6.95 g of N2, 4.75 g of O2, and 2.75 g of He. What volume does this mixture occupy at 23Â°C and 1.35 atm pressure?

**Chemistry**

28.014 g

**Chemistry**

A 35.0-g iron rod, initially at 25.6°C, is submerged into an unknown mass of water at 67.7°C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 63.5°C. What is the mass of the water?

**Science**

How do I balance a combustion equation? (PLEASE TELL ME ANY SHORTCUTS)

**economics**

The price of a wideget increases by 90%. What effect would we expect this to have on the equilibrium wage rate of workers who make widgets? Would this increase, decrease, or keep the wage rate the same?

**english**

im reading a book called " The berlin boxing club" and i need to answer some questions for hw. theres one question that i need help with which is what is the background of the author? What prompted him/her to write this book? the authors name is robert sharenow. PLEA...

**Statistics**

disjoint

**physics**

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the release of the red bal...

**physics**

Runner A is running at a constant rate of 2.3 m/s when he passes RUmmer B who is stationary. Runner A continues running at a constant pace, and Runner B begins to run 4 seconds after Runner A just passes him. If Runner B is accelerating at a rate of .5 m/s^2, how long will it ...

**physics**

a nasty little boy tries to drop a water balloon from the top of a 20 m tall building so it lands next to and splashes an innocent woman standing on the ground below. how long does the woman have to get out of the way?

**physics**

a man drives with an average speed of 25 mph for 20 minutes. he rests at his destination for 1 hour and then returns home with an average speed for this leg of the trip of 15 mph A) what is his average speed for the round trip B) What is his average velocity for the round trip

**physics**

Water is flowing through a horizontal pipe at a rate 0.2 m3/s. The pipe narrows from a radius of 10 cm to 4 cm. What is the change in pressure?

**physics **

The pressure in a fire hose is 20 atm. How high can a firefighter spray water from this hose? One atm is about 1×105 Pa. The density of water is 1.0 g/ml, or 103 kg/m3. The acceleration of gravity, g, is 9.8 m/s2.

**physics charges. please help!**

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the x-axis under the influen...

**world history**

identify zhongguo

**Physics electric force, please help!**

A charge of +Q and a charge of +2Q are separated by a distance r. The electric force of +2Q on +Q has a magnitude of F and is directed to the right. Which one of the following statements is correct regarding the electric force of +Q on +2Q? (A)The electric force of +Q on +2Q h...

**algebra**

6b+14=-7-b can u help me find out what b stands for in this problem.

**Trigonometric **

Given that sinx = 7 /25 pi/2 <or equal to x <or equal to pi Find the value of cos 2x

**Calculus**

A car traveling 132 feet per second decelerates at a constant rate to 60 feet per second in three seconds. A. what is the negative acceleration? B. How long after the brakes are first applied will it take to come to a complete stop? C. How far does it travel before coming to a...

**physics**

a vending machine ate another students dollar. the student had enough. he dropped the vending machine off a 20 m cliff. at the same time his buddy at the bottom of the cliff throws a grenade straight up towards the vending machine. the grenade strikes the vending machine after...

**phyicis**

a vending machine ate another students dollar. the student had enough. he dropped the vending machine off a 20 m cliff. at the same time his buddy at the bottom of the cliff throws a grenade straight up towards the vending machine. the grenade strikes the vending machine after...

**chemistry**

It would be higher than the true value

**Chemistry**

Oh ok I thought I had to divide by the molecular weight of CaCO3 to find the moles of CO3. So I take the 0.54g CO3 and divide that by 60.01g which gives me 0.009 mol CO3 in 0.009 mol CaCO3?

**Chemistry**

I have 0.009 moles of CaCO3 and I needed to find how many moles of CO3 are in the CaCO3. I am just making sure I am doing this correctly. 0.009 mol CaCO3 x 60.01/100.09= 0.54g CO3 0.54g CO3/ 100.09g CaCO3 = 0.005 mol CO3

**phyicis**

Homer Hickham and his buddies launched model rockets in the late 1950's when the US was trying to get a rocket into space. If homer launches a rocket from rest and its engine delivers a constance acceleration of 8.2 m/s^2 for 5.0seconds after which the fuel is used up by t...

**phyicis**

After cruising at 75 mph down I-80 for 15 minutes on a roach trip, you hit traffic and travel at 15m/s for 15 minutes for the rest of trip. your average speed is 24.26 m/s. What if you were traveling at each speed for the same distance instead of time? What would your average ...

**Social studies**

how does geography affect the development of a civilization?

**Math**

the end point of a line segment is (-3,7) and the midpoint is (1-1) find the other endpoint

**Physics. please help! due tomorrow!**

Let W1 represent the work required to accelerate an object on a frictionless horizontal surface from rest to a speed of v. if W2 represents the work required to accelerate the same object on the same surface from a speed of v to 2v, then which one of the following is the corre...

**chemistry**

calculate the relativistic mass of 1.81x10^24 photons (3.00 mol) with wavelength of 450 nm.

**Chemistry**

I know, I don't understand. I don't know violet light or red light either, we haven't learned mass of those.

**math**

y=(w-5)270 for w

**physics**

A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the package by gravity. Cal...

**physics**

A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the package by gravity. Cal...

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