Thursday

April 17, 2014

April 17, 2014

Total # Posts: 492

**Chemistry**

Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the net ionic equation 4...

**chemistry**

Considering a 1.0M of each solution, which has the greatest osmolarity? 1. FeCl3 2. K2O 3. HCl 4. HC2H3O2

**Speechwriting**

Hey How would I go about doing a PPT, assuming that I'm delivering a speech at a conference on Waltzing Matilda. My teacher said it must not detract from the presentation.

**Algebra Please Help**

Math Word problem with factoring...HELP!!! This questions has me stumped!? I have been working on it for days... A 10ft-by-15ft pool was installed in your backyard. You have $3000 left that you would like to spend on surrounding the pool with a patio, equally wide on all side...

**Economics**

Thank-you! Do you know of any sites that specifically pertain to the airline industry?

**Economics**

Hey! I'm doing an assignment in which I need to research a company (Qantas)and its performance on the ASX (Australian Securities Exchange). I know that some sources of information will be the Qantas website and the ASX website but are there any other websites maybe relatin...

**us history**

What exactly do you need help with? Structure? How to frame your research?

**business**

You mean the four p's Product, Place, Promotion and Price

**Copyright**

Hey! Is it illegal under copyright law to record sections of a video so that you can use the quotes in an assignment about the video but then delete the sections after you've used them?

**Speechwriting**

Hi. How can I start a speech without saying goodmorning ladies and gentlemen? But not sound rude...

**Solving Geometry Problem - PLEASE HELP - Test tom!**

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

**math**

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

**Chemistry**

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added

**Chemistry**

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added

**Math**

Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?

**Math**

Karla walks 8/10 mile to the library. About how many miles does she walk?

**Chemistry**

Given the following information: Ag^+(aq) + Cl^-(aq)<-->AgCl(s) Keq=1.8x10^-1 Ag^+(aq) + 2NH3(aq)<->Ag(NH3)2^+(aq) Keq=8.2x10^3 Explain why the AgCl(s) dissolved when NH3 was added to the test tube.

**Roper**

The length is 3.8m, the diameter is 0.19

**Math**

What angle equal to 6/8 turn?

**math**

Can you explain a little more on equivalent fractions with common denominator 3/4, 2/3, 7/8 thank you verry much.

**math**

Find equivalent fractions with a common denominator and order from least to grestest 1/2, 4/9, 4/18

**math**

Equivalent fractions 1/2,6/10,9/27,4/16

**chemistry**

how do you find the Kc of a reaction?

**chemistry**

what is the pH if you mix 250ml of 3M HCl with 500ml of 1.5M CN-? i know that: HCl+CN- ---> HCN+Cl- 250ml converts to .75 moles and 500ml also converts to .75 moles when using the 3M and the 1.5M. Ka=X^2/m-x x/1000=.015/750 .02 CN- left. 2.5*10^5=x^2/(.02-x) 2.5*10^5(x^2/(....

**chemistry**

At 2010K, the equilibrium constant Kc is 4*10^-4 for the following: N2+O2-->2NO If the equilibrium concentration of N2 is .28M and O2 is .38M, what is the equilibrium concentration of NO? a)1.8*10^-9 b)2.1*10^-5 c)4.3*10^-5 d)6.5*10^-3

**calculus**

Under what conditions for f'(x) and f''(X) can a graph be " straight" wthout being horizontal?

**Chemistry**

Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal number of gas particles....

**physics??**

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the star? (b) What i...

**PHYSICS CIRCULAR MOTION**

In an automatic clothes drier, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.364 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of è ab...

**physics circular arc**

A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 68.0 m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.

**physics**

A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...

**Physics circular motion**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at t...

**PHYSICS**

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...

**physics1**

A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is the coefficient of ...

**Physics AP**

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings toward the outside of the...

**physics??**

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a person situated (a) at t...

**physics!**

A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the b...

**physics (centripetal acceleration)**

The second hand and the minute hand on one type of clock are the same length. Find the ratio (ac,second/ac,minute) of the centripetal accelerations of the tips of the second hand and the minute hand.

**Chemistry**

Reactions can be speeded by increasing the proportion of reactant molecules which collide with proper orientation. This can be accomplished by......... A)compressing the reactant mixture. B) heating the reactant mixture. C) addition of a catalyst. D) cooling the reactant mixt...

**Chemistry**

Reactions can be speeded by increasing the proportion of reactant molecules which collide with proper orientation. This can be accomplished by......... A)compressing the reactant mixture. B) heating the reactant mixture. C) addition of a catalyst. D) cooling the reactant mixtu...

**Chemistry**

A student dissolves 2.57 grams of iodine [molar mass= 257]in 10.0 grams of carbon tetrachloride [kb = 5.03C/m]. The normal boiling point of carbon tetrachloride is approximately 77degreesC. What is the approximate boiling point of the solution above?

**calculus**

What single deposit today in an account paying 7% interest compounded continuously would yield $18500 in 10yr?

**math**

5,5,5,10,10,10,15,15,15,15,20

**chem**

Jen, I know 2.62g is NOT the answer. That is what I came up with as well but it is incorrect.

**Chemistry**

A 22.5 gram sample of ammonium carbonate contains ? mol of ammonium ions?

**chemistry**

Alkali metals react with water to form hydrogen gas and the hydroxide of the metal. When 3.55 grams of an alkali metal reacts with excess water, 1020ml of hydrogen gas, measured at STP, are evolved. What is the alkali metal?

**chemistry uvu **

12.75 g less than the theoretically predicted mass of 25.69 g, what is the percent yield of this reaction?

**chemistry**

According to the following reaction, how many grams of copper(II) chloride are necessary to form 0.984 moles silver chloride? silver nitrate (aq) + copper(II) chloride (s) silver chloride (s) + copper(II) nitrate (aq)

**Physics**

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...

**Physics - Height of ball launch**

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol stated above along with...

**Physics**

A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.

**Physics**

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.0 m, the bottom of the wheel is 1.9 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each othe...

**Physics**

A centrifuge in a medical laboratory rotates at an angular speed of 3500 rpm (revolutions per minute). When switched off, it rotates 70.0 times before coming to rest. Find the constant angular acceleration of the centrifuge. (Assume the initial direction of rotation is the pos...

**Physics**

What is the centripetal acceleration of the Moon? The period of the Moon's orbit about the Earth is 27.3 days, measured with respect to the fixed stars. The radius of the Moon's orbit is RM = 3.85 · 108 m.

**Physics**

At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 14.6 m, the bottom of the wheel is 1.1 m above the ground and its rim is moving at a speed of 1.0...

**Physics**

Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie o...

**Physics**

A man with a mass of 65 kg stands up in a 64-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe mo...

**algebra**

How do I solve problems similar to: 2/3X - 1/2Y = 3

**chemistry**

The boiling point of water at 735mmHg is 99.073C. What mass of NaCl should be added to 3.11kg water to increase the boiling point to 100.000C. Kb for water = 0.510K kg mol-1.

**math**

you welcome :) glad i could help!

**math**

(6+6)/(6)*(6+6)=24

**computers**

i dont understand the formula for caluculating e^x in order to write the code(java)

**computer science**

I dont understand the formula :/ im writing in java

**computer science**

I dont understand the formula :/

**computer science**

Write an application that calculates the value of e^x by using the following formula:e^x=1+(x/1!)+(x^2/2!)+(x^3/3!)... Allow the user to enter the number of terms to calculate

**stats**

There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a stu...

**finance**

cpu company currently pays a divdend of $2.50. dividends are expected to increase at the rate of $.25 per share for the next several years. determine the current rate of CPU's common stock to an investor who expects to be able to sell the stock for $35 per share after 3 ye...

**statistics**

soo ive got the porpotion. Do i have to do anything with that or is that my answer???

**statistics**

on the table thingy... do i use 1.90 and 2??

**statistics**

but i cant find the proportion for a z-score of 1.98

**statistics**

The weights of individual nails produced by the 'Hammer 'n Nail' hardware company follow a normal distribution with the average nail weight being 5.1 grams and the standard deviation in nail weight being 1.6 grams. When a nail is produced it is discarded if it weig...

**Math**

You are a share analyst for an investment firm and are investigating the return on shares in the Eastern Mining Corporation over the last four years. The return on Eastern Mining Corporation shares over the last four years is presented. Calculate the geometric mean rate of ret...

**Math**

Supply the missing numbers. Round any decimal to the nearest thousandth and percent to the nearest tenth of a percent if necessary. fraction decimal percent 12percent

**ghemistry**

which indicator is more reliable in the titration of H3PO4 with NaOH using methyl orange and phenolphthalein as indicators

**Physics**

A small blimp is used for advertising purposes at a football game. It has a mass of 93.0 kg and is attached by a towrope to a truck on the ground. The towrope makes an angle of 53.3° downward from the horizontal, and the blimp hovers at a constant height of 20.7 m above th...

**Physics**

A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.195, and the mass of the sled, including the load, is 209.8 kg. If the horse moves the sled at a constant speed of 1.730 m/s, what is the power needed ...

**Physics**

A spring with a spring constant of 223.9 N/m is compressed by 0.220 m. Then a steel ball bearing of mass 0.0372 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the spring? (The ball be...

**Physics**

An ideal spring has the spring constant k = 464 N/m. Calculate the distance this spring must be stretched from its equilibrium position for 26 J of work to be done. 1

**Physics**

A particle of mass m is subjected to a force acting in the x-direction. Fx = (3.2 + 0.55x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.5 m. 1

**Physics**

You push your couch a distance of 3.8 m across the living room floor with a horizontal force of 180.0 N. The force of friction is 136.0 N. What is the work done by you, by the friction force, by gravity, and by the net force? you 1 friction force 2 gravity 3 net force 4

**Physics**

Two baseballs are thrown off the top of a building that is 7.24 m high. Both are thrown with initial speed of 63.3 mph. Ball 1 is thrown horizontally, and ball 2 is thrown straight down. What is the difference in the speeds of the two balls when they touch the ground? (Neglect...

**Physics**

Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 4.54 m/s, they then have the same kinetic energy. Calculate the original speeds of the two cars. first car 1 second car 2

**maths**

Yes, altitude change is what I am trying to find, sorry I didnt make that clearer earlier

**maths**

Yes, that's exactly i am looking for, sorry i didnt make that clear earlier

**maths**

hi how would you calculate altitude given airspeed, rate of descent and time? thank you!

**Physics**

The position of an object as a function of time is given as x = At3 + Bt2 + Ct + D. The constants are A = 3.2 m/s3, B = 1.8 m/s2, C = −4.2 m/s, and D = 7 m. At what time(s) is the object at rest?

**Physics**

A rabbit runs in a garden such that the x- and y-components of its displacement as function of times are given by x(t) = −0.44t2 − 6.0t + 73 and y(t)= 0.35t2 + 8.3t + 34. (Both x and y are in meters and t is in seconds.) (a) Calculate the rabbit's position (mag...

**Physics**

Some rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and, during the time interval from 0 to 10 ...

**Physics**

You serve a tennis ball from a height of 1.8 m above the ground. The ball leaves your racket with a speed of 19.4 m/s at an angle of 7.28° above the horizontal. The horizontal distance from the court's baseline to the net is 11.83 m, and the net is 1.07 m high. Neglect...

**Physics**

For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 16.0 m/s and initial angle of 36.8° with respect to the horizontal. (a) Where will the golf ball fall back to the ground? (...

**Physics**

A golf ball is hit with an initial angle of 30.5° with respect to the horizontal and an initial velocity of 81.9 mph. It lands a distance of 86.8 m away from where it was hit. By how much did the effects of wind resistance, spin, and so forth reduce the range of the golf b...

**accounting**

What role might an accounting professional play in ethical corporate decision making? Should an accounting professional play a role even when he or she is not the final decision maker? Explain your answer.

**mat115**

A pack of 250 key blanks costs $23.50. What is the unit price? I know that this is .094 but I am having trouble with the remaining 2 parts. If each cut key costs a customer $1.75, and it takes 2 minutes for Darren to cut a key, how much does Darren make per hour? If Darren, as...

**math**

If a ball is dropped from from 288 ft above the ground, how long does it take to reach ground level?

**math**

A pack of 250 key blanks costs $23.50. What is the unit price? If each cut key costs a customer $1.75, and it takes 2 minutes for Darren to cut a key, how much does Darren make per hour? If Darren, as the business owner, pays himself $800 per week, how much profit (or loss) is...

**Physics**

A machine carries a 3.0 kg package from an initial position of di = (0.50 m) + (0.75 m) + (0.20 m) at t = 0 to a final position of df = (7.30 m) + (11.0 m) + (7.20 m) at t = 14 s. The constant force applied by the machine on the package is F = (2.00 N) + (4.00 N) + (6.00 N) . ...

**economics**

how might these trade restrictions on imported goods affect the japanese economy

**principles of management**

memo to a superior indicating that person’s strengths as a manager. Include a tactful recommendation regarding one thing they could do differently to be even more effective as a manager.

**environmental science**

i would like to know what three consequences (one at each level: individual, community, and population) that may occur with each of these resources if these resources become limited.? The resources i came up with are water, food, shelter, resilinence, and humans. Ithink these ...

**environmental science**

yes i would love for some help on this.

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