Tuesday

July 29, 2014

July 29, 2014

Total # Posts: 214

**physics**

A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800 rad, starting from rest, gaining angular speed at the constant rate α1 through the first 400 rad and then losing angular speed at the constant rate -α1 until it is again at rest. The ...

**chemistry**

a student needs to prepare an aqueous solution of sucrose at a temperature of 20 degrees c with a vapor pressure of 15. 0 mm Hg. How many grams of sucrose (mm=342 g/mol) does she need if she uses 375 g H20? (the vapor pressure of water at 20 degrees c is 17.5 mm Hg)

**physics**

I'm just having trouble setting up this problem. It's based on a picture so I'll describe it: There is an open ladder standing on the floor with a person on the third step on one side. There is a crossbar attached to the two sides of the ladder and the floor is fri...

**physics**

A boat floating in fresh water displaces water weighing 35.6 kN. (a) What is the weight of the water this boat displaces when floating in salt water of density 1.10 x 10^3 kg/m^3? (b) What is the difference between the volume of fresh water displaced and the volume of salt wat...

**physics**

A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.71 of the person's regular weight. Calculate the acceleration of the elevator, and find the direction of acceleration.

**physics**

An elevator (mass 4175 kg) is to be designed so that the maximum acceleration is 0.0700g. What is the maximum force the motor should exert on the supporting cable? What is the minimum?

**MATH**

Divide. Round to the nearest hundredth if necessary. 0.00829/0.003 my answer: 2.76 Is this correct

**Physics**

a book weighs 4 N. When held at rest in your hands, the net force on the book?

**physics**

You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 75 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient o...

**geometry**

In triangle ABC, if line BC is one inch longer than line AB, line AC is 10 inches shorter than the sum of line BC and line AB , and the perimeter of triangle ABC is 72 inches, find the length of line BC?

**bioethics**

For my bioethics class I need to create a "political" cartoon about clinical trials. (I say "political" because it's not really about politics, just the general format of a political cartoon.) I was trying to think of something related to placebos maybe...

**bioethics**

I need to create a political cartoon about clinical trials. I have no idea what to do. Any suggestions would be greatly appreciated.

**physics**

A ball was shot from the angles given in the table below. The corresponding ranges (landing at the same height from which it is shot) for three trials are given below as well. A. Determine the average range and standard deviation for each angle. B. Next calculate the initial v...

**physics**

During an Olympic bobsled run, the Jamaican team makes a turn of radius 7.6 m at a speed of 96.6 km/h. What is their acceleration in terms of g?

**childcare**

2 is c and 4 is a, the rest are right

**Child care **

the correct answers are 1 b, 2 c, 3a, 4c, 5b, 6c, 7d, 8d, 9b, 10c, 11c, 12d, 13b, 14c, 15b, 16c, 17a, 18d, 19d, 20c

**Child care **

actually i just took it and got a 60. 14 c 15 b and colleen is right will post the correct answers as i get them but 1, 5, 8, 12, 16, 17, 19, 20 are wrong. i have to wait until tommorow to retake.

**Math**

What quadrants are x>0, x<0, y>0, & y<0 in on a graph?

**algebra with pizzazz**

What might you have if you don't feel well? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .GLOVESDOWN ___________ the first space is empty.

**Math**

Use the method of Gauss to find the sum. 2+4+6+...+300 is it 300(300+2)/2 = 45300

**math**

use the method of Gauss to find the sum. 2+4+6+...+300 is it 300(300+2)/2 = 45300

**math**

Solve the equation: 2x/5-x/3=3 How do u do this? Thank You!!!

**MATH**

Consider the experiment of rolling a single die. Find the probability of the event described.What is P(number showing is not odd)?

**Math**

Thank you

**Math**

that ã sign suppose to be a square root sign but its not coming out right

**Math**

(3ã2 + 4)^2 (3ã2 + 4)(3ã2 + 4) 9ã4 + 12ã2 + 12ã2 + 16 9*2ã2 + 12ã2 + 12ã2 + 16 18ã2 + 12ã2 + 12ã2 + 16 = 42ã...

**Math**

One grocery clerk can stock a shelf in 40 min, whereas a second clerk requires 20 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together? Is this how you do this: t/40 + t/24 =1 t*3/40*3 + t*5/24*5 =1 3t/120 + 5t/120 =1 (8t/120...

**Math**

One grocery clerk can stock a shelf in 40 min, whereas a second clerk requires 20 min to stock the same shelf. How long would it take to stock the shelf if the two clerks worked together? Is this how you do this: t/40 +t/24 =1 t*3/40*3 + t*5/24*5 =1 3t/120 + 5t/120 =1 (8t/120)...

**Math**

Thanks

**Math**

A plane can fly 140 mph in calm air. Flying with the wind, the plane can fly 700 mi in the same amount of time it takes to fly 420 mi against the wind. Whats the rate of the wind?

**math**

Give the dimensions of a picture frame that is a golden rectangle.

**math **

A graphics designer wants to use a star-shaped polygon with 10 points and a point angle of 12 degrees. What should be the dent angle of this polygon?

**5th grade math**

The length of a rectangle is a multiple of 5in. The width is 4.8 in. The area is between 80in.2 and 100in.2 What is the length of the rectangle? I an really confused on this problem! Please help & explain. thanks

**Algebra**

Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help me

**Algebra**

Flying with the wind, a small plane flew 360 miles in 2hours. Against the wind, the plane could fly only 300 miles in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. I cant figure out how to solve this. Please help me

**5th grade English**

Thanks soo much!

**5th grade English**

You should take it with you. Is "you" Singular or plural? At first is thought is was singular but know I really don't know. Was I right at first?

**5th grade English**

He gave us thirty seconds to think about it. Is the word IT singular or a plural pronoun? I thought it was both...but could it actually be BOTH? because it doesn't give it antecedent.

**5th grade math - multiplying decimals **

Marlon's desktop measures 0.57 meters by 1.45 meters. that is the ares of his desktop? I came up with .8265 is this correct? I thought that the answer should be more than one.

**5th grade fractions**

How do I find a number that when divided by 2/3 gives me a quotient between 1/3 and 3/4

**5th grade fractions**

Attendance at the Fireman's Ball has been declining. Each Year, the number attending is 2/3 of the previous year's attendance. In what year will the attendance be less than 1/3 the original attendance?

**5th Grade fractions**

Walt has a piece of rope which is 10 1/3 feet long. He has to cut it into 4 equal pieces. How long will each piece be? I took 10 1/3 divided by 4 which is 2.58333. How can I explain this to my 5th grader in fractions?

**5th grade fractions**

I don't know how to figure..24 girls at the picnic..2/5 at picnic were boys. How many students at picnic?

**social studies**

i dont know where king charles the first gave the puritans a charter to setle in

**5th grade**

The LCM of two numbers is 120. The GCF is 6. One number is 6 more than the other. What are the numbers. Can someone please explain how to get the answer?

**5th grade Math**

If a number has an odd number of factors, why can the number always be represented by the expression n2?

**chemistry**

At 2200°C, K = 0.050 for the following reaction. N2(g) + O2(g) 2 NO(g) What is the partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.76 and 0.27 atm, respectively?

**chemistry**

1.5 mol pure HOCl is placed in a 2.7 L flask.

**chemistry**

For the following reaction at a certain temperature, it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2] = 0.0500 M, [F2] = 0.0100 M, and [HF] = 0.400 M. If 0.261 mol of F2 is added to this equilibrium mixture, calculate the concentrations of a...

**English**

I have a question. When your using a quote is it if it's 5 or more lines its indented in 5 spaces and if it's 4 or less lines it goes into your paragraph. How does that go again.

**Any Help w/5th grade math**

Confused..The grocery store stocks 3 brands of yogurt. The store sells two containers of Brand A yogurt for every one container of Brand B or Brand C Yogurt. If the store sells 100 containers of yogurt a day, how much of each brand of yogurt do they sell? Answer: A=50, B=25, C...

**5th Grade Math**

Confused..The grocery store stocks 3 brands of yogurt. The store sells two containers of Brand A yogurt for every one container of Brand B or Brand C Yogurt. If the store sells 100 containers of yogurt a day, how much of each brand of yogurt do they sell? Answer: A=50, B=25, C...

**psychology**

I believe the answer is B.

**math**

What are good sites to study ratios in math?

**Literature**

Sorry Hostility of the marginalized?

**Literature**

What is hostility of the margin?

**Literature**

Explain how the biography of an artist can impact a work?

**Science**

Suppose you are on a ship somewhere in the Atlantic Ocean. You take sightings on Polaris and find that it's altitude is 52 degrees. You're told that a certain star is on the prime meridian at midnight Greenwich time. This star is on your meridian at 4 A.M G.M.T What is...

**Science**

Thank you very much!!

**Science**

On the surface of the Earth, it is approximately 6,200 miles to the North or South pole. How many miles is it between two parallels 5 degrees apart?

**5th Grade English**

Should I capitalize indians in a sentence? Example - The indians live in the southwest. Another one has me confused, I played with Mexican jumping beans. Should I capitalize mexican jump beans? Thanks any help will be great.

**math**

what is the greatest 3-digit number you can write whose digits have a sum of 20? i came up with 992 do you think it's right?

**5th Grade Math**

i think i have it. 0.32 thanks

**5th Grade Math**

Marla has 16 nickles and pennies. She has 3 times as many pennies as nickels. What is te total value of the coins? I don't know how to come up with home many nickels..Can someone help?

**ADVANCED HEALTH CARE**

DESCRIBE TWO APPROACHES OR INDICATORS TO MEASURING PATIENT OUTCOMES

**ADVANCE HEALTH CARE**

not much i have been looking on the internet, but can not find a good site

**ADVANCE HEALTH CARE**

what are the advantages an disadvantages for HMO, MANAGED CARE, PPO, POS, AND TRICARE?

**ADVANCE HEALTH CARE**

WHAT IS THE PURPOSE FOR HEALTH INSURANCE?

**ADVANCE HEALTH CARE**

HOW DID HEALTH INSURANCE BEGIN?

**ADVANCED HEALTH CARE**

DESCRIBE THREE CAUSES FOR THE INCREASING COST OF HEALTH CARE.

**ADVANCE HEALTH CARE**

What are the economic advantages to government involvement in health care? What are the economic disadvantages? What are some ways of curbing the negative impact of rising health care costs on an economy?

**ADVANCE HEALTH CARE**

In what ways do health care effect an economy?

**9th Grade Biology**

Has plant life on earth evolved and have rose bushes always been around on earth?

**Algebra 1**

I need help simplifying these expressions. 1/3 + 2/x= 3/x 2/5 - 3/x=1/5x 3/x+1 - 1/x=1/2 4/x+1=3/x+2 x/x+3= x-2/x 2x^2-4x/x-2 5x/2 times 1/x 12x/5 divided by 6x/7

**5th grade**

Pleasee! I have a worksheet with me and i need to know how to do range and mode, somebody please tell me!

**math**

sorry!! range***

**math**

please!!! i forget!! how do u do rnage? How do u do mode?!?!

**5th grade Math**

th awnswer is this 1/2

**Latin**

Whoops I forgot I posted this before I apologize

**Latin**

I'm just a little confused about this translation my book gave me. My book said "Litteris victoriam nuntiant" means they report the victory by means of a letter. Wouldn't this be they report the victory by means of letters? Am I incorrect or is the book? Than...

**Latin**

My book says the setence "litteris victoriam nuntiant" means they report the victory by means of a letter. Why is letter pluralized in this sentence? Thank you.

**Chemistry**

Thanks for the explanation. WOuld the answer then be 10.23?

**Chemistry**

Would you mind checking these mole/unit conversion problems over? I understood them in class today, but that was hours ago, so now I need to start all over again. How many moles of GaBr3 are in 983 grams? I got 983g times 1mole/309.42, which equaled 3.18. Is this correct? If n...

**Chemistry**

Thank you so much. That was really easy to understand.

**Chemistry**

I am figuring out how many moles of CU2SO4 are in 485.6 grams. How would you set up the proportion for this? What would the answer then be. Thanks. I really need an example to jumpstart this worksheet.

**Science**

I am balancing out ions. If you have Zn^2+ and PO4^-3, would they balance out to Zn3 (PO4)^2? Thanks for checking this.

**Chemistry**

I was reviewing chem equations online. This one site said this is a balanced equation. I don't see why there are 13 oxygens! thirteen times two would equal 26, and there aren't 26 oxygens on the other side. Who's correct and why? Thank you for your help. 4C2H5F+13O...

**math**

same problem and the only reason someone would cuss would be because they are stupid and do not know what kind of words to use. so there~

**calculus-optimazation**

The sum of the perimeters of an equliateral triangle and square is 10. Find the dimensions of the triangle and square that produce a minimum total area.

**Algebra**

Snape has 2000 mL of a magic potion that is 30% DeMuggle Juice. He also has hundreds of 25 mL bottles that are full of 75% DeMuggle Juice solution. Every time he waves his wand, one of these bottles is added to his magic potion. How many times must he wave his wand to have a s...

**Algebra**

Graph the inequality 4x - y/2 < 6. I don't know how to start... would multiplying each side by 2/1 work? Thank you!

**social health**

what are the definitions of the three health things on the triangle??

**english**

thank you so much for your help!

**english**

thanks is it do know?

**english**

know the meaning?

**english**

what is the verb phrase in this sentence-Do you know the meaning of its letters?

**english**

okay thankyou!

**english**

which principle part of the verb hear is used in this sentence-You problably have heard the name unesco

**Math**

i got -7 1/7 thankyou!

**Math**

What is te result when the reciprocal of -1/7 is increased by the negative of 1/7?

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