Thursday

April 24, 2014

April 24, 2014

Total # Posts: 895

**physics**

hello, I need some help with this work problem that goes... If the height of a helicopter above the ground is given by h=3.25t^3, where h is in meters and t is in sec. After 1.50s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the g...

**physics**

a = (deltav)/t = (d/t)/t =(400/10) / 10 =4m/s :)

**Maths - trig**

Solve 3cos2x - 7cosx = 0, when 0<=x<=360 And also, find the exact values for x when 0<=x<=360 if 3tan^2x=1 Thankyou!

**physics**

Devon : a = F / m Effective F = upward force - downward force (weight) = 11- 15.5 = 4.5 downward a = 4.5/ (15.5/9.8) = 2.8 m/s downwards. (I'm pretty sure anyway)

**physics**

Yes if the upward force is less than gravitythen the acceleration would be downward, but it wouldn't be negative as it's not a deacceleration. :)

**Chemistry**

Balance the eqn Na2CO3 + 2HCl -> 2NaCl +H20 + CO2 From the balanced eqn you can see that one mole of CO2 is produced. Then at stp 1 mole of gas takes up 24 litres (I think, check this on google) therefore v= 24 litres. :)

**PIs 267**

How much work is need to raise a 110 kg loag of bricks 12m above the ground

**geometry**

Solve the equation for x. -5x = 3 + y is it x = (3+y)/-5

**Math**

wait there is no x after the seven its just 3x + 23 = 7 so x = ?what?

**Math**

If triangle XYZ is equilateral and the length of one side is 7.5, what is the perimeter of XYZ and what is the measure of each angle?

**Math**

Soda comes in packs of 6. Candy comes in 4 bags per pack. What is the least number of each pack (Soda and Candy) she must buy to have exactly one soda per bag of candy?

**6th grade, social studies**

who is discussed in the biography feature of chapter 6,lesson 1

**Math**

How is 3x2 different from 3 to the 2nd power ?

**chemistry**

You mix 2.0 mL of 0.50 M Cu(NO3)2 with 5.0 mL of 0.50 M KI, and collect and dry the CuI precipitate. Calculate the following: a) Moles of Cu(NO3)2 used b) Moles of KI used c) Moles of CuI precipitate expected from Cu(NO3)2 d) Moles of CuI precipitate expected from KI

**Physics**

thank you. can you help me solve another?

**Physics**

Two cars travel at the same constant speed. The first car travels for 10 minutes, the second for 27 minutes. If the second car travels 18 miles farther tht the first, how far does each car travel?

**psychology**

thanks a lot Ms. Sue, it has been a while.

**psychology**

Need two peer reviewed articles to help me work on those questions. below Discuss how social psychology differs from other related disciplines (e.g., clinical psychology, general psychology, sociology). Explain the main types of research approaches/methods and their role(s) wi...

**physics**

An object with uniform motion traveled 265cm in 2.4 seconds. how much time did the object take to travel the last 50cm?

**algebra**

We can determine the time it would take an object to fall (if there were no air resistance) by using the formula where d is the distance. A. How long does it take a quarter dropped from a 35 foot roof to reach the ground? B. If there are 5,280 feet in one mile, how long would ...

**childcare**

5d,8a,13a

**childcare**

1b,2c,5d,8a,13a

**Science**

Thank you !!!!!!!!

**Science**

a certain plant's roots contain higher concentration of nitrate than the soil that surrounds them. Which of the fallowing mechanism explains the movement of nitrate from soil into the plant's roots? Active transport???

**Science**

1-B 2-B 3-C

**Science**

) Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent variable in this invest...

**science**

Maria is preparing an experiment using three cups, one made of paper, one of plastic, and one of glass. She plans on pouring 50 ml of hot water into each of the three cups and recording the temperatures in 5 minute intervals. What is the independent variable in this investigat...

**science**

Maria is preparing an experiment using three cups, one made of paper, one of plastic, and one of glass. She plans on pouring 50 ml of hot water into each of the three cups and recording the temperatures in 5 minute intervals. What is the independent variable in this investigat...

**Science**

a certain plant's roots contain higher concentrations of nitrates than the soil that surrounds them, which mechanism explains the movement of the nitrate from the soil into the plant's roots? is it facilitated diffusion

**Quantitative Analysis**

Payoff tables are more difficult to use than decision trees when?

**Physic**

Brad uses a wheelchair to get in his house.which modification would make it easier for Brad to get in his house? a)increase the length of the ramp b)increase the friction between the wheels and the ramp surface

**Chemistry**

Below are the formulas of some hydrates. what is the mole ratio of salt to water? Hydrate Na2SO4.10H2O Co(NO3)2.6H2O Mo(NO3)2.5H2O CaSO4.2H2O (CaSO4)2.H2) Thankk you

**Chemistry**

A student worked with a sample of ZnSO4.7H2O, what is the stoichiometric ratio of salt to water?

**Chemistry**

mole ratio of Na2SO4.10H2O

**chemistry**

mole ratio of CaSO4.2H2O

**chemistry**

mole ratio of (CaSO4)2.H2O

**statistics**

a. 50% b. 0.84 c. 97.72%

**geometry**

how can i identify iif it is coplanar,collinear or neither

**english**

need help with tefl unit 6 the whole of it

**english**

identify the folowing tenses give reasons for identification. i have never met any body famous john is having a shower at the moment i go shopping at least twice a week i have been working herefor 10 years

**english**

How , what, and when would you correct mistakes/errors made during the following stages ENGAGE STAGE, STUDY STAGE, ACTIVATE STAGE

**algebra**

4(2x+y)-3(x-5)

**algebra**

using the quadratic formula, how do you solve 2p^2 + 16p = -2p^2 + 3?

**math**

The price of an antibiotic decreased from $86.25 to $52.75 for a bottle of 100 tablets. Find the ratio of the decrease in price to the original price.

**business**

What are some of the best practices or etiquette that should be followed when writing business e-mails. How is the Web affecting the way business is conducted? Are there changes in business practices that apply to a virtual company?

**ethnic studies**

what is a good definition for individual discrimination?-...... I am trying to contrast it from institutional discrimination and I am finding it to be complicated, Thanks

**intro to business**

No one can predict a natural disaster or world crisis. When a hurricane or flood or a pandemic strikes a country, who is most likely to respond first? Which economic system is the best solution to handling a crisis of epic proportion?

**race and ethnicity**

what can be the best way to explain the differences between exclusion and segregation??- Thanks

**english**

what are the five basic clues or signals that awriter can use yo guide readers through a peice of writing

**statistics**

Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. (0.1 point) Percentage of scores...

**psychology**

need to identify at least four key milestones in the development of cognitive psychology as a discipline, need some data to help me discuss this question

**anatomy**

If a person has stopped breathing and is recieving pulmonary resuscitation would it be better to administer pure oxygen or a mixture of oxygen and carbondioxide?

**anatomy**

If a person has stopped breathing and is recieving pulmonary resuscitation would it be better to administer pure oxygen or a mixture of oxygen and carbon dioxide?

**Life orientation**

Any human or enviromental problem and the community is Mamelodi

**psychology**

Can I please have some information to help me discuss this question beloww: Analyze at lease two research methods used for uncovering basic emotions

**Intermediate Algebra**

Used ASCII Character Solve for X 5=6x+ 6x=5-9 6x=-4 x=-2/3

**Intermediate Algebra**

Solve this please 5=6x=9 6x=5-9 6x=-4 x=-2/3

**statistics**

At a ski area in Vermont, the daytime high temperature is normally distributed during January, with a mean of 22°F and a standard deviation of 10°F. You are planning to snowboard there this January. What is the probability that you will encounter daytime highs of a) 42...

**Math**

isnt it the sum of the X's squared divided by n or the sample?

**ap government**

What was the Roosevelt court-packing plan? What does it suggest about the relationship between the Supreme Court and the other branches of government?

**algebra**

A student opens a math book to two facing pages.The product of the page numbers is 210.Find the page numbers. The first page is _________ The second page is________

**history**

thank you.. oh i meant to write "food-aid" all in one term... I also have another question.. where can i find information about the affect of lives of people in the colonies during the 2oth century due to capitalism? thanks..

**history**

For my history class I need to identify these terms but do not know where I can find more info about them to make my answer a page long for each... these terms are.. FOOD AID and the Soviet-Afghan War that occured during the 20th century.. thanks

**psychology**

Mrs. Sue, The first question is as follows: Analyze how neuro processes effect behavior and impact the field of biological psychology. the following question must be addressed Describe the role of postsynaptic potentials, synaptic transmission, and receptors in producing and r...

**psychology**

Miss Sue, How are you? It has been a while. Thank you so much for your help. Have a nice evening

**psychology**

Working on a paper entitled: neurological processes. Would like to have some data to help me work on it. Thank you very much.

**Using the factor Theorem**

thank you so much dear mate, yes i took your advise and indeed i got it as a factor:) thank you.

**Using the factor Theorem**

use the factor theorem to determine whether x-c is a factor of f(x) f(x)=x^3+8x^2-18x+20; x-10 I have a doubt in my answer, i determined that x-10 is not a factor... am i right? please verify as my exam is tomorrow night at college. thank you for your time and hard work:)

**english**

thanks again!! :)

**english**

A primary concern is the substantial risks to women's health posed by the extraction procedure and the inability to obtain true informed consent from egg donors given the current lack of adequate safety data. can someone please break this sentence up to make it more unders...

**english**

i'm writing a persuasive essay about human cloning (against it). do you knw any good articles that has disadvantages and risks of human cloning? thnx in advance

**AP World History**

I need to write an essay comparing how North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society. Can't find annnyyythinggg on Latin American/ Caribbean racial ideologies and their effects on ...

**statitics**

find the probility that when 4 managers are randomly selected from a group of 20, the 4 oldest are selected

**chem**

The real equation should be something like this: H2S + O2 -> S + H2O Balancing the equation: 2 H2S + O2 -> 2S + 2H2O The question does not mention anything about methane, CH4. Also, The sulfur in the equation (mistaken as methane, i suppose) is one of the product, not th...

**Algebra 1**

How do you graph y=1/2x+1 y=-3x+8

**History**

Hello, I am doing this History project where we are required to differentiate the violence exerted by the great powers in context of New Imperialism and the First World War. The problem is that I am having trouble finding articles that actually talk about the violence that was...

**math**

what are the x-intercepts here? y=x^2+2x-35 y=x^2+2x-48

**math**

(√12 x √16)/√75 √(12/25) how to simplify these?

**Math**

If qrs / r = s and the value of q is 0, which of the following must be true? Explain why. a) r = 0 b) s = 0 c) s / r = 1 d) qr / r = 1 e) s = 2r

**Math**

Choice C. Thanks.

**Math**

Sorry about that but thanks for your help. a) 4 x 1/10 b) 4 x 1/100 c) 4 x 1/1,000 d) 4 x 1/10,000 e) 4 x 1/100,000

**Math**

In the number 0.3645, which of the following does the digit 4 represent? Explain why.

**sew**

This is the taking of extra measurement on the pattern

**math**

3.0970 x 1500.

**math**

which number sentence is 6 fewer than 11

**Math**

I posed a problem and no one helped me to see how to solve the problem. I don't want you to give me the answer, I want to know how to arrive at the correct answer. Again, Ms. Pecho currently owes $637.50 in simple interest on a loan of $25oo at an annual interest rate of 1...

**Math**

Ms. Pecho currently owes $637.50 in simple interest on a loan of $2500 at an annual interest rate of 17%. How long has she had the loan? How do you figure out this problem? I am not merely looking for an answer, I would like to know how to do it to know if he is doing it corre...

**Math**

8th grade math. I cannot help my grandson with his math. I do not understand it myself. It is dealing with percentages. I do not understand it.

**8th grade**

I see no school subject box

**8th grade**

Math. I thought it was understood when I said math homework and the question asked about percentages.

**8th grade**

Ms Pecho currently owes $637.50 in simple interest on a loan of $2500 at an annual interest rate of 17%. How long has she had the loan. This is his problem and I have no clue how to help him but I do know the answer he came up with is 18.77. That seems wrong to me.

**sewing.**

1.B 2.A 3.D

**psychology**

Thanks a lot Ms. Sue, It has been a while. How are you?

**psychology**

Ms. Sue, could you help me find some data to answer the question below. What are both the advantages and disadvantages of classifying mental disorders into types and maintaining such taxonomy for clinical reference ? Explain your answer for both. thank you

**Science**

Can you explain how attractions between molecules could cause polar water to have a higher boiling point than a non polar carbon dioxide?

**college**

This was written the first way. Do you still calculate the same way? Thanks for the help!

**college math**

Decide whether the pair of lines is parallel, perpendicular or neither. 5x+3y=4 3x+5y=5

**algebra**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and B is traveling at 120 mph. Train A passes a station at 9:10 pm. If train B passes the same station at 9:25pm what time will train B catch up with train A?

**algebra**

Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 mph and B is traveling at 120 mph. Train A passes a station at 9:10 pm. If train B passes the same station at 9:25pm what time will train B catch up with train A?

**statistics**

How do you solve this problem? physical therapy reported that it has been estimated that 80 percent of all lower back pain cases are caused by weak trunk muscles. if 15 patients with lower back pain are examined, what's the probability that 1. exactly 10 have pain caused b...

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