Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 115

**Physics**

A 300 kg piano slides 4.4 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.(a) Calculate the magnitude of the force exerted by the man.(b) Calculate the work...

**Physics**

I just found out for part a that you would do: 1075*9.8*230*sin(17.5) which would then equal: 726915 I still need help with part b though.

**Physics**

What is the minimum work needed to push a 1075 kg car 230 m up along a 17.5° incline? (a) Ignore friction. (b) Assume the effective coefficient of friction retarding the car is 0.30?

**Physics**

A 300 kg piano slides 4.4 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. (a) Calculate the magnitude of the force exerted by the man. (b) Calculate the wo...

**Physics 141**

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.50 106 ...

**Physics 141**

A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.60 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has a radius of 8.50 106 ...

**Physics 141**

A snowmobile moves according to the velocity-time graph shown in the drawing. What is the snowmobile's average acceleration during each of the segments A, B, and C? The scale for the time axis is 100 s per increment, and the scale for the velocity axis is 110 m/s per incre...

**Chemistry**

How to separate and isolate the components of barium sulfate?

**life orientation**

5 factors that contribute to hiv aids

**Ashford**

One element generally not found in caste systems is: (Points : 1) the association of one’s social position with one’s occupation. inheritance of one’s status. equal access to wealth. prohibitions on marrying those outside one’s class.

**Mathematics**

The bearing of Q from P is 060¤ while the bearing of R from Q is 150¤ if PQ=QR find the bearing of R from P

**Mathematics**

The bearing of Q from P is 060¤ while the bearing of R from Q is 150¤ if PQ=QR find the bearing of R from P

**Math**

Imagine a country has a population of 210 million. Within the country there are 95 million people who are employed workers, 50 million people incapable of working, and 60 million people capable of working, but not actively looking. Based on this information, what is the unempl...

**Math**

Imagine a country has a population of 210 million. Within the country there are 95 million people who are employed workers, 50 million people incapable of working, and 60 million people capable of working, but not actively looking. Based on this information, what is the unempl...

**Algebra**

a function contains the following four points (4,16),(-9,81),(8,64),(-5,25). What is the possible symbolic representaion (formula) of the function.

**QRB**

Complete the following two problems. Problem 1 The table shows the number of greeting cards that Americans buy for various occasions. Holiday/Event Cards Sold Valentine’s Day 900 million Mother’s Day 150 million Father’s Day 95 million Graduation 60 million Than...

**College Algebra**

How do you solve 3 log(base 2)*(x-1)+ log(base 2)4=5

**Healthcare**

Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).

**statistics**

Write a brief paragraph describing the distribution of the variables, Population in thousands (populatn) and the average female life expectancy (lifeexpf) for the countries. Descriptive Statistics Population in thousands Average female life expectancy Valid N (listwise) N 109 ...

**Chemistry**

Thank you!!

**Chemistry**

A lead atom has a mass of 3.4x10^-9g. How many lead atoms are in a cube of lead that has a volume of 2.00cm^3 if the density of lead is 11.3g/cm^3?

**world literature**

we have to get this done im home schooled and i dont have a teacher at my beck and call all we want is to get help so we can get a good grade on it doesnt help if you ask us more questions when we dont get the material in the first place.....

**social studies**

In _____, the Supreme Court placed limits on gerrymandering by requiring all congressional districts to have roughly the same number of constituents.

**Area Geometry**

Find the area of a decagon with a radius of 4mm. Find the area of an octagon with a radius of 10 cm.

**Math**

Hello, I need help to understand step by step of my math problem. I am not understanding how to get the answer. Thank You for your help Hope

**1st grade**

Born:February 12, 1809 Died:April 15, 1865 Assasinated at the age of 56. Abraham Lincoln, at the age of 33, married Mary Todd, age 23, on November 4, 1842. Betsy Ross made the first American flag in 1776 or 1777.

**Geometry**

A man is sitting by a pool. He looks up at an angle of elevation of 18 degrees at a bird in a nest at the top of a tall tree. Since the man is 200 feet from the bird's tree. How tall is the tree?

**Geometry**

A tool maker is working on a shed roof. He looks down at a 42 degree angle of depression at the shadow of the shed. If his shed is 24 fett tall, how long is the shadow?

**Geometry**

The ramp on the back of a mvoing van is 3 feet high and rises at an angle of 25 degrees. How high is the ramp? Round to the nearest foot.

**4thGrade Math**

Mr. Brown has a piece of hose 11 ft long. He is going to cut it into 15 equal-length pieces. How long will each piece be?

**English College composition I**

This tip always helped me to come up with a thesis statement for an essay: 1-Name the problem and 2-suggest an answer to the problem. Example-Bullying has become a nationwide epidemic; but as parents and educators, we can and should do something about it. The problem is that b...

**Math**

A square flower garden and a sidewalk around the garden have an area of 400 ft2. The sidewalk has a width of 3 ft. What is the length of one side of the flower garden?

**Geometry**

Quadrilateral WXZY is a square. If YX = 30 and WT = 2x – 7, then find the value of x. (Points : 2) 4 18.5 11 15 or Quadrilateral JKLM is a rhombus. The diagonals intersect at N. If the measure of angle JKL is 104o, find the measure of angle JKN. (Points : 2) 52° 104&d...

**physics**

A 29 kg chair initially at rest on a horizontal floor requires a 375 N horizontal force to set it in motion. Once the chair is in motion, a 345 N horizontal force keeps it moving at a constant velocity. The acceleration of gravity is 9.81 m/s2 . a) What is the coefficient of s...

**fundamental of organizational communication**

by helping me come up with a communication scenario

**fundamental of organizational communication**

can some assist me with this assignment? It is time to choose an organizational communication scenario to use as the case study for your final project. Most learners choose a problem or issue they are experiencing at their current workplace, but you may use any of the followin...

**science**

Listed below are six mixtures. Identify physical properties of the components that allow you to separate them. Then, explain the method you would use to separate the components. Mixture 1: Salt dissolved in water Physical Properties: Density Method of Separation: Use a spoon t...

**Statistics**

95% CI = (6.21, 7.69)

**Statistics**

I have provided information from #3-5 in order to answer #6.. 3. Give the mean for the mean column of the Worksheet. Is this estimate centered about the parameter of interest (the parameter of interest is the answer for the mean in question 2)? The Mean for Column “mean&#...

**Statisitcs**

I have given you the information from 2-4 in hopes to help with the answer for #6.. Thank you! 2. Calculate the mean and standard deviation of the probability distribution created by rolling a die. Either show work or explain how your answer was calculated. x 1 2 3 4 5 6 sum p...

**Statistics**

Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956

**Statistics**

Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956

**Satistics**

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability? Standard deviation of Mean = 0.476169 Standard deviation of Median = 0.753937

**Statistics**

If someone gives you a sample mean and a standard deviation, you can find a confidence interval. But what if someone gives you the confidence interval instead and asks you to find the sample mean? How can you do that? Here's an example: a 95% confidence interval for a mean...

**science**

A certain infant analgesic medicine has a single dose of 36.0 mg/kg of body weight. How much analgesic will be administered in a single dose for an 18.4 pound toddler

**chem**

the answer to this question is d :)

**statistics**

Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have. Your boss has asked you to put together a report showing the relationship between these two variables. What could you prese...

**geometry**

find the area of the equilateral triangle if a side is 8 radical 3m. round to the nearest who number

**math**

Find the GCF of the polynomial 44x^6+8x^5

**math**

so a=40 and c=35 what is b? of a right triangle. i know you use a^2+b^2=c^2 and i know where to put the information, but i dont know what to do after.

**math**

i mean approximate* not appropriate.

**bunn high**

find the approximate length of the leg of a right triangle with one leg length 8 and hypotenuse lenth 19

**bunn high**

the length of a right triangle. find the hypotenuse if a=5 b=14 (legs)

**Bunn high**

write an equation for the line that is parallel to the given line and that passes through the given point y=1/2x-8; (-6,-17)

**statistics**

For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size- (b) 3.

**writing**

i dont understand what u said, writeteacher. can you show me? Can u proofread and show me how to fix me my writing? Philip Malloy Have you ever watched the movie? In the story, “Nothing but the truth,” by Avi, a boy named Philip Malloy had many traits to describe his...

**Writing**

Can you show me how you would write this writing and il go back and do it myself?

**Writing**

Can you proofread my writing? Philip Malloy Have you ever met a devious little boy? Well, I have. In the story “Nothing but the truth,” by Avi, a boy named Philip Malloy was very devious. Philip Malloy was a funny person, then a stubborn person. There are many ways P...

**World History**

What freedoms of Napoleon's Day were the French people willing to sacrifice

**Math**

How do you find out what percent one number is of another????

**physics**

Calculate the frequency in hertz and cm-1, as well as the energy in joules and electron volts of an x-ray photon with a wavelength of 4.55 angstroms.

**geometry**

prove that if the lengths of two sides of a and b, triangle are a and b respectively, then the lengths of the corresponding altitudes to those sides are in the ratio b/a.

**chemisty**

A mixture contains only NaCl and Al2(SO4)3. A 1.76-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.126 g. What is the mass perce...

**chemisty**

A mixture contains only NaCl and Al2(SO4)3. A 1.76-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.126 g. What is the mass perce...

**medicine**

Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).

**Conductivity**

the answer is Lower

**Math**

okay so i feel like a dummie for not knowing this but i need the answer FAST! Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5? 1) commutative property of addition 2) distributive property 3) additive identity 4) additive inverse...

**high school (math)**

Match the mathematical expression with its translation. 1. the product of two numbers 2. y divided by x 3. six less than a number is y 4. x subtracted from y 5. the sum of two numbers is six 6. x minus y 7. the sum of x and y 8. x divided by y 9. six times a number equals y 10...

**chemistry**

please help me out

**chemistry**

Suppose 70.00 mL of a lithium hydroxide, LiOH, solution requires 55.42 mL of a 0.1050 M solution of propanoic acid, C2H5COOH, for neutralization. LiOH + C2H5COOH ® C2H5COOLi + H2O What is the concentration of the base solution? 0.08313 M 0.1663 M 0.3325 M 0.6650 M Question...

**5th grademath**

a group of fifth grade students are going camping. They will hike from Wellington to Ruapehu. Then they will follow a trail for another 1/2 mile to their campsite. The distance from Wellington to Ruapehu is 200 miles. About how long would it take the students to arrive at thei...

**math**

a group of fifth grade students in New Zealand are going camping. They will hike from Wellington to Ruapehu. Then they will follow a trail for another 1/2 mile to their campsite. I was able to calculate the distance from Wellington to Ruapehu by using the map scale. It is 200 ...

**9th grade**

How do i solve this? Write a rule for the function. Input,x 0 1 2 3 Output,y 3 5 7 9

**ART**

Megan did you find the right answer for the Art History from August 5,2010. If you do can you share it with me? I have the same questions and it is kind of hard for me do to English is my second language. Thanks

**math**

The answer is B Explanation: 3/20*2/19*1/18=1/(3*20*19)=1/1140

**social studies**

what is the difference between Union and Seccession ? In 1860

**algebra 2**

Boiling Lake is a small lake on the island of Dominica. The water temperature of the lake is between 180*F and 197*F. Write a compound inequality for this temperature range. [Graph the inequality.]

**7th grade**

i need help on Chemistry and i am in 7th grade i don't know how to do some problems and i would like to know how to translate statements into equation form?

**physics**

A 1.6 kg particle moving along the x-axis experiences the force shown in the figure. The particle's velocity is 4.2 m/s at x = 0 m. The figure or graph has F (N) along the y axis and velocity along the x axis. A diagonal line drops from positive 10 force to -10 force from ...

**physics**

A particle of mass m starts from x subscript o = 0 m with V subscript o > 0 m/s. The particle experiences the variable force F subscript x = F subscript o sin (cx) as it moves to the right along the x-axis, where F subscript o and c are constants. I have answered the first ...

**physics**

A particle of mass m starts from x subscript o = 0 m with V subscript o > 0 m/s. The particle experiences the variable force F subscript x = F subscript o sin (cx) as it moves to the right along the x-axis, where F subscript o and c are constants. I have answered the first ...

**physics**

Please explain to me how to integrate-I am unsure exactly what this means in this problem Thanks

**physics**

A 1.6 kg particle moving along the x-axis experiences the force shown in the figure. The particle's velocity is 4.2 m/s at x = 0 m. The figure or graph has F (N) along the y axis and velocity along the x axis. A diagonal line drops from positive 10 force to -10 force from ...

**science**

A component synthesized by photosynthetic producerrs on which all aerobic consumers depend is what

**algebra**

-6-11x=-136 solve

**math**

what is x+7/4=88

**math**

what is 14,757/67.1

**math**

What is 14,757/67.1

**math**

what is 1/5 times 185

**literature**

B. Spring is a dream unsung.

**algebra/9th grade**

write the equation in slope-intercept form: 1. 18y+2x-9=0 2. 3x-4y=-8

**algebra/9th grade**

decide whether the given ordered pair is a solution of the equation: 1. 3y+12x=-4; (1/5, -35/15): 2. 8-3x+24y=0; (5, 23/24) I think neither of them are. _______ find the x-intercept of the graph of the equation. 3. 13x-24y=-5 --> x=-5/13 4. -14+6y=7x --> x=-2 __ find the...

**math**

how can i find the produt of 17 and 38 using the box method

**Chemistry**

what is the mass of a sample of material given that a 5.03 g sample occupies 3.24 mL

**geography**

what kinds of geographer might be employed by a manufactering company?

**geography**

How does the study of other disciplines help geographers in their work as countries become increasingly interdependent?

**Medical Transcriptionn**

2 part question: When must a new medical employee be trained in privacy practices? What is required if an employee does not comply?

**Algebra**

Use the quadratic formula to solve the equation. Give exact answers: 2x^2 -1 = 6x. The choices are: a) -3 + square root(7)/2, -3 - square root(7)/2 b) 3 + square root(11)/2, 3 - square root(11)/2 c) 3 + square root(7)/2, 3 - square root(7)/2 d) -3 + square root(11)/2, -3 - squ...

**Algebra**

Solve the compound inequality. -9 (less than or equal to) -3x - 9 (less than or equal to) 15 I totally forget how to solve inequalities, please help! Thanks!

**Science**

When a clown anemonefish gives birth, how many babies survive?