Thursday

July 24, 2014

July 24, 2014

Total # Posts: 417

**physics**

A couch with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I still am having troubles with t...

**Physics**

Ok, thats what I got but I wasnt sure if it was correct. Thanks so much!

**Physics**

Someone attaches a 27 kg bale of hay to one end of a rope passing over a frictionless pulley connected to a beam in a hay barn. Someone else pull down on the opposite en of the rope with a force of 397 N. Ignoring the mass of the rope, what will be the magnitude and directionf...

**Physics**

I dont think I did it correctly. I got a very very small number.

**Physics**

A coach with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I think I found the normal force, ...

**english**

this is not unethical. There is no ethical boundary, per se, for advising another co-worker of their work practices. An ethical issue may arise however if I shared that information with that co-worker and I wasn’t supposed to know /share (ie. a supervisor told me in confi...

**english**

Is it ethical telling an associate and close friend that she should pay more attention to her work responsibilities, or management will fire her please explain why?

**Math**

solve log(b4)x-log(b4)2=2 (b4)=base 4

**Pre-Calc**

Solve the equation. (tan^2)3x=3

**trigonometry**

solve: 2cosx-1=0

**maths**

find the area of a square ABCD 16 square meter.find the area of the area joining mid points of the side

**Math**

A bolt weights about 2/5 ounce. True or false The expresion 48 divided by 2/5 could be used to find the number of bolts in a 3 pound box

**Math**

A bolt weights about 2/5 ounce. True or false The expression 48 divided by 2/5 could be used to find the number of bolts in a 3-pound box

**Chemistry**

When determining boiling points, why would you need to repeat your experiment if your sample completely vaporized before you were able to obtain a constant temperature?

**Chemistry**

When determining boiling points, why would you need to repeat your experiment if your sample completely vaporized before you were able to obtain a constant temperature?

**Chemistry**

you were asked to determine the melting point of an unknown compound in order to identify at as one of the compounds you had previously examined. What else could you have done to make sure that your unknown was indeed the compound you believed it to be, and not just a compound...

**Chemistry**

In the determination of melting points, why cant you use water instead of mineral oil?

**Chemistry**

How will the boiling point of a substance be affected by increasing the atmospheric pressure? How will the boiling point of a substance be affected by decreasing the atmospheric pressure?

**Math**

actually i have a question is that 1 big problem or 4 different ones???

**art**

a positive bias

**Statistics**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my standa...

**math**

hi i need help calculating the standard error using the central limit theorem. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11, there are 5x5=25 samples of the two scores (n=2)* i already calculated the standard deviation and mean. for the question my standa...

**statistics**

hi, how would i calculate the standard deviation of the following sampling distribution of means. apparently this is the longhanded way of calculating standard error. *a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 (2, 2) ... 2 (2, 3) ... 2.5 (2, 6) ... 4 (...

**statistics**

what is meant by the standard error of a statistic? what is it an index of? what is meant by the standard error of the mean? what it is an index of?

**statistics**

what is sampling distribution and sampling distribution of means?

**statistics**

what is random sampling and why is it important to statistical inference with reference to representativeness and error?

**Math**

i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a) compute the mean and the standard deviation of the population? ive looked through all my notes and my textbook a...

**statistics**

i have a question regarding statistics. i just don't know how to do it and would really appreciate if someone could tell how i can solve it. the question is; a population of scores contains exactly 5 scores : 2, 3, 6, 8, 11 a) there are 5x5=25 different samples of two scor...

**Chemistry**

If the pH of grapefruit is 3 and the pH of beer is 5, how many times more acidic is the grapefruit juice than the beer? According to the logarithmic scale

**Chemistry 110**

What anhydrous salt has a molecular mass of 258g/mol? I believe the results from my experiment were incorrect and i can not figure out the general formula for the hydrated salt with a molecular mass of 258g/mol. please help

**Chemistry**

What anhydrous salt has a molecular mass of 258g/mol? I believe the results from my experiment were incorrect and i can not figure out the general formula for the hydrated salt with a molecular mass of 258g/mol. please help

**accounting**

The gross pay is $3000 don't know the net pay

**math**

You would dothe commission divided by the percentage of the commission, so 6.48/.054

**accounting**

Earnings at regular rate (40hrs x $40) = $1600 Earnings at overtime rate 20hrs x $40 x 1.75 = 1400 1400+1600 = 3000

**chemistry**

A student performing the water of hydration experiment cant seem to get his hydrate to constant weight. Several times he heats the compound, allows it t cool, and weighs it. But each time he does, he obtains a different mass. can you suggest some possible causes for this dilemma?

**Chemistry**

A commercial for a well known cleaning powder says that it "shakes out white, then turns blue" what type of reaction os occuring? what compound can one use to produce this effect?

**Chemistry**

How is water of hydration related to measurement and how it is related to the law of definite composition?

**Chemistry**

calculate the empirical formula. A chemist heats 50.00g of sulfur under controlled conditions to produce a sulfer-oxygen compund.The mass of the sulfur-oxygen compound is 100.00g. What is the empirical formula of the sulfur-oxygen?

**Chemistry**

If you use a different mass of magensium metal in an experiment would the empirical formula of the compund be the same?

**college**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. Whi...

**crim j**

Should this evidence be excluded? What court case(s) justify your decision?

**crim j**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. Whi...

**Physics**

No..so is it 363+699+363 / 240s + 660s ?

**Phyiscs**

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.80 m/s. During the second part, she rides for 36 minutes at an average speed of 5.20 m...

**physics**

State the law of acceleration in its full form and give examples of how it works

**college**

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 1.3 × 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves f...

**physic**

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 4.5000 kg when weighed in air.

**math**

please help solve this- i cant do it either

**math fractions**

whats 1/8 of $84.00

**child care**

b) because im in middle school now so im kinda of an expert

**Geometry**

B is the midpoint of Symbol for segment A C. . AB=5x+2 AC=12x-2 What is the value of BC? Show your work for credit. Line segment A C with point B on it.

**math**

As a restaurant owner there are many decisions that you need to make on a daily basis, such as where to keep inventory levels. You wish to replenish your stock of dishes by purchasing 250 sets for your restaurant. You have two dish design from which to choose. One design costs...

**chem**

Is the following true or false? The actual size of a measurement multiplied by a conversion factor remains the same, because the measurement being converted is multiplied by 1.

**algebra1**

what formula should i use to solve this quadratic formula? 2x2 + 4x + 2 = 0.

**statistics**

I need help for this question asap thanx

**statistics**

Distance travelled in a week by sales staff employed by nationwide security firm is approximately normally distributed with a mean of 200 miles and standard deviation of 48 miles. Estimate the percentage of staff who in a week travel: 1. a)less than 80 miles b)more than 250 mi...

**Chemistry**

i really dont know why it would be important

**Chemistry**

Why is it important for you to know how to separate solids from liquids?

**calculus**

for x is an element of [-11,11]the function defined by f(x)=x^7(x+3)^6. where does the function achieve its minimum?

**chemistry**

predict the pH of the solution obtained when a 1.0 M magnesium hydroxide solution is titrated with an equal amount of a 1.0 M solution of sodium chloride.

**Spanish**

Mi hermano quieren jugar al futbol.

**Chemistry**

What are some periodic trends among the following elements- carbon, silicon,germanium,tin, and lead?

**Chemistry**

yes but how is it compared

**Chemistry**

When you look up the atomic masses of Si and Sn and then find the average and then look up the atomic mass of Ge, what is discovered? does it lend supporting evidence to the periodicity of elements?

**Chemistry**

I need help describing some periodic trends in the periodic table

**Chemistry**

why do elements within a group have similar chemical properties?

**Chemistry**

What does the study of the periodic table have to do with classification and prediction?

**law of definite composition**

when performing an experiment using potassium chlorate and heating it to form potassium chloride what reasons can you offer for any differences between your results and another lab group in your class?

**chemistry**

why is the law of definite composition important?

**chemistry**

how could you determine whether all the potassium chlorate had been decomposed after heating it using the law of definite composition?

**Physics**

A bat flying in a cave sends out a sound wave to navigate. If the cave temperature is 10.8 C, and the sound the bats sends out takes 0.0679 s to echo back, how far away is the cave wall

**Physics**

If you are standing on the edge of a canyon and yell into the canyon, how long will it take the echo to return to you if the opposite canyon wall is 1060.4 m away and the air temperature is 25.2 C?

**Physics**

What is the fundamental frequency for tube resonating in water if the speed of sound was 343.5 and the tube was 0.274 m out of the water.

**Chemistry**

calculate the number of atoms in 31.5g of cadmium

**US Government**

Thank you Ms. Sue. Goodnight

**US Government**

Why was the separation of powers among the branches important to the founding fathers? Thanks so much! Ash

**US Federal Government**

thank you very much!

**US Federal Government**

How is popular sovereignty present in US Federal government? I know popular sovereignty means the people have the primary source of governmental authority (it also had to do with slaves states and how a state registered their vote as a slave state or not a slave state... HELP!...

**US HISTORY**

which of the 3 branches of the federal US government does the federal reserve and the census bureau fall under?????? please answer! thanx! love, ash

**US HISTORY**

which of the 3 branches of the federal US government does the federal reserve and the census bureau fall under?????? please answer! thanx! love, ash

**US HISTORY**

I am trying to understand the following 3 concepts: Popular Sovereignty Separation of powers (and the 3 branches of gov) Checks and balances (how does a branch have power over another) Thank you for your insight! Ash

**US Government**

I am having a problem understanding what the different roles of the US President are responsibilities: What are"the Head of States" responsibilities? What are "The Chief Executive" responsibilities? What are the "Chief Diplomat" responsibilities? ...

**MATH**

WHAT IS THE SEQUENCE OF 5,7,9,11,13,15...

**Poetry/English**

I am STILL trying to find 3 poetic devices in the poem "The Road Not Taken" by Robert Frost: Please advise if I am on the "right road" or could you put me on "the right path if I am wrong... line 12 "In leaves no step had trodden black"--is i...

**english**

I am trying to find 3 poetic devices in the poem "The Road Not Taken" by Robert Frost. I think "to Where it bent in the undergrowth" is personification I think "Somewhere ages and ages hence" is figurative language and "then took the other, a...

**instrument**

I have absolutely no idea about this, but I am doing a crossword puzzle for music, and I don't know what #1 across is. The clue it gives you is, "music sounds produced by the use of tools," and the word or words is 19 letters long. Help please! Due tomorrow!

**physics**

A train with a velocity of 45.1 m/s must come to an emergency stop in 10.6 s. How far did it travel during this time? i tried to use the x=1/2at^2+vit+xi equation but that did not work..

**physics**

A tailback initially running at a velocity of 6.6 m/s becomes very tired and slows down at a uniform rate of 0.55 m/s2. How fast will he be running after going an additional 6.2 meters?

**physics**

A tailback initially running at a velocity of 6.7 m/s becomes very tired and slows down at a uniform rate of 0.68 m/s2. How fast will he be running after going an additional 6.1 meters?

**physics**

Over a period of 9.0 seconds a plane changes its velocity from 29.5 m/s to 45.7 m/s. What is its uniform acceleration? ---------------- I'm reviewing for my final and i can not think of what the formula to solve this is.

**English**

how do you write great descriptive paragraph

**antonyms**

whats ftthn???

**physics**

A 3.60 kg ball is dropped from the roof of a building 184.8 m high. While the ball is falling to earth, a horizontal wind exerts a constant force of 12.1 N on the ball. How long does it take to hit the ground? (acceleration of gravity = 9.81 m/s^2)

**calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other. How fast is the height of the pile increasing when the pile is 20 feet high?

**calculus**

Air is being pumped into a spherical balloon so that its volume increases at a rate of 80cm^3/s. How fast is the surface area of the balloon increasing when its radius is 7cm?

**chemistry**

Fe

**chemistry**

26 protons and 24 electrons. write the symbol of ions

**calculus**

When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation PV^1,4=C where C is a constant. Suppose that a a certain instant the volume is 520 cubic centimeters and the pressure is 99kPa and is decreasing at a rate of 1...

**calculus**

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 23 knots. How fast (in knots) is the distance between the ships changing at 3 PM?

**math**

fill in the missing signs to make the sum correct...........8 ? 4 ? 4=9

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