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Posts by sammy

Total # Posts: 697

physics
The coefficient of static friction between the 3.0 kg crate and the 31° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down the incline?

Spanish
If I wanted to say "Those butterflies are the prettiest of all." would I say this sentence or should the "esas" be "estas"? Esas mariposas son las más bonitas de todas las mariposas

Physics
Awesome, thanks!

Physics
A force of 15.00 N to the right causes a 2.02 kg book to have a net acceleration of 0.81 m/s2 to the right. What is the frictional force acting on the book?

Physics
A pure copper penny is slid along a steel counter top. If the coefficient of kinetic friction between the copper and the steel is 0.36, what is the magnitude of the penny's acceleration?

Physics
Hi! Sorry the math for the proposed answer is wrong. The equation was manipulated incorrectly and will give a wrong answer

ochem
is cis-1,2-dimethylcyclohexane a conformational isomer of trans-1,2-dimethylcycloehexane? Please explain.

Science
What did Sir Humphry Davy do with the battery he built? I've looked online and haven't been able to find anything. Please help me!!!!

Statistics
9 trucks arrive per hour. It takes 6 minutes after reaching the loading station. Two alternatives to modify the situation. One is to change the trucks and add a helper at the loading station at a cost of 50,0000. This would change the arrival time of the trucks to 6 per hour ...

WRITE THE NUMERAL MATH
3,000,859

MATH
85,700,038

math 11 grade
sequence of 2,5,14,41

math
^the answer is -12, it says so in the back of my book. But once everything is multiples of 1/32, simplify. then the problem should now be 24x-21x=-36 . then subtract that, you get 3x=-36 . -36/3=-12 therefore, your answer is x=-12. Don't forget the negative.

chemistry
A student suspected that an unknown was undergoing a chemical change at its melting point. Suggest a simple method for testing this hypothesis.

English
Also, for the first one-I've reread the paragraph, and now I think it would be two characters-Montrsor is the I and Fortunato is "he" because "you" is not a character,is it? Here is what I meant by number: 3Natural consequence is just something that ...

English
We had to read the opening paragraph of "The Cask of Amontillado" and analyze it with the following questions. I really need help. I understand Montresor is going to seek revenge upon Fortunato. 1.In the first paragraph, how many characters are mentioned? I think 3 2...

chem101
Why is CH3CH2NH2 the least acidic?

chem101
which of the following compounds have polar bonds and a net dipole moment? a) H3COH b) H3CCOCH3 ALSO PLEASE CHECK THIS, RANK THE FOLLOWING FROM MOST TO LEAST ACIDIC COMPOUND: A)H2SO4>H3CCO2H>H20 B)H3CCH2NH2>H3CCH2OH>H3CCO2H

physics
Ttyl8r

math
Add 3 to both sides. Result is 1/2x=6. Now multiply both sides by 2. This gives you 12. This is the final answer.

Math
I have a square cake. The cake is iced on top and all the sides. I need to cut the cake in 6 pieces all pieces getting the same amount of cake and icing. Please help me if possible with a diagram.

math
Use the quadratic formula

Science
Abbreviations you can use for science?

4th grade math
100,000

Social STUDIES
I agree with all of the answer

Trigonometry
Solve: 2 cos[x-ð/8]-sqrt2=0

Trigonometry
If tan theta= 3 and ð<theta< 3ð/2, find cos theta.

biology
if you were decide if an unknown organism is an archaebacterium or aeubacterium you wold look at the ribosomrs brcause

Math (pre-algerbra)
I've tried this sooo many times I have huge marks on my paper and I just can't figure it out: 3a/8-a/12+7/2=7

math
47 divide by 6

speech
why is australia a luck contry

5 grade math
$3,000,000,000,000,000 how much is this in words?

math
which of the numbers are integers? 11/3,9.7,-163,-3/8,1

math
The following scores were recorded on a 100-point examination: 95, 75, 76, 86, 96, 71, 68, 81, 95, 76, 69, 82, 93, 88, 94 Find the mean and median final examination scores.

math
1.)Name the property that is illustrated. a) 7 „e 6 ƒ­ 6 „e 7 b) 7 ƒy (1 ƒy 9) ƒ­ (7 ƒyƒn1) ƒy 9 2.) a) Identify the base in the following statement b) Solve for the amount. What is 81% of 285? 3.)a) Find the supplement of...

Math
Corinne rolls two six-sided number cubes with sides labeled 1-6. What is the probability that she rolls a 6 on both cubes? A. 1/36 B. 1/12 C. 1/6 D. 1/3 I think its A

chemistry
The legal limit for drunkenness is 0.08 ( 0.08 grams of alcohol per 100ml of blood). expired air contains the following main gaseous components by volume: 74.1% N2; 15.0% O2; 6.0% H2O; 0.9% Ar; and 4.0% CO2 at 37 degrees Celcius and 1 atm. Determine the density of ethanol.

Math
Which statement is correct? A. All intergers are rational numbers. B. All irrational numbers are whole numbers. C. A real number must be a rational number. D. A repeating decimal is an irrational number I think it's either A or C.

Math
I have three more questions I do not understand. 1. Two points (-1,1) and (3,-2) are graphed on a coordinate plane. What is the shortest distance between the points? A. 3 B. 4 C. 5 D. 7 I have no idea how to do this. 2. Which expression represents the nth term in the sequence ...

Math
Thanks so much!

Math
The chart shows the number of cars sold per week at a car dealership during the month of June. Salesperson Week 1 Week 2 Week 3 Week 4 Tim 4 8 2 1 Geena 1 2 7 1 Rafael 2 1 5 4 Sonny 4 1 1 10 How should the data be displayed to make the most convincing argument that sales ...

Math
Check my answer please? Yuri is wrapping presents. The first box measures 9 inches by 12 inches by 2 inches. He has a second box with dimensions that are each half of the length of the first box. How does the surface area of the second box compare with the surface are of the ...

Math
Could you please check my answer? Subtract: (6a+2b-5c)-(3a+2c) My answer was: 3a+2b-7c

Math
I'm confused on two questions that are kind of similiar: State the slope and y-intercept of y= -1/2x I know the slope is -1/2 but I don't know the y-intercept State the slope and y-intercept of y= 3x-4 I know the slope is 3, but I don't know if the y-intercept is 4...

Math
Vera wrapped a package that measured 8 in. by 10 in. by 5 in. Find the surface are of the package. I really don't know why I'm having trouble with this problem, but for some reason I just don't know where to start it.

Math
Which measure of central tendency best describes these data? 100, 5, 90, 95, 100 A. the mode only B. the mean and the median C. the mean only D. the median only I've never really understood central tendency

Math
Thank you!!

Math
B. every twenty-fifth name in the town's census directory

Math
Charlotte wants to conduct a survey to find out if the people in her town think that the town should build a new library. Which group of people would be a representative sample to survey? A. parents with children in middle school B. every twenty-fifth name in the town's ...

Math
What is the probability of drawing a heart or a diamond from a standard deck of 52 playing cards? I got 1/2, is this correct?

Math
Okay thanks

Math
What is the probability of rolling a number cube and getting an even number or a multiple of 3? I got 4/6 as the probability, but that isn't a choice. 6 is a multiple of 3 and an even number, so if I count 6 once, then I get 4/6 as the probability. But if I count 6 twice (...

Math
Okay, so the first quartile would be 40, right?

Math
You received scores of 70, 40, 70, 90, and 40. Find the first quartile. I don't even know what a quartile is.

Chemistry
When someone buys fish at the fresh fish market, they should smell the fish to test for freshness, the less “fishy” the smell the fresher the fish. I am supposed to explain the source and chemistry, including reactions, structures, and names of the compounds, behind ...

marketing
to encourage managers to disregard the criterion that a product-market segment should be substantial

3rd grade math
47 by 6

Math
Thanks, I was confused on this problem! And yes, that's what I thought when I read that gas was only $1.22!

Math
The gas tank of a car holds 20 gallons of gas. A gallon of gas costs $1.22. When the tank was filled it cost $20. About what percent of the tank was filled?

Math
Thank you both!!

Math
A molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. What percent of the atoms of a water molecule is oxygen?

Penn Foster
Haha!Glad someone finally got to bottom of this!Happened where I met some people and they said how it was easy to get their degree with getting answers of this site!Made me mad!

geometry
the ratio of the perimeter of two similar squares is 5 to 4. If the area of the smaller square is 32 square units, what is the area of the larger square?

Math
Okay I get it now. Thank you so much!

Math
I have no idea how to do this problem: Select the expression below that is equal to 4(9-m). A. 4m-36 B. 13-m C. 36-m D. 36-4m

Math
Thank you!!

Math
Could you please check my answer? I did this: 10+10=20. 5.49/20=0.2745 per battery 4+4=8 2.98/8=0.3725 per battery The better deal is if you buy the one 10 pack for $5.49 and get one free.

Math
Find the unit price and tell which is the better buy: Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4 packs for $2.98.

Math
Find the unit price and tell which is the better buy: A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You can use a 20-cents-off-coupon if you buy four 20 oz. bottles or a 15-cents-off-coupon if you buy a 64 oz. bottle. Which is the better buy?

math
6060

chemistry help
so is it 900 and 4180 is that the difference???

chemistry help
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...

chemistry help
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...

chemistry
a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...

Algrebra II-please check my answer
Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2....

criminal justice
Name some ethical dilemas that prosecutors have to face

Algebra II-Thank you
Thanks alot-At least I get one concept!

Algebra II-Please clarify one thing for me
Thanks Reiny-I really appreciate it-I get confused about taking the "h" at times So if they say h= (-5), then in the equation when it is written,it is positive and vice-versa, correct?

Algebra II
What is the equation of g(x) if the parent function is f(x) = x^2 and a = 2, h = -5 and k = 7 f(x) = 2(x-5)^2 + 7 F(x) = -3(x+5)^2 + 7 f(x) = 2(x+5)^2 + 7 f(x) = 2(x-5)^2 -7 I think it is 2(x+5)^2 + 7, is that right

Math(Arithmetic)
I need a factor tree is made for 126 .which numbers appear on the bottom rowhelp with

Physics
An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:

Physics
A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:

Physics
what equation do i use to figure that out?

Physics
A constriction in a pipe reduces its diameter from 4.0 cm to 2.0 cm. Where the pipe is wide The fluid velocity is 8.0m/s. Where it is narrow the fluid velocity is:

Physics
Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0m/s and at the narrow end it is 5.0 m/s. The difference is pressure between the two ends is:

science
How many molecules of stearic acid are present in 2.00 mL of a 0.25 mM solution of stearic acid?

Math
Hola

science
In a device like the one shown below, the cylinder is allowed to fall a distance of 300 m. As a result, the temperature of the water increases by 2.7°C. What would have been the increase in temperature if the cylinder were only allowed to fall 100 m?

8th Grade Math
1.183875 I recommend getting a TI-34 Multiview calculator.... Best one yet(:

science
for radio waves with a frequency of 454.4 nm, determine the wavelength, the energy of a photon and the energy of one mole of photns in kj/mol

Math- practical purpose
For many years, China has been the world's most populous country. However, India has been catching up, with 1132 million in mid-2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 0.6% per year. If these rates continue, when will ...

science
13 blocks in all but ends up on the east side

social studies
yes but the summerains were counted as the ones who really settled it

math correct not correct
yay you got it just make sure to show your work " u

6th grade
a right angle is 90 degrees so mla must be acute because acute is less than 90 degrees

spanish
por mucho que means how much what i cant seem to answer biancas question can you answer it or help me try to answer it please

chemistry
a mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the partial pressure of O2 if the total pressure is 1.3 atm?

Physics
A ball is thrown straight upward and returns to the thrower's hand after 3.40 s in the air. A second ball is thrown at an angle of 29.0° with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically?

kwame nkrumah university , ghana
freepassion_sam then we can start even if u have finished

kwame nkrumah university , ghana
give me your addy to help u out

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