# Posts by Robert

Total # Posts: 991

**Physics - Rotational Motion**

(#1.) A top starting from 40 rad/s takes 200 rad to stop. What is its rotational acceleration? (a constant) (#2.) A stationary 100 Kg circular object (r= 0.20 m) is on a 35 degree incline. The coefficient of rolling friction between the block and the incline is 0.01. If it ...

**Physics - Rotational Motion**

(#1.) A top starting from 40 rad/s takes 200 rad to stop. What is its rotational acceleration? (a constant) (#2.) A stationary 100 Kg circular object (r= 0.20 m) is on a 35 degree incline. The coefficient of rolling friction between the block and the incline is 0.01. If it ...

**AP US History**

Benjamin Wade

**Math**

how could you use 5 x 6 = 30 to find the product of 6 x 6

**AP Chemistry**

all three?

**AP Chemistry**

Consider a 50.4 g sample of H2O(g) at 115°C. What phase or phases are present when 156 kJ of energy is removed from this sample? Specific heat capacities: ice, 2.1 J/g·°C; liquid, 4.2 J/g·°C; steam, 2.0 J/g·°C, ÄHvap = 40.7 kJ/mol, &...

**Chemistry**

Hi everyone, I'm having problems with effective nuclear charge. Regarding these problems. Calculate Zeff for a valence electron in an oxygen atom. and Calculate Zeff for the 4s electron in a copper atom, . and Calculate Zeff for a 3d electron in a copper atom, Cu. Like for...

**urgent Help .. Chemistry**

If you assume that an atom is a hard sphere, you can estimate the average volume of space it occupies using basic geometry. Estimate the volume,V , of one sodium atom (Na) using its metallic radius of 186 pm . Express your answer in cubic picometers.

**chemistry**

reaction between CuSo4+NaCl

**physics**

A 2 gram bullet traveling at 1500 m/s [East] hits a 200 g block of wood at rest, and becomes embedded in it. If the block is suspended by long ropes, how high will it travel before it comes to rest?

**social studies**

What was the type of ship that Hernando Cortes sailed? Thank you.

**College Physics**

Yeah this is from a physics lab. It was for a "Energy Works" lab where we trying to proof conservation of energy. Total energy = KE + Ug. We had a 2.2m long Dynamics Track with Dynamics cart. We used a "riser block" which was a wooden block to raise the ...

**College Physics**

Let's say you measure an average acceleration to be 0.3883 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs. cm Use three ...

**7th grade science**

....... capacity is the largest numbers of individuals of one species that an ecosystem can support over time. What kind of capacity???

**Science**

The maximum rate of increase for a population is its......... potential.

**Chemistry (Orbital help needed)**

I just want to make sure I'm doing this right... (Numbers in brackets are the square roots or electrons) "How many orbitals are completely filled in an atom that has 12 electrons? The electron configuration is 1s[2]2s[2]2p[6]3s[2]?" It would be 2 right? I'm ...

**Project Management**

How does the design phase of the project management life cycle differ in content and importance from the other phases?

**government**

durrrr..

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?

**math**

A science workbook is 0.75 inches thick. How many workbooks will fit on a 2-foot shelf? what is the equation? estimation?

**Project Management**

List the personal and professional characteristics necessary to be an effective project manager. What characteristics are learnable?

**chemistry**

yes that solved everything thanks!

**chemistry**

Ibuprofen, the active ingredient in Advil, is made up of carbon, hydrogen, and oxygen atoms. When a sample of ibuprofen, weighing 5.000 g, burns in oxygen, 13.86g of CO2 and 3.926 g of water are obtained. What is the simplest formula of ibuprofen? I need to find out if I'm...

**ALGEBRA**

can you help me with this. d don't get it at all :( let n be the number used for the given number puzzle. use algebra to show how the puzzle works. 1. pick a number 2. subtract 9 3. multiply by 6 4. divide by 3 5. add 18 6. subtract twice your original number You will ...

**Chemistry**

Imagine that you have a 6.00L gas tank and a 4.00L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145atm , to what pressure should you fill the...

**Physics**

Oh okay thank you very much.

**Physics**

Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net force ...

**accounting**

i HAVE A BALANCE SHEET FOR A COMPANY AND i WOULD LIKE FOR SOMEONE TO TELL ME IN LAYMAN TERMS WHAT IT SAYS

**computers**

Why do you think the requirements analysis process is so difficult?

**Critical Thinking**

I could not identify vague, ambiguous, or rhetorical devices in this article. Can you tell me if I am missing something? John Kerry is making the outsourcing of jobs by American companies a centerpiece of his campaign, telling audiences that ''because of George Bush&#...

**Biology**

The following chemicals have the indicated formula weight Surcose = 342.3g; Potassium dihydrogen=136.09; and Tris=121.14 Also the following solution already made: 20%SDS, 5M NaCl, 500mM EDTA. You have a 40% glycerol solution, and 10X TBE. List the step to make the following ...

**Physics**

Given the initial position of a particle is x(0)=2m at t(0)=0s. At t=2s, what are the particle's (a) position, (b) velocity and (c)acceleration?

**Grammar questions check**

Identify the locations or locations where apostrophe errors occur: (A) When the dog knocked over it's (B) bowl, the little girl claimed that the dog wasn't (C) her's

**calculus**

what is the integral of x^(2)arctan(6x) dx?

**math**

a ______________ is a mathematical rule.

**math**

what is a mathematical rule?

**novel**

1)B 2)C 3)C 4)D 5)D 6)C 7)B 8)B 9)C 10)B 11)A 12)C 13)A 14)B 15)D 16)C 17)A 18)D 19)A 20)D

**Chemistry -- to Dr.Bob**

whom should i link up with to meet the challenge of spending the next two hours blowing up rubber balloons by mouth besides old huff and puff luc,eh what?I`m woefully loneley for Mr.Adams.Thanks

**English**

Summarize Paris' request of Capulet, and Capulet's response?

**math**

which allows you to convert pounds and tons to ounces?

**creating surveys**

how to create a survey

**Accounting**

Identifying and journalizing Closing Entries Klein Photography

**non fiction**

An enjoyment of solitude

**Math (Geometry)**

I only describe one because that is the one I am having trouble with, the others were simple since it would show a figure composed of 5 triangles and only 2 would be shaded. (2/5)

**Math (Geometry)**

"Target Games: Darts are thrown at each of the boards shown below. A dart hits the board at a random point. Judging by appearances, find the probability that it will land in the shaded region." This figure is a diamond (the diamond is not shaded) and it has half a ...

**history**

which sides slave on during the Civil war? and why did they switch side?

**history**

why most American slaves don't have birth record?

**math**

Discuss the relationship between the graphs of the lines with equation y = mx +2, where m is any real number.

**Math (Geometry)**

Yeah it left me clueless too, oh well, I will just have to hope I get them right. XD

**Math (Geometry)**

See that's exactly what I thought, the 22% one was #1 but when I checked it in the back of the book it said it should be 25. Could the book be wrong? (It also says #3 should be 32)

**Math (Geometry)**

"The graph shows types of trash in a typical American city. Find the measure of each central angle to the nearest whole number." (I do not want all the answers, I just want to know HOW to get them so I will only post the first three problems that corresponds with the...

**Spelling**

Hello Can Anyone help me spell the word ( ACK-ROW-NIM ) For Instance DOB Is An ACK ROW NIM For Date Of Birth. THANK YOU in Advance Robert

**chemistry**

A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?

**Physics**

A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes make a 30.0 ...

**history**

what is The trans-Atlantic slave trade and its most lasting consequence.

**math**

A figure is transformed into a new figure by being rotated 180 degrees, translated left 6 units, and dilated by a factor of 4. How are the old and new figures related? a)both congruent and similar b)congruent but not similar c)similar but not congruent d)neither similar and ...

**math**

Factor (15a squared bc squared -9a squared b to the fourth c) by finding the gcf. I think the answer is 3abc(5ac-3ab3). I got it because I found the gcf of the coefficents which are 3. I subtracted one from each exponent so, i canceled b from 15a squared bc squared and c from-...

**math**

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false? a)alternative interior angles are always congruent. b)corresponding angles are always congruent. c)adjacent interior angles are always supplementary d)exterior ...

**math**

line xy is translated 3 units to the left. if a point on line xy is located at (2,11), where would the equivalent point be on line X and Y prime? a)(2,14) b)(2,8) c)(-1,11) d)(5,11) I think the answer is c. What I did is move the point 3 units to the left and and subtracted 3 ...

**math**

so the answer is c?

**math**

Patrick has a summer job passing out flyers for a store. Each flyer weighs about 0.55 ounce. If he is given a bundle of flyers that weighs 16.5 lbs, how many flyers must he pass out? a)105 b)300 c)480 d)560 I think the answer is b. Is it right?

**math**

how many fluid ounces are there in 2 gallons of milk? a)256 b)128 c)64 d)8 I think the answer is a. Is it right?

**math**

line xy is translated 3 units to the left. if a point on line xy is located at (2,11), where would the equivalent point be on line X and Y prime? a)(2,14) b)(2,8) c)(-1,11) d)(5,11) I'm not sure but i think the answer is b or c. am i right?

**math**

A transversal intersects two parallel lines and forms eight angles. Which of the following statements is false? a)alternative interior angles are always congruent. b)corresponding angles are always congruent. c)adjacent interior angles are always supplementary d)exterior ...

**math**

factor (15a squared bc squared -9a squared b to the fourth c) by finding the gcf I think the answer is either 3abc(5ac - 3a cubed) or 3a squared bc(5c - 3b cubed) Am i on the right track?

**math**

is the answer d?

**math**

what is the gcf of 8x squared y, 12x to the fourth y to the fourth, and 20x cubed? a)8x squared y b)4x squared y c)8x squared d)4x squared I don't have an answer. The gcf is 4. I think the answer is either b and d. Which one is it?

**math**

A figure is transformed into a new figure by being rotated 180 degrees, translated left 6 units, and dilated by a factor of 4. How are the old and new figures related? a)both congruent and similar b)congruent but not similar c)similar but not congruent d)neither similar and ...

**math**

A crated full of sugar cubes has a volume of 3 cubic ft. The volume of each sugar cube is 0.5 cubic inch. How many cubes are in the crate? a)432 b)1728 c)5184 d)10368 I need help with this question.

**math**

Simplify the expression (x to the fourth power times x cubed)squared/x to the 4. a)x b)x to the fifth c)x to the tenth d)x to the 20 I kind of confused. I tried to divide by 4, but i couldn't get anything. I need help?

**math**

Which is equivalent to the expression (a squared + a to the fourth power) to the 0 power? a)0 b)1 c)a to the 6 power d)a to the eigth power I got answer a by adding 2 and 4 and multiplying it by 0. Is this right?

**math**

Boris gets paid an 8% commission on every car he sells. Last week, he made a commission of $1240. What was the price of the car he sold? a)15500 b)15000 c)12500 d)1550 I got answer a by dividing 1240 by .08. Is this right?

**math**

there is 51 students in the gym class and they are picking captains and there is one left and the teams have to be even so where does the last one go

**chemistry**

how to know clarify if the subtance is polar or nonpolar?

**Linguistics**

Hi I am looking for examples of voiceless/voiced words for the following places and manner of articulation: bilabial / nasal; alveolar/lateral; velar/stop plosive; velar/nasal; alveolar/stop plosive; post-alveolar/gliding; dental/friction; labiodental/friction; alveolar/nasal...

**math**

Solve this : (8x^3 ) - (168x^2) + ( 864x) = 1120 please >>>>>>>>>> I need it >>> please

**math**

finding the area of a submaine if it is 4.5m * 2.3m

**math**

How do you find the area of something?

**science I REALLY NEED HELP**

Say a submaine has an area of 4.5m X 2.3m and it is 304.8m below sea level. And that the density of the seawater is 113.4 kg/m2 what is the pressure exerted on the submaine by the water above it?

**math**

Are the possible values 5 and 6?

**math**

Susie designed an excersise program for herself. One part of the program requires her to walk between 25 to 30 miles each week. She plans to walk the same distance each day five days a week. What is the range of miles that she should walk each day? Write and solve a compound ...

**math**

Is h>-1?

**math**

1>2h+3>-1 1>2h+3 2h>2 h>1 2h+3>-1 2h>-4 h>-2 Is this right?

**math**

9250 </= x </= 10750 is the answer?

**math**

the crowd that heard the president speak was estimated to eb 10000 people. the acyual crowd could be 750 people more or less than this. What are the possible values for the actual crowd size? Write and solve a compund inequality that rpresent it and graph the solution. I think...

**math**

is the second queston right?

**math**

no one is answering.

**math**

Solve the compund inequality and graph the solution. -4<t+2<4 First I did t+2>-4 and I got t>-2 and I did t+2<4 and i got t<2. Then I graphed it and I dot an open dot on 2 and -2. Is this right? -1<1/2x<1 I did 1/2x>-1 and i got x>-2 and i did 1/...

**math**

is the second question right?

**math**

-6<9+3y<6 9+3y>-6 y>-5 9+3y<6 y<-1 On a number line, dot -1 and -5. Is this right? 3f>15 or 2f<-4 15>3f f>5 2f<-4 F<-2 Is this right?

**math**

Solve the compund inequality and graph the solution. -4<t+2<4 First I did t+2>-4 and I got t>-2 and I did t+2<4 and i got t<2. Then I graphed it and I dot an open dot on 2 and -2. Is this right? -1<1/2x<1 I did 1/2x>-1 and i got x>-2 and i did 1/...

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees This is my answer? Is this right?

**math**

I think that's the answer. Is this right?

**math**

I really need an answer!Why are no one answering?

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees? I really need an answer!!!!!!!

**math**

no one's answering.

**math**

when you're rotating a trapezoid that's in quadrant 4 90 degrees, does the trapezoid goes in quadrant 2 and the coordiantes switch? also, does the trapezoid goes in quadrant 1 when rotating 180 degrees?

**math**

so which one is the radical form?

**math**

for the first question, can the answer be 9 and 7?