# Hint: for part I use G = 6.67 times 10 to the negative 11. for part II, you don’t need to do the full calculation, you can just use your knowledge of how force of gravity depends on mass and

113,480 results

### physics

Hint: for part I use G = 6.67 times 10 to the negative 11. for part II, you don’t need to do the full calculation, you can just use your knowledge of how force of gravity depends on mass and separation distance. Compare the gravitational force on a 49 kg mass at the surface ...

### Integral Calculus

We can use this power series to approximate the constant pi: arctan(x) = (summation from n = 1 to infinity) of ((-1)^n * x^(2n+1))/(2n+1) a) First evaluate arctan(1) without the given series. (I know this is pi/4) b) Use your answer from part (a) and the power series to find a...

### Physics

A 72.0 kg swimmer jumps into the old swimming hole from a tree limb that is 4.00 m above the water. Part A- Use energy conservation to find his speed just as he hits the water if he just holds his nose and drops in. Part B- Use energy conservation to find his speed just as he ...

### physics

A 9.3 kg firework is launched straight up and at its maximum height 45 m it explodes into three parts. Part A (0.5 kg) moves straight down and lands 0.29 seconds after the explosion. Part B (1 kg) moves horizontally to the right and lands 10 meters from Part A. Part C moves to...

### Math

This is the second part of a two part question for an online class. It gave me the degree and the zeros and I had to give the factored form. I got that part right, but I need to know how to get the expanded form from the factored form. I have several more questions like this ...

### Math 116

I have a long problem which I need help with..... Q1) there are two plans available with a total of 56 houses available. x represents plan 1 and y represents plan 2. write an equation illustrating the situation: A1) x+y=56 Q2) there are 3 times as many homes available with the...

### Calc

Let f be the function that contains the point (-1,8) and satisfies the differential equation dy/dx=10/(x^2+1) (a) Write the equation of the tangent to f at x=-1. (b) Use your equation in part a to estimate f(0). (c) We know that the integral from -1 to 0 of 10/(x^2+1) equals ...

### Calculus II

(a) Use differentiation to find power series representation for f(x)=1/(1+x)^2 What is the radius of convergence? (b) Use part (a) to find a power series for f(x)=1/(1+x)^3 (c) Use part (b) to find a power series for f(x)=x^2/(1+x)^3 I found part (a) which was Σ n=0 to &#...

### chemistry

Gas A has a density that is 1.20 times that of gas B. If gas A effuses through an orifice at a rate of 3.41g/L, at what rate will gas B effuse? Hint: Ratio the molecular masses to the densities. Use this information with Graham's law of diffusion. Note that 3.41g/L is a rate...

### Algebra help please

Part A: Divide (16x^5y^4 + 6x^3y - 2x^2y - 24x^2y^4) by -2x^2y. Part B: How would your answer in Part A be affected if the x2 variable in the denominator was just an x? Part C: What is the degree and classification of the polynomial you got in Part A? Is this first part right...

### physics

the space shuttle typically orbits 400 km above the earths surface. The earth has a mass of 5.98 * 10^24 kg and a radius of 6380km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttles cargo bay? B)Use your result ...

### Algebra

This is a 3 part question and it is confusing me quite a bit. Please Help! a) A real estate agent trying to sell you a home in a new developement tells you that two floor plans are available. use x for floor plan 1 and y for floor plan 2. in total there are 56 homes available...

### Social Studies

I'm working on this project where we are assigned a part of africa and have to basically decide everything about it's life there. Right now I'm working on the military part. I have to answer: How strong is the military? Who serves in the military? What kinds of weapons do you ...

### physics

An athlete executing a long jump leaves the ground at a 28.0 angle and lands 7.60m away. part a)What was the takeoff speed? part b) If this speed were increased by just 8.0 % , how much longer would the jump be? i got for part a)9.48 m/s but i need help with part b

### physics. HELP PLEASE !

An athlete executing a long jump leaves the ground at a 28.0 angle and lands 7.60m away. part a)What was the takeoff speed? part b) If this speed were increased by just 8.0 % , how much longer would the jump be? i got for part a)9.48 m/s but i need help with part b

### Quantiative Methods

Western Family Steakhouse offers a variety of low-cost meals and quick service. Other than management, the steakhouse operates with two full-time employees who work 8 hours per day. The rest of the employees are part-time employees who are scheduled for 4 hours shifts during ...

### math

divide 95m long string such that twice of 1st part, 4 times of 2nd part and 5 times of 3rd part are equals

### Math

Dominic earns $18 an hour plus $25 an hour for every hour of overtime. Overtime hours are any hours more than 35 hours for the week. Part A: Create an equation that shows the amount of money earned, E, for working x hours in a week when there is no overtime. (3 points) Part B...

### History

Hi I need some help with my history homework I have answer all of the question I just need help with a few about the Sumerian civilization. I just want to get some idea so that I can research these topics better. 1.Type of Governmen- I just some general info here 2.Economic ...

### algebra

Part A: Graph the system of linear equations. Part B: Use the graph created in Part A to determine the solution to the system. Part C: Algebraically verify the solution from a Part B x + 6y = 6 y = 1/3x - 2

### physics

we just did an practical on newton's second law and we just have to do a report on it.... basically there are two parts to it, first part is when the overall mass of the system remains constant and the second part is when the force remains constant. there are two parts which i...

### math

Nakim simplified 3 times the square root of 2x plus x times the square root of 8x minus 5 times the square root of 18x and got -10x times the square root of 2x for an answer. Part 1: Using complete sentences, explain what Nakim did wrong. Part 2: Show all your work to simplify...

### Chemistry

Part A: Unknown Acid use 1gram and mix with 120 mL of distilled water Determine the concentration of the acid by titrating with 0.0998 M of NaOH Concentration of NaOH= 0.0998M Volume of NaOH= 3.5 mL # moles of NaOH= Initial Concentration of Weak Acid- Show Calculation of Ka ...

### Physics

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

### Physics

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

### Physics

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

### Chemistry

I have a question about buffers. Part A So it starts with 20ml 0.1 sodium acetate and 25ml 0.1 acetic acid. Calculate ph of buffer is 4.74 because the acid and conjugate base have the same molarity correct? So the Ph is just pKa (1.8e-5)? Part B So the next part is add 5ml of ...

### math

f(x) = -16x2 + 24x + 16 Part A: What are the x-intercepts of the graph of f(x)? Show your work. (2 points) Part B: Is the vertex of the graph of f(x) going to be a maximum or minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points) ...

### English

Thank you very much. I just have a few doubts about an email I need to write. Students will be able to.. 1) use recordings to monitor grammatical errors in spoken English 2) Prof. ... has completed part D in Italian (points 2-6). I translated them into English and I'm ...

### math 8

a store has a total of 108 full-times staff.there are three times as many full-time staff as part times staff. How many staff are in each category?

### physics

A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply a force FA, as part a of the drawing shows. By itself, however, force FA is insufficient. Therefore, two additional forces FB and FC are applied, as in part b of the drawing. Each of ...

### Math

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 3x + 10 y is less than negative 3 over 4 times x minus 1 Part A: Describe the graph of the system, including shading and the types of lines graphed...

### Calc 2

Question 2 Let an = Hn - ln(n), where Hn is the nth harmonic number Hn = 1 + 1/2 + .... + 1/n a. Show that an > 0 for n>= 1 (Hint: show Hn >= integral from 1 to n+1 dx/x) b. Show {an} is decreasing by interpreting an - an+1 as a positive area. (Hint: use the previous ...

### Physics

A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply a force FA, as part a of the drawing shows. By itself, however, force FA is insufficient. Therefore, two additional forces FB and FC are applied, as in part b of the drawing. Each of ...

### Quadratic Equations and Functions

I started having trouble on part (c), and I need to know this before I can go onto the other problems. Plz help! The parabola shown at the right (no picture, sorry) is of the form y=x^2+bx+c. The graph's y-intercept is (0,2), the axis of symmetry is -2.5 and the two points ...

### CALC 2

Let an = Hn - ln(n), where Hn is the nth harmonic number Hn = 1 + 1/2 + .... + 1/n a. Show that an > 0 for n>= 1 (Hint: show Hn >= integral from 1 to n+1 dx/x) b. Show {an} is decreasing by interpreting an - an+1 as a positive area. (Hint: use the previous part) c. ...

### Check Please(Math)

(-2x^2y)^3*(5xy^3)^2=(-2x^2y)^3 = -8 x^6 y^3 *Please check my work. What did you do with the (5xy^3)^2 part. The first part you did ok. But you can't just throw away part of the equation. I don't get that part.What do I do there.? (5xy^3)^2=25x^2y^6 You did the first part ok ...

### The Curriculum

What is the best strategy to use when a teacher is providing for learning of physical knowledge as a part of science? A. Give detailed information by telling children about physical knowledge. B. Have someone demonstrate an experiment and debrief. C. Set up the materials and ...

### Algebra/College/HELP

(I know that the questions I answered are right but I'm stuck on c and d. Can someone please help me? I'm not very good at algebra). a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x...

### Chemistry

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

### Chemistry

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

### algebra

1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan ...

### HCS/451

What criteria should Healthcare organizations use to prioritize regulartory requirements. I just need to find information on this part of the DQ.

### physics

You reach out a second-story window that is 17 m above the sidewalk and throw a 2-kg ball straing upward with 17 J of kinetic energy. Use g = 10m/s^2 Part A) What is the ball's gravitational potential energy when it is released? Use a height measured from the sidewalk. PE1 = ...

### Algebra

1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use ...

### Algebra

Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a)The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x to...

### Chemistry-Repost for DrBob222

A sample of C60O3 decomposes with an activation energy of 50 kg/mol, an Arrehnius pre-factor of 2e10 s-1 and a k value of .04 s-1. How long does it take for a 25 mg sample at 25 degrees C to produce 10 mg. Your response was is that C60O<suh>3 or what? And I thought ...

### Algebra I

Rectangle ABCD has vertices C and d on the x-axis and vertices A and B on part of the parabola y = 9 - x^2 that is above the x-axis. a.) Find the coordinates of A, B, C, and D in terms of x. b.) Determine the Area of the rectangle as a function of x. c.) What is the domain for...

### English

In Fahrenheit 451, what pages are these words found on? I really need help just with this. It would be nice to help me out. Here are the words. Part 1: Abruptly, intact Part 2: certitude, darkling, dispersing, linguists, moor, televisors Part 3: scuttling

### Business

If you had to use a body part to represent that someone is independent. Which body part would you use and why?

### Algebra

(I am not sure how to get the y value for part C and the whole part D) (I answered a couple of them but am not confident on my answers, so can you please tell me if my answers are not correct to the ones I answered and for the ones I haven not answered that is because I do not...

### Math checking answers (Calculus Differentials)

The radius of a spherical balloon is measured as 8 inches, with a possible error of 0.02inch. a) Use differentials to approximate the possible propagated error in computing the volume of the sphere. b) Use differentials to approximate the possible propagated error in computing...

### College Algebra

(I am not sure how to get the y value for part C and the whole part D) (I answered a couple of them but am not confident on my answers, so can you please tell me if my answers are not correct to the ones I answered and for the ones I haven not answered that is because I do not...

### chemistry

For 6.0*10^-2 M H2CO3, a weak diprotic acid, calculate the following values. Use ionization constants of H2CO3: Ka1=4.4*10^-7, Ka2=4.7*10^-11, as necessary. PART A: [H3O^+] M PART B: [HCO3^-] M PART C: [CO3^2-] M

### Quadratic Equations and Functions

I started having trouble on part (c), and I need to know this before I can go onto the other problems. Plz help! The parabola shown at the right (no picture, sorry) is of the form y=x^2+bx+c. The graph's y-intercept is (0,2), the axis of symmetry is -2.5 and the two points ...

### math

a store has a total of 108 full-time staff and part time staff. There are three times as many full-time staff as part time staff. How many of the staff are in each category?

### P5 Science

My full question. A leaf was plucked from the garden. The procedure for testing for starch in the leaf was carried out. Part of the leaf turned blue-black and part of the leaf just turned brown. Question : Why do you think the other part of the leaf did not contain starch?

### ACC305 Accounting for Decision Making

Describe the complications that arise when LIFO or average cost is used with a perpetual inventory system. Use specific examples and references. The part that I am having trouble with is finding examples. I have the rest of the work done now I just need help with getting some ...

### Math

A 5cm piece of wire is cut into two parts such that a square formed by bending on part will have four times the area of a square formed by bending the other part, what is the length of the longer part. I just don't know what the equation would look like.

### Geometry / Algebra 1

(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that solved into y=ax*2+bx+c ...

### Trigonometry

Hi, I need help with this question: Use the addition and subtraction formulas ti fubd the exact values of the trigonometric ratios: cos(-7pi/12) Okay, I'm just having trouble with a rather basic part of the question... I wrote cos(pi/4 + pi/3), but now I realized that the trig...

### English

Except for the first question the others refer to an evaluation grid I need to translate into English. I really hope you can have a look at it. 1) What would you become if you were older? What will you do when you are grown up? 2) Essential (basic?) knowledge of the subjects. ...

### Quantitative, stastics and business

A company has three machines A, B and C which all produce the same two parts, X and Y. of all the parts produced, machine A produces 60%, machine B produces 30%, and machine C produces the rest. 40% of the parts made by machine A are part X, 50% of the parts made by machine B ...

### Math

I need help on this problem: 8+9-10 I just don't understand if you do that 8+9 part first or the 9-10 part first Can you just tell me the steps to it? Thanks! -MC

### Algebra

I keep confusing myself when I look at this word problem. I am not sure if I am setting it up correctly. Any advice would be appreciated. It has several parts to it. 1. Suppose you are in the market for a new home and are interested in a new housing community under ...

### algebra

(I answered a couple of them but am not confident on my answers, so can you please tell me if my answers are not correct to the ones I answered and for the ones I haven not answered that is because I do not know how to do them. PLEASE HELP!!! This assignment is already late). ...

### Chemistry - v/v versus w/w

Thanks a lot:) So just to confirm: normally for any chemical bought from manufacturer, if it is not stated, the % usually means v/v? Seems like for conc sulphuric acid, when it is stated 97% sulphuric acid, it means 97% w/w sulphuric acid? Thank you very much. Posted by annie ...

### Chemistry

(a) Calculate the lattice constant a in palladium (Pd). Use only the information available in the class Periodic Table, and express your answer in angstroms. (b) Calculate the distance (in angstroms) between adjacent (110) planes in palladium (Pd). Hint: use your work from ...

### calculus 1 (I need help)

The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show all steps. (Hint: use ...

### @damon

I am still getting the wrong answrs, can you please do me a favor and for each part list the formulas and steps i need to do in order to get the answer. thank you At serve, a tennis player aims to hit the ball horizontally. part a)What minimum speed is required for the ball to...

### Portions and integers

I need help please. Mercury is a metal that is liquid at room temperature. Its melting point of -39 degrees Celsius. The melting point of isopropyl alcohol is -89 Celsius. (Part A) In the context of this problem, what does zero mean ? (I think it just tells if the liquid will ...

### business

which statement presents a negative element in a positive way? the part cant be replaced at no charge only if your unit is less two years old. if your unit is too old,you will have to pay 49$ for a replacement part. we cannot replace the part for free on those older units. You...

### ALGEBRA HELP #3

The graph shows the functions f(x), p(x), and g(x): Graph of function g of x is y is equal to 1 plus the quantity 1.5 raised to the power of x. The straight line f of x joins ordered pairs negative 5, 3 and negative 3, negative 1 and is extended on both sides. The straight ...

### ochem

Calculate the amount (volume) of 5.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 100 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

### chemistry

Calculate the amount (volume) of 5.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 100mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

### chemistry

Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation

### Chemistry

Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

### Pre Algebra

Solving part of a part. How do you use thermometers to solve fraction problems?

### Chem 12

Okay, this is a two-part question and the unit is acids and bases. Ka for NH4 is 5.6 x 10^ -10 Kb for NH3 is 1.8 x 10^ -5 1. Determine the pH of a solution prepared by adding 0.0500 mole of solid ammonium chloride to 100mL of a 0.150 molar solution of ammonia. 2. If 0.0800 ...

### Alegebra, math 116

1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use ...

### Operations Management

Suppose the company has revised its plans for the processes described in part “a” to accommodate technological process changes. Determine the placement of departments that will now minimize total travel cost. Use the distances shown in part “a”, but use the following ...

### Maths

There are 3.33 litres of part A and 6.67 litres of part B. When they are completely mixed together, they make 10 litres of paint. How much of part B would you need if you are only using one litre of part A

### science

Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation. Any help is appreciatede.

### math

(a) You have of an hour to take a three-parts exam. You use of an hour for the first part and of an hour for the second part. How much time do you have left to finish the last part of the test?

### Algebra 1 urgent

(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that solved into y=ax*2+bx+c ...

### physics

A parallel-plate capacitor is formed from two 1.0{\rm cm} \times 1.0{\rm cm} electrodes spaced 2.8{\rm mm} apart. The electric field strength inside the capacitor is 1.0\times10^{6}{N/C}} part a What is the charge (in {\rm nC}) on positive electrode? part b What is the charge...

### math

Hi This is a three-part question: a. the graph y = f(x) in the xy-plane has parametrization x=x, y=f(x), and vector formula r(x) = xi + f(x)j. Use this to show that if f is twice-differentiable, then ((absvalue f''(x))/[1+((f'(x))^2]^3/2 b. use the formula for k in part a to ...

### Physics: Work

1st question: I was solving a question and I was asked the work done by friction. It is natural that work done by friction (a retarding force)should be negative and in my answer it was. However, just to be sure, work can be negative? 2nd question: A block of m = 2.00kg is ...

### chem

Suppose you need to extract an organic substance S from water into ether, where the distribution constant Kdist = [S]org/[S]aq is at first unknown. a) By testing the solubility of the material in each solvent under saturating conditions at room temperature, you find that it ...

### Physics

A baby elephant is stuck in a mud hole. To help pull it out,game keepers use a rope to apply force FA, as part(a) of the drawing shows. By itself, however, forceFA is insufficient. Therefore, two additionalforces FB and FC are applied, as in part (b)of the drawing. Each of ...

### math

marian has 2/3of a bag af bagles. A) she adds another 1/4 bag of bagels. what fraction of the bag is full with bagels now? B)Marian has another bag of bagelsthat is 5/6 full. what fraction describes how many more bagels are in the bag in part (A)? To add 2/3 and 1/4 you need ...

### Chemistry

Part 1: Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ? 0.155gx46.0 = moles moles x 6.02 E23 = answer Part 1 Answer: 2030000000000000000000 Part 2: How many atoms of N do you...

### Math 116

Okay so now I am working on the substitiution portion of this assignment and I understand the first part by not the second can someone help? Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) ...

### Organic Chemistry 51B

calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

### Physics

I just need to know how to start this equation because it makes no sense The position of a particle is given by r = (6.0 cos 3.0 t i + 6.0 sin 3.0 t j) meters. Determine (a) the velocity vector, v, and (b) the acceleartion vector, a. (c) What is the parth of this particle? [...

### math: repost with corrections

p. 942 #5 This is a three-part question: a. the graph y = f(x) in the xy-plane has parametrization x=x, y=f(x), and vector formula r(x) = xi + f(x)j. Use this to show that if f is twice-differentiable, then k(x) = ((absvalue f''(x))/[1+((f'(x))^2]^3/2 b. use the formula for k ...

### Math

Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan one and...

### algebra

1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan ...

### physics

A projectile of mass m moves to the right with a speed vi. The projectile strikes and sticks to the end of a stationary rod of mass M, of length d, that is pivoted about a frictionless axle through its center. (a) Find the angular speed of the system right after the collision...