# Dom

Most popular questions and responses by Dom
1. ## Math (Physics)

Problem: An excited hydrogen atom could, in principle, have a radius of 2.50 mm . ________ Part A: What would be the value of n for a Bohr orbit of this size? Answer--> n= 6.87×103 _______ Part B What would its energy be? Answer--> E=_______eV [Note: I

2. ## Chemistry

OOPs i Meant How many grams CaCo3will dissolve on 3.0*10^2mL of 0.050 M Ca(NO3)2? Ksp=8.7*10^-9

3. ## Physics

Two metal spheres having charges of +4.0 x 10^-6 coulomb and +2.0 x 10^-5 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each sphere is...

4. ## Physics

An air-filled toroidal solenoid has a mean radius of 15.2 cm and a cross-sectional area of 4.98 cm2 as shown in (Figure 1) . Picture this as the toroidal core around which the windings are wrapped to form the toroidal solenoid. The current flowing through

5. ## Pre calc

If 250 mg of a radioactive element decays to 200 mg in 48 hours, find the half-life of the element

7. ## Urgent! Pre-Cal

A wheelchair ramp with a length of 122 inches(top of ramp) and has a horizontal distance of 120 inches(bottom of ramp): a) what is the ramp's vertical distance(x)? b)Construction laws are very specific when it comes to ramps. Each vertical rise of 1 inch

8. ## Math

Apex Plumbing charges a trip fee of \$55 plus \$15 for each quarter hour of service. John wrote an equation using, t , the total cost of a service call, as a function of, h , the number of hours the call lasted. What is the value of the slope in his equation

9. ## Chemistry

How many grams will dissolve on 3.0*10^2mL of 0.050 M Ca(NO3)2? Ksp=8.7*10^-9

10. ## Emily dickson

Three fact about her poet "The sky is low,the clouds are mean"

11. ## Physics

A 20-cm-diameter circular loop of wire is placed in a 0.57-T magnetic field. Part A When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? Part B The plane of the loop is rotated until it makes a 42 ∘

A sledge loaded with bricks has a total mass of 18.0 kg nd is plled at constant speed of a rope incllined at 20 degres above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. the coefficient of kinetic friction between the

13. ## Math

If the electric field in an EM wave in free space has a peak magnitude of 8.7×10−5V/m, what is the peak magnitude of the magnetic field strength? Answer:____T

14. ## Pre-Cal

Solve the equation for the indicated variable: (ax+b)/(cx+d)=6 , Solve for X

15. ## Statistics

I you are told that a data set has a mean of 25 and a variance of 0 you can conclude that A)There is only one observation in the data set B) There are no observations in the data set C)All of the observation in the data set are 25 D)Someone has made a

16. ## math

what is the word form for 0.34

17. ## Physics

A metal sphere has a net negative charge of 11 x 10^-6 coulomb. Approximately how many more electrons than protons are on the sphere?

18. ## Math

Problem: What is the resistance of a 3.9-m length of copper wire 1.1 mm in diameter? The resistivity of copper is 1.68×10^−8Ω⋅m. Answer--> R=______Ω

19. ## Math (Physics)

A galaxy is moving away from Earth. The "blue" hydrogen line at 434 nm emitted from the galaxy is measured on Earth to be 458 nm . Part A How fast is the galaxy moving? Answer--> v=____ c Part B How far is it from Earth based on Hubble's law? Answer-->

20. ## Sociology

1). Welfare Reform is said by politicians to be based on the idea that the federal government wanted to get out of the “helping people” business. True or false 2). Generally speaking, the best predictor of where a person will go in life and what their

21. ## chemistry

The decomposition of an aldehyde solution in carbon tetrachloride is a first order reaction with a rate constant of 1.20 x 10-3 min-l. If we start with [aldehyde] = 0.0500 molar, what will the concentration be 150 minutes later? a. 0.00900 M b. 0.0418 M c.

22. ## written communication

Discuss how you would approach creating a negative message for a superior This has been addressed on Yahoo: http://answers.yahoo.com/question/index?qid=20060830050606AACEvV3 When you come up with your attempt to answer this, please re-post, and someone

23. ## Physics

The bird perched on the swing has a mass of 48.0 g, and the base of the swing has a mass of 159 g. The swing and bird are originally at rest, and then the bird takes off horizontally at 1.20 m/s. How high will the base of the swing rise above its original

24. ## Computer Programming

I'm trying to create a vba code that solves this problem: 50 apartment units rent for 600 a month, for each 40 dollar increase in rent a unit becomes unoccupied. I want to find the max profit and number of units at that number. Sub Rent() Dim Rent As

25. ## chemistry

How many moles of vanadium atoms, V, are needed to combine with 0.725 mol of O atoms to make vanadium pentoxide,V2O5?

26. ## Government

Which situation would not happen in a parliamentary form of government? A. The executive consults with the legislature about whether to declare war on a neighboring nation. B. The government dissolves when the ruling party cannot effect change on a major

27. ## Sociology

1). A major source of increasing economic inequality in the U.S. is the fact that: A) the U.S. is a racist society B) the overwhelming majority of new jobs have been in the lowest paying sectors C) Social Security payments are unable to keep up with

28. ## Vba

I'm trying to write a sub that asks how much oil I made, and then gives me number of barrels needed to hold oil, cost of producing oil, and profit from oil. This is what I have so far, I'm not sure what to do. Sub Oil() Dim barrels As Variant Dim tons As

29. ## Physics

Problem: A fixed 16.2-cm-diameter wire coil is perpendicular to a magnetic field 0.79 T pointing up. In 0.15 s , the field is changed to 0.34 T pointing down. Part A: What is the average induced emf in the coil?

30. ## chemistry

For the reaction, A = B + C, the rate law is kA]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant? a. 0.00450 s-1 b. 0.0290 s 1 c. 0.00530 s-1 d. 0.0150 s-1 e. 5.40 s-1

31. ## Stoichiometry

[Volume-Volume].How many liters of HF gas will be produced when 30.0 liters of hydrogen reacts ? Equation:h2+f2--->2HF i need help

32. ## Pre-algebra

Sara is 24 years younger than Joe. Six years ago she was half as old as he was. How old is he now?

33. ## calculus

from the equation: x^4 - i = 0 x^4 = i how do you get: The solutions are the fourth roots of i = cos(pi/2) + isin(pi/2) I don't understand how you get pi/2? please full and detailed explanation please.

34. ## trig

if 10 students enter projects in the art show, how many different ways can they come in 1st, 2nd, and 3rd place? would you go 10^3 OR 10TIMES 3? This is not a trig question. Neither of those answers is correct. After making one of ten possible choices for

35. ## Pre-Cal (Help Plz)

The question I've been trying to figure out is asking me to explain how the graph of (g) is obtained from the graph of (f). The graphs are as followed: - f(x)= x^(2)-4 - g(x)= [x^(2)-4] (Note: the Brackets represent absolute value symbols around the

36. ## Vba

A babysitter takes care of 20 kids. When taking care of all the kids she gets paid \$50 per kid. However, for every \$5 more she charges, a kid leaves. How many kids should she babysit to max her profit? I want to write a code that asks user to enter the

37. ## Calculus

A particle is moving with acceleration a(t) = 30 t + 12. its position at time t =0 is s(0) = 11 and its velocity at time t =0 is v(0) = 16. What is its position at time t = 8?

38. ## physical science

I must divide a block-letter shaped L diagram of a piece of land into four lots that are the same size and shape. The perimeter has one number next to each of the 6 sides. The numbers are (clockwise, beginning at the top) 1, 1, 1, 1, 2, 2. Can you help me

39. ## Math (Physics)

Problem: What wavelength photon would be required to ionize a hydrogen atom in the ground state and give the ejected electron a kinetic energy of 19.1 eV ? Answer--> λ =______nm [Note: I got 3.8x10^-8. I got it wrong twice] My steps: (32.7 eV)(1.6x10^19)=

40. ## mathe

The longer sides of an rectangle are 3 times as long as the shorter sides. If the perimeter is 100 ft, what are the dimensions of the rectangle

41. ## algebra

parts x4= strap

42. ## Excel Filtering

Hi I'm trying to filter data between 3 different columns. I want it so the data filtered so data in column a is smaller than column b, which is smaller than column c. I try to filter but it only allows me to use filter criteria from the individual column.

43. ## calculus

Find the number c if the line y=x is to be tangent to the graph of f(x)=x^4+c. what are the coordinates of the points of tangency?

44. ## Math

Hmm... i need someone to explain about Formualas however u spell it.

45. ## physical science

I was given a diagram in the shape of an "L"-looks like a block letter L--around the perimeter are the numbers 2, 1, 1, 1, 1, and 2. It says divide this diagram of a piece of land into four lots that are the same size and shape. I have been trying since

46. ## Chemistry

To neutralize a solution of NaOH and use the least volume of acid, you should select I. 1.0M HCl II. 1.0 M HC(2)H(3)O(2) III. 1.0 M H(2)SO(4) (A) I only (B) II only (C) III only (D) I and II use equal and lesser volumes. (E) I, II, and III use the same

47. ## Maths

What is the probability that an year will have 53 Tuesdays

48. ## Algebara

How do you find the square root of 14 without a calculator? I know I need to use the square root of 9 which is 3 and the square roots of 16 which is 4. I know the answer is gonna be closer to 4 because 14 is closer to 16. I just can't figure how to get the

49. ## Pre-Cal: Plz help!

Simplify and show work: [(X^(2)+3)^(1/3)](-1)(x^(-2))+[1/3(x^(2)+3)^(-2/3)](2x)(x^(-1)) My answer key says that it's this but I have no idea how to get to it. I've tried 4 times already: [-(x^(2)+9)]/[(3x^(2))(x^(2)+3))^(2/3)]

50. ## Pre-Cal

Simplify and show work: [(X^(2)+3)^(1/3)](-1)(x^(-2))+[1/3(x^(2)+3)^(-2/3)](2x)(x^(-1)) My answer key says that it's this but I have no idea how to get to it. I've tried 4 times already and failed each: [-(x^(2)+9)]/[(3x^(2))(x^(2)+3))^(2/3)]

51. ## Pre-Cal

Find all Real solutions of the Equation: (ENter as comma sparated answers, if there are no real solutions then just leave as NRS) x^(4/3)-9x^(2/3)+14=0 x=?

52. ## Excel Filtering

Return 2005 Return 2006 Return 2007 I have a data table with returns for 3 different years. I want to use a filter that only includes records where the return is increasing each year(i.e.: 2005

53. ## Excel

Say this is my cell: 2013 *aaron e. pacheco*9743 2nd Avenue*Boca 33431 *pacheco@fau.edu*9049 how would i use the text function to extract the first, middle, and last names from a list of cells like the one above with differing name lengths? and possibly

54. ## Computer Programming

A babysitter takes care of 20 kids. When taking care of all the kids she gets paid \$50 per kid. However, for every \$5 more she charges, a kid leaves. How many kids should she babysit to max her profit? I want to write a code that asks user to enter the

55. ## math

what is algebraic fractions and how do you do them?

56. ## science

What the the primary consumers in the desert biome

57. ## which class is best to take of the three

A. Psychology B. Literature and Arts C. Journalism (Newspaper)

58. ## Trigonometry

simplify: 2sin35 deg times cos35 deg.

1. ## quantitative chemistry

posted on April 24, 2018
2. ## Earth Science (check answers)

I have 20 questions tho...

posted on February 15, 2018
3. ## Geometry

Total number of outcomes when the two dice are rolled 32

posted on February 8, 2018
4. ## Social Studies (Check, Please!)

Great nothing wrong

posted on December 30, 2017
5. ## Social Studies

Yea he's correct -_-

posted on November 30, 2017
6. ## math

54

posted on November 1, 2017
7. ## Science

You can also use a filter for ocean water and proceed to than boil my friend.

posted on October 27, 2017
8. ## Science

Well first it depend where you got it from. From ocean water its best to just boil it for about 6-8 hours. If it's lake water you need a need a filter. This gets the particles, dirt and some of the chemicals out of the water. It is wise to boil the water

posted on October 27, 2017
9. ## Science!

I actually got A. But it's still 11.0 grams. Whatever your says for #9... it's 11.0 grams. :)

posted on October 27, 2017
10. ## Math

What about the second half? But the first 4 are correct.

posted on October 27, 2017
11. ## Sociology

For my answers I put, 1). D 2). False 3). True 4). B Could someone plz confirm these

posted on May 2, 2017
12. ## Math (Physics)

Yes Sir

posted on April 25, 2017
13. ## Math (Physics)

Part A answer is n= 6.87x10^3

posted on April 25, 2017
14. ## Math

Payah aa nak jawab soalan ni

posted on September 4, 2016
15. ## Algebara

Yes there are many sites but not one of them shows you how to do this, appreciate you trying to help

posted on August 16, 2016
16. ## Pre-Cal (Help Plz)

posted on June 8, 2016
17. ## Pre-Cal (Help Plz)

I looked at the graph and they both look similar. I'm not sure how to put it into the proper words. Is there anyway you could explain it to me? I'm having trouble.

posted on June 8, 2016
18. ## Pre-Cal

Thank you for the help Mr. Steve

posted on May 25, 2016
19. ## Pre-Cal

Thank you Mr. Steve

posted on May 25, 2016
20. ## math

What's the area?

posted on May 4, 2016
21. ## Math

the one with 5 cups of chocolate. thanks!!!!!!!!:)

posted on October 7, 2015
22. ## Simplfing Fractions

posted on October 7, 2015
23. ## Physics

ernfrehjfr

posted on April 6, 2015
24. ## Vba

sorry, the input box above is supposed to ask how many gallons* of oil were produced

posted on July 8, 2013
25. ## physics

First set up your cartesian coordinate system. You find that the "magnitude" of the velocity vector is the hypotenuse of your newly formed right triangle. Use trigonometric functions (sin,cos,tan) to find this x-component of the vector.

posted on November 12, 2012
26. ## Physics

x=Acos(wt) x= position A=amplitude (in a circle radius is always amplitude) w= angular frequency t= time(s) step1: convert rad-> degrees w=1.2 radians*57.29 (constant)= 68.75degrees step2: x=Acos(wt) x=.65m*cos(68.75degrees*time) just substitute time into

posted on May 11, 2012
27. ## Physics - Submerged Cylinder

h=(2*sigma*cos(theta))/(rho*g*r) r= radius sigma= 0.123(1-0.00139T) theta=contact angle (for water=0) rho=density

posted on January 29, 2011
28. ## physics calc based

Had problems with the same question.

posted on February 4, 2010