# daniel

Most popular questions and responses by daniel
1. ## College Physics

A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its center. Attached to each end of the rod is a small mass m. Determine the angular momentum of the system about the axis. Write you're

asked on October 20, 2012
2. ## Algebra 2 A

A jet ski company charges a flat fee of $26.00 plus$3.25 per hour to rent a jet ski. Another company charges a fee of $24.00 plus$3.50 per hour to rent the same jet ski. Using a graphing calculator, find the number of hours for which the costs are the

asked on September 27, 2017
3. ## social studies

what ar all the anwsers to florida studies weekly on week 13

asked on December 1, 2010
4. ## Physics

A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the

asked on November 19, 2011
5. ## chemistry

three student chemists measured 50.0 mL of 1.00 M NaOH in separate Styrofoam "coffee cup" calorimeters ( Part B). Brett added 50.0 mL of 1.10 M HCI to his solution of NaOH; Dale added 45.5 mL of 1.10 m HCL 9 eqaul moles) to his NaOH solution. Lyndsay added

asked on January 17, 2011
6. ## Chemistry

Calculate the energy change associated with the transition of an electron from the n=2 shell to the n=5 shell in a Bohr hydrogen atom.

asked on November 18, 2012
7. ## physics

A convex mirror in an amusement park has a radius of curvature of 3.00m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image? I calculated the

asked on March 17, 2012
8. ## Statistics

A particular fruit's weights are normally distributed, with a mean of 353 grams and a standard deviation of 6 grams. If you pick one fruit at random, what is the probability that it will weigh between 334 grams and 344 grams?

asked on May 4, 2015
9. ## Statistics

Hello. I would like to ask a college statistics question. Q. One hundred draws are made at random with replacement from the box [1,2,2,5]. The draws come out as follows:17 [1]'s, 54 [2]'s, 29 [5]'s. Fill in the blanks, using the options below; show work.

asked on March 28, 2013
10. ## physics

A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 22° C when it was installed. What is its change in length when the temperature drops to a frigid -37° C?

asked on July 25, 2013
11. ## Physics

A green car with a mass of 900 kg is placed in the back of a yellow tow truck that has a pivot at one end. The car is held in place with a chain at the top end of the lift, as pictured below. The chain holding the car in place can withstand a maximum force

asked on September 15, 2018
12. ## Physics

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

asked on October 24, 2015
13. ## American Government

The city council of Smallton has just chosen a new chief administrator. She will carry out the policies of the council and hire department heads. If the council is not pleased with her work, it has the ability to dismiss her at any time. Which form of city

asked on November 2, 2017
14. ## Chemistry (Electrochemistry)

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced

asked on January 21, 2015
15. ## History

Which accurately describes the involvement of the Catholic church in medieval European government? A. the rules and rituals of the church guided the administration of government in Europe. B. The Catholic Church forced European Kings to adopt the

asked on November 1, 2017
16. ## Physics

A 2.0-cm thich bar of soap is floating on a water surface so that 1.5 cm of the bar is under water. Bath oil of specific gravity 0.60 is poured into the water and floats on top of it. What is the depth of the oil layer when the top of the soap is just

asked on November 10, 2010
17. ## geometry

Let $\overline{PQ}$, $\overline{RS}$, and $\overline{TU}$ be parallel chords of a circle. The distance between chords $\overline{PQ}$ and $\overline{RS}$ is 4, and the distance between chords $\overline{RS}$ and $\overline{TU}$ is also 4. If $PQ = 78$ and

asked on December 6, 2015
18. ## Math

A fuel oil tank is an upright cylinder, buried so that its circular top 12 feet beneath ground level. The tank has a radius of 6 feet and is 18 feet high, although the current oil level is only 13 feet deep. Calculate the work required to pump all of the

asked on February 14, 2018
19. ## Math

My question: A spinner looks like this: A disc divided into sections that might or might not be the same size, with a pointer that when spun will land on some part of the disc at random. The sections might be colours, or, as in these problems, have numbers

asked on January 8, 2009
20. ## Physics

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

asked on October 24, 2015
21. ## Chemistry

When 0.100 mol of CaCO3 (s) and 0.100 mol of CaO (s) are placed in an evacuated container with a volume of 10.0-L and heated to 385 K, PCO2 = 0.220 atm after equilibrium is established: CaCO3(s) ⇌ CaO (s) + CO 2 (g) An additional 0.300 atm of CO2 (g) is

asked on February 9, 2012
22. ## Physics

A young hockey player stands at rest on the ice holding a 1.3-kg helmet. The player tosses the helmet with a speed of 4.6 m/s in a direction 13° above the horizontal, and recoils with a speed of 0.27 m/s. Find the mass of the hockey player.

asked on November 19, 2011
23. ## Physics

An airplane ﬂies at airspeed (relative to the air) of 430 km/h . The pilot wishes to ﬂy due North (relative to the ground) but there is a 43 km/h wind blowing Southwest (direction 225◦). In what direction should the pilot head the plane (measured

asked on December 30, 2012
24. ## math

A kayaker paddles across a river at a constant speed of 4 miles per hour and a bearing of N 60 degrees E. Which current vector results in the kayaker's actual speed being 5.9 miles per hour and the kayakers actual direction being N 70 degrees E.

asked on July 3, 2013
25. ## physics

Five styrofoam balls are suspended from insulating threads.Several experiments are performed on the balls and the followingobservations are made: I. Ball A attracts B and repels C II. Ball D attracts B and has no effect on E III. A negatively charged rod

asked on February 19, 2012
26. ## Chemistry

Assume that a reaction occurs in which unknown substances R and S react to form unknown substances T and U. From the information below, determine the mass of substance T that will be formed if 45.0 grams of substance R reacts with 23.0 grams of substance

asked on May 20, 2008

A candy store makes a 9-pound mixture of gummy candy, jelly beans, and hard candy. The cost of gummy candy is $2.00 per pound, jelly beans cost$3.00 per pound, and hard candy costs $3.00 per pound. The mixture calls for two times as many gummy candy asked on September 27, 2017 28. ## Physics A 75 kg box slides down a 25 degree ramp with an acceleration of 3.60 meters per second squared. Find the coefficient of kenetic friction between the box and the ramp. What acceleration would a 175 kg box have on this ramp? asked on November 3, 2010 29. ## math Which of the following is the equation of a direct variation that has a constant of variation equal to -? y = x - -y = x y = -2x y = -x asked on May 19, 2011 30. ## Math The 3rd and 9th term of a g.p are 54 and 39,336 respectively.find the 6th term,sum of 4th term,sum of 4th and 7th term and product of 2nd and 5th term asked on October 30, 2018 31. ## Math a family budgets 1/2 of its income for housing and 1/3 for food what fraction of their budget do these expenses cover asked on October 18, 2016 32. ## Reposting chemistry help!!! A metal x forms two different chloride.if 12.g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively,show that the figure agree with the laws of multiple proportions.write there formulea plz i need the working..... asked on January 12, 2016 33. ## Math Suppose that a cyclist began a 450 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car met after 7.5 hr and the car traveled 30.4 mph faster asked on November 29, 2015 34. ## algbra According to some students, what is the true purpose of homework asked on November 16, 2010 35. ## Electrochemistry Ag2CrO4(s) + 2e- 2Ag(s) + CrO42-(aq) A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE; which has a reduction potential of 0.242 V relative to the SHE) and a asked on May 20, 2008 36. ## physics a spring of force constant 1500N/m is acted upon Hy a constant force of 75N .calculate the potential energy stored in the spring asked on December 21, 2015 37. ## Algebra 2 math In triangle GHI, angle H is a right angle, GH = 40, and cos G= 40/41. Draw a diagram and find each value in fraction and in decimal form. a) Sin G b. Sin I c. Cot G d. csc G e. cos I f. sec H - I have no idea how to do this asked on April 8, 2015 38. ## chemistry what is the molar solubility of AgBr(s) in 3.0M NH3(aq)? Ksp of AgBr(s) is 5x10^-13, Kf of Ag(NH3)2+ is 1.6x10^7 asked on December 3, 2018 39. ## life orientation how can sports detract nation building asked on March 10, 2019 40. ## Chemistry Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL asked on January 19, 2015 41. ## calculus Anti Derivative of F''(x) = 4 + 6x + 24x^2, f(0) = 3, f(1)=10 Not sure how to find the value of the constant for F'(x). asked on December 6, 2011 42. ## chemistry What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water? asked on April 7, 2013 43. ## Physics Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is asked on January 5, 2012 44. ## English As the headboy of your school write a speech on the send forth party of the principal of your school. asked on May 23, 2011 45. ## Physics A liquid (density = 1.65 g/cm^3) flows through two horizontal sections of tubing. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 275 cm/s, and the pressure is 1.20 x 10^5 Pa. This tubing then rises 50 cm to the second asked on November 11, 2010 46. ## Physics One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the asked on November 23, 2015 47. ## math Which of the following sets of ordered pairs is not a direct variation? (0, 0); (-2, 4); (3, -6) (1, 1); (-2, -2); (3, 3) (10, 2); (15, 3); (20, 4) (0, 0); (1, asked on May 19, 2011 48. ## Math A cylindrical water tank is 70cm in diameter to begin with it is full of water a leak starts in the bottom so that it looses 10 litres every 1 hour how long will it take for the water level to fall by 20cm. asked on June 10, 2016 49. ## physics A 2.44 kg object is subjected to three forces that give it an acceleration vector a = -(8.00 m/s2)i hat + (6.00 m/s2)j hat. If two of the three forces are vector F1 = (30.7 N)i hat + (17.0 N)j hat and vector F2 = -(12.0 N)i hat + (8.00 N)j hat, find the asked on October 19, 2014 50. ## physics A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right asked on February 22, 2012 51. ## Chemistry (Acid-Base) Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL asked on January 21, 2015 52. ## Physics A football player kicks a football with an initial velocity of 30m/s at an angle of 55 degrees relative to the flat ground. a)what is the speed of the football at its highest point b)find the highes point reached c)find the total time in the air d)how far asked on December 13, 2009 53. ## pre-algebra the scale on a map is 1 cm: 7 km. if two cities are 15 cm apart on a map, what is the actual distance in the cities? asked on December 5, 2018 54. ## Algebra 2. The Sugar Sweet Company is going to transport its sugar to market. It will cost$4200 to rent trucks, and it will cost an additional $150 for each ton of sugar transported. Let C represent the total cost (in dollars), and Let S represent the amount of asked on August 18, 2011 55. ## Algebra 2 A What is the minimum value for z=3x-1/2y over the feasibility region defined by the constraints? a.-4 b.-5 c.-3 d.-6 constraints x greater than or equal to 0 y less than or equal to 8 y greater than or equal to x y greater than or equal to -1/2x+6 asked on September 27, 2017 56. ## History 1. Why did William T. Sherman want to attack Columbia? (1 point) a. because he had lost a previous skirmish there *b. because he wanted to attack the capital of the state where the war began c. because it was located directly in his line of march from asked on February 12, 2019 57. ## Trigonometry a boy standing 70m away from a flag–post observes that the angles of elevation of the top and bottom of the tower on top the flag–post are 70^ and 69^ respectively. Find the height of the tower asked on October 23, 2017 58. ## math Look at the numbers below. 75, 74, 72, 69, 65 A: describe the pattern asked on November 6, 2014 59. ## math 1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks asked on April 5, 2013 60. ## Math Solve the system using elimination. 10y − 2x = 50 6x − 3y = 12 A. (5, 6) B. (2.1, 0.2) C. (2.1, 4.6) D. (6, 5) asked on January 5, 2016 61. ## Math Suppose that a cyclist began a 510 mi ride across a state at the western edge of the state at the same that a car traveling toward it leaves the eastern end of the state if the bicycle and car met after 8.5 hr and the car traveled 33.4 mph faster than the asked on November 29, 2015 62. ## Chem 4NH3(g) + 3O2(g) -> 2N2 + 6H20, K=10^80 @ certain temp initially, all the reactants and products have concentrations equal to 12M. At equilibrium, what is the approximate concentration of ammonia? asked on September 28, 2010 63. ## physics A group of particles is traveling in a magnetic field of unknown magnitude and direction. You observe that a proton moving at 1.50 km/s in the +x-direction experiences a force of 2.25x10- 16 N in the +y-direction, and an electron moving at 4.75 km/s in the asked on September 3, 2018 64. ## physics The displacement of a particle is given by S = a+bt+ct^2. Deduce the dimensions of the constants,a,b,and c appearing in the question. asked on March 8, 2016 65. ## Logic Riddle: It's 7:00 AM. You are asleep and there is a sudden knock on the door. Behind the door are your parents who came to have breakfast. In your fridge are bread, milk (pasteurized), juice, and a jar of jam. To answer, what will you open first? * Answer asked on May 21, 2019 66. ## Chemistry What is the number of grams of Hydrogen in 5.45 x 10^22 molecules NH3? asked on October 9, 2010 67. ## physics In a water park, people walk up a ramp before diving into the water below. If they cover a horizontal distance of 100 meters before diving down 50 meters, what is the angle made by the ramp with the ground? asked on March 25, 2014 68. ## Physics A cheetah running at 30 m/s is pursuing a zebra going in a straight line at 14 m/s. If the zebra has a 35 m head start, how much time does it take for the zebra to catch up? (Please show all work. I know the answer, but I need the step by step instruction asked on January 30, 2012 69. ## Chemistry For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the concentrations of all species and the pH of a 1.6 M solution of hydrazine in water. [OH-] = [H2NNH3+] = [H2NNH2] = [H+] = pH = asked on February 3, 2013 70. ## Chem 4NH3(g) + 3O2(g) -> 2N2 + 6H20, K=10^80 @ certain temp initially, all the reactants and products have concentrations equal to 12M. At equilibrium, what is the approximate concentration of ammonia? asked on September 28, 2010 71. ## math 1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. asked on April 5, 2013 72. ## English Identify the complete adjective clause and the word it modifies. I elected to take astronomy, which is not a required course. asked on June 9, 2011 73. ## math Suppose a white dwarf star has a diameter of approximately 1.6692x10^4 km. Us the formula 4pie^2 to find the approximate surface area of the star asked on November 15, 2010 74. ## Physics A wooden block of weight 24N lies on a horizontal table,when a force of 12N was applied to the block,it takes the block to "just slide "what is the coefficient of static friction between the block and the table asked on March 11, 2019 75. ## physics A student tries to produce notes of higher frequency by blowing a trumpet harder Discuss whether he will succeed? asked on January 29, 2012 76. ## social studies How is the government of Belarus different from those of other European countries? A. It is a theocracy led by religious leaders. B. It is a dictatorship with a ruler who has held power for many years. C. It is a monarch, in which power is handed down to asked on May 13, 2019 77. ## Math Actual lengths of pregnancy terms are nearly normally distributed about a mean pregnancy length (of about 38-39 weeks) with a standard deviation of 15 days: about what percentage of births would be expected to occur within 15 days of the mean pregnancy asked on February 12, 2013 78. ## Physics The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension? asked on November 30, 2009 79. ## US History Why were yeoman farmers often called "the backbone of the South" in the period from 1820 to 1850? A) When government officials wanted to oversee how Southern land was cultivated, yeoman farmers challenged the idea. B)Yeoman farmers grew vegetables, raised asked on March 2, 2016 80. ## ellipses If the major axis is vertical and has a length of 10 units,the minor axis has a length of 8 units,and the center C=(4,-2).Fill in the missing denominators for the equation and determine the distance from C to the foci (c). asked on May 11, 2012 81. ## calculus A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and asked on March 4, 2012 82. ## ICT explain five uses of ICT in communication, timing and control and information processing and data storage asked on May 14, 2019 83. ## financial accounting eckman company purchased equipment for$80,000 on january 1,2011 and will use the double declining balance method of depreciation. it is estimated that the equipment will have a 5 year life and a \$4,000 salvage value at the end of its useful life. the

asked on November 19, 2012
84. ## chemistry

A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^-5

asked on March 4, 2012
85. ## physics

A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to

asked on February 16, 2012
86. ## Texas History

Explain how the fall of the Alamo and the Goliad Massacre both helped and hurt the Texans` quest for independence in the Texas Revolution. PLZ HALP

asked on October 20, 2017
87. ## Chemistry

Complete and balance these half-equations. Express as net ionic eqn. 1.) Cr2O7(2−) → Cr(3+) (acidic solution) So far, I have: Cr2O7(2−) + 14H + 6e(-) →2Cr(3+) + 7H20 2.) C2O4(2−) → CO2 (acidic solution) Not sure how to do this one. Thank you.

asked on April 14, 2016
88. ## Chem

4NH3(g) + 3O2(g) -> 2N2 + 6H20, K=10^80 @ certain temp initially, all the reactants and products have concentrations equal to 12M. At equilibrium, what is the approximate concentration of ammonia?

asked on September 28, 2010
89. ## Math

Volume of water that enters the tank is 20m^3/h. Level of water inside the tank is 50% wich is equal to 400m^3. Pump is able to deliver 30m^3/h . how long will it take to empty the tank ?

asked on June 3, 2019
90. ## Math

the towns highway department marks a new road with reflective markers the road is 6 3/4 miles in length the markers are spaced every length 1/8 of a mile. What is an expression that can be used

asked on October 14, 2016
91. ## world geography

i need the answers to Geography Essentials, Europe, And Russia And Its Neighbors and East Asia And Southeast Asia and South Asia, Northern Africa, And Southwestern Asia Sub-saharan Africa, Australia,oceania, And Antartica Latin America And North America i

asked on December 26, 2011
92. ## english

Identify the complete adjective clause and the word it modifies. Many Californians who own homes live on hillsides.

asked on June 9, 2011
93. ## statistics

suppose you are testing Ho:p=.65 versus Ha: p

asked on April 20, 2011
94. ## Math (Probability)

I've worked out the first part of the question, just need help with the second part which is: The spinner has three sections. While no two are the same size, one of the sections is half the size of another. • You are more likely to get 2/3 than one if

asked on January 9, 2009
95. ## solving two-step inequality

Translate the following inequality into written language. 5x-6

asked on June 9, 2015
96. ## morakolo sec

To what extent can interpersonal conflict affect communication in a relationship?.

asked on February 22, 2015
97. ## physcial science

When 1 kg of ice at 0 degrees Celsius absorbs 80 kilocalories of heat, the ice undergoes a) a change of state b) a loss of energy c) a rise in temperature d) an increase in volulme The heat of fusion of water is 80 kcal/kg. That means that 1 kg of ice will

asked on June 22, 2007
98. ## math

Suppose the mean length of time that a caller is placed on hold when telephoning a customer service center is 23.8 seconds, with standard deviation 4.6 seconds. Find the probability that the mean length of time on hold in a sample of 1,200 calls will be

asked on February 21, 2019
99. ## Calculus

Prove that the average of LRAM and RRAM is equal to TAM.

asked on January 24, 2010
100. ## chemistry 11

Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of

asked on November 22, 2009