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. 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
4. 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
5. 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
6. 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
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. social studies

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

asked on December 1, 2010
9. 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
10. 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
11. 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 's, 54 's, 29 's. Fill in the blanks, using the options below; show work.

asked on March 28, 2013

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 13. 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 14. 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 15. History Why was the act of toleration enacted? A To ensure African Americans could Maintain their own religious practices B To provide freedom of religion for the Jews C To retain a separation between the church and state D To safeguard freedom of worship to asked on October 6, 2016 16. 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 17. 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 18. Physics A car is traveling North. In which direction are the wheels turning. This is under the torque chapter asked on October 24, 2015 19. 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 20. 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 21. 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 22. 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 23. 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 24. 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 25. math what is 84 over 100 in simplest form? If i had a calculater i could help you but i can't do it on paper hit me up this is shawn and help me with my problem I don't know what you call simplest form? 84/100 could be written as 0.84. If you want it reduced to asked on January 31, 2007 26. 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 27. 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 28. 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 29. 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 30. 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 31. 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 32. 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 33. 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 34. 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 35. 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 36. Physics A car is traveling North. In which direction are the wheels turning. This is under the torque chapter asked on October 24, 2015 37. Civics The way good leaders can protect the interest of their followers asked on June 27, 2019 38. 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 39. 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 40. 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 41. 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 42. 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 43. 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 44. 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 45. 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 46. 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 47. 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 48. 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 49. 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 50. 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 51. 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 52. 9th grade s8impliy this exponential expression): -2 7 -8 ) 6 -9)8 (7) * (x) * (w * (x *(4) * -3) (w asked on January 6, 2010 53. 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 54. 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 55. 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 56. algbra According to some students, what is the true purpose of homework asked on November 16, 2010 57. 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 58. 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 59. life orientation how can sports detract nation building asked on March 10, 2019 60. 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 61. 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 62. 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 63. 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 64. 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 65. 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 66. math Look at the numbers below. 75, 74, 72, 69, 65 A: describe the pattern asked on November 6, 2014 67. social studies institutions that promote national unity asked on June 27, 2019 68. 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 69. Physics A small block of mass m = 1.3 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 54.0 m above the bottom of the loop of radius R = 19.0 m. What is the kinetic energy of the mass at the point A asked on December 24, 2013 70. MIPS Assembly programming Hi there, I need to implement in assembly mips an iterative binary search method. Here's my code: # this program implements binary search # the equivalent pseudo code is the following: # first = 0 # last = size -1 # while (last - first > 1) { # mid = asked on January 7, 2012 71. 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 72. ICT explain five uses of ICT in communication, timing and control and information processing and data storage asked on May 14, 2019 73. math use your calculator.show 14. broken keyr is 1. show 2 ways asked on September 21, 2011 74. 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 75. history who were the Cherokee mound builders? These mound builders lived long before the Cherokees existed. http://en.wikipedia.org/wiki/Mound_Builders http://www.mississippian-artifacts.com/ Thank you for using the Jiskha Homework Help Forum. Since you asked on April 9, 2007 76. 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 77. 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 78. 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 79. 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 80. 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 81. Chemistry What is the number of grams of Hydrogen in 5.45 x 10^22 molecules NH3? asked on October 9, 2010 82. 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 83. math In a school, 156 students passed geography or history. There were 75 students who passed in both subjects. If 9 more passed Geography than history, find how many were taking each subject asked on July 29, 2019 84. 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 85. physics An object is located 30 cm to the left of a converging lens whose focal length is 50 cm. (a) Draw a ray diagram to scale and from it determine the image distance and the magnification. (b) Use the thin lens and magnification equations to verify your answer asked on March 20, 2012 86. 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 87. english _____ describes the life cycle of a star. asked on March 8, 2017 88. 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 89. calculus -find the equation of the tangent line to the curve y=5xcosx at the point (pi,-5pi) -the equation of this tangent line can be written in the form y=mx+b where m= and b= -what is the answer to m and b? asked on February 24, 2011 90. math a plumber charges$25 for service call plus $50 per hour what is the cost 8 hours? What is 10 hours? asked on May 17, 2016 91. 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 92. Algebra Find the numbers that each letter stands for. EFGHx4=HGFE E= F= G= H= asked on October 30, 2011 93. Basic science In a machine, a load of 150N is lifted by an effort of 25N. calculate the mechanical advantage of the machine. asked on August 25, 2019 94. 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
95. Physics

A rubber ball filled with air has a diameter of 25.0 cm and a mass of 0.540 kg. What force is requiered to hold the ball in equilibrium immediately below the surface of water in a swimming pool? Start equation out by using sumF = ma Answer is 74.9 N I just

asked on November 11, 2010
96. solving two-step inequality

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

asked on June 9, 2015
97. 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
98. 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
99. 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
100. 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