1. Physics

    Horizontal velocity: 138ft/s Vertical velocity: 109ft/3 A ball is thrown at 95 mi/h. The distance from the mound to the plate is 60.5 ft. Assuming the ball is pitched parallel to the ground, how far does it fall due to gravity by the time it reaches the

    asked by Jill on October 25, 2010
  2. math

    a freight train that is 1 mile long is traveling at 60mph. a second train that is 2 miles long is traveling 40mph. the trains are moving in opposite directions on parallel tracks. how many seconds does it take between the time their locomotives meet and

    asked by bob on October 17, 2010
  3. physics

    Four long, parallel conductors carry equal currents of I = 9.50 A. The current direction of the current is into the page at points A and B and out of the page at C and D. Calculate the magnitude and direction of the magnetic field at point P, located at

    asked by arthur on November 6, 2013
  4. General Physics II

    ___A __/__\ B/____\C radius (each side of this equilateral triangle) 0.5 m Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction (counterclockwise from the +x-axis of the net

    asked by Jen on February 11, 2012
  5. College physics

    Open Question: Two equal point charges of 5 µC are on the horizontal axis. One charge is at -10 cm, the other is at +10 cm.? These two charges don't move, they are STUCK, take the potential to be zero at infinity. Find the potential at the following

    asked by Julie on March 3, 2013
  6. Physics

    Capacitors are used in many applications where you need to supply a short burst of energy. A 143 μF capacitor in an electronic flash lamp supplies an average power of 12.6 kW to the lamp for 2.95 ms. To what potential difference must the capacitor

    asked by Ashley on January 31, 2012
  7. physics

    Two identical charges, q1 = q2 = 6.0 C, are separated by 1.0 m. a. Calculate the electric field and electric potential difference at point P, midway between them. b. Replace one of the charges with a charge of the same magnitude but opposite sign and

    asked by myra on May 15, 2012
  8. Physics-Please check

    Do charged particles always experience equal but opposite electrical forces? My answer is The electric forces are directly porportional to the quantity of the charge on the objects. Is that correct-we just started learning this and I'm trying to answer

    asked by Rachel B. on March 8, 2011
  9. chemistry

    How do i calculate the effective nuclear charge of a 3d electron of copper? what is the zeff. for a electron in the 3d orbital of copper. i looked up the answer to be 13.20, but i calculated 13.05 this is my work: (1s2)(2s2 2p6)(3s2 3p6)(3d10)(4s1)

    asked by mandy on November 10, 2008
  10. spanish

    After the party, tell a friend who was in charge of each task. Use direct-object pronouns in your answers. ¿Quién compró los mariscos? Rosa ¿Quién preparó la ensalada? Mirta y Lidia ¿Quién limpió el apartamento después de la fiesta? La profe

    asked by AYUDA ME PORFAVOR!! :) on November 2, 2010
  11. physics

    A 40.0 kg wagon is towed up a hill inclined at 17.9° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is

    asked by luc on October 10, 2009
  12. Business

    Which of the following is NOT an example of parallel structure? "Yoga can help you develop flexibility, reduce stress, and increase relaxation." "Learn how to analyze business audiences, improve your style, and edit thoroughly." "You are all encouraged to

    asked by Tina on February 2, 2011
  13. business Communication

    Which of the following is NOT an example of parallel structure? a. Yoga can help you develop flexibility, reduce stress, and increase relaxation. b. Learn how to analyze business audience, improve your style, and edit thoroughly. c. You are all encouraged

    asked by Sparkle on March 30, 2011
  14. Business Communication

    Which of the following is NOT an example of parallel structure? A. "Yoga can help you develop flexibility, reduce stress, and increase relaxation." B. "Learn how to analyze business audiences, improve your style, and edit thoroughly." C. "You are all

    asked by Ron on July 29, 2012
  15. Physics

    A 20 C charge experiences a 2 N force in an electric field. What is the strength of the electric field?

    asked by Jennifer on April 27, 2015
  16. Physics

    What condition is necessary for the flow of heat? what analogous condition is necesary for the flow of charge?

    asked by Taylor on March 10, 2009
  17. chemistry

    What charge would most likely form on an ion from elements in the following groups? a) Group 1A b) Group 2A c) Group 6A d) Group 7A

    asked by Rebecca on January 10, 2009
  18. Statistics/Probability

    The standard deviation of the masses of articles in a large population is 4.55 kg. Random samples of size 100 are drawn from the population. Find the probability that a sample mean will differ from the population mean by less than 0.8 kg.

    asked by Koylar on July 17, 2014
  19. Statistics for the Behavioral and Social Sciences

    Using a t test for dependent means based on .05 significance level, what is the power of each studies. Study Effect size N Tails (a) Small 20 one (b) Medium 20 one (c) medium 30 one (d) medium 30 two (e) large 30 two

    asked by Barbara Pratt on January 17, 2011
  20. statistics for the behavioral and social sciences

    Using a t test for dependent means based on .05 significance level, what is the power of each studies. Study Effect size N Tails (a) Small 20 one (b) Medium 20 one (c) medium 30 one (d) medium 30 two (e) large 30 two

    asked by chuckris on April 11, 2011
  21. 8th Grade Science

    Why do scientist use standered units of measurements? A.) Because their tools only measure in units B.) Because their units are either too small or too large to work with C.) So they can communicate findings without confusion D.) So that people who are not

    asked by ItsMe! on September 1, 2016
  22. Cosmology

    The solution of Olbers' Paradox is: - The universe is opaque at large scales - The universe expands - There is simply not enough starlight in the universe - Matter is clustered in such a way that the integral brightness converges

    asked by qwerty on January 8, 2013
  23. Social Studies

    Which of the following is a reason why Russia lost power in the early 1900s? A. Its army was too large. B. Unrest among the poor grew.++ C. Russia had a weak king. D. Russia failed to westernize.

    asked by dori on February 25, 2019
  24. english grammar

    write an essay on the the topic- government has granted a large amount of money to your school to construct a hobby room and buy instruments for your school orchestra. why would you like to have the two in your school.

    asked by tina on June 27, 2013
  25. math

    Deandre rented a truck for one day. There was a base fee of 16.99 , and there was an additional charge of 78 cents for each mile driven. Deandre had to pay 160.51 when he returned the truck. For how many miles did he drive the truck?

    asked by janae on February 12, 2013
  26. math

    Bill rented a truck for one day. There was a base fee of $18.95 , and there was an additional charge of .96 cents for each mile driven. Bill had to pay $135.11 when he returned the truck. For how many miles did he drive the truck?

    asked by teri on April 16, 2014
  27. Physics

    A long, straight metal rod has a radius of 6.00 cm and a charge per unit length of 36.0 nC/m. Find the electric field at the following distances from the axis of the rod, where distances are measured perpendicular to the rod. (a) 1.50 cm N/C (b) 13.5 cm

    asked by gita on September 13, 2013
  28. physics

    Two ping pong balls each have a mass of 1.4 grams and carry a net charge of 0.450uC. one ball is held fixed. at what height should the second ball be placed directly above the fixed ball if it is to remain at rest there?

    asked by jamal puritt on January 22, 2014
  29. algebra

    The total charge for a taxi ride includes an initial fee of $2.75 plus $2.25 for every 1/2 mile traveled. Joe took a taxi, and the ride cost him $56.75. How many miles did he travel in the taxi? What is the equation? Show your work.

    asked by syram on March 19, 2013
  30. statistics

    The probability that a 30-year old white male will live another year is .99842. What premium would an insurance company charge to break even on a 1-year $1 million dollar term life insurance policy?

    asked by nounou on July 16, 2010
  31. Math 221

    Joe rented a truck for one day. There was a base fee of $15.99 , and there was an additional charge of 97 cents for each mile driven. Joe had to pay $295.35 when he returned the truck. For how many miles did he drive the truck?

    asked by Maria on July 20, 2014
  32. math

    Dan rented a truck for one day. There was a base fee of 20.89 , and there was an additional charge of81 cents for each mile driven. Dan had to pay124.67 when he returned the truck. For how many miles did he drive the truck?

    asked by hassen on December 5, 2015
  33. Physics

    A neutral solid conducting sphere of radius R has charge Q deposited in it, and is sitting at the centre of a conducting shell of inner radius 2R and outer radius 3R. After the conductor reaches equilibrium, find the potential at R

    asked by Anonymous on July 5, 2016
  34. physics

    A proton travels with a speed of 3.39×106 m/s at an angle of 56.8 ◦ with a magnetic field of 0.305 T pointed in the y direction. The charge of proton is 1.60218 × 10−19 C. What is the magnitude of the magnetic force on the proton? Answer in units of

    asked by Anonymous on April 19, 2013
  35. physics

    A long, straight metal rod has a radius of 4.50 cm and a charge per unit length of 30.0 nC/m. Find the electric field at the following distances from the axis of the rod, where distances are measured perpendicular to the rod. a)3.00 cm b)13.5 cm c)120 cm

    asked by anonymous on November 1, 2010
  36. chem TITRATION

    1. If a student fails to remove a large air bubble in the buret before beginning the titration, what will be the effect on the volume of titrant required to reach the titration endpoint? A. The student will record a volume that is SMALLER than it should be

    asked by A on May 25, 2018
  37. Math. PLZZZ HELP ME!!!

    Jackson made a poster in the shape of a quadrilateral. Opposite sides of the poster are congruent and parallel. Which of the following names the shape of Jackson’s poster? A.square B.rhombus C.rectangle D.trapzoid•• Correct me

    asked by Jojo on February 16, 2016
  38. math

    2 planes parallel to the base of a pyramid cut the pyramid at 1/4 and 2/3 of the height as measured from the base up. If the volume of the pyramid is 100 cubic inches, what is the volume of the middle piece to the nearest tenth?

    asked by Ian on May 13, 2012
  39. math geometry

    P is parallel to q m angle 1 =(6x+y-4) m angle 2 = (x+9y+1) m angle 3 = (11x+2) A. Set up an equation(s) to find x and y. B. Show all work and solve for x and y. C. Use these values to find the values of angles 1, 2, and 3. Cant figure this out at all.

    asked by genny on January 19, 2016
  40. maths

    if two resistors of r1 and r2 ohms are connected in parallel in an electriccircuit to make a R ohm resistor, the value of R can be found from the equation 1/R= 1/r1+ 1/r2. if r1 is decreasing at the rate of 1 ohm/s and r2 is increasing at the rate of 0.5

    asked by sadia khan on January 19, 2013
  41. calculous

    3.Given the function f defined by f(x)=2x^3-3x^2-12x+20 a.Find the zeros of f b.Write an equation of the line perpendicular to the graph of f at x = 0 c. Find the x and y coordinates of all points on the graph of f where the line tangent to the graph is

    asked by Yoona on November 5, 2011
  42. physics

    An electron is released at the negative plate of a parallel plate capacitor and accelerates to the positive plate a) as the electron gains kinetic energy, does its electric potential energy increase or decrease? Why?

    asked by H on July 10, 2008
  43. math

    A rectangular field is to be enclosed by a fence. Two fences parallel to one side of the field divide the field into three rectangular fields. If 2400m of fence are available find the dimensions giving the max area.

    asked by steven on July 12, 2009
  44. Algebra1

    Complete this sentence with the correct choice: y = 4 is a horizontal line with ________. undefined slope. a slope of 4. a slope of 0. None of the above will make a true statement. Draw a line through y = 4 and parallel to the x axis. Now, what slope is

    asked by Margie on October 14, 2006
  45. Math

    1. What is the remainder when 2^190 is divided by 5? How do I approach these questions; do I write it down on paper, or use my calculator(how do I see the remainder?)? 2. Figure: A large right triangle, shortest base in on the ground, shorter height is

    asked by Linda on March 18, 2015
  46. Geometry

    The legs of an ironing board are equal in length and bisect each other at the point where they cross. What generalization about parallelograms ensures that the ironing board will always be parallel to the floor, regardless of the height of the board above

    asked by Rmz on January 22, 2010
  47. math

    Jackson made a poster in the shape of a quadrilateral. Opposite sides of the poster are congruent and parallel. Which of the following names the shape of Jackson’s poster? A.square B.rhombus** C.rectangle D.trapzoid

    asked by symone on February 15, 2019
  48. Physics

    Two springs, each with spring constant 20 N/m, are connected in parallel, and the combination is hung vertically from one end. A 10-N weight is then suspended from the other end of the combined spring. How far does the combined spring stretch as it comes

    asked by Ahmad on October 27, 2014
  49. GEOMETRY

    The legs of an ironing board are equal in length and bisect each other at the point where they cross. What generalization about parallelograms ensures that the ironing board will always be parallel to the floor, regardless of the height of the board above

    asked by Twg on August 19, 2009
  50. Maths

    A fence that is 4 metres tall runs parallel to a tall building at a distance of 1 metre from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked by Arjun on May 13, 2012
  51. Math

    The legs of an ironing board are equal in length and bisect each other at the point where they cross. What generalization about parallelograms ensures that the ironing board will always be parallel to the floor, regardless of the height of the board above

    asked by Anonymous on August 20, 2009
  52. electronics

    Which of the following statements is true with reference to an L-C resonant circuit? (1) The impedance of a parallel L-C circuit is low at resonance and higher at frequencies above and below resonance. The impedance of a series circuit is high at resonance

    asked by Anonymous on July 10, 2017
  53. physics

    What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

    asked by Tom on October 29, 2012
  54. physics

    What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

    asked by Tom on October 29, 2012
  55. physics

    What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

    asked by Tom on October 30, 2012
  56. physics

    What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45? Assume the force is applied parallel to the incline and the velocity is constant. (Enter the magnitude of the force.)

    asked by Tom on October 29, 2012
  57. PHYSICS HELP

    A box rests on a plank that is inclined to the horizontal. As the angle between the plank and the horizontal increases, does the component of the weight of the box parallel to the plank increase, decrease, or remain the same? Explain your answer. see the

    asked by Suzanne on October 16, 2006
  58. Geometry

    I need help with properties of a TRAPEZOID, please! -Are opposite sides congruent AND parallel? -Are opposite angles congruent? -Are the diagonals congruent? -Do the diagonals bisect eachother? I went on many sites to try and find the answers to these

    asked by Jenn on March 7, 2010
  59. Physical science

    A create is pulled across a horizontal surface with a force of 100N which makes an angle of 30 degrees with a horizontal.(a)draw a diagram of the horizontal and vertical components of the force.(b)resolve the force in its parallel and

    asked by Nomagcina on January 31, 2013
  60. Precalc

    My problem is this: Three friends want to share a circular 14-inch pizza equally by exactly only two parallel cuts. How far from the center must the cuts be? Hint: The pizza is a circle of radius 7 inches. My professor wants a neat and detailed solution

    asked by Tamara on March 6, 2017
  61. Alg 2 hon

    An executive flew in the corporate to a meeting in a city 1500 km away. After traveling the same amount of time on the return flight, the pilot mentioned that they still had 300 km to go. The airspeed of the plane was 600 km/h. How fast was the wind

    asked by Suchi on October 9, 2009
  62. Algebra

    for each equation tell weather its graph is a horizontal or a vertical line y=-4 write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation (1,3);y=3x+2

    asked by Pokemoncharzard on December 20, 2016
  63. physics

    a man pulls a 500 N block up a plane inclined 30 degrees with the horizontal with a force 300 N parallel to the plane. what net force tends to pull the block up the plane?

    asked by gigi on January 12, 2011
  64. calculus - please help!

    If two resistors R1 and R2 are connected in parallel, then the total resistance R measured in ohms is given by 1/R=1/R1+1/R2 If the resistance of R1 and R2 are increasing at 330 and 660 ohms per second respectively, then the rate of increase of R when

    asked by archi on November 7, 2011
  65. Geometry

    True or false answer and why according to the diagram. 1. line AE is Parallel to line BC 2. line AB is perpendicular to BC 3. measure of angle ECB is 90 degrees 4. angle BEC and ECB are Supplementary

    asked by some math student on November 3, 2017
  66. calculus

    5. Let f be the function given by f(x) = x3- 7x + 6. a. Find the zeros of f b. Write an equation of the line tangent to the graph of f at x = -1 c. Find the x coordinate of the point where the tangent line is parallel to the secant line on the interval [1,

    asked by Yoona on November 7, 2011
  67. Electrotechnics N4

    a circuit with 3 resisters {9 ohms 10 ohms and 12 ohms} connected in parallel with the source 150v\50HZ.use kitchoffs law to find the current of the circuit and the current across each resister?

    asked by hlehle on July 12, 2011
  68. Geometry

    The 8 rowers in the racing boat stroke so that the angles formed by their oars with the side of the boat all stay equal. Explain why their oars on either side of the boat remain parallel.

    asked by Anonymous on October 24, 2012
  69. Geometry

    A shopping center plot of land is in the shape of a parallelogram. Give two other facts about the plot or roads through it. I do not understand can you please explain? I know that A quadrilateral is a parallelogram if and only if it has two pairs of

    asked by purple on April 9, 2010
  70. Physics

    You are pulling a suitcase through the airport at a constant speed. The handle of the suitcase makes an angle of 45 degrees with respect to the horizontal direction. If you pull with a force of 7.5 N parallel to the handle, what is the force of friction

    asked by Ashli on September 14, 2010
  71. Math

    Jackson made a poster in the shape of a quadrilateral. Each pair of opposite sides of the poster are congruent and parallel. Which of the following names best describes the shape of Jackson’s poster? square rhombus rectangle** trapezoid please help fast!

    asked by InsertNameHere on February 9, 2017
  72. physics

    A centreate block mass 25kg is placed on a wooden plant inclined at an angle 32 dergree to the horizontal calculate the force parallel to the inclined plane that would keep the block rest .If the cofficient of fricition between the block and the plane is

    asked by awoyele tobi on November 8, 2016
  73. physics

    your boat departs from the bank of a river that has a swift current parallel to its banks. if you want to cross the river in the shortest amount of time, you should direct your boat a.) perpendicular to the current b.) upstream c.) downstream d.) so that

    asked by stu on March 8, 2008
  74. plane geometry

    a clock hangs on the wall. the wall is 71 ft and 9 inches long and 10 ft and f inches high. the night watchman notices that the hands of the clock are pointing in opposite directions and are parallel to one of the diagonals of the wall. what was the exact

    asked by jack on June 20, 2017
  75. Physics

    Laser light of wavelength 550 nm falls upon a diffraction grating. The slits are 25 micrometers apart and each have a width of 2 micrometers. There is a screen 2 meters away from the diffraction grating, parallel to the grating. A) At what angle does the m

    asked by Lexa on May 3, 2016
  76. Physics

    A small block travels up a frictionless incline that is at an angle of 30.0° above the horizontal. The block has speed 4.21 m/s at the bottom of the incline. Assume g = 9.80 m/s2. How far up the incline (measured parallel to the surface of the incline)

    asked by Anonymous on September 21, 2015
  77. plane geometry

    a clock hangs on the wall. the wall is 71 ft and 9 inches long and 10 ft and f inches high. the night watchman notices that the hands of the clock are pointing in opposite directions and are parallel to one of the diagonals of the wall. what was the exact

    asked by gwapo on June 20, 2017
  78. Trig

    A cylindrical tank, 6 foot in radius, lies on it's side parallel and against the side of a warehouse. A ladder leans against the building, passes over and just touches the tank, and has a slope of -3/4. Find the equation of the ladder and the length of the

    asked by Mary on September 23, 2012
  79. Physics

    You are pulling a suitcase through the airport at a constant speed. the handle of the suitcase makes an angle of 45 degrees with respect to the horizontal direction. if you pull with a force of 7.5N parallel to the handle, what is the force of friction

    asked by Jorge on September 15, 2010
  80. Math

    Water spraying from a large fountain follows a path modelled by the function h(d) = sa001-1.jpgd2 + 4d, for h ³ 0, where h is the height of the water above the fountain jet and d is the horizontal distance of the water from the fountain jet, both in Water

    asked by Alex on November 3, 2014
  81. Medical billing

    What conclusions can you draw about that challenges for record management in small, medium-sized, and large facilities? Do these challenges seem to be more closely tied to the size of the facility or to the number of records typically handled in a day?

    asked by Nickey on April 16, 2009
  82. English (PLEASE HELP!)

    What type of figurative language appears in the following sentence? The computer moaned and groaned as it rendered the large video file. A. Simile

    asked by Cassidy on February 4, 2016
  83. World History

    On what basis were the Khmer people able to coalesce into a single large kingdom? A. Exploiting the flooding of the Mekong River B. Wealth from mining and timber C. Wealth from its trading fleet D. Development of its pottery industry

    asked by anonymous on October 10, 2011
  84. math

    The figure below depicts a racetrack with ends that are semicircular. The length of the track is 880 ft (1/6 mi). Find l and r so that the area of the rectangular portion of the region enclosed by the racetrack is as large as possible. (Round your answers

    asked by Brandi1234 on April 15, 2013
  85. History

    Social Darwinists believed that A) a large empire was the key to economic growth. B) the best country would win any international competition. C) each nation should be made up of only one ethnic group. D) military might was the most important measure of a

    asked by Anonymous on July 18, 2012
  86. math

    The figure below depicts a racetrack with ends that are semicircular. The length of the track is 660 ft (1/8 mi). Find l and r so that the area of the rectangular portion of the region enclosed by the racetrack is as large as possible. (Round your answers

    asked by Sarah on April 1, 2015
  87. English

    What kind of sentences are they and how do I diagram them? Large brains "do" not necessarily "confer" superior intelligence. I ordered materials to use in the craft school "from a supplier" in Minnesota. "This done," I outlined lesson plans for my craft

    asked by Joy on November 29, 2013
  88. statistics

    Suppose a large shipment of microwave ovens contained 18% defectives. If a sample of size 228 is selected, what isthe probability that the sample proportion will be greater than 14%? (Round your answer to 4 decimal places)

    asked by colleen on January 23, 2015
  89. research

    A quantitative analysis method which aggregates a number of (similar) individual studies into a large data set from which to compute an over all “effect size” (based on similar study procedures and treatments) is commonly known as…?

    asked by helga on January 16, 2013
  90. psy240

    One day, Jim and Jack go out and both use large quantities of heroin. Although both did the same amount of drugs, Jack dies from an overdose. Discuss how drug tolerance and conditioning may factor into this outcome. Explain the possible reasons for their

    asked by trudy on October 23, 2009
  91. Introduction to statistics

    A researcher would like to estimate the population proportion of adults living in a certain town who have at least a high school education. No information is available about its value. How large a sample size is needed to estimate it to within 0.19 with

    asked by Elizabeth on July 17, 2014
  92. PSY 369

    Studies have shown that in large American cities, there is a relationship between the number of violent crimes and the number of stores that sell pornography depicting violence. Is this a positive or negative correlation? Provide an explanation.

    asked by Jay on June 15, 2013
  93. College Physics

    A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

    asked by JB on October 9, 2012
  94. DBA

    A quantitative analysis method which aggregates a number of (similar) individual studies into a large data set from which to compute an over all “effect size” (based on similar study procedures and treatments) is commonly known as

    asked by Younis on September 14, 2013
  95. Science

    The inner planets- Mercury, Venus, Earth and Mars- were formed by a. Supernovas b. repeated collisions of asteroid sized debris (My Answer) ****** c. masses of cold hydrogen and helium d. collisions of large galaxies

    asked by Sam on September 2, 2014
  96. Physics

    Suppose a nucleus of 93X236 fissions into two fragments whose mass ratio is 0.37:0.63. With the aid of the drawing, estimate the energy (in MeV) released during this fission. The drawing Shows A large. The A1 smaller the A2, A2 is nearly double the size of

    asked by Beth on August 3, 2012
  97. physics

    Pigeons have multiple-domain magnetite magnets within their skulls that are connected through a large number of nerves to the pigeon's brain. How does this aid the pigeon in navigation? (Magnetic material also exists in the abdomens of bees.)

    asked by Alice on May 16, 2012
  98. physics

    A rifle bullet with a mass of 16.5 g traveling toward the right at 285 m/s strikes a large bag of sand and penetrates it to a depth of 22.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

    asked by Sara on June 18, 2014
  99. Biology

    A large number of deer once lived on the Kalibab Plateau north of the Grand Canyon in Arizona, USA. In 1907 their predators, wolves, coyotes and pumas, were killed to protect the deer. What do you think happened after this?

    asked by Stoof on June 28, 2015
  100. chemistry

    briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.

    asked by Anonymous on March 23, 2011