# Determine the length and breadth of a rectangle if the length is 3cm less than twice the breadth, and the perimeter is 18

40,002 questions, page 172
1. ## Physics

A uniform plank of length 5.5 m and weight 219 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 447 N walk on the overhanging part of the plank before

asked by Mary on March 21, 2007
2. ## physics

When relaxed, an elastic cord has length L, cross section area A, mass M, and Young modulus Y. An object of mass m is hung from the ceiling using the cord. The system reaches a steady state. What is the longitudinal mass distribution lambda(z) of the

asked by aviva on December 27, 2014
3. ## Math

1. There are 14 blue marbles, 8 red marbles, and 12 green marbles in a jar. What is the ratio of the total number of marbles to the number of red marbles? (1 point) 24:8 34:8 8:34 8:24 2. Which of the following ratios is equivalent to fifteen over twenty ?

asked by Help!!! on February 27, 2017
4. ## physics

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

asked by mark on October 10, 2013
5. ## Physics

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

asked by Anonymous on October 10, 2013
6. ## physics

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

asked by anon on October 11, 2013
7. ## physics

A proton is acted on by an uniform electric field of magnitude 233 N/C pointing in the positive x direction. The particle is initially at rest. (a) In what direction will the charge move? (b) Determine the work done by the electric field when the particle

asked by mathew on March 29, 2015
8. ## AP Calculus

Consider the function f(x) = 1/4x^4 - 5/3x^3 - 3/2x^2 + 15x - 3. A. Find the relative extrema for f(x); be sure to label each as a maximum or minimum. You do not need to find function values; just find the x-values. B. Determine the interval(s) where f(x)

asked by Steph on January 16, 2017
9. ## Chemistry

1. The eleent gold, Au, has a face-centered cubic structure. (Density - 19.3 g/cm^3) (a) What are the # of gold atoms in 1 unit cell? (b) What are the # of unit cells in 1 mol? (c) What is the volume of 1 mol gold unit cells? (d) What is the volume of 1

asked by Supriya on November 8, 2014
10. ## Science: Chemistry

1. The element gold, Au, has a face-centered cubic structure. (Density - 19.3 g/cm^3) (a) What are the # of gold atoms in 1 unit cell? (b) What are the # of unit cells in 1 mol? (c) What is the volume of 1 mol gold unit cells? (d) What is the volume of 1

asked by Supriya on November 8, 2014
11. ## Physics

Consider a pendulum of length 4.557 m. The acceleration of gravity is 9.832 m/s2 . a) What is its period at the North Pole? Answer in units of s. b) What is its frequency? Answer in units of Hz. c) What is its period in Chicago, where g = 9.803 m/s2?

asked by Ellen on March 4, 2011
12. ## math help

Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . (b) Determine the level of confidence

asked by Tommy8 on June 22, 2013
13. ## Physics

A projectile is fired up into the air at a speed of 164 m/s at an angle of 37° relative to the horizontal. Ignore air drag. A.) Determine the MAXIMUM HEIGHT (above where it was thrown) the projectile will reach. m B.) Determine how LONG the projectile

asked by Cindy on September 6, 2012
14. ## Science

1. A study was done to find if different tire treads affect the braking distance of an Army Jeep. The same road surface was used each time. Independent variable: Tire Treads Dependent Variable: Braking Distance 2. An experiment was performed to determine

15. ## Pre-Algebra

Okay so I have no clue how to determine if a relation is a function. Here is an example can you tell me how to determine this? D: Example: Determine whether the relation is a function. {(-5,5), (-2,5), (0,5), (2,5)} Thanks in advance

asked by Cheryl on May 2, 2011
16. ## physics

The maximum applied force of compression that one man’s thighbone can endure without breaking is 7.6 x104 N. The minimum effective cross-sectional area of the bone is 3 x10-4 m2, its length is 0.54 m, and Young’s modulus is Y=9.4x109 N/m2. The mass of

asked by stressedstudent on November 12, 2012
17. ## Algebra

Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 236 miles in the same time that Dana travels 224 miles. If Chuck’s rate of travel is 3 mph more than Dana’s, and they travel the same length of time, at what speed does Chuck

asked by Chuck on March 5, 2013
18. ## Algebra

Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 236 miles in the same time that Dana travels 224 miles. If Chuck’s rate of travel is 3 mph more than Dana’s, and they travel the same length of time, at what speed does Chuck

asked by Jon on March 5, 2013
19. ## Algebra

Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 236 miles in the same time that Dana travels 224 miles. If Chuck’s rate of travel is 3 mph more than Dana’s, and they travel the same length of time, at what speed does Chuck

asked by Jon on March 5, 2013
20. ## Algebra

Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 236 miles in the same time that Dana travels 224 miles. If Chuck’s rate of travel is 3 mph more than Dana’s, and they travel the same length of time, at what speed does Chuck

asked by Jon on March 5, 2013
21. ## Math

Kerry's computer keyboard is 18 inches long and 6 inches wide. Tim's keyboard has the same length-to-width ratio as Kerry's. Tim's keyboard is 12 inches long. how wide is Tim's keyboard? I can't figure out how to do this problem. the only thing that I

asked by ILTHSM_ on April 1, 2019
22. ## Physics

Robert constructs the apparatus shown and slides a block down a slope that is without friction until the block reaches the section, L, of length 1.85 m, which begins at height h2 = 2.0 m on a ramp of angle 30.0°. In that section, the coefficient of

asked by Alexis on November 15, 2016
23. ## physics

The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 10-8 Ù·m). The light bulb is plugged into a 120-V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be?

asked by james small help plz on October 10, 2015
24. ## Physics 11

2 men are fishing from small boats located 36m apart. Waves pass through the water, & each man's boat bobs up & down 15 times in 75s. At a time when 1 boat is on a crest, the other 1 is in a trough, & there is 1 crest between the 2 boats. f=15/75=.2Hz

asked by Kayla on June 7, 2017
25. ## Physics

A bungee jumper makes a jump into the Gorge du Verdon in southern France from a platform 182 m above the bottom of the gorge. The jumper weighs 740 N and comes within 66 m of the bottom of the gorge. The cord's unstretched length is 30.0 m. (a) Assuming

asked by Meisha on April 5, 2011
26. ## physics

A 3.9kg block moving at 2.0 m/s toward the west on a frictionless surface has an elastic head-on collision with a second 0.80kg block traveling east at 3.0 m/s. a)Determine the final velocity of first block. Assume due east direction is positive.

asked by phys 220 on February 21, 2015
27. ## Language Arts

# 2 Part 1 (worth 8 points) Mr. Peters learns to be satisfied with his life and decides not to use his third and final wish. Did Mr. Peters make the right decision to help him resolve his internal conflict? Compose an argument that is at least one

asked by PPPLLLEEAASSEE HHEELLPP!!!!!! on October 26, 2018
28. ## maths

When one end of a ladder,LM,is placed against a vertical wall at a point 5m above the ground,the ladder makes an angle of 37° with the horizontal ground. 1. Represent the information in a diagram 2. Calculate, correct to 3 significant figure,the length of

asked by victoria on January 14, 2018
29. ## Physics

15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. Comparing the work

asked by Anonymous on July 8, 2014
30. ## physics

As shown below, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that

asked by jim on March 22, 2009
31. ## physics

A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic

asked by mike on March 17, 2010
32. ## Physics Rotaional Kinetic Energy

A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic

asked by Anonymous on March 17, 2010
33. ## Physics repost

1)An ____ lens is used to produce a real image. A)convex B)concave C)plane D)diverging The link you gave me confused me b/c the closest thing I could find was convex. and you said concave mirrors produce virtual images. but the question doesnt ask for

asked by Jon on April 8, 2008
34. ## Physics

A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N

asked by Gareth on March 12, 2013
35. ## math

When it is assembled, a flute is 28 inches long. The middle piece m is 5 inches less than twice as long as the first piece f. The last piece l is two-thirds as long as the first piece. Find the length of each piece of the flute

asked by brenda on March 4, 2015
36. ## AP Physics

A uniform thin rod of length 0.3m and mass 3.5kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 3g bullet traveling in the horizontal plane of the rod is fired into one end of the rod. As viewed from

asked by Darlene on February 8, 2008
37. ## Algebra

There is a single track connecting Pittsburgh to Boston. The length of the track is 478 miles. Train A leaves Pittsburgh at 11:15 am traveling 87 mph. Train V leaves Boston at Noon traveling 99 mph. At what time will they crash? Where will they crash

asked by Patricia on March 19, 2019
38. ## electromagnetism

the middle wire carries 2A, and the bottom wire carries 3A. 2A (6 points possible) What is the magnitude of the force per unit length on the TOP wire in N/m? 1000 - incorrect 1000 What is the direction of the force on the TOP wire? left right up up -

asked by JuanPro on April 14, 2015
39. ## mechanics

A mild steel bar of length 10cm and width of 10mm is extended by 0.01 mm. Which of the following is equal to the change in width of the bar.(The Poisson's ratio of mild steel is 0.31) A 3.1x10-4mm B -3.1x10-4mm C 3.1x10-5mm D -3.1x10-5mm

asked by dmkp on February 24, 2013
40. ## mechanics of materials

a mild steel bar of length 10cm and width of 10mm is extended by 0.01 mm. Which of the following is equal to the change in width of the bar.(The Poisson's ratio of mild steel is 0.31) A 3.1x10-4mm B -3.1x10-4mm C 3.1x10-5mm D -3.1x10-5mm

asked by dmkp on February 22, 2013
41. ## General Mathematics

box with a square base is having a volume of 8 cubic meters. Let x be the length of the side of the square base and height of the box. What are the possible measurements of a side of the square base if the height should be longer than a side.

asked by Tris on July 25, 2016
42. ## Math (Rational Inequality)

A box with a square base is having a volume of 8 cubic meters. Let x be the length of the side of the square base and height of the box. What are the possible measurements of a side of the square base if the height should be longer than a side.

asked by Lhor on July 25, 2016
43. ## Math

Find the surface area of rectangular pyramids 1. Length= 1.15ft Width=0.82 ft Height of the slanted face =3.17ft Surface Area=7.1879ft^2 Formula for Rectangular Pyramid Surface Area : B+1/2pl B=area of base p=perimeter of base l=height of slanted face

asked by Jerald on February 5, 2014
44. ## math

A blueprint is a scale drawing of a building. The dimensions of the blueprint for Penny's doll house are 1/4 of the measurements of the actual doll house. The floor of the doll house has an area of 864 sq inches. if the width of the doll house is 2/3 the

asked by Taniyah on November 30, 2015
45. ## Chemistry

In water conservation, chemists spread a thin film of certain inert material over the surface of water to cut down the rate of evaporation of water in reservoirs. Franklin found that 0.10 mL of oil could spread over the surface of water of about 49 m

asked by Amy~ on August 24, 2010
46. ## Physics

A 4700 kg truck on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the truck is 189 N backward: a) Determine the values of the other forces acting on the truck. b) Draw a free body diagram

asked by Naz on March 10, 2017
47. ## Math

Elijah draws shapes on his graph paper.He draws a square with sides 1/2 inch long. He draws an equilateral triangle with sides that are 1/4 inch long. What is another measurement that describes the length of the triangle's sides ? a. 2/1 inch b. 2/2 inch

asked by Debora on May 13, 2013
48. ## math

Elijah draws shapes on his graph paper.He draws a square with sides 1/2 inch long. He draws an equilateral triangle with sides that are 1/4 inch long. What is another measurement that describes the length of the triangle's sides ? a. 2/1 inch b. 2/2 inch

asked by Debbie K on May 12, 2013
49. ## Chemistry

a radioisotope is called a tracer when it is used to 1 kill bacteria 2 kill cancerous cells determine the age of animal skeletal remains 4 determine the path of an element in an organism is it 3 ?

asked by Jazmin on May 10, 2011
50. ## Alg II

When you are solving a matix equation and the determinant of your coefficient matrix is zero, how can you determine when it is a no solution versus an infinitely many solution? nvm i figured it out. you have to determine whether the system is consist or

asked by Brenda on May 10, 2007
51. ## physics

The equation of motion of a simple harmonic oscillator is given by x(t) = (9.0 cm)cos(12πt) − (5.4 cm)sin(12πt), where t is in seconds. (a) Find the amplitude. Determine the period. (c) Determine the initial phase.

asked by Anonymous on April 29, 2018
52. ## Probability

Random variables X and Y are distributed according to the joint PDF fX,Y(x,y) = {ax,0,if 1≤x≤2 and 0≤y≤x,otherwise.} 1. Find the constant a. 2. Determine the marginal PDF fY(y). (Your answer can be either numerical or algebraic functions of y). For

asked by qwerty on March 18, 2014
53. ## High School Physics

The player kicks a football with an initial speed of v0 = 98 ft/s. Determine the two possible values for the angle of the kick, theta. The distance of the football field is 126 ft. Also determine the corresponding time at each of these two angles.

asked by . on October 25, 2012
54. ## probability

Random variables X and Y are distributed according to the joint PDF fX,Y(x,y) = {ax,0,if 1≤x≤2 and 0≤y≤x,otherwise. 1 Find the constant a. a= 2 Determine the marginal PDF fY(y). (Your answer can be either numerical or algebraic functions of y). For

asked by JuanPro on March 11, 2014
55. ## Dynamics

The acceleration of a perticle as it moves along a straight line is geven by a=(2t-1) m/s2. If x=1m and v=2m/s when t=0s, determine the particle's velocity and position when t=6s. Also, determine the total distance the particle travels during this time

asked by Dynamics Problems on July 12, 2014
56. ## High School Physics

The player kicks a football with an initial speed of v0 = 98 ft/s. Determine the two possible values for the angle of the kick, theta. The distance of the football field is 126 ft. Also determine the corresponding time at each of these two angles.

asked by . on October 25, 2012
57. ## math(mechanics)

the acceleration of a particle as it moves along a straight line is given by a=(2t-1)m/s^2, where t is in seconds.if s=1m and v= 2m/s when t=0,determine the particles velocity and position when t=6s. Also, determine the total distance the particle travels

asked by chanz11 on April 18, 2012
58. ## calculus

Can anyone walk me through the steps of solving either of these problems? 1)Determine the percentage of change of f(x)=e^0.9x at x=15 and x=30 2)For the demand function q=150(245-p^2), find E(p) and determine if the demand is elastic or inelastic (or

asked by Sally on April 10, 2008
59. ## High School Physics

The player kicks a football with an initial speed of v0 = 98 ft/s. Determine the two possible values for the angle of the kick, theta. The distance of the football field is 126 ft. Also determine the corresponding time at each of these two angles.

asked by Anonymous on October 25, 2012
60. ## Physics II

A teacher of 75.0 kg bungee-jumps (steps from rest) from a 100 m tower towards a river. The cord can stretch 40.0% of its unstrecthed length and has a breaking strength of 5000. N (if tension is greater than this, it snaps). The cord stretches .250 meters

asked by Jacob on September 17, 2012
61. ## Physics!!! :)

A student of mass 78 kg wants to walk beyond the edge of a cliff on a heavy beam of mass 180 kg and length 10 m. The beam is not attached to the cliff in any way, it simply lays on the horizontal surface of the clifftop, with one end sticking out beyond

asked by Ashley on January 5, 2010
62. ## trigonometry

A surveyor made two sections of the railroad bridge, both at 210 meters in length. Suppose that the maximum of elevation of each section is 75deg. When the bridge is closed, the water level is normally 13 meters below the bridge. a. When the bridge is

asked by Winsel on August 14, 2010
63. ## physics

a uniform beam with a weight of 51.3 N and a length of 3.23 m is hinged at its lower end, and a horizontal force Upper F Overscript right-arrow EndScripts of magnitude 64.0 N acts at its upper end. The beam is held vertical by a cable that makes angle θ =

asked by bert on May 8, 2016
64. ## physics

A massless rod of length 1.00 m has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. The system rotates about a fixed axis perpendicular to the rod that passes through the rod 30.0 cm from the end with the 3.00-kg mass attached.

asked by tuni on June 24, 2012
65. ## Math

Determine the remainder of the following polynomial by remainder theorem. x^3-4x^2+x-6 divided by x+2. If x+2 is a factor, determine the remaining factors.

asked by Jessy on December 9, 2013
66. ## algebra

Determine whether each expression is a polynomial. If it is a polynomial, find the degree and determine whether it is a monomial, binomial, or trinomial. 1. 7a^2b + 3b^2 – a^2b 2. 6g^2h^3k

asked by Sally on February 3, 2016
67. ## math

determine the value of k such that g(x)=3x+k intersects the quadratic function f(x)=2x^2-5x+3 at exactly one point determine the value(s) of k such that the linear function g(x)=4x+k does not intersect the parabola f(x)=-3x^2-x+4

asked by Melissa on October 24, 2011
68. ## Algebra 1

How can I determine a equation from a graph? How can I determine how to graph y = x^2 + x - 2? Or y = x^2 - 4x + 4? Am I supposed to use the slope method (rise and run)?

asked by Victoria on June 10, 2014

Angle a lies in the second quadrant and sina=7/25. a) Determine an exact value for cos 2a b) Determine an exact value for sin 2a

asked by Anonymous on November 2, 2009
70. ## Chemistry

How would you determine if a given compound is acidic, basic or neutral? Also if given a compound, how would you determine if the state is aqueous (without a chart)?

asked by Liz on January 4, 2015
71. ## Physics

A heavy-duty stapling gun uses a 0.162-kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff spring called a "ram spring" (k = 32657 N/m). The mass of this spring may be ignored. Squeezing the handle of the gun first

asked by Leah on November 13, 2011
72. ## Algebra

1. The sum of the ages of James and Remy 5 years ago was 44. Twenty-two years from now, James' age will be 52 less than twice3 Remy's age then. Find their present ages. 2. Two numbers have a sum of 41. Their difference is 5. What are the numbers? 3. The

asked by McKenna Louise on January 4, 2014
73. ## physic

As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is Lw. Take down to be the positive direction, so that downward velocities are positive and the acceleration due

asked by koram on October 3, 2013
74. ## physic

As you look out of your dorm window, a flower pot suddenly falls past. The pot is visible for a time t, and the vertical length of your window is Lw. Take down to be the positive direction, so that downward velocities are positive and the acceleration due

asked by koler on September 29, 2013
75. ## Physics please check repost

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 4.0 x 10^5 Pa, and the horizontal divisions represent 4.5 x 10^-3 m3. The diagram is a upright rectangle divided into small squares

asked by Mary on April 23, 2007
76. ## Physics

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. a) determine frequency of these water waves in units of Hz?? b) determine the period of these water waves in units of s. ?? c) determine

asked by Bob on February 24, 2009
77. ## science

Now, three masses (m1 = 3.1 kg, m2 = 9.3 kg and m3 = 6.2) hang from three identical springs in a motionless elevator. The springs all have the same spring constant given above. Now the elevator is moving downward with a velocity of v = -2.9 m/s but

asked by kim on October 14, 2018
78. ## chemistry

At l=530 nm:aCuSO4=7.544L/mol-cm aKMnO4= 3.645 L/mol-cm At l=800nm: aCuSO4=2.908L/mol-cm aKMnO4= 5.412L/mol-cm you use a celleith a path length of 1.0cm An unknown solution containing both CuSO4 and KMnO4 gave an absorbance reading of 0.679 at 530nm and an

asked by Macy on November 7, 2010
79. ## physics

In the figure, a 4.3 kg block is accelerated from rest by a compressed spring of spring constant 660 N/m. The block leaves the spring at the spring's relaxed length and then travels over a horizontal floor with a coefficient of kinetic friction μk =

asked by brian on November 15, 2014
80. ## College Physics Help

A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from

asked by Angela on March 5, 2012
81. ## Physics

Two blocks connected by a rope of negligible mass are being dragged by a horizontal force F (Fig. P5.45). Suppose that F = 75.0 N, m1 = 14.0 kg, m2 = 19.0 kg, and the coefficient of kinetic friction between each block and the surface is 0.098. a)Determine

asked by Ali on October 5, 2015
82. ## 8th grade - science

the length of a string is known to be exactly 9.84cm. two students measured the string. student A used a ruler marked in centimeters and got a measurement of 10 cm. student B used a ruler marked in millimeters and centimeters and got a measurement of 9.8

asked by Michaela on October 2, 2009
83. ## math

if the weight of a fish varies jointly as the length and the square of the girth, and if a fish 11 inches long with a girth of 7 inches weighs 0.7lbs, find the weight of a fish 23 inches long with a girth of 18 inches.

asked by amber on September 5, 2012
84. ## math 2 questions plz help asap

1) Mr. customs is correcting the class's math homework on customary units. which of the following measurements is reasonable? A. a pencil is 12 feet long B. the back porch is 12 inches wide C. the 3rd hole on the golf court is 123 miles long D. the

asked by Jenna Brenn on December 3, 2015
85. ## physics

1.The greenish blue of water is evidence for the A) interaction between green and blue frequencies of light. B) reflection of red light. C) reflection of greenish-blue light. D) absorption of greenish-blue light. E) absorption of red light. 2.Atmospheric

asked by Sandhya on May 22, 2008
86. ## Mechanics (M1) A level?

A block moves on a rough slope of length 10 m inclined at 30 degrees to the horizontal. The coefficiebt of friction between the block and the slope is 0.4. The block starts from rest at the top of the slope. a) Find the speed at which the block reaches the

asked by Jat on April 29, 2012
87. ## statistics

The manager of a local gym has determined that the length of time members spend at the gym is a normally distributed variable with a mean of 80 minutes and a standard deviation of 20 minutes. What proportion of members spend less than 55 minutes at the

asked by mk. on April 26, 2013
88. ## college algebra

I have been stuck on this problem for over a week and I don't even know how to start the problem. Parabola equation y= 4(100 - x^2/2500) x and y are measured in feet A. Find the length of the road across the bridge B. find the height of the parabolic arch

asked by Karry on May 1, 2013
89. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by DMITRIC on March 8, 2011
90. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by DMITRIC on March 9, 2011
91. ## PHYSICS

A plank of uniform construction 5 metres in length and of mass 25kg. is balanced on a sawhorse stand which acts as a fulcrum. a bag of sand having a mass of 20kg. is suspended from one end of the plank. on the other end of the plank, a concrete block of

asked by JACKSON on March 8, 2011
92. ## Physics

Electrons in a narrow beam travelling at a steady speed of 5 x 10^7 ms^-1 are directed into the space between two oppositely charged parallel plates 50mm apart. The potential difference between the plates is 2500V. The initial direction of the beam is

asked by Ben on February 17, 2016
93. ## Physics

As your vacation job, you are driving a concrete mixer (mass 3300 kg). While driving down a hill (angle α = 29° with the horizontal), suddenly, a cow steps out on the road. You hit on the brakes, and with each locked wheel leaving 24 meters of skid

asked by Breaking on a hill on February 27, 2015
94. ## math

an open-topped box can be made from a rectangular sheet of aluminum, with dimensions 40 cm by 25 cm, by cutting equal-sized squares from the four corners and folding up the sides. Declare your variables and write a function to calculate the volume of a box

asked by Anonymous on March 25, 2014
95. ## accounting

Unit 1 Individual Project Deliverable Length: 2 to 3 pages Details: You have been asked to speak at a career fair for high school students in your home town. Specifically, you are making a presentation about your role as an accountant. •Describe for the

asked by Anonymous on August 28, 2010
96. ## Physics

A drunken driver crashes his car into a parked car that has its brakes set. The two cars move off together (perfectly inelastic collision), with the locked wheels of the parked car leaving skid marks 6.0 m in length. If the mass of the moving car is 2130kg

asked by Juicy on October 27, 2015
97. ## Physics

A helicopter drops a box from 120m in the air. a. Determine the time the box is in the air. b. determine the velocity the box would have right before it hits the ground c. Before the helicopter had a horizontal velocity of 55/s. Determine the distance the

asked by Karen on November 13, 2012
98. ## Physics

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 20.0° below the horizontal. A 40.0-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the

asked by Anon on October 3, 2014
99. ## Physics

What is the value of each of the angles of a triangle whose sides are 95, 150, 190 cm in length? I have tried to do this problem, don't get me wrong, but I don't really know where to go. Can someone tell me how to even approach this problem? The textbook

asked by Richard on July 6, 2014
100. ## Physics

A boat is at a point 120km West and 60km South of its destination. It sails in water which has a current of 20km/h North. In order to arrive at the destination, the captain decides to head the boat due East at 50km/h until he reaches a point due South of

asked by Anonymous on March 3, 2008