# A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the

22,562 questions, page 127
1. ## Calculus (urgent!!)

Please answer the following questions about the function f(x)=e^(-0.5x^2) Instructions: If you are asked to find x- or y-values, enter either a number, a list of numbers separated by commas, or None if there aren't any solutions. Use interval notation if

asked by Catherine on April 6, 2011
2. ## physics

A 40g chunk of 90 degree C iron is dropped into a cavity in a very large block of ice at 0 degree C.Find what mass of ice will melt. (The specific heat capacity of iron is 0.11 cal/g degree C)

asked by christy on April 3, 2012
3. ## Math

Margarit liked to balance things. She balanced 3 pencil sharpeners and 2 one-gram blocks with a 100 gram weight and another one-gram block. She let x stand for the weight of one pencil sharpener and she claimed that x=30 grams. Was she correct?

asked by Anaiya on September 10, 2012
4. ## physics

a 0.85 kg block of aluminum is heated at atmospheric pressure so that its temperature increases from 22degC to 40degC. find the work done on the aluminum? find the energy added to it by heat? find the change in its internal energy?

asked by jenn on February 2, 2010
5. ## science

What is the relationship between a mineral and a rock? A.They are the exact same thing. B.A mineral is a building block of rocks. C.Minerals are only silicates while rocks are nonsilicates. D.A rock is always man-made while a mineral is naturally

asked by ash on October 3, 2012
6. ## Mechanics

Two blocks with equal masses m1 = m2 3.2 kg are connected via a pulley as shown in the above figure. Take the coefficent of kinetic friction to be 0.3 and the angle of the incline to be 40 degrees. Find the acceleration given that (Note: enter a negative

asked by Kevin on October 14, 2016
7. ## Physics (Mechanics)

Two blocks with equal masses m1 = m2 3.2 kg are connected via a pulley as shown in the above figure. Take the coefficent of kinetic friction to be 0.3 and the angle of the incline to be 40 degrees. Find the acceleration given that (Note: enter a negative

asked by Kevin on October 17, 2016
8. ## physics

major leaguer hits a baseball so that it leaves the bat at a speed of 29.0m/s and the angles of 36.9 above horizontal ignore resistance what two time is the baseball at a height of 10.0m above the point at which it left the bat? *what two times is the

asked by deb on September 28, 2013
9. ## math

If you are flying to a city 800 miles away, what will be the difference in flight times between flying into a 40-mph headwind and flying with a 40-mph tailwind if the plane's maximum speed with no wind is 160 mph?

asked by Christina on October 31, 2012
10. ## math

If you are flying to a city 800 miles away, what will be the difference in flight times between flying into a 40-mph headwind and flying with a 40-mph tailwind if the plane's maximum speed with no wind is 160 mph?

asked by Christina on November 1, 2012
11. ## Math

If you are flying to a city 400 miles away, what will be the difference in flight times between flying into a 40-mph headwind and flying with a 40-mph tailwind if the plane's maximum speed with no wind is 160 mph?

asked by Megan on March 22, 2017
12. ## physics

A Box (15.0 kg) is pulled up a 37 degree ramp with a force of 295 N. The frictional force acting on the block is 56.0 N. If Box travels 12.0 m up the ramp, determine the change in Box’s PEgrav.

asked by kimmy on December 3, 2009
13. ## Physics

If a 2 m tall man is looking at a plane mirror from an eye which is 20 cm from the top of his head, what is the minimum length that the mirror must be so that he can just barely see his whole body in the mirror? How far up from the ground must the mirror

asked by Brock on February 24, 2009
14. ## Physice

A 10 cm long, 2 cm wide wooden wedge is pushed into a soft wood block.Calculate: 1. The velocity ratio of the wedge. 2. The load on the soft wood if the effort applied is 30 N (assuming the wedge is 100% efficient).

asked by Yared moges on March 5, 2015
15. ## MLA

7. When a block quotation is used in a research paper, punctuation _______ the parenthetical citation. A. is set off by a comma from B. precedes C. is omitted from D. follows 8. It's necessary to use a/an _______ when a quotation is introduced by a verb.

asked by Ariel on February 7, 2018
16. ## Physics

A 2kg mass is attached to a spring of spring constant 20N/m. At t=0 the spring is at its relaxed position and the block is moving with a velocity of 4m/s to the right. Assume the positive direction is to the right. What is the speed of the mass when it is

asked by Kelly O'Reilly on July 22, 2013
17. ## Physics

A 28 kg canoe has a 24 kg passenger. The passenger is 2.0 m from the left end of the canoe and the center of mass of the canoe by itself is 2.9 m from the left end. a. Calculate the position of the center of mass of the canoe/passenger system. b. if we

asked by Ezek on October 21, 2012
18. ## physics

In the figure here, a box of Cheerios (mass mC = 1.4 kg) and a box of Wheaties (mass mW = 3.3 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is

asked by adek on October 16, 2013
19. ## Chemistry

I would really aprreciate if someone could help me, thank you so much. The white limestone cliffs of Dover, England, contain a large percentage of calcium carbonate(CaCO3). A sample of limestone weighing 84.4g reacts with an excess of hydrochloric acid to

asked by Amy on July 9, 2007
20. ## science

Plane sound wave of frequency 500 Hz fall normally on a smooth wall.At what distance from the wall will the air particles have maximum and minimum amplitude of vibration and the velocity of sound in air may be taken as 340 meter per second.

asked by Samundra on July 13, 2014
21. ## Physics

A skydiver is jumping from an airplane traveling at 10.0 m/s. The plane is 3520 m above the earth. The sky diver pulls his cord at 1760 m above the earth. Neglecting air resistance, how far does the skydiver travel horizontally before pulling the cord?

asked by Isis on June 14, 2013
22. ## physics

The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 25 knots head wind? The runway at the Tallahassee Regional Airport has

asked by batman on September 26, 2009
23. ## Physics

An airplane has an effective wing surface area of 17 m2 that is generating the lift force. In level flight the air speed over the top of the wings is 63.9 m/s, while the air speed beneath the wings is 58.0 m/s. What is the weight of the plane? Answer in N

asked by Jessica on December 8, 2012
24. ## science

if two plane mirrors are placed parallel to each other. A ray strikes at an angle of 45 degree thn how many images can be seen? If point object is placed on principal axis of a convex lens made up of two different material( above pole and below pole

asked by kishor on October 10, 2016
25. ## algebra

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane -x/3 f(x)=4+e ( if this makes sense, not sure how else to show it. the -x/3 is after the e like -x/3 to

asked by samantha on August 28, 2012
26. ## physics

from a disk of radius R,a concentric circular portion of radius r is cut out so as to leave an annular disc of mass M . the moment of inertia of this annular disc about the axis perpendicular to its plane and passing through its centre of gravity is

asked by Anonymous on December 4, 2013
27. ## Math

A pilot of a single engine airplane flies at a constant speed of 200 km/h at a bearing of 25 degree north east there is 40 km/h crosswind blowing south east 45 degree what are plane's actual speed and direction ?

asked by Vian on September 29, 2013
28. ## physics

The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 21 knots head wind? The runway at the Tallahassee Regional Airport has

asked by Brittany on December 4, 2010
29. ## physics

A block and tackle with a velocity of 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate,if the effort is equal to 60N,determine the distance moved by effort, work done by the effort in lifting the load and the loss of

asked by happiness on January 29, 2015
30. ## physics

Within the jet stream, a plane flies at 220 m/s at 19 degrees south of west. The jet stream itself is moving at 130 m/s due north. Find the velocity of the jet stream relative to the ground.

asked by Cali on June 1, 2018
31. ## Physics

A 1.5kg block starts to slide up a 25 degrees incline with an initial speed of 3m/s.It stopes after sliding 0.4m and slides back down.Assuming the friction force impeding its motion to be constant. 1).How large is the friction force? 2)What is the blocks

asked by Pierre on February 10, 2019
32. ## Chemistry

HELP PLEASE. I have no idea how to set this up. I tried using the q=mc(change in temp) equation but its not working out. A 59.8 g block of an unknown metal at 87.5 degrees Celsius was dropped into an insulated vesssel containing approximately 33 g of ice

asked by Taylor on September 30, 2014
33. ## physics

a point charge 50*10 raise to the power -6 C is located in the XY plane at the position vector r0= 2i^+3j^. what is the electric field at the point of position vector r=8i^+5j^?

asked by shreya on June 12, 2011
34. ## geometry

I need help with my math.. Can someone please help.. In the coordinate plane point X lies on line segment MN. The coordinates for MN are (-1,3) and (7,10). If the ratio of the length of MX to the length of XN is 2:5, what is the y-coordinate of point X?

asked by jamie on November 8, 2016
35. ## Physical Science

Hello, Do I have the correct answer for the following question? Thank You, My answer- 15 mm An object 5 mm high is located 15 mm in front of a plane mirror. How far from the mirror is the image located? 5.0 mm 7.5 mm 15 mm 30 mm

asked by Mandi on March 11, 2008
36. ## physics

A jet plane is traveling at a constant speed in a straight line in level speed. What does this tell you about the forces acting on it, what forces are acting on it .

asked by Melissa on March 25, 2012
37. ## math

In the xy-plane, lines a and b intersect at point (5,-2), and lines b and c intersect at point (-3,3). What is the slope of line b? Express your answer as a common fraction

asked by JJ on August 25, 2013
38. ## Physics

A playground is on the flat roof of a city school, hb = 5.70 m above the street below (see figure). The vertical wall of the building is h = 6.90 m high, to form a 1.2-m-high railing around the playground. A ball has fallen to the street below, and a

asked by Shadow on December 14, 2018
39. ## Physics

A projectile is accelerated from rest at point A along a circular track of radius 2 m, as shown in Fig. 5.1. Gravity acts in the z direction. The rate at which the speed of the projectile increases as a function of time, t, is at = 2t ms-2. What is the

asked by Lucy on October 16, 2014
40. ## trigonometry

An aircraft at C is spotted by two observers at A and B who are L=1650 feet apart. As the airplane passes over the line joining them, each observer takes a sighting of the angle of elevation to the plane, as indicated in the figure. If a=35 degrees and

asked by naisha on May 8, 2015
41. ## physics

A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre

asked by Edwin on March 27, 2010
42. ## physics

A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre

asked by Edwin on March 28, 2010
43. ## Maaaaath

When graphing rational functions, how do I know which directions the graphs go? Example, for equation y = 9/x - x, how would you graph this? Also, why is the horizontal asymptote for f(x)= 2+x / x-7 is 1 instead of 0?

asked by Anonymous on October 14, 2007
44. ## algebra

write the equations in standard form of the horizontal and vertical lines that pass through the point 1. (2,4) 2. (-5, 4)

asked by rachel on October 18, 2009
45. ## COLLEGE ALG

use the transformations to identify the graph of the function. then determine its domain, range, and horizontal asymptote. f(x)=4+3^X/3

asked by STUMPED on September 2, 2012
46. ## geometry

write the equations of the horizontal and vertical lines through the given points. (5,6) Can someone please show me and explain to me how to solve this? Thank you

asked by Sacha on October 12, 2014
47. ## geometry

find the volume of an industrial tank in the form of a horizontal cylinder whose radius is 2.6 yd, and whose length is 8.4 yd. rr=3.14

asked by Nancy on December 29, 2012
48. ## Math

1. Determine the vertex of the parabola: y= 7x^2+14x+6 2. For the following 2 functions,identify the horizontal and vertical asymptotes. a)f(x)= 3x(x-2)/x(x-1) b)g(x)= x/(x+7)^2

asked by Jimmy on October 31, 2010
49. ## physics

11. The horizontal range of a projectile is 4 3 times of its maximum height. Calculate the angle of projection.

asked by chimatiro on March 27, 2019
50. ## physics

A projectile is fired with an initial speed of 26.0 m/s at an angle of 30.0 above the horizontal. the object hits the ground 9.00 s later

asked by Anonymous on October 5, 2011
51. ## Math

1. Determine the vertex of the parabola: y= 7x^2+14x+6 2. For the following 2 functions,identify the horizontal and vertical asymptotes. a)f(x)= 3x(x-2)/x(x-1) b)g(x)= x/(x+7)^2

asked by Anonymous on October 31, 2010
52. ## Asympotes, Data?-Bump

If someone could help me on this, I'd appreciate it. f(x)= 2x/(x^2+1) Vertical: none Horizontal: none Minimum: x=-1 Maximum: x=1 Inflection Points: it seems like there are one or two, but i don't know how to factor f''(x)= 4x^3 + x^2 - 12x + 1 :/

asked by Alaina on May 5, 2013
53. ## calculus

Find a cubic function y = ax3 + bx2 + cx + d whose graph has horizontal tangents at the points

asked by Kyle on January 9, 2016
54. ## Art 7th Grade

Which type of line was not used to create this image A. Curved B. Diagonal C. Horizontal D. Zig Zag.

asked by Isabelle on September 15, 2017
55. ## Physic =s

A roller coaster travels 17.6 m at an angle of 38.0 ◦ above the horizontal. How far does it move horizontally? Answer in units of m

asked by Anonymous on September 12, 2011
56. ## Math

Can anyone explain Horizontal Equalities Equations? I also would appreciate examples of problems and the steps to solve the problem.

asked by Jo Anne on December 7, 2007
57. ## Calculus

Find the points on the graph of f where the tangent line is horizontal. f(x) = x3 - 15x2 (x, y) = ( , ) (smaller x-value) (x, y) = ( , ) (larger x-value)

asked by Mike on June 13, 2013
58. ## Math

for the curve y=2(3^x)+1, determine: the horizontal asymptote the y-intercept range end behaviour also, how would i sketch this?

asked by Rebecca on June 12, 2012
59. ## Calculus Need of Urgent Assistance

Let f(x) = x3 − 7x2. Find the point(s) on the graph of f where the tangent line is horizontal. (x, y) = I already got the smaller value, but I'm not getting the larger value right

asked by Anonymous on February 11, 2011
60. ## Physics

A football player kicks with a speed of 21 m/s at 37 degree to the horizontal. How long is the ball in the air?

asked by Cullen on March 8, 2015
61. ## Math

Calculate the average mathematical gradient of a slope that rises 450m over a horizontal distance of 1.8 km.

asked by Sutina on June 12, 2010
62. ## math- 165 calculas

Find the horizontal asymptote of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = 5x^2 + 1/ 7x^3 − 2x^2 + 5

asked by akash on October 6, 2015
63. ## science

a ball falls on a horizontal from a height h,if the coefficient of restitution be e,find the distance before it will stop

asked by arka on March 4, 2015
64. ## kinematics

A tennis ball is hit with a resultant velocity of 70 m/s^-1 at 20 degrees. What are the vertical and horizontal velocities?

asked by Madeline on April 17, 2011
65. ## physics

A box is pushed without acceleration 9.0m along a horizontal floor against a frictional force of 100N. How much work is done?

asked by nahum on August 24, 2010
66. ## Algebra 2

Can someone check my answers for the following questions? Thank you. 1)which is the equation of an ellipse with center (-4,2) and a horizontal major axis?

asked by Lily on April 6, 2008
67. ## math

Please help me. Thank you! I need help freshing my memory. How do you calculate the slope of a horizontal and a verticle line? I remember how to do a diagonal but that's it. Please and thank you.

asked by Amy on January 14, 2009
68. ## math

graph the function below. Determine the domain, range, and horizontal asymptote. show work f(x)=(7/5)^(x-3)

asked by Sara on January 11, 2012
69. ## physics

A roller coaster travels 10.6 m at an angle of 15.0◦ above the horizontal. How far does it move vertically ? Answer in units of m.

asked by Wendia on September 13, 2010
70. ## Calculus

At what point(s) does the curve defined by x^2-6x=6-6y^2 have horizontal tangents? I took the derivative and solved for y'. I got y'=-1/6x/y+1/2y. hmm...what am I suppose to do?

asked by Anonymous on November 18, 2007
71. ## geometry

a wheelchair ramp has an angle of 4.5,what is the horizontal distance needed to have a vertical rise of 1 foot?

asked by Chloe' on December 16, 2010
72. ## calculus

find the points on a graph of f where the tangent line is horizontal. f(x)= x^3 - 18x^2 (x,y)= (smaller x value) (x,y)= (larger x value)

asked by Eve on September 8, 2013
73. ## physics

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!

asked by i neeeeed helpp!! on December 7, 2010
74. ## pre calc

Use the derivative of f(x) = 6x7 + 7x6 to determine any points on the graph of f(x) at which the tangent line is horizontal.

asked by Morgan on November 10, 2014
75. ## Physics

A rock is thrown upward at 65.2 ◦ with respect to the horizontal. As it rises, its vertical component of velocity

asked by Brian on September 17, 2012
76. ## Physics

State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.

asked by Aliy on October 29, 2016
77. ## tokarara

Calculate work done if a force of 300N is applied at 30° to the horizontal and the body moves 20m

asked by tina loko on July 14, 2015
78. ## physics

A roller coaster travels 10.6 m at an angle of 15.0◦ above the horizontal. How far does it move horizontally? Answer in units of m.

asked by Wendia on September 13, 2010
79. ## physics

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?

asked by Anonymous on April 12, 2012
80. ## Calc

how do you find which points a tangent line is horizontal/vertical for decartes folium x^3+y^3=3xy?

asked by Anonymous on December 8, 2011
81. ## math

Explain how to use end behaviour to find the equation of the horizontal asymptote of a rational function.

asked by Kaplan on December 2, 2013
82. ## physics

a student does 314 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force?

asked by amber on January 27, 2011
83. ## Algebra II

Give the equations of any horizontal asymptotes for the graphs of the rational functions. h(x)=(7x²-8x-5)/(8x²-3x+9) g(x)=(x²+4x-8)/(x-8)

asked by CC on July 6, 2011
84. ## math ergent help someone please

Explain how to use end behaviour to find the equation of the horizontal asymptote of a rational function.

asked by Kaplan on December 4, 2013
85. ## physics

A ball rolls off a 1.40 m high table with an initial horizontal speed of 0.600 m/s. How far will it land?

asked by axel on January 29, 2015
86. ## Physics

Find the range at an arrow that leaves a bow at 45 m/s at an angle of 50 degrees above the horizontal level.

asked by Francis Gabriel on February 25, 2016
87. ## Elementary mechanics

what is common to the variation in the range and the hieght of a projectile. I'm thinking of horizontal acceleration pls what do u think

asked by jane on July 15, 2013
88. ## Physics

1. Could a horizontal axis of rotation be used satisfactorily in an experiment uniform circular motion? Explain

asked by Andrew on January 16, 2011
89. ## calc

Consider the following function. f(x) = 4x3 + x2 - 0.05x + 10 Find the two points on the graph at which the tangent line is horizontal. G

asked by Anonymous on September 30, 2010
90. ## math

5. State a rational function that satisfies all of the following: The y – intercept is 24 There is a horizontal asymptote at y = 3 There are vertical asymptotes at x = -1 and x = 4

asked by FUNCTIONS on July 8, 2013
91. ## PHYSICS

what is the angle velocity of an object in a horizontal circular part with radius 1.5 with a constant speed of 12/s

asked by tope on November 1, 2016
92. ## physics

An object is to be thrown through a window 3.5 m high a distance 7.5 m away. It is launched at an angle 70 degreesabove the horizontal.

asked by Anonymous on February 9, 2012
93. ## Physics

A roller coaster travels 41.9 m at an angle of 15.0◦ above the horizontal. How far does it move horizontally? Answer in units of m

asked by Anonymous on October 20, 2011
94. ## Math help

Calculate the average mathematical gradient of a slope that rises 450m over a horizontal distance of 1.8 km.

asked by SRay on May 28, 2010
95. ## calculus--please check

analyze the graph of the function f(x)=x^2+x-90/x+3 a. what is the domain? I think it is x‚-3 (-‡,-3)(-3‡) b. what is the equation of the vertical asymptote? is it x= -3 c. what is the horizontal asymptotes? none

asked by ladybug on December 27, 2012
96. ## calculus--please check

analyze the graph of the function f(x)=x^2+x-90/x+3 a. what is the domain? I think it is x‚-3 (-‡,-3)(-3‡) b. what is the equation of the vertical asymptote? is it x= -3 c. what is the horizontal asymptotes? none

asked by ladybug on December 27, 2012
97. ## physics

a projectile launched speed of 31.1m/s at angle 71.2 degrees above horizontal fill in table time 0 vx m/s 10.0m/s vy 29.4m/s ax? ay?

asked by rebecca on October 6, 2013
98. ## Asympotes, Data?

f(x)= 2x/(x^2+1) Vertical: none Horizontal: none Minimum: x=-1 Maximum: x=1 Inflection Points: it seems like there are one or two, but i don't know how to factor f''(x)= 4x^3 + x^2 - 12x + 1 :/

asked by Alaina on May 4, 2013
99. ## MATH _ GRAPHING RATIONAL FUNCTIONS

When graphing rational functions, how do I know which directions the graphs go? Example, for equation y = 9/x - x, how would you graph this? Also, why is the horizontal asymptote for f(x)= 2+x / x-7 is 1 instead of 0?

asked by Anonymous on October 14, 2007
100. ## maths

Find the x-coordinates of all points on the curve y=2sin-sin^2x at which the tangent line is horizontal.

asked by khela on October 29, 2010