Wednesday
January 28, 2015

Search: An elevator (mass 4125 kg) is to be designed so that the maximum acceleration is 0.0900g. What is the maximum force the motor should exert on the supporting cable?

Number of results: 47,012

math
find the absolute minimum and maximum values of f(x)= x^(2/3) (3+x) on the interval [-2,1] i did a mistake on the other one sorry.
April 29, 2013 by help!!

Math
What is the maximum integer value of n, where n<148, that satisfies the following inequalities: sin(pi/2+(pi*n)/74)<0 and tan(pi−(pi*n)/74)<0?
May 16, 2013 by Crow

AP Chemistry
For the reaction 2C6H6+15O2 =12CO2+6H2O, what is the maximum amount of CO2 which could be formed from 5.12 g of C6H6 and 12.28 g of O2?
September 7, 2013 by Anonymous

Mathematics
Use Simpson’s rule to estimate ∫_0^2▒〖1/8 e〗^(x^2 ) dx with a maximum error of 0.1
October 15, 2013 by Dust

Math
Find the dimensions of a rectangle of maximum size that will fit into a half circle of radius 27
March 16, 2014 by Haris

algebra
What is the maximum value of c such that the graph of the parabola y = (1/3)x^2 has at most one point of intersection with the line y = x+c?
August 22, 2014 by Jack

math
Find the altitude of a right circular cone of maximum curved surface which can be inscribed of radius "r"
August 25, 2014 by tarsem singh

Chemistry
Give the maximum number of electrons in an atom that can have the following set of quantum numbers. (a) n=4 (b) n = 5, ml = 1, (c) n = 5, ms = 1/2
November 19, 2014 by Mahnoor

chemistry
When 85g of CH4 are mixed with 160g of O2 what is the maximum amount of CO2 that can be produced? plis help me ASAP
December 31, 2014 by zizi

Calculus
Find any absolute maximum and minimum and local maximum and minimum for the function f(x)=x^3-4x+5 on the interval [0,5). Make sure to prove that these points are max/min values. THis is what I did. f'(x)=3x^2-4=0 x= +/- 2/sqrt3 -2/sqrt3 is outside of interval so just use 2/...
April 17, 2011 by Janet

Chemistry
A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 375 mL of a solution that has a concentration of Na^+ ions of 1.10M? I tried multiplying .375 L by 1.10 M to get the ...
September 28, 2009 by Cory

Physics
In a pulley system, can the force of friction equal the tension in the rope? Let's say there is a mass on a table connected to a pulley system (placed at the corner of the table), while the other mass hangs from the table ... can the force of friction equal the tension? ...
October 17, 2009 by Lisa

Math
A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the minimum height. Approximate the instantaneous rate of change 1 second into the fall using the difference quotient when h is 0.01. a)-1.3650 b)-0.1973 ...
November 29, 2013 by Veronica

chemistry
The electrochemical cell described by the cell notation has an Eo of -0.37 V. Calculate the maximum electrical work (kJ) the cell has done if 331.73 g of Cu(s) (Molar Mass - 63.55 g/mol) reacts. Round your answer to 3 significant figures. Cu(s) l Cu+(aq) ll Sn4+(aq), Sn2+(aq...
November 26, 2010 by flame

chemistry
The electrochemical cell described by the cell notation has an Eo of -0.37 V. Calculate the maximum electrical work (kJ) the cell has done if 331.73 g of Cu(s) (Molar Mass - 63.55 g/mol) reacts. Round your answer to 3 significant figures. Cu(s) l Cu+(aq) ll Sn4+(aq), Sn2+(aq) ...
November 27, 2010 by flame

chemistry
The electrochemical cell described by the cell notation has an Eo of -0.37 V. Calculate the maximum electrical work (kJ) the cell has done if 331.73 g of Cu(s) (Molar Mass - 63.55 g/mol) reacts. Round your answer to 3 significant figures. Cu(s) l Cu+(aq) ll Sn4+(aq), Sn2+(aq) ...
November 28, 2010 by flame

physics
Sarah is pushing a 10 kg buggy and exerts a force of 100 N along the handle. If the handle is elevated at 37° to the horizontal, determine the component of the force that will move the buggy forward. If a frictional force of 60 N exists as she pushes it over a grass covered ...
June 3, 2014 by grey

physics
A spring is stretched 5 × 10−2 m by a force of 5 × 10−4 N. A mass of 0.01 kg is placed on the lower end of the spring. After equilibrium has been reached, the upper end of the spring is moved up and down so that the external force acting on the mass is given by F(t...
March 9, 2012 by swapnali

Physics(Please help)
A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.44 x 104 rad/s to an angular speed of 5.05 x 104 rad/s. In the process, the bit turns through 1.77 x 104 rad. Assuming a constant angular acceleration, how long would it take the bit to ...
June 7, 2012 by Hannah

Newton's Laws
1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can exert a constant pull of...
April 8, 2013 by Cole

Newton's Laws
1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can exert a constant pull of...
April 8, 2013 by Sarah

physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
April 6, 2011 by arun

physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
April 6, 2011 by arun

physics
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
April 6, 2011 by arun

Physics
A ball of mass 0.1 kg is suspended vertically from the ceiling with a "massless" string and brought to rest. The string is one meter long. When a force of 0.5N is applied 45 deg. below the horizontal, what will be the magnitude of the resulting angular acceleration of the ball...
November 4, 2012 by Guy

physics
A sled (mass 310 kg) is pulled across a stone floor with a coefficient of kinetic friction of 0.9. The rope that is used to pull it is at an angle alpha of 55 degrees with the horizontal. How hard (i.e., with what magnitude force) do you need to pull to make the sled speed up ...
February 22, 2014 by josh

Physics
A playground merry-go-round made in the shape of a solid disk, has a diameter of 2.63 m and a mass of 353.9 kg. Two children, each of mass 30.5 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses. (a) What torque is required to bring...
March 25, 2012 by Adam

physics help
An electric circular saw is designed to reach its final angular speed, starting from rest, in 1.16 s. Its average angular acceleration is 375 rad/s2. Obtain its final angular speed.
November 19, 2010 by harry

Physics
A tennis player hits a ball at ground level, giving it an initial velocity of 24 m/s at 57 degrees above the horizontal. (a) what are the horizontal and verticla components of the ball;s initial velocity? (b) how high above the ground does the ball go? (c) How long does it ...
June 7, 2009 by Sarah

Physics question
Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 N acting on its torso when it hit the ground. Question 1 Assuming the torso has a mass of 3800 kg , find the magnitude of the torso's upward ...
September 23, 2009 by Mia

Algebra 2
A factory is producing DVD and Blu Ray discs. For each case of DVDs they make $180 profit. For each case of Blu Ray they make $250. The DVDs take 3 minutes of machine time and 7 minutes of labor. The Blu Rays take 4 minutes of machine time and 12 minutes of labor. The maximum ...
January 31, 2012 by Precious

physics
when a horizontal force of 300N is applied to 75kg crate, it slides on a level floor opposed by a force of friction equal to 95N. what is the acceleration of the crate?
November 25, 2008 by Chelsea

Science Physics
Madison pushes with a 160-N horizontal force on a 20-kg crate of coffee resting on a warehouse floor. The force of friction on the crate is 80 N. Show that the acceleration is 4 m/s2.
May 17, 2014 by Peg

Physics
Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its maximum angular velocity is...
July 23, 2011 by falcon306

Physics 101
What is the net force of a 5.0 N force and an 7.0 N force acting on an object for each of the following conditions? (a) The forces act in opposite directions. ( )N (b) The forces act in the same direction.( )N ---------------------------------------------- A force of 2.4 N is ...
January 24, 2013 by reda

calculus
The circumference of a sphere was measured to be 74 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.) cm2 What is the relative error? (Round your answer to three ...
March 18, 2012 by William

Chemistry
A weather ballon is prepared to lift off at the North Pole. The balloon is filled with 15000 L of helium gas. The conditions at the launch site are 760 mm Hg and 0 degrees celsius. The balloon is then released and rises to a height of 20,000 m. The atmospheric pressure ...
May 2, 2009 by Julie

physics
A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...
March 27, 2012 by Adam

Physics
A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...
March 28, 2012 by Adam

physics
Two forces, 422 N at 24 and 278 N at 29 are applied to a car in an effort to accelerate it. mass of the car is 3000kg Find the resultant of these two forces. Answer in units of N Find the direction of the resultant force (in relation to forward, with counterclock- wise ...
November 12, 2011 by Peter

PHYSICS HELP!
A frictionless roller coaster is given an initial velocity of v0 at height h = 24 m . The radius of curvature of the track at point A is R = 31 m. The acceleration of gravity is 9.8 m/s2 a)Find the maximum value of v0 so that the roller coaster stays on the track at A solely ...
March 23, 2011 by john

physics
A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.5 N is applied. A 1.1 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x=5. cm and ...
November 26, 2012 by Anonymous

Physics
A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...
March 29, 2012 by Adam

physics
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 210 N applied to its edge causes the wheel to have an angular acceleration of 1.161 rad/s2. (b) What is the mass of the ...
November 9, 2011 by jim

Physics
A 40kg block is pushed along a level surface with a 200 N force at an angle of 35 degrees below the horizon. The coefficient of kinetic friction between the block and the surface is 0.15. What is the normal force acting on the block? What is the force of friction? What is the ...
February 5, 2012 by Krystal

physics
15)If a horizontal force applied on a resting object is greater than the force of friction, the object will. accelerate in the direction of the applied force 16)You are pushing a 55N lawnmower across the yard. Its handle makes a 55 degree angle with the ground. What force are ...
March 31, 2008 by Jon

physics
two forces act on a moving object with a mass of 27kg.one force has a magnitude of 12N and points south, while the other has a magnitude of 17N and points due west. Whats the acceleration of the object?
March 2, 2010 by ShaD

physics
an 8kg dog is sliding to the right on a frozen pond at 5m/s. suddenly, at the same moment, roy begins pushing the dog to the left and sally pushes the dog to the right.both roy and sally use a force of 16n and there is no friction. a)what is the net force on the dog? b)what is...
May 16, 2012 by lisa

Physics
A person of mass 83.8 kg escapes from a burn- ing building by jumping from a window situ- ated 25 m above a catching net. The acceleration of gravity is 9.8 m/s2 . If air resistance exerts a force of 109.1 N on him as he falls, determine his speed just before he hits the net. ...
June 18, 2014 by Kirbi

Physics
A block of mass 2.30 kg is pushed 2.38 m along a frictionless horizontal table by a constant 16.0 N force directed 26.9o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
October 1, 2013 by Chris

physics
A block of mass 2.40 kg is pushed 2.09 m along a frictionless horizontal table by a constant 18.6 N force directed 23.7o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
October 3, 2013 by beccs

PRE-CALC
Roland's Boat Tours sells deluxe and economy seats for each tour it conducts. In order to complete a tour, at least 14 economy seats must be sold and at least 5 deluxe seats must be sold. The maximum number of passengers allowed on each boat in 45. Roland's Boat Tours makes $...
September 25, 2010 by Janis

physics
A mass makes a projectile motion on a table (like the one in the projectile motion experiment) with inclination angle of the table as α=6o. The initial velocity and the initial angle are is 100 cm/s and 30 deg. respectively. What is the maximum height hmax ? (sin(6)=0.1, ...
December 21, 2012 by anonymous

Physics
A 1.2 kg block is attached to a horizontal 23 N/m spring and resting on a frictionless horizontal surface. The block is set oscillating with amplitude 10 cm and phase constant – π/2. A 2nd block with mass 0.8 kg moving at 1.7 m/s collides inelastically (the blocks stick ...
May 24, 2012 by Erick

physics
ball 1 has a mass of 5kg and a ball 2 has a mass of 10kg they both are dropped off a 20m tower. the force of gravity on the first ball is F1 and the force of gravity on the second ball is F2 what is the ratio of F1 to F2
November 24, 2012 by yocelyne t

physics
hello, i have this question. Calculate the average force of friction acting on a wooden block as it propelled along the floor? i have done the following solution first of all i don't know what average force of friction means? i found the Fapplied by strecthing the elastic 50 ...
June 5, 2007 by daniel

physics
a 125Newton box is pulled east along a horizontal surface with a force of 60Newton acting at an angle of 42degrees. if the force of friction on the box is 15 newton, what is the acceleration?
March 29, 2010 by jake

Physics
A horizontal force of 234 N causes a 350 N object to accelerate across a horizontal floor. if the coefficient of friction is 0.15, what is the value of the frictional force opposing the acceleration?
December 8, 2011 by Stephen

physics.....help me please....
1) A 1.0 kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. What is the speed of the 1.0 kg mass at the equilibrium position?
April 8, 2011 by arun

Physics
A horizontal force with a magnitude of 3.0 newtons applied to a 7.0 kilogram mass moves the mass horizontally a distance of 2.0 meters. Determine the work done against gravity in moving the mass. What is the formula that you use?
January 16, 2012 by Carlos

Physics Help please
The free-fall acceleration on Mars is 3.7 m/s2. (a) What length pendulum has a period of 4 s on the earth? cm What length pendulum would have a 4 s period on Mars? cm (b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended from this spring ...
December 6, 2010 by Anonymous

Chemistry*
Oh sorry I forgot the arrows! Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is given below. Fe2O3(s) + 2 Al(s) -->2 Fe(l) + Al2O3(s) What masses of iron(III) oxide ...
April 25, 2010 by Anonymous

physics
A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.845 m/s encounters a rough horizontal surface of length scripted l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant ...
June 3, 2013 by Melissa

physics
A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a horizontal force with magnitude 44.0 N to the box and produces an acceleration of magnitude 2.80 m/s^{2}, what is the mass of the box?
February 2, 2011 by mely

physics
A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a horizontal force with magnitude 44.0 N to the box and produces an acceleration of magnitude 2.80 m/s^{2}, what is the mass of the box?
February 2, 2011 by andrea

AP Physics B
A penny of mass 3.1g rests on a small 28.2g block supported by a spinning disk of radius 12cm. The coefficients of friction between the block and disk are .73 (static) and .64 (kinetic) while those for the penny and black are .6 (static) and .45 (kinetic). What is the maximum ...
November 9, 2012 by Daisy

Physics
A high diver of mass 68.2 kg jumps off a board 10.4 m above the water. The acceleration of gravity is 9.8 m/s2 . If his downward motion is stopped 3.58 s after he enters the water, what average upward force did the water exert on him? I already calculated that his velocity ...
December 5, 2012 by Khan

physics
A box,is resting on a smooth(frictionless)table.The mass of the box is 10 kg. (a)Determine the weight of the box and the normal force acting on(b)If the box is pushed down with a force of 40 Newton determine the normal force(c) If the box was pulled up with a force of 40 ...
July 22, 2008 by Jodie

Physics Problem
Paleontologists estimate that if a Tyrannosaurus rex were to trip and fall, it would have experienced a force of approximately 260,000 N acting on its torso when it hit the ground. Question 1 Assuming the torso has a mass of 3800 kg , find the magnitude of the torso's upward ...
September 23, 2009 by Cayla

physics
Let the mass of the block be 7.7 kg and the angle č be 25°. Find (a) the tension in the cord and (b) the normal force acting on the block. (c) If the cord is cut, find the magnitude of the block's acceleration.
October 9, 2010 by daisy

Physics
During a head on car crash, the car is designed to slow down as its front end crumples. If a person can survive an acceleration of -33 m/s how far must the front end crumple if the car was initially traveling at 28 m/s?
June 17, 2013 by Alison

PHYSICS CIRCULAR MOTION GRAVITATIONAL CONSTANT
Three masses are arranged in an (x, y) plane. 7 kg (-3,1) 8 kg (0,0) 9 kg (1,2) a) What is the magnitude of the resulting force on the 8 kg mass at the origin? The universal gravitational constant is 6.6726 × 10^−11 N · m^2/kg^2. Answer in units of N. b) What is the ...
November 14, 2010 by Jaylee

physics
A 800kg , light-weight helicopter ascends from the ground with an acceleration of 3.00m/s2 . Part A Over a 6.50s interval, what is the work done by the lifting force? Part B What is the work done by the gravitational force? Part C What is the work done by the net force on the ...
October 17, 2013 by Lidia

Physics
A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of the loop. (Note that ...
October 28, 2009 by Gina

Physics
A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of the loop. (Note that ...
October 29, 2009 by Rachel

math
Make up a set of at least 12 numbers that have the following landmarks. Maximum: 8 Range: 6 Mode: 6 Median: 5
October 6, 2008 by michelle

Math
Maximum: 57 Minimum: 50 Median: 54 Mode: 56 Give 12 sets of numbers using the above senarios?? Please Help!!
February 3, 2009 by James

math 115
Determine the maximum and minimum values of the following set of numbers. 3, -36/7, -1, -2/3,5/4,-5,26/9 I think the correct answer is 26/9 and -36/7
November 1, 2009 by Jen

Physics
To suck water up a straw to a maximum height of 98 mm, what minimum gauge pressure must be produced in the lungs?
November 25, 2009 by Kim

math
Make up a set of 7 numbers having the following landmarks: mode:21 median:24 maximum:35 range:20 I do not understand.
January 26, 2010 by Jade

math
make up a set of at least 12 numbers using the following landmarks: minimum 3 maximum 9 median 7 mode 7
January 27, 2010 by Hannah

math
Make up a set of atleast twelve numbers that has the following landmarks. Minimum: 50 Maximum: 57 Median: 54 Mode: 56?
February 1, 2010 by Madeleine

math
if i have 2 get the minimum and maximum tariffs required based on metersqured wat will be the needed facts should.
June 2, 2010 by dories

calculus
Let g(x)=|cos x-1|. The maximum value attained by g on the closed interval [0, 2pi] is for x equal to A) -1 B) 0 C) pi/2 D) 2 E) pi I think its pi/2 but I'm not sure at all.
June 12, 2010 by =)

Math
Make up a set of at least 12 numbers that have the following landmarks maximum 18 range 13 mode 7 and median 12
October 18, 2010 by Kiki

Algebra 2
If you have 64 feet of fencing available to create a rectangular pen for livestock, what is the maximum area you can enclose?
March 21, 2011 by Caeley

Physic
If it takes a particle in SHM 0.20 s to travel from the equilibrium position to the maximum displacement (amplitude), what is the period of oscillation?
May 7, 2011 by Amy

Physics
If it takes a particle in SHM 0.20 s to travel from the equilibrium position to the maximum displacement (amplitude), what is the period of oscillation?
May 7, 2011 by Amy

physics
If I threw a ball vertically at an initial speed of 34.5 m/s, how many seconds would it take to reach its maximum height?
September 27, 2011 by Anonymous

algebra
Please I need help: Find the vertex, the line of symmerty and the maximum or minmum value of the quadratic function: f(x)= 2x^2+2x+3
November 11, 2011 by jane

math
make up a set of at least twelve numbers that has the following landmarks. minimum:50 median:54 maximum:57 mode:56
December 2, 2011 by jimmy

Calculus Grade 12 University
Determine the critical numbers and find the absolute maximum and minimum values of the function y = 8x^3 + x^4 for x e [-8,2]
March 23, 2012 by Julie

Physics
What is the upper tripper point (UTP) of a comparator with hysteresis if R1 = 47 kŮ, R2 = 68 kŮ and the maximum positive output voltage is 10V?
April 4, 2012 by Robbie

Engineering
What is the upper tripper point (UTP) of a comparator with hysteresis if R1 = 47 kŮ, R2 = 68 kŮ and the maximum positive output voltage is 10V?
April 9, 2012 by Robbie

math
wheels are 1.25 inches in diameter and the fastest speed is 3ft/second maximum distance to travel is 16 x (18cm)
July 19, 2012 by Pat

calculus!
Use differentials to approximate the maximum error propagated when calculating the volume of a sphere, if the radius is 5 + or - .01 meters
October 20, 2012 by Cassie

Adv calculus
1. What is the maximum integer n such that 3^n is a factor of the product of all the odd inegers between 1 and 200?
December 19, 2012 by Taylor

Maths
Find The altitude of a right circular cone of maximum curved surface which can be inscribed in a sphere of radius 'r'.
January 22, 2013 by Sam

Math- Calculus
find the dimensions of a rectangle of maximum size that will fit into a half circle of radius 30 cm.
March 24, 2013 by John

helllllp MATHS
x and y are positive values satisfying x+y=1/4 . When ln(y^2+4xy+7) attains its maximum(subject to the given constraint), what is the value of 1/xy ?
May 14, 2013 by Anubhav

Pages: <<Prev | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | Next>>

Members