Saturday

December 20, 2014

December 20, 2014

Number of results: 37,402

**physics**

The drawing shows a top view of a square box lying on a frictionless floor. Three forces, which are drawn to scale, act on the box. Consider an angular acceleration with respect to an axis through the center of the box (perpendicular to the screen). Which one of the following ...
*April 26, 2014 by shamma*

**physics**

A box of mass 10kg starts from rest and slide down a plane angled at 45 degrees to the horizontal. the box slides 2m down the plane before it encounters a spring with constant k=500 N/m which causes it to come to rest. What will the maximum compression of the spring be: a) ...
*October 31, 2010 by manu*

**physics**

A box of mass 10kg starts from rest and slide down a plane angled at 45 degrees to the horizontal. the box slides 2m down the plane before it encounters a spring with constant k=500 N/m which causes it to come to rest. What will the maximum compression of the spring be: a) ...
*October 31, 2010 by amy*

**physics**

You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 17 m/s2. After 20 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect any effects due to ...
*August 9, 2014 by Danielle*

**Sensor Networks**

1)Consider the uniform wireless sensor network topology shown in the picture. Assume the network covers a much larger area than the part shown, extending endlessly for purposes of a middle-sensor such as sensor A. Hexagonal coverage is provided with sensing range r= √3 ...
*March 9, 2014 by EE*

**chemistry**

what is the maximum number of grams of PH3 that can be formed when 6.2grams of phosphorus reacts with 4.0 grams of hydrogen to form PH3? P4+6H2--> 4PH3
*June 9, 2008 by afdsfd*

**chemistry**

what is the maximum amoutn of KCL that can dissolve in 200 gram of water? ( solubility of KCL is 34 grams/100 gram H2O at 20 celsius
*June 10, 2008 by Miley*

**Calculus **

The power, in amps, transmitted by a belt drive from a motor is given by the function P(v)= 100v - 3/16 v^3 . For what value of v is the power at a maximum value? Thanks in advance!
*June 17, 2010 by Anonymous*

**Calculus**

estimate the absolute maximum and minimum values of f if any, on the stated interval, and then use calculus methods to find the exact values: f(x)=10ln(x^2+1)-8x; [0,3]
*July 31, 2010 by Mely*

**bio 100**

2. Photosynthetic saturation is the maximum rate of photosynthesis. What value of light intensity produced photosynthetic saturation in corn leaves?
*August 2, 2010 by Anonymous*

**5th Grade Math**

Find the missing numbers and landmarks for the set of numbers: 18,20,20,24,27,27,__,30,33,34,36,36,__ A range:22 B mode:27 C Minimum ____ D Maximum ____
*August 31, 2010 by Tiana*

**physics**

A .4 kg ball is attached to a spring with spring constant 12 N/m. If the ball is pulled down .2m from the equilibriu, and released, what is its maximum speed while it oscilates?
*September 16, 2010 by Willie*

**maths**

Can anyone help with te following please The total volume V(x)cm^3of a container is given by V(x)=4(x+x(8-x)) (<0x<8). Calculate the maximum possible volume of the container? regards Claire
*February 21, 2011 by Claire*

**Chemistry**

If you react 55g of hydrazine and 55g of oxygen gas, what is the maximum moles of nitrogen dioxide gas that can be made and what is the limiting reagent?
*March 1, 2011 by Melanie*

**Physics**

The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range
*September 22, 2011 by Whitney*

**Physics**

The projectile motion is fired with velocity of magnitude vo at the angle feta. Find feta for which the maximum elevation of the projectile is twice its range
*September 22, 2011 by Whitney*

**Physics HELP!!**

The wave is travelling to the right at 18.2m/s. What is the amplitude if the maximum displacement is 19.9cm and the total distance travelled by the wave is 41.2m? b) What is the wavelength of the wave? c).What is the frequency of the wave?
*November 24, 2012 by joane *

**Geometry**

Two of the heights of a triangle are 63 and 147 . Given that the third height is also an integer, what is the maximum possible value for the third height?
*March 7, 2013 by John*

**algebra**

(x,y,z)∈R3 are points that lie on the plane x+2y+3z=78, and lie on the sphere x^2+y^2+z^2=468. The maximum value of x has the form a/b, where a and b are coprime positive integers. What is the value of a+b?
*March 17, 2013 by Anonymous*

**science**

a ball is projected at an angel of 45 degree to the horizontal.if the horizontal range is 40m,the maximum height attained by the ball is- a)5m b)8m c)10m d012m
*May 22, 2013 by Mainak*

**algebra**

The height of a missile (h), in feet, is given by the equation h=8000t-16t^2, where t us time in seconds. What is the time it takes to reach the maximum height?
*October 3, 2013 by Juliann*

**physics**

a projectile thrown at an angle Ө with the horizontal has horizontal range R and maximum height h. show that the tangent of the angle of projection is given by 4h/R
*October 4, 2014 by swapnita paras*

**Calculus**

Let f(x) be a polynomial function such that f(-2)=5, f'(-2)=0, and f"(-2)=3. The point (-2,5) is a(n)____of the graph f. A. Relative maximum B. Relative minimum C. Intercept D. Point of Inflection E. None of these
*December 14, 2014 by Anonymous*

**science**

hey how u all doin? If a ball is thrown vertically upwards into the air. What is the main energy conversion that takes place as the ball rises towards its maximum height? thanks carl
*December 10, 2008 by carl*

**ECONOMICS**

What will Happen in this Senerio? If someone deposits $15,000.00 into a Bank and the required reserves is 15% what will be the total increase in checking account deposits in the banking system and what will be the maximum loans available to the public?
*November 28, 2009 by DERICK*

**Science**

If a radioactive isotope has half life of 5 days,how long will it take for its radioactive strength to be a maximum of one thousandth,(1/1000) of its original value? Can anyone give me a VERY SIMPLE explanation of this please? Thank you.
*January 29, 2011 by Korina*

**maths**

By first applying the Product Rule, choose the option that gives (correct to two decimal places) the overall maximum value of the function f(x) = e^3x cos(2x) on the interval [1/12 π, 1/4π]. Options A 0.49 B 1.90 C 2.19 D 2.42 E 3.97 F 5.88 G 7.46 H 10.55
*May 11, 2011 by albert*

**math**

a rectangular garden is to be fenced along four sides and in the middle it is to be divided into 2 equal areas.if 300meters of fencing materials is available, find the maximum possible area that can be fenced.
*December 2, 2011 by Anonymous*

**physics**

A diffraction grating is calibrated by using the 546.1 nm line of mercury vapor. The first-order maximum is found at an angle of 17.62 degrees. Calculate the number of lines per centimeter on this grating.
*April 12, 2012 by Victoria*

**physics**

a boy throws a stone straight upward with an initial speed of 15 m/s on the surface of the earth. what maximum height above the starting point will the stone reach before falling back down?
*September 8, 2012 by Anonymous*

**mba**

the price p per unit at which a company can sell all that it produces is given by the function p(x) = 300-4x. the costs function is c(x) = 500+28x where x is the number of units produced. find x so that the profit is maximum
*October 22, 2012 by viji*

**Mechanics_physics**

A soccer player kicked a ball at an angle of 37 degrees to the horizontal.if the range covered by the ball is 240.3m; calculate (a) The initial velocity of projection ? (b) The time of flight (c) The maximum height attained
*January 4, 2013 by Precious*

**physics**

A package slides down a 135 m long ramp with no friction. If the package starts from rest at the top and is to have a speed no faster than 19m/s at the bottom, what should be the maximum angle of inclination?
*March 1, 2013 by Anonymous*

**college algebra**

Find the local maximum and minimum values of the function and the value of x at which each occurs. State each answer correct to two decimal places. (If an answer does not exist, enter DNE.) U(x)=x√(5-x)
*April 3, 2013 by kadijah*

**physics**

a player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 28 m/s. what is the maximum height attained by the ball? Round the answer to the nearest tenth of a meter.
*April 9, 2013 by faith*

**College Physics**

The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.
*April 25, 2013 by Valerie*

**physics**

a 4kg roller is attached to a spring of force constant 100N/m. it slides over a frictionless horizontal road. the roller is displaced from equilibrium position by 10cm and then released. its maximum speed will be?
*May 11, 2013 by sumit*

**MATH hard problem...HELLPPPPPP**

Let S={1,2,3,11} and T1,T2,TN be distinct subsets of S such that |Ti∩Tj|≤2 for all values i≠j. What is the maximum possible value of N? clue: The empty set is a subset of every set. Thanks
*May 21, 2013 by Help please*

**ISBM**

The price P per unit at which a company can sell all that it produces is given by the function P(x) = 300 4x. The cost function is c(x) = 500 + 28x where x is the number of units produced. Find x so that the profit is maximum.
*July 20, 2013 by Nitish*

**math**

A cannonball is fired across a field. Its height above the ground after t seconds is given by -16t^2+104. How long does it take for the ball to reach its maximum height of 169 feet?
*October 2, 2013 by manda*

**Calculus PLEASE HELP**

Show that the maximum profit occurs when the marginal revenue equals the marginal cost. I'm pretty sure this is supposed to be some sort of proof, but I have no idea how to even start it...
*December 12, 2013 by Lindsay*

**Chemistry**

Based on the cell reaction: Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 55.0g of copper is plated out? Wmax=______ J
*April 14, 2014 by Rebecca*

**Pre-calculuc-check answer**

Which is true for the graph of f(x)= -x^3+3x-2? Answer: relative maximum at (1,0) 2) Determine between which consecutive integers one or more real zeros of f(x)= 3x^4+x^3-2x^2+4 are located. Answer: -1 and 0
*August 23, 2008 by Lucy*

**Math**

An indoor track is shaped like a rectangle with a semi-circle on each end. The distance around the track is 200 yards. Find the maximum area enclosed by the track.
*April 26, 2011 by Tj*

**physics **

during a journey over which speed varies, the maximum attained speed in comparison to the average speed is always: A)one half of it B) greater than it C)less than it D) equal to it E) none of this
*September 2, 2013 by jack*

**Physics**

A 11 kg box slides 4.2 m down a frictionless ramp and then collides with a spring whose spring constant is 250 N/m. What is the maximum compression of the spring? I got 1.35 m but it is incorrect. Any help would be great!
*March 19, 2014 by Mark*

**Geometry**

Ok Dr. Russ helped me find one part of the question, but I still can't figure out the values of x that maximizes volume = in. Any help is appreciated. Thanks On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced creases are made. The ...
*January 21, 2011 by Valerie*

**college physics**

an atwood machine is constructed by mounting a well-lubricated pulley (not necessarily a ring/disc), whose radius is 6.00cm on an axle and passing a rope over the pulley. Each end of the rope is attached to a different mass of 3.0 kg and 2.0kg so they both hang vertically. ...
*June 25, 2013 by kim*

**Math**

Bob wants to buy cards with $20. Each card cost between $1.80 and $2.25. What is the maximum number of cards he can buy?
*November 30, 2010 by Bill*

**Physics**

If you are pushing a box with 100 N of force and the maximum friction is 150 N. What is the net force of the box?
*February 2, 2011 by Jenny*

**Physics**

If you are pushing a box with 100 N of force and the maximum friction is 150 N. What is the net force of the box?
*February 3, 2011 by maritza*

**calculus**

6. Determine a, b, c, and d so that the graph of y=ax^3+bx^2+cx+d has a point of inflection at the origin and a relative maximum at the point (2, 4). Sketch the graph.
*January 3, 2012 by Yoona*

**physics**

What is the rms value of the electric field in a sinusoidal electromagnetic wave that has a maximum electric field of 64 V/m?
*March 4, 2012 by jazz*

**Physics**

The maximum current in an AC circuit is 3.0 Amperes. What is the rms value of the current in the AC circuit? 0.5 A 2.1 A 3.0 A 4.2 A I would think D...
*October 22, 2012 by I'm on anon*

**calculus**

a function has a local maximum at x=-2 and x=6 and a local minimum at x=1. how do u find the concavity of this function and point of inflection??
*November 11, 2012 by Navroz*

**Calculus**

Find a cubic function f(x) = ax^3 + bx^2 + cx + d that has a local maximum value of 3 at x = −2 and a local minimum value of 0 at x = 1.
*November 12, 2012 by Benjamin*

**Calculus**

Find the absolute maximum and the absolute minimum values of f(x)=x−7cos(x) on the interval [−,).
*July 7, 2013 by Robin*

**calculus**

Find the absolute maximum and absolute minimum values of f on the given interval. f(t) = (36 − t^2)^ 1/t, [−1, 6]
*November 3, 2013 by Anonymous*

**Science**

2 forces of 5N&7N respectively act on an object. (a) When will the resultant of 2 vectors be at a maximum? (b) When will the resultant of the 2 vectors be at a minimum?
*January 19, 2014 by Lesed*

**Calculus Help!**

Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = xe^(−x^(2)/98), [−6, 14]
*April 1, 2014 by Katir *

**maths**

What is the maximum number of cubes with a side of length 1/3 that can fit inside a cube with a side of length 1 ? 1.3 2.9 3.18 4.27
*August 11, 2014 by peter*

**math**

when you throw up a cricket ball foot ball tennis ball and a basket ball which will go to a maximum height
*September 13, 2014 by Anonymous*

**physics**

A block of mass M is sliding down an inclined plane and is accelerating. Which of the following statements are true? Choices: True, False. A. The frictional force must be less than the component of Mg down the plane B. The normal force of the plane is greater than the weight ...
*December 10, 2008 by Sandhya*

**physics**

A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are μs = 0.7 and μk = 0.59, respec- tively. The acceleration of gravity is 9.8 m/s2 What is the frictional force acting on the 29 kg mass? Answer in units of N (...
*November 10, 2013 by james*

**physics**

An elevator of mass M rises a distance H in time T and acquires potential energy PE. If it rises the same distance in half the time the increase in potential energy will be?
*June 29, 2010 by Anonymous*

**physics**

A block is at rest on the incline shown in the figure. The coefficients of static and ki- netic friction are μs = 0.45 and μk = 0.38, respectively. The acceleration of gravity is 9.8 m/s2 . What is the frictional force acting on the 25 kg mass? Answer in units of N ...
*October 1, 2013 by Anonymous*

**physics**

a truck of mass 8500Kg is pulling a trailer of mass 27 000Kg on a level road.The coefficient of kinetic friction is 0,20.A horizontal force of 75 000N moves the truck forward.question:calculate the magnitude of the acceleration of the system
*March 3, 2014 by Bheki*

**High School Physics**

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

**physics**

If the earth acceleration due to gravity on a mass of 2000kg on the earth surface is 10ms.What will be the acceleration due to gravity when it is at a point twice the radius of the earth.What is the gravitational force on it.
*August 12, 2011 by Boniface*

**Physics**

A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient of kinetic friction between the box and the table is .3 and the box slides at a constant speed of .5m/s what is the weight of the hanging mass? ...
*November 14, 2007 by Andrea*

**Physics with Calculus**

The system shown in the figure is in static equilibrium. The rod of length L and mass M is held in an unpright position. The top of the rod is tied to a fixed vertical surface by a string, and a force F is applied at the midpoint of the rod. The coefficient of static friction ...
*November 8, 2014 by Rico*

**Science**

Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Relative humidity is the amount of vapor the air is holding expressed as a percentage of the amount the air is capable of ...
*July 18, 2008 by Jimmy*

**precalc**

the graph of a cubic function has a local min at (5,-3) and a point of symmetry at (0,4). At what point does a local maximum occur? i don't quite know how to figure this one out, any help?
*February 11, 2008 by Kate*

**Chemistry *Urgent***

The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A Seriously can't an f orbital hold 14 electrons?
*November 18, 2008 by Trevor*

**Differential Calculus**

A ball thrown up has a height f(t)=250t-25t^2 after t seconds. (1) find the maximum height (2) find the velocity when it hits the ground.
*August 10, 2009 by matrix school 2*

**calc**

Let f be the function defined by f(x) = (x 2 + 1)e -x for -4 < x < 4. a. For what value of x does f reach its absolute maximum? Justify your answer. b. Find the x-coordinates of all points of inflection of f. Justify your answer.
*February 23, 2010 by john*

**physics**

consider a simple harmonic oscillation with m=0.5kg, k=10N/m and amplitude A=3cm.WHat is the total energy of the oscillation,what is the maximum speed,what is the kinetic energy?
*September 17, 2010 by kabelo*

**PHYSICS**

An athlete on a trampoline leaps straight up into the air with an initial speed of 9.3 m/s. Find the following: (b) the speed of the athlete when she is halfway up to her maximum height
*October 27, 2010 by Petrik*

**math**

A dog is tied to a leash that is hooked to the outside corner of a barn that measures 12 ft.x20 ft. The length of the leash is 16 ft. What is the maximum area in which the dog can wander?
*January 11, 2011 by Kortney*

**Science**

A ball is thrown vertically into the air and takes 5s to return to the thrower, from time of projection. What is the time it takes to reach maximum height ?
*January 31, 2011 by Christopher*

**Physics**

A grasshopper jumps 1.0 m from rest, with an initial velocity at a 47 angle with respect to the horizontal. Find the speed of the grasshopper? Find the maximum height reached?
*February 24, 2011 by Lady22*

**physics**

A 2.9 kg object oscillates with simple harmonic motion on a spring of force constant 430.0 N/m. The maximum speed is 0.8 m/s. What is the total energy of the object and the spring?
*October 12, 2011 by Jay*

**Physics**

A charge of 6.0 mC is to be split into two parts that are then separated by 3.00 mm. What is the maximum possible magnitude of the electrostatic force between those two parts?
*February 2, 2012 by Aliyah*

**physics**

A golfer drives a ball with a velocity of 42 m/s at an angle of 45 degrees above the horizontal. What is the maximum height (in meters) of the ball above the level fairway?
*February 14, 2012 by j*

**Physics**

A spring and block is set up on frictionless tabletop. The 30N/m spring is compressed 16 centimeters and released. What is the maximum speed the 2.0 kilogram block will reach?
*March 11, 2012 by Tracy*

**Physics**

A spring and block is set up on frictionless tabletop. The 30N/m spring is compressed 16 centimeters and released. What is the maximum speed the 2.0 kilogram block will reach?
*March 12, 2012 by Tracy*

**math**

The total hang time T in seconds, is given by T(h)=^h/2. Where h is the maximum height. If a person jumps 6 ft off the ground, determine for how many seconds the person is in the air.
*April 19, 2012 by angel*

**calculus**

Suppose f'(x) = xe^-x^2. a) On what interval is f increasing? On what interval is f decreasing? b) Does f have a maximum value? Minimum value? So should I assume that f'(x) > 0 since e has to be a positive number?
*September 22, 2012 by Travis*

**physics**

Bob can throw a 540 g rock with a speed of 26 m/s. He moves his hand forward 0.8 m while doing so. What is Bob's maximum power output as he throws the rock?
*November 25, 2012 by meg*

**physics**

Bob can throw a 540 g rock with a speed of 26 m/s. He moves his hand forward 0.8 m while doing so. What is Bob's maximum power output as he throws the rock?
*November 25, 2012 by meg*

**Physics**

A wave described by y(x,t)=Asin(kx-wt) moves down a string. What is the maximum transverse speed an atom of the string can have? What is the displacement of this atom at this time?
*January 18, 2013 by Sean*

**calculus-max & min**

an open box with a square base is to be constructed from 48 square inches of material. What dimensions will produce a box with maximum volume?
*January 31, 2013 by Pat*

**chemistry**

the maximum volume if Ziploc sandwich is 0.5 L at the pressure of 1 atm. use the gas law, calculate the pressure in the bag from the above volume of co2.
*March 10, 2013 by mariah*

**math**

Two non-negative numbers are chosen such that their sum is 30. Find the numbers if the sum of their squares is to be a maximum. Explanation to solve this would help !
*April 10, 2013 by David*

**Trigonometry**

What is the maximum integer value of x, where x<200, that satisfies the following inequalities: sin(90+180x/100)<0 and tan(180−180x/100)<0 ?
*May 23, 2013 by Tony *

**Discrete Mathematics**

Use Bubble Sort to sort the list: 7, 12, 5, 22, 13, 32 What is the maximum number of comparisons required for a list of 6 numbers? How many vcomparisons did I actually need?
*July 26, 2013 by Joy*

**physics**

The position of a particle moving along the x axis is given by x=3.0t^2 - 1.0t^3 , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction
*November 14, 2013 by olivia*

**math**

Suppose p(x) is a twice-differentiable function such that p(1) = 3, p'(1) = 0, and p(1) = -2. Which of the following is true? there is a relative maximum at p(1) = 3 there is a relative minimum at p(1) = 3 there is a point of inflection at p(1) = 3 none of these are true
*March 11, 2014 by lilly*

**Physics**

A 0.2kg ball is attached to a rope and is whirled in a horizontal circle. Calculate the maximum speed of the ball if the length of the rope is 0.8m and its breaking strength is 0.9N
*June 14, 2014 by alice*

**physics**

A stone is projected up with a vertical velocity u, reaches upto a maximum height h. When it is at a height of 3h/4 from the ground, the ratio of KE and PE at that point is: (consider PE=0 at the point of projection) a]1:1 b]1:2 c]1:3 d]3:1
*June 27, 2014 by fatimah*

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