Wednesday

November 25, 2015
Number of results: 71,301

**math**

A college is planning to construct a retangular parking lot on land bordered on one side by a highway. The plan is to use 680 feet of fencing to fence off the other three sides. What dimensions should the lot have if the enclosed area is to be a maximum?
*April 26, 2015 by ddot*

**Physics **

A horizontal force, F1 = 85 N, and a force, F2 = 18.4 N acting at an angle of θ to the horizontal, are applied to a block of mass m = 2.1 kg. The coefficient of kinetic friction between the block and the surface is μk = 0.2. The block is moving to the right. A. Solve...
*October 9, 2014 by Harry*

**physics**

a hydraulic lift is designed for a gain of 100, so that a 10 N force applied at theinput piston will produce a force of 1,000 N at the output piston. If the radius of the input piston is 2 cm, the radius of the output is a) 200 cm, b) .02 cm c) 400 d) 20 e) .05
*January 8, 2012 by anna*

**annie**

You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You estimate that a transmission wire is about 11m above the ground. The local power company tells you that the line operates at 13kV and provide a maximum of 86MW to the local area. ...
*December 14, 2009 by physics help*

**Minima Maxima **

Find and classify the relative maxima and minima of f(x) if f(x)= defint a=0 b=x function= t^2-4/(1+cos(t)^2) dt x^2-4/(1+cos(x)^2)= 0 x^2-4=0 x^2=4 x= +/- 2 So I got relative maximum as -2 and 2. And relative minimum as zero. However, when I graph it on Wolfram, it gives me ...
*May 18, 2013 by Eric*

**finance**

Winnebagel Corp. currently sells 29,400 motor homes per year at $44,100 each, and 11,760 luxury motor coaches per year at $83,300 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 20,580 of these campers per year at $11,...
*April 16, 2012 by angiza*

**active physics**

from the question we just did, how much force is neede to stop in 20 seconds! OK. think it through. If it's going at 10 m/s, and then it stops, what is it's change in velocity? is it 10 Yes, now it takes 20 seconds, so what is its acceleration (actually deceleration)? can u ...
*November 2, 2006 by alejandra*

**Physics**

Read the activity 2-1:Force and Pressure in the lab manual (pages 167-168). As described in the manual, consider a 10 cc syringe is connected to a 50 cc syringe. Information of the syringes are as follows: (mass of 10 cc piston) = 16 g (mass of 50 cc piston) = 60.6 g (diameter...
*November 12, 2009 by Ellie*

**help please:)**

How many supporting details should you develop to back up your thesis? A.Four B.Five C.Three D.As many as you want. i got C what do you think?
*September 28, 2011 by ciara*

**Physics**

Block B has a mass of 4.2 kg and block A has a mass of 2.6 kg. They are in contact and slide over a frictionless horizontal surface. A force of 11 N acts on B.(force applied on block b then block a , they are beside each other) what is the force on B due to A if the blocks are...
*October 6, 2014 by Sabrina*

**Physics**

In a supermarket parking lot, an employee is pushing ten empty shopping carts, lined up in a straight line. The acceleration of the carts is 0.080 m/s2. The ground is level, and each cart has a mass of 25 kg. (a) What is the net force acting on any one of the carts? N (b) ...
*September 17, 2007 by NHS*

**physics**

hi i have a physics question i dont understand here is the question A sample of blood is placed in a centrifuge of radius 15 cm. the mass of the corpuscle is 3.0*10^-16 kg, and the magnitude of the force required to make it settle out of the plasma is 4.0X10^-11 N. At how many...
*January 2, 2007 by becky*

**Algebra2**

Complete parts a – c for each quadratic function. a. Find the y-intercept, the equation of the axis of symmetry and the x-coordinate of the vertex. b. Make a table of values that includes the vertex. c. Use this information to graph the function. 1. f(x) = 2x2 2. f(x) = x2 + 4...
*February 8, 2008 by Mara*

**College Physics**

Consider a rock thrown off a bridge of height 78.5 m at an angle č = 25° with respect to the horizontal as shown in Figure P4.20. The initial speed of the rock is 15.6 m/s. Find the following quantities: (a) the maximum height reached by the rock (b) the time it takes the rock...
*September 12, 2011 by HELP*

**Physics**

A skier of mass 59.5 kg comes down a slope of constant angle 1◦ with the horizontal. The acceleration of gravity is 9.8 m/s^2 i. What is the force on the skier parallel to the slope? Answer in units of N. ii. What force normal to the slope is exerted by the skis? Answer ...
*February 21, 2014 by mallak*

**Physics**

Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 3.21 kg mass has fallen through 0.4 m, its downward speed is 1.27 m/s. The acceleration of gravity is 9.8 m/s2 . 3.21 kg (box hanging from table) 4.96 kg (box...
*February 20, 2011 by CR*

**MATH ANALYSIS**

How should this be done? Suppose you have 132 m of fencing with which to make two side-by-side rectangular enclosures against an existing wall. if the rectangular enclosures are adjacent and of the same depth what is the maximum are that can be enclosed?
*December 9, 2009 by anonymous*

**MATH ANALYSIS**

How should this be done? Suppose you have 132 m of fencing with which to make two side-by-side rectangular enclosures against an existing wall. if the rectangular enclosures are adjacent and of the same depth what is the maximum are that can be enclosed?
*December 9, 2009 by anonymous*

**physics**

In the absence of air resistance two balls are thrown upward from the same launch point. Ball A rises to a maximum height above the launch point that is four times greater than that of ball B. The launch speed of ball A is _______ times greater than that of ball B. a)2 b)4 c)8...
*September 8, 2010 by Brantley*

**physical science**

a force of 20 N gives an object an acceleration of 5 m/s2. (a)What force would be needed to give the same object an acceleration of 1 m/s2. (b) what force would be needed to give an accelerattion of 10 m/s2 ?
*September 14, 2012 by tracey*

**physics**

motor A lift a steel bar 5000N upward at a constant 2m/s. motor B lift 4000N steel bar upward at a constant 3m/s. which motor is supplying more power?
*February 26, 2013 by Anonymous*

**physics**

A force is applied to an initially stationary block of mass 1.75 kg that sits on a horizontal floor as shown. The 53.5 N force is applied at θ = 32° angle. The coefficients of friction between the floor and the block are μs = 0.593 and μk = 0.343. What is the ...
*October 7, 2014 by Anonymous*

**Physics**

A chair with a mass of 21 kg is accelerated by a steady net force with a magnitude of 160 N. What is the magnitude of its acceleration?
*March 4, 2011 by Anonymous*

**7th science**

acceleration=force divide by mass . How do you solve 20m/s2 =unknown divide by 0.15kg
*January 21, 2012 by marie*

**physics**

(a) What is the acceleration of a car in m/s˛ that doubles its speed from 36.0 km/h in 5.00 s? (b) What net force acted on this car if its mass was 1,000.0 kg?
*January 22, 2012 by sarah*

**Physical Science**

Bill hit a ball with an acceleration of 40 ms2.The mass of the ball is 0.5kg. What is the force?
*December 11, 2012 by Casey*

**Physics**

Sled accelerates at 2m/s^2. If net force is tripled and mass is doubled then what is the new acceleration of the sled?
*June 16, 2014 by Siobhan*

**Physics**

A constant force of 800n acts on an object of mass 40kg what is the acceleration placed on the object
*September 5, 2015 by Tosin*

**Physics **

Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration: a= dv/dt = g - kv, where k is a constant. (a) Derive a formula for the velocity of the body as a function of time assuming it starts from rest (v=0 at t=0). [...
*September 26, 2013 by Rose*

**science**

An object with a mass of 11.4 kg experiences a force of 13.68 N. What is the acceleration of the object?
*January 14, 2013 by Anonymous*

**Practice Exam Calculus **

The radius of a sphere was measured to be 20cm with a a possible error of 1/5cm 1).Use linear approximation to estimate the maximum error in the calculated surface area. Leave your answer in terms of pi. 2).Use linear approximation to estimate the maximum error in the ...
*October 15, 2013 by Molly*

**Physical Science**

The static frictional between a 500 kilogram box of bricks and the floor is 500 Newton’s. The kinetic frictional force in only 220 Newton’s. How many Newton’s of force must a worker exert to get the moving?
*September 26, 2012 by Tala*

**physics**

A comet orbits the Sun with a period of 71.8 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.50 AU from the Sun at perihelion, what is its maximum distance from ...
*July 5, 2012 by lanre*

**Physics-momentum/impluse**

hi well i have two questions i dont understand how to solve and all. 1) The front of a 1400-kg car is designed to absorb the shock of a collision by having a "crumple zone" in which the front of 1.2m of the car collapses in absorbing the shock of a collision. if a car ...
*December 6, 2006 by becky*

**Physics**

A coach with a mass of 100 kg is placed on an adjustable ramp attached to a truck. As one end raises, the couch begins to move downward. If it sldes with an acceleration of .79 m/s^2 at 12 degrees, what is the coefficient of kinetic friction. I think I found the normal force, ...
*January 20, 2011 by ash*

**Chemistry**

If each balloon is filled with carbon dioxide at 20 deg. C and 1 atmosphere, calculate the mass and the number of moles of carbon dioxide in each balloon at maximum inflation.
*January 26, 2014 by Gary*

**Sciece (chemistry)**

Sodium Chloride NaCl can be made by the reaction of sodium with chlorine. Balanced equation: 2Na(s)+Cl2(g)=2NaCl(s) Calculate the maximum mass of sodium chloride which could be obtained from 92g of soium?
*September 25, 2007 by Ben*

**physics**

You drop a ball, mass 127.5 grams from a height of 83.0 cm. It bounces back to a height of 50.5 from the floor. What is the change in gravitational potential energy from the moment it is dropped, to the moment it reaches the maximum height from the bounce?
*May 25, 2014 by wes*

**science**

a man throws a ball of mass 0.5kg vertically upwards with a velocity of 25 m/s.find:[a}the initial momentum of the ball{b}momentum of the ball at the half way mark of the maximum height {given g=10 m/s square}
*September 7, 2014 by mansi*

**Physics**

A 984 kg car is driving along a boardwalk. The car's center of mass is 33 cm in front of the rear wheels, and the distance between the front and rear wheels is 2 m. What total force does the car's front tires exert on the boardwalk? Give your answer in Newtons.
*April 24, 2011 by paige*

**Physics**

A 965 kg car is driving along a boardwalk. The car's center of mass is 45 cm in front of the rear wheels, and the distance between the front and rear wheels is 2 m. What total force does the car's front tires exert on the boardwalk? Give your answer in Newtons.
*April 27, 2011 by Anonymous*

**Physics**

A ball is thrown straight upward and returns to the thrower’s hand after 2.3 s in the air. A second ball is thrown at an angle of 60◦ with the horizontal. At what speed must the second ball be thrown so that it reaches the same maximum height as the first? The ...
*December 27, 2014 by Lauren*

**physics-major help!**

the object hung from the cable has a weight of 25 N. write the equation for the sum of the forces in the y-direction. what is the tension i nthe cable? has a 30 degree angle. how do i do this pleasee help i don't understand at all!
*January 11, 2009 by Kennedy*

**physics**

Consider the 57 N weight held by two cables shown below. The left-hand cable is horizon- tal. 57 N 52 a) What is the tension in the cable slanted at an angle of 52? Answer in units of N
*November 6, 2012 by scott*

**college physics**

a 3m long light board with negligible weight is supported at each end by cables. a painter weighing 900 N stands 1m from the left cable. find the tension in each cable,
*February 21, 2015 by Anonymous*

**College Physics**

A 3.0 m long light board with negligible weight is supported at each end by cables. a painter weighing 900 N stands 1.o m from the left cable. Find the tension in each cable.
*February 21, 2015 by Anonymous*

**Physics**

An air puck of mass 0.23 kg is tied to a string and allowed to revolve in a circle of radius 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of 0.9 kg is tied to it. The suspended mass remains ...
*November 13, 2012 by Greg*

**anatomy**

do you think there is a difference in the absolute force generated by males and females? I think the answer is yes just by the common knowledge that males are typically stronger than women. But, I'm not sure how to scientifically explain why a man's muscles are able to exert ...
*September 27, 2012 by anon*

**English**

How might an instruction manual designed for troubleshooting differ from an instruction booklet designed for improving performance in a skill?
*April 8, 2013 by Kel Marie*

**Physics**

A uniform solid cylinder of mass M and radius R is at rest on a slab of mass m, which in turn rests on a horizontal, frictionless table. If a horizontal force is applied to the slab, it accelerates and the cylinder rolls without slipping. Find the acceleration of the slab in ...
*October 8, 2012 by Amjad*

**physics**

A ball of mass 1.04 kg at the end of a 0.52 m long string is swung in a vertical circle at the fastest constant speed the ball can have without the string breaking. If the string can only exert 33 N of force without breaking, a) What is the speed of the ball?
*January 20, 2012 by Anonymous*

**physics**

a motor turns 21.6 revolutions in 0.75 second. what is the angular speed of the motor in rpm? in radians per second?
*December 9, 2010 by joshua*

**Materials Science**

At a point in a plate subjected to plane stress loading along its surface, the cartesian stress components acting on the x-face of an element oriented along the (x,y) frame are σx=40MPa and τxy=70MPa, The maximum allowable shear stress, to prevent yielding of the ...
*October 10, 2014 by qwerty*

**Physics Class**

A 965 kg car is driving along a boardwalk. The car's center of mass is 45 cm in front of the rear wheels, and the distance between the front and rear wheels is 2 m. What total force does the car's front tires exert on the boardwalk? Give your answer in Newtons.
*April 28, 2011 by Paige*

**physics**

A 4.0 kg block is put on top of a 5.0 kg block. To cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 16 N must be applied to the top block. The assembly of blocks is now placed on a horizontal, frictionless table...
*November 20, 2011 by Sadi*

**Physics **

A 5 kg block is hanging from the top of an elevator if the elevator is accelerating upward at a rate of 3m/s/s, what is the tension in the rope that the block is hanging from?
*November 24, 2013 by Karen *

**To DAMON.. (RE: Phys question u solved yesterday)**

YOU DID The tension in the string is the force exerted down by the falling disk and up by whatever is holding the disk. They are equal and opposite. If the disk is a yo-yo, that force is exerted by your finger on the string to give the tension. Force up on disk = T Force down ...
*December 16, 2008 by Stacu*

**Physics**

Can you please show me how these answers are reached. A fully loaded Cessna-182 airplane of mass 1290 kg has an engine failure when flying with an airspeed of 139 km/h at an altitude of 2670m on a calm day. It then glides at a constant glide angle (which is the direction of ...
*March 11, 2011 by Kelly*

**Chemistry**

FeCl3(aq) + K2S(aq) Fe2S3(aq) + KCl(aq) Consider the unbalanced equation above. What is the maximum mass of Fe2S3 that can be produced when 54.5 mL of 0.480 M FeCl3 and 98.5 mL of 0.420 M K2S react?
*October 7, 2013 by Connor*

**physics**

A 100 kg mass starts from rest at the top of an incline plane that makes an angle of 35 degrees with the horizontal. There is a coefficient of friction of 0.005 between the ramp and the mass. The mass slides down the ramp and then slides to a stop on a surface that the ...
*May 14, 2010 by Steven*

**Physics 1**

6. –/1.5 points CJ8 4.P.014. My Notes | . Question Part Points Submissions Used 1 2 –/1 –/0.5 0/7 0/1 Total –/1.5 When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down...
*October 3, 2012 by Donald*

**physics**

A cylindrical aluminum rod is attached to a wall by a hinge. A copper cable is attached to the rod at a point three-quarters of its length away from the wall and used to support the rod in a horizontal position. The diameter of the rod is 5.0 cm and its unstressed length is 4....
*April 3, 2012 by anonymous*

**Physics - Mechanics**

A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the block (In terms of M, m ...
*March 13, 2015 by Anonymous*

**Physics - Mechanics**

A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the block (In terms of M, m ...
*March 14, 2015 by Anonymous*

**Physics**

A block of mass m1 = 4.90 kg sits on top of a second block of mass m2 = 14.5 kg, which in turn is on a horizontal table. The coefficients of friction between the two blocks are µs = 0.300 and µk = 0.100. The coefficients of friction between the lower block and the rough table ...
*November 16, 2013 by Tom*

**Physics**

A 2.0 kg particle is moving along the x axis to the left with a velocity of v= -6.0 m/s. Suddenly, between times t =0 and t = 4.0 x a net force = 3t^2 – 12t is applied to the particle, where F is in N and t is in s. Calculate the velocity of the particle at t=4.0 s. Is this ...
*November 24, 2009 by Julia *

**Physics**

Someone attaches a 27 kg bale of hay to one end of a rope passing over a frictionless pulley connected to a beam in a hay barn. Someone else pull down on the opposite en of the rope with a force of 397 N. Ignoring the mass of the rope, what will be the magnitude and directionf...
*January 20, 2011 by ash*

**physics**

The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save
*February 10, 2013 by nicole pierre*

**physics**

The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save
*February 10, 2013 by nicole pierre*

**physical**

A dog is pulled at an angle of 30 degrees with the horizon using a tension of 450N. If the sled has a mass of 50kg, then find the recoil, forward force and acceleration (if any)?
*October 23, 2012 by Gee*

**physics HELP**

A block a mass of .113 kg is slid horizontally with a acceleration of 2.612 m/s^2 What is the kinectic force and the coefficient of friction. Please show the steps in getting these answers,
*November 5, 2012 by anthony*

**science**

An astronaut of mass 120 kg recedes from her spacecraft by activating a small propulsion unit attached to her back. The force generated by a spurt is 30 N. Show that her acceleration is 0.25 m/s2.
*September 15, 2013 by angie*

**Physics**

An astronaut of mass 120 kg recedes from her spacecraft by activating a small propulsion unit attached to her back. The force generated by a spurt is 30 N. Show that her acceleration is 0.25 m/s2.
*September 15, 2013 by Deidre*

**Physics Please help !!**

A single conservative force = (6.0x - 12) N where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 23 J at x = 0. (a) Write an expression for U as a function of x, with U in joules and x in ...
*October 23, 2012 by member of physics*

**scientist**

suppose a polar bear running with an initial speed of 4.0 m/s accelerates uniformly for 18s. what is the bear's maximum speed if the bear travels 135m during the 18s of acceleration? Give the answer in both meters per second and kilometers per hour.
*September 16, 2009 by NoNo100*

**Physics**

In this problem, your task is to analyze a lead balloon. The balloon in question is a hollow sphere of diameter of 20.0 m, constructed from a lead foil 0.25 mm thick and filled with helium gas. Below the balloon, a passenger basket is suspended. The mass of the passenger ...
*June 15, 2012 by Rob*

**Physics**

Two electrons exert a force of repulsion of 0.96 N on each other. How far apart are they? The elemental charge is 1.602 × 10 −19 C .
*February 17, 2012 by Jenny*

**physical**

the ability to exert muscle force quickly is known as 1) agility 2) power 3) recation time 4) speed I need help! Plz anyone!
*December 18, 2013 by someone*

**English**

A good scientist must have a keen mind an unqhenchable curiousity and a (groundless disinterested) desire to discover the truth disinterested? Ms.Sue you told me it should be maximum but groundless and disinterested are the only options. So is my answer still correct?
*September 18, 2012 by Jerald*

**physics**

A long uniform rod of length 4.76 m and mass 5.48 kg is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position as in the figure. (A) At the instant the rod is horizontal, find its angular speed. The acceleration of ...
*October 31, 2008 by Molly86*

**physics**

A long uniform rod of length 4.76 m and mass 5.48 kg is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position as in the figure. (A) At the instant the rod is horizontal, find its angular speed. The acceleration of ...
*November 2, 2008 by Anonymous*

**Physics **

An electron is accelerated through 2300 V from rest and then enters a uniform 1.90 T magnetic field. (a) What is the maximum value of the magnetic force this charge can experience? (b) What is the minimum value this charge can experience?
*March 30, 2013 by Tamara *

**physics**

You are planning to build a log cabin in northern Minnesota. You will pull the logs up a long, smooth hill to the building site by means of a rope attached to a winch. You need to buy a rope for this purpose, so you need to know how strong the rope must be. Stronger ropes cost...
*September 27, 2012 by nate*

**physics**

if I weigh 177 lb on a stationary scale and stand on that same scale inside an elevator going up at an acceleration of 12 ft/s^2 what will the ending scale reading be?
*February 24, 2014 by jake*

**Physics**

At a point P, the electric field is 78 N/C at 51° counter-clockwise from the positive x axis. A particle of mass 4.7 kg and charge -0.11 C is located at P. Find: 1.the magnitude of the force on the particle 2.the direction of the force on the particle: degrees counter-...
*September 14, 2014 by RW*

**Physics helppp**

Figure 5-53 shows a man sitting in a bosun's chair that dangles from a massless, frictionless pulley and back down to the mans's hand. The combined mass of man and chair is 94 kg. Fig. 5-53 With what force magnitude must the man pull on the rope if he is to rise (a) with a ...
*July 14, 2010 by Sam*

**PHYSICS**

Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me.
*February 6, 2010 by Sarah*

**physics**

thus far in the course we have ignored that on the earths surface an object must have a slightly unbalanced force to rotate with the earth, pretending that the normal force precisely balances the objects weight. A student with a mass of 65.0kg stands at the equator. The radius...
*May 14, 2013 by marie*

**Physics Help, Please! **

When a car goes around a curve (without skidding), on a level road, Select one: a. no friction force is needed because the car simply follows the road. b. the friction force of the road on the car increases when the car’s speed decreases. c. the friction force of the road on ...
*November 4, 2012 by Michael *

**math/finance**

Assume that you are considering the purchase of a 30-year, noncallable bond with an annual coupon rate of 8.5%. The bond has a face value of $1,000, and it makes semiannual interest payments. If you require an 7.4% yield to maturity on this investment, what is the maximum ...
*September 22, 2012 by eric*

**Math**

Wile E. Coyote catapults himself off of a 500 ft. cliff with an initial velocity of 20 ft/sec. His height t seconds after catapulting is given by the function h(t) = −16t2 + 20t + 500 . (Note the y-intercept of (0, 500). a. Find his maximum height (Hint: he reaches ...
*September 12, 2014 by Irina*

**Grade 10 Math**

The Brooklyn Bridge in New York City is a suspension bridge that crosses the East River and connects Brooklyn to the island of Manhattan. If the origin is placed at the top of one of the cable suport towers, as shown, the shape of a cable that supports the main span can be ...
*February 3, 2013 by Vanessa*

**Physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 77.0 m and the coefficient of friction is 0.36?
*February 2, 2010 by Sasha*

**Physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 85.0 m and the coefficient of friction is 0.38?
*October 6, 2010 by Preston*

**Physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0 m and the coefficient of friction is 0.38?
*February 3, 2011 by Kristen*

**physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 82.0 m and the coefficient of friction is 0.39?
*January 16, 2012 by bob*

**physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0 m and the coefficient of friction is 0.43?
*April 8, 2015 by johnny*

**physics**

In the below case, in dynamics, how do i solve this pulley problem using newtons laws? here is the drawing picasaweb,google,co,uk/devanlevin/Album/photo#5219794055569750146 what is the acceleration of each of the bodies? the hanging body has a mass of 2kg the lying body has a ...
*July 6, 2008 by devan*

**Calculus**

27 ft of wire is to be used to form an isosceles right triangle and a circle. Determine how much of the wire should be used for the circle if the total area enclosed is to be a maximum? I can only find the minimum because the parabola is opening upward
*November 11, 2013 by H*

**Physics**

An experimenter finds that no photoelectrons are emitted from tungsten unless the wavelength of light is less than 270nm. Her experiment will require photoelectrons of maximum kinetic energy 2.0eV. what frequency of light should be used to illuminate the tungsten?
*September 23, 2014 by Paul*