Sunday

December 4, 2016
Number of results: 95,936

**PHYSICS**

A hiker, who weighs 976 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4350 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge. What is the magnitude of the force that a ...

*November 3, 2015 by Anonymous*

**physics**

i know how to do it, i keep getting the wrong answer!! a bob of mass 4.00 kg is suspended from a fixed point by a massless string of length 1.50 m. The bob moves in a horizontal circle with the string always making an angle theta=22 from the vertical. what is the speed of the ...

*October 10, 2007 by julia*

**physics**

A glider of length 12.7 cm moves on an air track with constant acceleration. A time interval of 0.563 s elapses between the moment when its front end passes a fixed point circled A along the track and the moment when its back end passes this point. Next, a time interval of 1....

*September 17, 2014 by Jessica*

**Physics **

A copper wire of diameter 0.30mm and length 1.50m is joined to another steel wire of same diameter and length 1.20m. The copper part of the double wire is hung vertically to a fixed point, while a small weight is connected to the lower end of the steel part. Joining the two ...

*October 31, 2013 by Cali*

**Physics**

A block is suspended from the end of a spring. An external force holds the block so that initially the spring is not stretched or compressed. When the block is released, it oscillates up and down between positions A and B. If the mass of the block is 0.5 kg and the spring ...

*February 20, 2012 by Mary*

**Check them please MAth**

1. Write the following ratio in simplest form: 32 min:36 min (1 point) 8:98:3632:9128:144 2. Marie saved $51. On Wednesday, she spent $8 of her savings. What ratio represents the portion of her total savings that she still has left? (1 point) 43:88:5143:5159:51 3. The price of...

*December 2, 2016 by Dipper Pines*

**physics**

A sign with a mass of 1000.0 kg is suspended from a wall with a cable that is attached to the wall at a point 3 m above a horizontal beam that causes the sign to be a distance of 4 m from the wall. What is the tension in the cable?

*October 12, 2009 by ken *

**Science**

In the figure below, a uniform beam of weight 420 N and length 3.2 m is suspended horizontally. On the left it is hinged to a wall; on the right is it supported by a cable bolted to the wall at distance D above the beam. The least tension that will snap the cable is 1200 N. (a...

*December 13, 2008 by Phillipe*

**maths**

A mixture contains two chemicals, A and B, with masses mA and mB. The total mass of the mixture, m, remains constant. B is converted into A at a rate that is inversely proportional to the mass of A and directly proportional to the square of the mass of B in the mixture at any ...

*March 9, 2010 by jessie*

**Physics**

Pls sir, kindly send the solution to my email. thanks. 1)A boat propelled so as to travelled with a speed of 0.50m/s in still water, moves directly ( in straight line ) across a river that is 60m wides. The river flow with a speed of 0.30m/s. How long in seconds does it take ...

*April 27, 2012 by Abbey*

**physics**

A 12 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass dangles over the pulley...

*June 3, 2007 by naomi*

**English**

Let's do gymnastics. This is a side exercise. Stand up, and put your legs apart at the shoulder width. Bend your body westward as you raise your right hand toward your armpit. Bend your body westward one more time as you raise your right hand above your head. Then bend your ...

*May 25, 2016 by rfvv*

**Physics**

The boom weighs 2450 and is attached to a friction less pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 39.0 of its length. Picture Link: tinypic./view.php?pic=53qp3m&s=5 What is the tension in the guy wire?

*April 27, 2013 by John*

**physics**

73. A mobile is formed by supporting four metal butterflies of equal mass m from a string of length L. The points of support are evenly spaced a distance apart as shown in Figure P5.73. The string forms an angle 1 with the ceiling at each end point. The center section of ...

*October 7, 2012 by audree*

**physics**

A mass, m1 = 5.5 kg, is in equilibrium while connected to a light spring of constant k = 132 N/m that is fastened to a wall (see a). A second mass, m2 = 10.9 kg, is slowly pushed up against mass m1, compressing the spring by the amount Ai = 0.17 m (see b). The system is then ...

*February 6, 2013 by Anonymous*

**Science**

An elastic cord of elastic constant k and length L is hung from point A having a massless block at the other end. A smooth ring of mass M falls from point A. What is the maximum elongation of cord?

*February 16, 2015 by sam*

**Physics**

An object of mass m=80 kg moves in one dimension subject to the potential energy U(x)=λ4(x2−a2)2+b2x2.(1) Here we use λ= 6 kg/(m2s2), a= 4 m, and b= 36 kg/s2. ------ then , (b) Find a stable equilibrium point x0 such that x0 is positive. (in meters) x0= ...

*November 4, 2013 by Shashanoid*

**PHYSICS HELPPPPP**

A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The density of ocean water is 1.025x10^3 kg/m^3. a) Calculate the guage pressure on the diver on the ocean floor. b) Calculate the absolute pressure on the diver on the ocean floor. ...

*January 21, 2007 by johnny*

**biology**

What is the relationship between mass, weight,and gravity? Mass and gravity determine your weight? correct

*January 24, 2007 by summer*

**Physics**

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 5, 2010 by Albert*

**Math**

The height (in feet) of a small weight oscillating at the end of a spring is h(t) = 0.5 cos(2t) where t is in seconds, 0 ≤ t ≤ 5. (This is calculus. Use radians!) (a)Calculate the weight’s average velocity over the time interval 1 ≤ t ≤ 3. Show ...

*August 29, 2012 by Dede*

**MECHANICS**

A string of length l carries a small pulley C from which is suspended a load W. The string hangs between two vertical walls which are at distance d apart.The end A is higher than end B by height h.find position of equilibrium defined by angle X. X is angle between AC and AB. d...

*November 23, 2010 by ACD*

**Physics**

A tower clock has an hour hand 2.70 m long with a mass of 60.o kg, and a minute hand 4.50 m long with a mass of 100 kg. Calculate the total rotational kinetic energy of the two hands about the axis of rotation. Sol: I know that Kr = 1/2Iw^2 or moment of inertia * omega squared...

*April 18, 2007 by Anderson*

**Medical Coding**

A 12-year-old boy presents with his father to the ER due to open wounds to his arm' hand, and upper leg. The injury occurred when the boy fell on a barbed-wire fence at the farm while running. Diagnosis: Multiple open wounds to the right forearm, right hand, and left thigh. ...

*January 13, 2013 by Julie*

**Physics**

1)The direction of the force on doubly ionized helium atoms(alpha particles)moving at right angles to a magnetic field is opposite to the direction of the force given by the third right-hand rule. true. 2)The electromotive force is a force that makes charges flow from a point ...

*April 11, 2008 by Jon*

**socialstdies**

Which of the following is not a right of a juvenile in custody? (1 point) the right to a trial*** the right to a jury of his or her peers the right against self-incrimination the right to an attorney 3. Which step of the juvenile justice process is similar to sentencing in ...

*March 2, 2015 by XenaGonzalez*

**Physics**

I got part a and b, but not c. We are trying to find delta T in part c, but I'm still confused on where to start even with the help. (a) An iron block of the mass 1.2 kg is suspended on a spring of the spring constant 140 N/m, and merged into a vessel with 5 liters of water. ...

*December 3, 2010 by Susan*

**math - pls check!!!**

Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want to work with). Then, use the same set of points to write the equation in standard form and again in slope-intercept form. (5, 1) and (-...

*January 13, 2015 by SkatingDJ*

**physics ---- really dnt get this at all**

if friction is set to zero and on planet Earth. Now, if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why doesn't it come to rest after stretching by a distance 'd'; proportional to the weight of the mass...

*April 10, 2011 by ashley --- HELP PLEASEE!!!*

**Physics**

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the distal bicep ...

*March 19, 2015 by Carolyn*

**Physics**

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the distal bicep ...

*March 23, 2015 by carolyn*

**Physics**

For this problem there is a picture of pendulums. They are numbered 1 through 5. Each pendulum is a certain length and has a washer at the end. 1) the weight is 5w. 2) this is the longest one and the weight is 3w. 3) weight is 5w. 4) weight is 10w 5) this is the shortest one ...

*October 20, 2009 by Hannah*

**Physics**

For this problem there is a picture of pendulums. They are numbered 1 through 5. Each pendulum is a certain length and has a washer at the end. 1) the weight is 5w. 2) this is the longest one and the weight is 3w. 3) weight is 5w. 4) weight is 10w 5) this is the shortest one ...

*October 20, 2009 by Hannah*

**Physics **

How much work must be performed by a hand or other such agent to move the 8kg block very slowly 10 cm to the right if the attached spring was initally relaxed? Let k = 200 N/m and mK = 0.5. Show the equation and the plug the numbers into the equation and then the answer at the...

*October 26, 2016 by Anonymous *

**math**

write a motion rule for the translation in part a. the palm of the hand moves from ( 3,2 ) to ( 5,4 ). so each point moves 2 units to the right and 2 units up

*January 8, 2007 by jose*

**Physics**

A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left of 10N. The ball at ...

*October 12, 2014 by Robert*

**CPT Codes**

A 12-year-old boy presents with his father to the ER due to open wounds to his arm, hand, and upper leg. The injury occurred when the boy fell on a barbed-wire fence at the farm while running. Diagnosis: Multiple open wounds to the right forearm, right hand, and left thigh. ...

*April 27, 2013 by Steve*

**Physics**

A person on top of a wall of height 3.4 m stands near the edge, leans over and tosses a putty wad of mass 1.3 kg vertically into the air as shown in the figure below. The wad reaches a maximum of 4 m above the top of the wall. The wad then comes down and hits the ground near ...

*February 20, 2011 by kelly*

**physics**

Two metallic spheres, each with a mass of 0.46 g are suspended as pendulums by light strings from a common point. They are given the same electric charge, and the two come to equilibrium when each string is at an angle of 5.2° with the vertical. If the string is 21.0 cm long...

*May 18, 2015 by samantha*

**Physics**

A mass of 100g is attached to one end of a massless rod, 10cm in length, which is pivoted about the opposite end. The rod is held vertical, with the mass at the top, and released. The rod swings. A. What is the speed of the mass at the instant that the rod is horizontal? B. ...

*November 10, 2014 by Joe*

**Math**

The equation of the motion of a body suspended by a spring is T=2π√m/k, where T is the time period, m is the mass of the body, and k is the force constant of spring. use this information to find the time period if a body of mass 10 kg is suspended by a spring of ...

*September 18, 2016 by Jourrapide*

**English**

For example, when people ask "We don't have to hand in the assignment right?" Why do some people answer "No." (They meant the assignment does not have to be handed in.) But if so, should the answer be "Yes." (Yes, that's right, we don't need to hand in the assignment.)

*May 15, 2009 by Samuel*

**volume,mass,weight**

if you travelled to a planet that had twice the force of gravity of earth and you have taken a small mass that is 1kg what is the mass weight and volume of the 1kg object on the new planet compared to earth

*March 4, 2012 by dw*

**physics**

A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg, and a radius of L/2 centered about the free end...

*February 19, 2012 by janny*

**7th grade math standard form scientific notation**

In standard form: 5. 3.2 x 10^3 7. 4.1 x 10^8 9. Write the average weight of a blue whale, 2.6 x 10^5, in standard form. 15. 2.5 x 10^-3 17. 1.05 x 10^-2 19. Write the size of a grain of very fine sand, about 9.35 x 10^-3 cm, in standard form. Can somebody help? I have been ...

*September 28, 2012 by Delilah*

**science **

a bullet of mass 20g traveling horizontally at 100m/s embedded itself in the center of block of wood mass 1kg which is suspended by a light vertical string of length

*July 19, 2016 by Anonymous*

**PHYSICS**

The figure shows a jet engine suspended beneath the wing of an airplane. The weight of the engine is 14600 N and acts as shown in the figure. In flight the engine produces a thrust of 55100 N that is parallel to the ground. The rotational axis in the figure is perpendicular to...

*May 2, 2015 by Anonymous*

**English**

Swimming Strokes by Lee Carroll Paragraph 2: When most people think of swimming, they think of the crawl stroke. It involves flutter kicking with your legs as you pull yourself through the water with your arms while alternating your breathing from side to side. The most ...

*March 23, 2011 by katelyn*

**physics oscillator energy**

a block of wood of mass 0.25kg is attached to one end of a spirnf og constant stiffness 100N/m. The block can oscillate horizontally on a frictionless surface, the other end of the spring being fixed. a) calculate the maximum elastic potential energy of the system for a ...

*November 3, 2008 by Jess*

**college physics**

In the figure below, two point particles are fixed on an x axis separated by a distance d. Particle A has mass mA and particle B has mass 2.00mA. A third particle C, of mass 90.0mA, is to be placed on the x axis and near particles A and B. In terms of distance d, at what x ...

*October 11, 2009 by Jeff*

**physics**

There are two pit balls equally charged and each with a mass of 1.5g. While one ball is suspended by a thread, the other is brought close to it and state of equilibrium is reached. In that situation,the two balls are seperated by 2.6cm and the thread attached to the suspended ...

*January 5, 2015 by Connor*

**Physics**

Block A has a mass of 20kg and is placed on top of cart B which has a mass of 100 kg. Blosk A has a pulley attatched to it with a force of P acting towards the right. Cart B is on rollers. The coefficient of kinetic and static friction are both the same value of 0.5. Find the ...

*October 23, 2009 by Jessi*

**physics**

TRIAL 1 A. ) Bag A + 6 stones Mass (kg) - 0.037 kg Mass of weight hanger + slotted weights - 210 g/ 0.21kg Tension 1 (N) - ?? Acceleration (m/s2) - ?? B. ) Bag B + 4 stones Mass (kg) - 0.08 Mass of weight hanger + slotted weights - 210 g/ 0.21kg Tension 1 (N) - ?? Acceleration...

*May 4, 2011 by nik*

**math**

Find the Riemann sum associated with f(x)=4x^2+2, n=3 and the partition xsub0=-2 xsub1=1 xsub2=2 xsub3=4 of [-2,4] (a) when xsubk is the right end-point of [xsubk-1, xsubk] . (b) when when xsubk is the mid-point of [xsubk-1, xsubk] please help. i thought fora the anser was 216...

*November 28, 2006 by amanda*

**Algebra**

Write the equation of the line passing through the given point with the indicated slope. Give your results in slope-intercept form. Point: (0,5) Slope:m=3/5. Show work Well, youknow the form is y= mx+b you are given m. You are given a point (0,5) Put that point into the ...

*May 20, 2007 by Linda*

**writing skills**

2. Because information listed on a website can change from day to day, _______ must be included in the end citation on the Works Cited page.A. the title of the siteB. the publication dateC. the date of accessD. the URLStudent Answer: B Answer: ...

*April 1, 2015 by ellie*

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. mass of 15.21g of a cookie.

*April 7, 2010 by James*

**physics**

A rod of length 30.0 cm has linear density (mass-per-length) given by lambda = 50.0 g/m + 20.0 y g/m2 , where y is the distance from one end, measured in meters. (a) What is the mass of the rod? (b) How far from the y = 0 end is its center of mass?

*May 18, 2013 by Anonymous*

**Physics**

Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...

*December 6, 2014 by Brock*

**Chemistry**

q1. The label on an antacid remedy states that each tablet contains 750 mg of aluminum hydroxide. Calculate the volume of stomach acid, 0.10 mol/L HCl(aq), which can be nuetralized by one antacid tablet. Q2. Compare equivalence point to endpoint q1. The label on an antacid ...

*September 22, 2006 by Brittany Rusk*

**M1, Mechanics **

A particle of mass 4kg is suspended from a point A on a vertical wall by means of a light inextensible string of length 130cm.A horizontal force P, is applied to the particle so that it is held in equilibrium a distance of 50cm from the wall. Find the value of P and the ...

*March 19, 2012 by Tony*

**Algebra**

Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want to work with). Then...

*December 6, 2013 by Anonymous*

**phy**

Review. An object with a mass of m 5 5.10 kg is attached to the free end of a light string wrapped around a reel of radius R 5 0.250 m and mass M 5 3.00 kg. The reel is a solid disk, free to rotate in a vertical plane about the horizontal axis passing through its center as ...

*January 3, 2013 by Anonymous*

**physcis**

A beam resting on two pivots has a length of L = 9.00 m and mass M =81.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m= 43.0 kg steps onto the ...

*November 11, 2012 by Anonymous*

**physics**

A glider of length 12.7 cm moves on an air track with constant acceleration. A time interval of 0.563 s elapses between the moment when its front end passes a fixed point circled A along the track and the moment when its back end passes this point. Next, a time interval of 1....

*September 18, 2014 by MEEE*

**physics**

A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical.

*October 9, 2008 by Ellen*

**Mcmaster**

A pendulum consists of an object of mass 2.26 kg that hangs at the end of a massless bar, a distance 2.02 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 54° with the vertical.

*March 7, 2012 by Gabbie*

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. use dimensional analysis mass of 15.21g of a cookie.

*April 7, 2010 by James*

**physics**

A rod of length 30.0 cm has linear density(mass-per-length) given by [lambda]= 50.0g/m + 20.0x g/(m^2) where x is the distance from one end, measured in meters.(a) What is the mass of the rod? (b) How far from the x=0 end is its center of mass? never mind. i got it.

*April 19, 2007 by jean*

**Chemistry :/**

A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 mL of 0.1063 M HCl to reach the bromocresol green end point. Find the weight percent of NH3 (FM 17.031) in the cleaner.

*January 23, 2012 by Tanya*

**Physics**

A weight suspended from an ideal spring oscillates up and down with a period T. If the amplitude of the oscillation is doubled, the period will be ? A. 1.5 T B. 2T C. T/2 D. T E. 4T

*July 23, 2016 by SAGAR*

**Physics**

Jack Sparrow swings on a 3 m long rope that was horizontal before he jumped from the boom of the Black Pearl. At the very bottom of his arc, he grabs Elizabeth Swann and they swing upward together. Sparrow (Depp) has a mass of 75 kg, and Swann (Knightley) has a mass of 50 kg (...

*July 12, 2012 by Jessica*

**Physics**

An amusement park ride consists of a rotating circular platform 8.26 m in diameter from which 10 kg seats are suspended at the end of 1.14 m massless chains. When the system rotates, the chains make an angle of 16.2 degrees with the vertical. The acceleration of gravity is 9.8...

*November 15, 2009 by bubba*

**PHYSICS!!**

An amusement park ride consists of a rotating circular platform 8.26 m in diameter from which 10 kg seats are suspended at the end of 1.14 m massless chains. When the system rotates, the chains make an angle of 16.2 degrees with the vertical. The acceleration of gravity is 9.8...

*November 16, 2009 by bubba*

**PHYSICS thankyou in advance...**

A cake of soap placed in a bathtub of water sinks. The buoyant force on the soap is: a- Zero b- Less than its weight c- Equal to its weight d- More than its weight I believe is D for if the cake of soap sinks, it means that the specific gravity is more than 1, so it is more ...

*April 16, 2011 by DMITRIC*

**Physics ~!!!!!!!**

A man of mass 76.1kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 23.9kg and is 3.0m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the scaffold. What is the ...

*November 12, 2012 by joane *

**Algebra**

I know that standard form is Ax+By=C, but I'm not really sure how to do this problem. All help is welcome. Thanks in advance. Write an equation for each line: through (-1,3) and parallel to y=2x+1 I know that the slop will be 2 because it is parallel. If m=2 then used the same...

*September 25, 2006 by Faramir*

**PHYSICS (HELP!!!)**

An object of mass m=80 kg moves in one dimension subject to the potential energy U(x)=λ4(x2−a2)2+b2x2.(1) Here we use λ= 9 kg/(m2s2), a= 9 m, and b= 719 kg/s2. (a) How many equilibrium points (stable and unstable ones) does this potential have? n= 1 2 3 4 5? (b...

*November 1, 2013 by Anonymous*

**Fluid Mechanics**

The components and their dimensions of a hydraulic jack are shown in the figure. The specific gravity of the fluid in the jack is SG=0.8. A force F=400 N is applied at the left end of the handle, which is hinged at the right end. Determine: (a) The fluid pressure p1 on the ...

*June 11, 2012 by Bob*

**physics**

A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 2.97 103 m. During this performance the pilot whose weight is 835 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the highest point of the loop determine his apparent ...

*December 2, 2012 by HALP!!!*

**Physics**

A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 3.70 103 m. During this performance the pilot whose weight is 740 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the highest point of the loop determine his apparent ...

*February 3, 2016 by Bust Nuttington*

**physics**

A cake of soap placed in a bathtub of water sinks. The buoyant force on the soap is: a- Zero b- Less than its weight c- Equal to its weight d- More than its weight I believe is D for if the cake of soap sinks, it means that the specific gravity is more than 1, so it is more ...

*April 17, 2011 by DMITRIC*

**Calculus Reimann Sum**

Approximate ∫_-2^3(x+3)dx via the Riemann sum. Use the partition of five subintervals (of equal length), with the sample point barx_i being the right end point of the i-th interval. I attempted this problem and got -40/3, but it's not being accepted. I'm not sure what I'm ...

*November 4, 2016 by Anonymous*

**Physics**

Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring. When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m. Assume that immediately after block (weight of 280 N) is hung at the ...

*August 1, 2015 by Anonymous*

**physics**

"A 3.5 kg monket is suspended motionless 35 meter above the ground by holding two vines (a vertical vine and a diagonal vine)" We need to find the tension force in the diagonal vine as well as the angle of the diagonal vine with respect to the y axis. I'm having trouble making...

*October 11, 2015 by ana*

**Physics**

The near and the far points of a short-sighted are 8 cm and 20 cm from the eyeball. a) What power of corrective lens is needed for this eye to see distant objects clearly? b)What will the resulting near point then be?(Assume that the lens is placed very close to the eye) ...

*February 18, 2016 by Sophie*

**physics**

As shown in the figure, a bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed of v/2. The pendulum bob is suspended by a stiff rod of length ℓ and negligible mass. 2.1 Derive an expression for the minimum value...

*June 8, 2016 by Tan*

**Chemistry**

What weight of glycerol C3H5(OH)3 molar mass is 92 would have been add to 1000g of water in order to lower the freezing point

*June 16, 2011 by Anonymous*

**Chemistry**

What weight of glycerol C3H5(OH)3 molar mass is 92 would have been add to 1000g of water in order to lower the freezing point

*June 16, 2011 by Anonymous*

**Physics 2**

Suppose, in the figure below, a 0.90-m rod experiences a 1.2-T magnetic field and the hand keeps it moving to the right at a constant speed of 3.5 m/s. If the current in the circuit is 0.040 A, what is the average power being delivered to the circuit by the hand?

*June 11, 2011 by June*

**Physics**

A large ant is standing on the middle of a circus tightrope that is stretched with tension T_s. The rope has mass per unit length mu. Wanting to shake the ant off the rope, a tightrope walker moves her foot up and down near the end of the tightrope, generating a sinusoidal ...

*January 9, 2009 by Sam*

**Physics**

A long thin rod of mass M = 2:00 kg and length L = 75:0 cm is free to rotate about its center as shown. Two identical masses (each of mass m = .403 kg) slide without friction along the rod. The two masses begin at the rod's point of rotation when the rod is rotating at 10.0 ...

*December 24, 2011 by Lindsay*

**Physics**

A 10N meterstick is suspended by two sping scales, one at the .08 m mark and the other at the .9 m mark. If a weight of 5N is hung at the .2 m mark and a weight of 17N is hung at the .55 m mark, what will be the reading on each scale? I have: F(_1)+F(_2)=5+10+17=32 With moment...

*December 8, 2010 by Jennifer*

**physics**

A rod of length 39.0 cm has linear density (mass-per-length) given by the following equation, where x is the distance from one end. ë = 50.0 g/m + 21.0x g/m2 (a) What is its mass? (b) How far from the x = 0 end is its center of mass? I think you would plug in the 39cm for the...

*March 22, 2009 by mightymouse*

**Physics**

Please help me with this!! I am really confused about it... 1. A 75 kg. man steps off the end of a diving board, and hits the water at 7.7 m/s. Ignoring air resistance, what was the mans PE (potential energy) right before he stepped off the diving board? *I know that the ...

*February 29, 2016 by Becca*

**Uni Math**

Simplify and state the domain: x'2 +1 . x'2 - 9 x'2 + 2x – 3 x'2 – 2x -3

*September 15, 2011 by Melanie*

**physics**

A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam. 1)What is the ...

*March 29, 2011 by Anonymous*

**Physics-Mechanics**

A pulley is massless and frictionless. 3 kg, 2 kg (on the left), and 6 kg (on the right) masses are suspended What is the tension T1 in the string be- tween the two blocks on the left-hand side of the pulley? Can I solve this like if it was two masses? My prof gave an example ...

*September 22, 2010 by Genevieve*

**math**

Uniform rod AB with end B resting against rough vertical wall. Coefficient of friction between wall and rod is μ. Rod is 2m long and has mass 3kg. Rod is kept in limiting equilibrium by a light inextensible string, one end of which is attached to the end A of the rod and ...

*April 23, 2014 by Michael*

**Physics**

A uniform bar weighing 60N has a length of 4m and it is supported at its ends by a string. A load W=20N is placed at some point on the bar such that it is in equilibrium when the tension in the string at the left end is 80N, a) locate tge position of W. b) find the tension in ...

*May 16, 2016 by Drew Gonzales*