Monday

September 1, 2014

September 1, 2014

Number of results: 27,894

**Physics-bobpursley please check**

This is the question I posted about two hours ago and I worked it out two ways-could you scroll down and check it, please?If I have a roller coaster, and hill 1 height is 50cm and hill height 2 is 25 cm and the PE is .9 as it approaches the top of hill 2, how do I calculate ...
*November 4, 2010 by Joey*

**MATH**

The eaves of a roof sloping at 23° overhand the walls, the edge of the roof being 75 cm from the top of the wall. The top of the wall is 5.4 metres above the ground. What is the height above the ground of the edge of the roof, to the nearest centimeter?
*January 27, 2011 by Rin*

**physics**

a student could either pull or push , at an angle of 30 deg from the horizontal, a 50-kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and the surface is .20 the crate is to be moved a horizontial distance of 15-m (a) compared to ...
*January 26, 2008 by melissa*

**Trigonometry**

frrom outlook tower 80ft. high, a man observes from a position 6.5ft. below the top of the tower that the angle of elevstion of the top of certain tree is 12deg40mins and the angle of depression of its base is 72deg20mins. If the base of the tower and the base of the tree are ...
*August 10, 2010 by Winsel*

**physics**

A jet plane lands with a speed of 87 m/s and can accelerate at a maximum rate of -5.30 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? What is the actual minimum distance needed to stop ...
*September 15, 2011 by ashley*

**physics**

An 800 kg police boat slows down uniformly from 50 km/h [E] to 20 km/h [E] as it enters a harbour. If the boat slows down over a 30 m distance, what is the force of friction on the boat? (Hint: You will need to convert the velocities into m/s.)
*July 15, 2014 by alisha*

**math**

The head of a round piston has a pressure of 210 psi pushing down on it. The piston is 3 inches in diameter. What is the force pushing the piston down?
*March 30, 2008 by walt*

**Physics/Science #2**

A rock is thrown verticaly upward from ground level at time t = 0. At t = 1.65 s it passes the top of a tall tower, and 0.95 s later it reaches its maximum height. What is the height of the tower? height = _______ m First, find the initial velocity from the height of the tower...
*January 25, 2007 by TechnoBoi11*

**english**

I need help!!!I am suppose to find the sentence with an error in Fragments, Comma Faults, Fused Sentences (errors that result when part of a sentence is punctuated as a complete sentence or two complete sentences are incorrectly joined) a. Unlike many of their counterparts at ...
*September 27, 2009 by Abriel*

**chemistry... HELP**

Equilibrium constant question!!!? Standard reduction potentials Reduction half-reaction E(V) Ag+(aq) + e- ---> Ag (s) 0.80 Cu ^2+ (aq) + 2e- ---> Cu (s) 0.34 Sn^4+(aq) + 4e- ---> Sn (s) 0.15 2 H+(aq) + 2e- ---> H2 (g) 0 Ni^2+(aq) + 2e- ---> Ni (s) -0.26 Fe^2+ (...
*November 3, 2012 by Ann*

**Physics**

Suppose with 200 N of force applied horizontally to your 1500 N refrigerator that is slides across your kitchen floor at a constant velocity. What are thre friction forces on the refrigerator?
*November 22, 2010 by Mike*

**principles of physics**

Two identical gliders slide toward each other on an air track. One moves at 2 m/s and the other at 1 m/s. If they stick together, the combination slides at ____________________. A) 0.5 m/s. B) 1 m/s. C) 1.5 m/s D) 2 m/s E) 2.5 m/s.
*February 19, 2012 by britches*

**physics**

A 650 N student is Rollerblading at a velocity of 7.8 m/s [W] when the student trips and slides horizontally along the trail, coming to a stop 0.95s. Determine the students average acceleration
*April 5, 2012 by Melissa*

**Pre-CalcPlease check**

Please check: 1.Write in expanded form: this is a sigma notation- 4 on top signma in middle k=1 on bottom to right of sigma is (k-1)(k-2) I solved: k=1 (1-1)(1-2)=0(-1)=0 K=2 (2-1)(2-2) = 1(0)=0 k=3(3-1)(3-2)=2(1)=2 k=4 (4-1)(4-)=3(2)=6 answer: 0+0+2+6 2. Write 4+9+16+25+36+49...
*December 30, 2011 by Bethany*

**Physics**

A uniform solid disk of radius 1.7 m and mass 81.3 kg is free to rotate on a frictionless pivot through a point on its rim. If the disk is released from rest in the position shown by the solid circle, what is the speed of its center of mass when the disk reaches the position ...
*March 19, 2011 by Jennifer*

**Math**

A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c) What is the ...
*May 28, 2013 by DeeDee*

**Math**

A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c) What is the ...
*May 29, 2013 by DeeDee*

**math**

A single die is rolled. (a) What is the probability that the number on top is a 3. (Give your answer correct to two decimal places.) (b) What is the probability that the number on top is an odd number. (Give your answer correct to two decimal places.) (c) What is the ...
*May 30, 2013 by Nora 2*

**physics**

A daredevil decides to jump a canyon of width 8.4 m. To do so, he drives a motorcycle up an incline sloped at an angle of 12.6 ◦ . The acceleration of gravity is 9.8 m/s 2 . What minimum speed must he have in order to clear the canyon? Answer in units of m/s
*November 19, 2012 by Anonymous*

**Physics**

A daredevil decides to jump a canyon of width 6.5 m. To do so, he drives a motorcycle up an incline sloped at an angle of 9.45◦. The acceleration of gravity is 9.8 m/s2 . What minimum speed must he have in or- der to clear the canyon? Answer in units of m/s
*June 20, 2014 by Kirbi*

**algebra 2**

What are two different transformations that will transform f(x)=5x+3 into g(x)=15x-12? A) 1. A vertical shift 15 units down, followed by a horizontal compression by a factor of . 2. A vertical stretch by a factor of 3, followed by a vertical shift 21 units down. B)1. A ...
*July 4, 2008 by Fefe*

**physics**

In one day, a 85 kg mountain climber ascends from the 1440 m level on a vertical cliff to the top at 2360 m . The next day, she descends from the top to the base of the cliff, which is at an elevation of 1310 m . a) What is her gravitational potential energy on the first day? ...
*January 6, 2014 by rock*

**physics**

What is the minimum work needed to push a 900 kg car 890 m up along a 7.5 degree incline? (a) ignore friction (b) Assume the effective coefficient of friction retarding the car is 0.20.
*November 8, 2010 by amy*

**Graph!**

Choose the best description for graphing the point (3,-4). Go to the left three and up four. Go to the right three and up four. Go to the right three and down four. Go to the left three and down four. Is not +3 to the right, and -4 down?
*November 5, 2006 by margie*

**Chemistry AP help**

7. A 100g mass of tungsten at 100 degrees C is placed in 200 mL of water at 20 degrees C. The mixture reaches equilibrium at 21.6 degrees C. Calculate the specific heat of tungsten. Ok, I tried working it out but I got q= 100g x 4.186 j/g*degrees C * (21.6 degrees C- 20.0 ...
*February 9, 2008 by mhaidar9108*

**Physics**

A 70.0 kg base runner begins his slide into second base while moving at a speed of 4.0 m/s. The coefficient of friction between his clothes and Earth is .70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction ...
*December 5, 2006 by Becca*

**Math Calculus**

Hi, can anyone please help me solving these problems? any help will be greatly appreciated 1-If a tank holds 1000L of water, which takes an hour to drain from the bottom in the tank, then the volume V of water remaining in the tank after t minutes is V=1000(1-t/60)^2 0<=t&...
*November 21, 2007 by Tyler*

**Algebra**

Solve x^2-10x+22=0 by using the quadratic formula. After I substituted in the values for A, B, and C, and broke it down I got 10 plus or minus 2 times the square root of three/2. How do you break this down further? I know ten can be divided by 2 to get five, and 2/2 is 1, but ...
*October 10, 2009 by Corinna*

**2nd grade math**

Shawn is writing down the family recipes in a cookbook. He has 21 recipes left to write down. He has 3 pages left to fill up. If he wants to put the same number of recipes on every page, how many goes on each?
*October 7, 2010 by Amber*

**physics**

A mass of 0.7 kg is attached to the end of a massless spring of spring constant 0.35 N/m. It is released from rest from an extended position. After 0.8 s, the speed of the mass is measured to be 1.5 m/s. What is the amplitude of oscillation? What is the total energy (relative ...
*March 28, 2012 by Katie*

**physics**

As soon as a traffic light turns green, a car speeds up from rest to 57.0 mi/h with constant acceleration 8.00 mi/h/s. In the adjoining bike lane, a cyclist speeds up from rest to 21.0 mi/h with constant acceleration 12.50 mi/h/s. Each vehicle maintains constant velocity after...
*September 2, 2012 by Anonymous*

**physics**

Two ﬁrecrackers explode at the same place in a rest frame with a time separation of 11 s in that frame. Find the time between explosions according to classical physics, as measured in a framemoving with a speed 0.7 c with respect to the rest frame. Answer in units of s
*May 29, 2013 by Anonymous*

**Physics**

Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a roller-coaster car with a mass of 1000 kg travels from the top of that drop without friction. The car then decelerates along a horizontal stretch of ...
*December 3, 2012 by Anonymous*

**math**

Judy lies on the ground 45 feet from her tent. Both the top of the tent and the top of a tall cliff are in her line of sight. her tent is 10 feet tall. About how tall is the cliff?
*November 4, 2013 by marisela*

**math**

If BC=2, AB=2 and B'C'=4 then compute A'B' the picture is a box starting lower left, the letters go A',B',C',P' clockwise. Then there are lines that go down to form a tip. In the middle going down those lines its just A,B,C,P. Then where it meets at the point it is A",B",C",P...
*August 21, 2010 by Anonymous*

**Math**

to measure the height of the Eiffel Tower in Paris, a person stands away from the base and measures the angle of elevation to the top of the tower to be 60 degrees. Moving 210 feet closer, the angle of elevation to the top of the tower is 70 degrees. How tall is the Eiffel Tower?
*February 14, 2012 by Donielle*

**math**

A radio tower stands on the top of a hill that is 85 feet high. From the bottom of the hill, the elevation angle to the base of the tower is 42 degrees and the elevation angle to the top of the tower is 60 degrees. How tall is the tower? I would like to know what steps to take...
*May 6, 2012 by Victoria*

**metaphor and metonymy**

hy:)can someone help me?i really need to know the difference between metaphor and metonymy..can you give me an example? http://www.tnellen.com/cybereng/lit_terms/terms/2terms.html#Metaphor Metaphor is defined and an example given at the top of this webpage; scroll down a bit ...
*January 11, 2007 by billa*

**Math**

A turtle is at the bottom of a 12 foot well. Each day it crawls up 3 feet, but each night it slips back 2 feet. After how many days will the turtle reach the top of the well? ANSWER: The turtle will reach the top of the well after [ ] days... Thanks
*September 5, 2011 by Jenna*

**Calculus**

A 25 foot ladder is leaning on a 9 foot fence. The base of the ladder is being pulled away from the fence at the rate of 10 feet/minute. How fast is the top of the ladder approaching the ground when the base is 9 from the fence? [Note: The ladder is protruding over the top of ...
*October 13, 2009 by Z32*

**Calculus**

A 17 foot ladder is leaning on a 6 foot fence. The base of the ladder is being pulled away from the fence at the rate of 5 feet/minute. How fast is the top of the ladder approaching the ground when the base is 6 from the fence? [Note: The ladder is protruding over the top of ...
*March 15, 2011 by Anonymous*

**maths**

An observer on top of a building 66 metres high,finds the angle of elevation to the top of a taller building to be 34 degrees.The angle of depression to the foot of the same building is 51 degrees.If the buildings are on the same ground level find the height of the taller ...
*March 13, 2013 by Shane*

**Chemistry**

A robust first grader goes for swimming lessons three times a week,and he enjoys it thoroughly.During the first week of December, he develops an upper respiratory infection, starts coughing continuosly, and has a high fever of 39ºC. His condition remains the same after five ...
*August 7, 2011 by ROCKY*

**HEAT TRANSFER**

Compute the heat flux thoroughly a 10 cm thick brick wall (k= 0.69 W/m-deg) Which has temperature of 105° C & 10° C maintained on its two faces. How this heat flux would vary when 3cm thick layers of magnesia insulation is added on the inside & outside faces of the wall? Also ...
*August 1, 2012 by SIDDIQUE*

**phy**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*January 28, 2013 by christ*

**physics**

1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
*February 12, 2014 by nandeve*

**Physics**

A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. v=.157m/s KE =0J when x=.1m a)First I need to ...
*March 3, 2008 by Andrea*

**Physics**

Consider a simple frictionless roller-coaster. It begins at x = 0, at a height of y = H. Then it drops into a dip, reaching a minimum at x = 100, with zero height (y = 0). Finally, it goes back up at x = 200, but only reaches a height of y = H/2. Assume the roller-coaster car ...
*March 12, 2014 by Mikayla*

**Physics**

An open tube of length L = 1.60 m and cross-sectional area A = 4.60 cm2 is fixed to the top of a cylindrical barrel of diameter D = 1.27 m and height H = 2.16 m. The barrel and tube are filled with water (to the top of the tube). Calculate the ratio of the hydrostatic force on...
*February 6, 2012 by Emily*

**Math**

math word problem a building 240ft tall casts a 100 foot long shadow. If a person stands at the end of the shadow and looks up to the top of the building, what is the angle of the persons eyes to the top of the building(to the nearest hundredth of a degree)?(assume the persons...
*April 29, 2013 by Jay*

**Calculus1**

You are designing a 1000 cubic cm closed cylindrical can with radius r and height h. Assume that there is no waste in cutting the aluminum for the side of the can, but that the circular top and bottom are cut from square sheets of aluminum 2r by 2r. Find the radius of the can ...
*April 9, 2014 by ACDub*

**Math**

A surveyor standing 56 meters form the base of a building measures the angle to the top of the building and finds it to be 36 degrees. Thesurveyor then measures the angle to the top of the radio tower on the guilding and find that it is 47 degrees. How tall is the radio tower?
*May 3, 2009 by Sarah*

**physics**

the man hanging upside down is holding a partner who weighs 491 N. Assume that the partner moves on a circle that has a radius of 5.09 m. At a swinging speed of 4.20 m/s, what force must the man apply to his partner in the straight-down position?
*July 1, 2013 by damien*

**Accounting**

Journalize the following transactions and omit the explanations. A. ABC Corporation purchased $15,000 of office furniture by putting $7,000 down in cash and the rest on account on April 8. B. The corporation paid $60,000 for a two-year lease on April 19. C. The corporation had...
*November 26, 2012 by Rescueme417*

**Physics**

1) a car moving at 50km/h crashes Into the barrier and stops in 0.25 m a) if a 10kg child were to be stopped in the same time , what is the average force must be exerted ? c)approximately what is the mass of an object whose weight equals to the force in Part b?Could you lift ...
*April 13, 2013 by Malak*

**physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +20.5 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +12.0 revolutions. (a) How much time does it take for the bike to come to rest? (b) What ...
*November 10, 2010 by sean*

**physics**

A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +24.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +16.0 revolutions. (a) How much time does it take for the bike to come to rest? s (b) ...
*November 17, 2011 by Taylor*

**Physics**

The tightrope walker gets tired and decides to stop for a rest. During this rest period, she is in translational equilibrium. She stops at middle of the rope and finds that both sides of the rope make an angle of è = 10.00° with the horizontal. If the mass of the tightrope ...
*October 19, 2012 by Lily*

**Math**

What is the better deal? Earning $1000 a day for the rest of your life or earning $.01 the first day and doubling it every day for the rest of yor life. How do you know?
*November 29, 2012 by Krista*

**physics**

a car accelerates from rest at a constant rate alpha for some time, after which it decelerates at a constant rate beeta and comes to rest. if the total time elapsed is t, the maximum velocity acquired by the car will be?
*August 15, 2014 by aman verma*

**Physics**

Hi guys, Im a bit stumped on how to solve an online physics homework problem and it's really bothering me. I have no idea how to come up with the angles or even attempt the problem and neither do my friends. We'd all really appreciate it if someone could help us. Many Thanks, ...
*November 27, 2008 by Pooja*

**Carpentry**

Parts of a concerte block
*January 31, 2010 by TOM*

**Physics**

A puck with mass m = 0.17kg slides along a frictionless horizontal surface at v = 5.3m/s . It hits and sticks to the free end of a spring with k = 17N/m Find the amplitude and period of the subsequent simple harmonic motion?
*April 1, 2014 by Eiban*

**english**

I was wondering if this is good for a descriptive paragraph with proper pronounciation. The gossipy neighbour that lives next door likes to be very nosey and tries to almost observe every move from everyone on the block. They watch out windows, from their cars, even out the ...
*February 18, 2010 by deborah*

**physics**

A pair of vertical plane mirrors stands with an angle of β = 56.5 degrees between them. A pencil of light approaches in a direction parallel to one of them, as shown. After the pencil has left the mirrors, in which direction will it be going? (Give your answer as the ...
*September 14, 2013 by steph*

**Aed 204**

Assignment: Creating an At-Risk Program Resources: Ch. 8 of Multicultural Education and Appendix E. Imagine that you have been asked to serve on the advisory board for a new, alternative school program in your school district. The advisory board must specify the factors that ...
*September 18, 2010 by Niki*

**science**

A small hockey puck slides without friction over the icy hill and lands 6.20 m from the foot of the cliff with no air resistance.What is its initial speed v0 at the bottom of the hill?
*September 27, 2012 by a*

**math help!**

bernardo folds the 2 top corners of a rectanglular piece of paper to form 2 conguent triangles and an isosceles trapezoid. The triangles each have an angle that measures 65. what are the measures of the 2 top angles in the trapezoid? a. 25 and 25 because 65 + 25=90 b. 115 and ...
*December 7, 2010 by DeNawQisha*

**Calculus**

A ladder 15 feet long leans against a vertical wall. Supppose that when the bottom of the ladder is x feet from the wall, the bottom is being pushed towards the wall at the rate of 1/2x feet per second. How fast is the top of the ladder rising at the moment the top is 5 feet ...
*November 11, 2013 by Kim*

**U.S. History to 1865**

What is the picture of Paying the Exciseman portraying? Here is what I said. There is a tree with the word Liberty on it in the background, there is a sign that is upside down that reads Stamp Act on it and hanging from the tree is a noose. There is a Patriot man holding down ...
*June 11, 2009 by B.B.*

**Math**

Derek wants to determine the height of the top of the backboard on the basketball goal at the playground. He places a standard 12-inch ruler next to the goal post and measures the shadow of the ruler and the backboard. If the ruler has a shadow of 10 inches and the backboard ...
*March 30, 2012 by Jae*

**Physics**

A box with a mass of 7.00 kg is at rest on a ramp that is at an angle of 20 degrees with the horizontal. The coefficient of static friction between the box and the ramp is 0.800. Use g = 9.80 m/s2. You now want to make the box move by applying a force. To start the box moving...
*October 10, 2011 by Jeanne*

**chemistry**

A possible mechanism for the overall reaction Br2 (g) + 2NO (g) -> 2NOBr (g) is NO (g) +Br2 (g) (equilibrium arrows: on top it says k1 and on bottom k-1) NOBr2 (g) (fast) step 1 NOBr2 (g) + NO (g) ->(on top of arrow k2) 2NOBr (slow) step 2 the question: which of the ...
*November 18, 2010 by ben*

**Math **

Reggie is a long distance runner. His daily 2-1/2 hour practice is divided evenly into three areas: warm-ups, running, and cool down. How many minutes total does Reggie spend warming up and cooling down each day at practice?
*March 27, 2014 by Crissy*

**Physics**

True or false Consider a simple frictionless roller-coaster. It begins at x = 0, at a height of y = H. Then it drops into a dip, reaching a minimum at x = 100, with zero height (y = 0). Finally, it goes back up at x = 200, but only reaches a height of y = H/2. Assume the ...
*March 12, 2014 by Monica*

**PHYSICS**

A 745i BMW car can brake to a stop in a distance of 122 ft from a speed of 60.0 mi/h. To brake to a stop from a speed of 80.0 mi/h requires a stopping distance of 221 ft. What is the average braking acceleration for the following intervals? Express the answers in mi/h/s and in...
*November 1, 2008 by lance*

**physics**

a car accelerates from rest at a constant rate 'a' for some time. after which it decelerates at a constant rate'b' and comes to rest. if the total time elapsed is t second, evaluate 1) the maximum velocity reached and 2) the total distance travelled.
*July 13, 2011 by pavatharani*

**science**

What is another word for a microscope's eyepiece? It starts with an O and has to have 6 letters. And what does Ocular mean?
*September 12, 2006 by Jordan*

**social studies for the 3rd time**

I need something that s related to California that starts with a Q
*June 11, 2008 by Andrew*

**spelling**

a second grade word that starts with A that means a person who helps people
*October 27, 2009 by desead*

**Grammar**

A prepositional phrase always starts with the preposition. A) True B) False I answered A
*November 14, 2012 by Marie*

**math**

count by eigths to create a number line for the data that starts at 1 and ends at 3.
*April 24, 2014 by sai*

**math**

count by eigths to create a number line for the data that starts at 1 and ends at 3.
*April 24, 2014 by andrew*

**physics**

A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to reach max height. B)...
*February 16, 2011 by mark matat*

**Physics**

A book whose mass is 3 kg is projected up a long 40 degree incline with an initial speed of 25 m/s The coefficient of kinetic friction between the book and the Mane is 0.20. a. Find the magnitude of the friction force acting on the book as it moves up the plane. b. For how ...
*November 19, 2006 by QT*

**chemistry**

A robust first grader goes for swimming lessons three times a week, and he enjoys it thoroughly. During the first week of December, he develops an upper respiratory infection, starts coughing continuously, and has a high fever of 39°C. His condition remains the same even after...
*June 15, 2011 by mema*

**Chemistry**

A robust first grader goes for swimming lessons three times a week, and he enjoys it thoroughly. During the first week of December, he develops an upper respiratory infection, starts coughing continuously, and has a high fever of 39°C. His condition remains the same even after...
*January 29, 2012 by Nikki*

**calculus ( related rates )**

a paper cup in the shape of a cone has a diameter of 10cm across the top, and is 8cm deep. if the cup is leaking out the bottom at 2pi cm^3/min, at what rate is thet area of the water surface ( only the top surface of the water) changing, when the cup has a the water depth of...
*June 22, 2011 by john*

**physics**

A 2.6 cm thick bar of soap is floating on a water surface so that 2.14 cm of the bar is underwater. Bath oil (of specific gravity 0.8)is poured into the water and floats on top of the water. What is the depth of the oil layer when the top of the soap is just level with the ...
*November 5, 2008 by Lines in the Sand122*

**physics for dummies! **

The man hanging upside down is holding a partner who weighs 699 N. Assume that the partner moves on a circle that has a radius of 3.37 m. At a swinging speed of 3.49 m/s, what force must the man apply to his partner in the straight-down position?
*February 10, 2011 by Hannah*

**physics**

In the figure the man hanging upside down is holding a partner who weighs 535 N. Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 3.75 m/s, what force must the man apply to his partner in the straight-down position?
*July 10, 2013 by simon*

**Physics HELP!!!!!!!!**

For the normal force in Figure 5.21 to have the same magnitude at all points on the vertical track, the stunt driver must adjust the speed to be different at different points. Suppose, for example, that the track has a radius of 3.1 m and that the driver goes past point 1 at ...
*February 21, 2007 by Mary*

**physics**

A train slows down as it rounds a sharp horizontal turn, going from 99.0 km/h to 41.0 km/h in the 13.5 s it takes to round the bend. The radius of the curve is 175 m. Compute the acceleration at the moment the train speed reaches 41.0 km/h. Assume the train continues to slow ...
*September 20, 2013 by Anonymous*

**physics**

A jet plane lands with a speed of 101 m/s and can accelerate at a maximum rate of -4.60 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? ___s b)What is the actual minimum distance needed to...
*September 14, 2010 by jc*

**physics**

a jet plane lands with a speed of 101 m/s and can accelerate at a maximum rate of -4.60 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? ___s b)What is the actual minimum distance needed to...
*September 15, 2010 by jer*

**physics**

Search: A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +18.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +11.0 revolutions. How much time does it take for the bike to come to rest? What ...
*February 25, 2011 by Taylor*

**Chemistry**

Why do the bond energies decrease in the order Ge-Cl, Ge-Br, Ge-I? 1. Covalent bond energies generally increase as you go down the periodic table 2. Covalent bond energies generally decrease as you go down the periodic table 3.Ionic bond energies generally decrease as you go ...
*October 13, 2013 by ss01*

**physics**

a fisherman's scale stretches 3.6 cm when a 2.7 kg fish hangs from it. what will be the amplitude and frequency of vibration if the fish is pulled down 2.5 cm more and released so that it vibrates up and down? i think the frequency is 2.63 Hz, but i don't know how to find the ...
*April 2, 2008 by leena*

**U.S. History**

During the civil war, name three reasons each why the north's money value went down and why the south's money went even more down than the north
*May 24, 2011 by Ashley*

**Real Estate Finance**

The mortgage company requires a down payment of $11,500 on a $70,000 house. How much down payment would be required on a house costing $87,500?
*November 12, 2012 by Anonymous*

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