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March 3, 2015

Search: A force of 5.0 is required to stretch a certain spring by 1.2 .How far must this spring be stretched for its potential energy to be 0.015 ?

Number of results: 58,568

Chemistry
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
September 16, 2008 by Jimmy

Statistics !
Hi I have calculated some statistics using a spreadsheet program and I have to compare three slopes of regression and their significance level in an energy species hypothesis.. -2.11 level of significance is 5% -4.73 level of significance is 1% -4.13 level of significance is 1...
June 4, 2009 by Gary

Chem
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g.oC over the entire liquid range, that the specific heat of steam is 1.99 J/g.oC, and the heat of vaporization ...
February 4, 2012 by Dan

physics
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 25000V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into ...
March 26, 2008 by Cindy

physics
A uniform metal rod of mass 100 kg and L (2.5m) is suspended from the side of the building. On the far end of a mass of 100 kg is hung by a rope, (distance L from a building). The rod is connected to the building on the left end by a pivot, (and a force F is exerted on the rod...
November 25, 2010 by Luke

Physics
Georgie was pulling her brother (of mass 26 kg) in a 11.9 kg sled with a constant force of 37 N for one block (100 m). How much work did Georgie do? How long would a 300 W lightbulb have to glow to produce the same amount of energy expended by Georgie?
January 6, 2012 by Anonymous

physics
A source of e.m.f 110v and frequency 60hz is connected to a resistor, an indicator and a capacitor in series. When the current in the capacitor is 2A.the potential difference across the resistor is 80v and that across the inductor is 40v.calculate the -(1)potential difference ...
March 24, 2010 by Ayo

Physics
A parallel-plate capacitor is designed so that the plates can be pulled apart. The capacitor is initially charged to a potential difference of 80 Volts when the plates are 1.0 mm apart. The plates are insulated so that the charge cannot leak off. What is the potential ...
September 22, 2011 by TP

Physics
In a location in outer space far from all other objects, a nucleus whose mass is 3.57232e-25 kg and which is initially at rest undergoes spontaneous "alpha" decay. The original nucleus disappears, and two new particles appear: a He-4 nucleus of mass 6.640678e-27 kg (an "alpha ...
October 7, 2011 by bryce tanaka

Advanced Functions
The vertical position, h, in metres, of a gondola on a Ferris wheel is modelled using the function h = 10 sin ((pi/15) (t-d)) + 12 where t is the time, in seconds. The gondola must assume a vertical position of 7 m at t=0 s , and be on its way upward. Determine the phase shift...
November 20, 2009 by -

physics
A car has a flywheel ( a diks of R=0.2m and uniformly distributed mass M=100kg) that can convert 25% of the rotational kinetic energy into translational kinetic energy. The mass of the car is 1000kg ( including flywheel). Suppose the car is at rest, and the flywheel has a ...
December 30, 2013 by Al

Physics
A package is thrown down a curved ramp as shown in the figure. The package moves from A to B through a quarter-circle with radius R=3.00m. The mass of the package is 25.0kg. The package starts from rest at point A and there is no friction. A) Find the speed of the package at ...
April 9, 2013 by Anonymous

physics
A boy drags a 100 N sled up a 20 degree slope at constant velocity. If the coefficient of friction between the sled and hill is 0.2 what force must he exert at an angle of 35 degrees with respect to the hill?
June 9, 2011 by amy

physics
How much tangential force must be exerted to stop a rotating solid disk (radius = 1.50 feet) weighing 480 lbs in 12.0 seconds? The disk is initially rotating at 600 RPM.
December 12, 2013 by Anonymous

Math
a certain state's lottery game, lotto, is set up so that each player pays $1 per ticket and chooses six different numbers from 1 to 49. if the six numbers chosen match the six numbers drawn each Saturday evening, the player wins the top cash prize. the order in which the ...
November 7, 2012 by Tish

Physics
A football was thrown from the line of scrimmage with a velocity of 30 m/s at an angle of 30o above the horizontal. (a) Determine the time required by the ball to reach the maximum height of its flight path. (b)Determine the distance from the line of scrimmage that a receiver ...
June 24, 2012 by Aria

Chemistry
How many moles of HNO3 are required to make 250mL of a 2.4M solution? How many grams of KOH are required to make 125mL of a .50M solution?
March 4, 2009 by Ali

chemistry
How is the way metals form ions different from the way nonmetals form ions? Think about this. When Na, a metal, becomes an ion, what must it do? It has one electron in its outside shell. When Cl, a non-metal, forms an ion, what must it do? It has seven electrons in its outside...
December 17, 2006 by carter

physics
A 2 kg block is pushed 2 m along a fixed horizontal surface by a horizontal force of 20 N. The coefficient of kinetic friction of the surface is µk= 0.40. (a) How much work is done by the 20 N force? (b) what is the work done by the friction force? (c) What is the total work ...
November 3, 2011 by pakilina

electric
When an electron moves from A to B along an electric field line in Fig. 24-29, the electric field does 3.66 x 10-19 J of work on it. What are the electric potential differences (a)VB - VA, (b)VC - VA, and (c)VC - VB? in the picture there r four field lines going from down to ...
April 14, 2009 by sweety

Physics
Ernest Rutherford fired alpha particles (helium nuclei) at a sheet of gold foil rolled as thin as he could get it. Some of these particles passed straight through the foil, some bounced off at various angles, and some rebounded directly backwards. From this experiment ...
June 14, 2007 by Hryn

Statistics
Consider the following multiple regression results. Using a= .05 as the significance level, identify all statistically significant predictors. In a relative sense, which variable has the strongest impact? What is the interpretation of the “constant” term? Independent Variables...
September 5, 2011 by GG

Physics
A force sensor is used to measure a force applied to a 7.5 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 16.5 N. This force makes the box start to move with an acceleration of 0.5 m/s2. Find s and k respectively. I keep...
September 30, 2009 by Bella

physics
A steroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.5e4kg and the force causes the speed to change from 7100 to 5500m/s. (A) What is the work done by the force? (B) If the asteroid slows...
February 26, 2012 by Natasha

e-buisness
For this Individual Project you are required to address how a service related example company like C&M has implemented e-business and explain in detail how the example company implemented the e-business strategy and was it successful? Focus on how well or how poorly the ...
November 23, 2007 by jessica

biology
need help few questions 1. a signaling cell produces a signal that is detected by what type of cell? 2. If the interior of a typical cell is negatively charged, what type of charged ions will not require energy to diffuse into the cell using an ion channel? 3. Receptor ...
November 11, 2014 by ava

science
need help few questions 1. a signaling cell produces a signal that is detected by what type of cell? 2. If the interior of a typical cell is negatively charged, what type of charged ions will not require energy to diffuse into the cell using an ion channel? 3. Receptor ...
November 11, 2014 by ava

science
need help few questions 1. a signaling cell produces a signal that is detected by what type of cell? 2. If the interior of a typical cell is negatively charged, what type of charged ions will not require energy to diffuse into the cell using an ion channel? 3. Receptor ...
November 12, 2014 by ava

chemistry
2C2H6+702=4CO2+6H20 how many grams of oxygen are required to completely burn60.0g ethane (C2H6) show work Using the above equation how many Lof 02 are required to burn 20.0Lof ethane thank u soo much this is for a test
May 1, 2012 by megan

college chemistry
CH4 + 2 Cl2--> CH2Cl2 + 2HCl Cl-Cl bond energy: 242 kj/mole 1. Calculate the amount of energy (Joules) needed to break a single Cl-Cl bond. 2. Calculate the longest wavelength of light (meters)that can supply the energy per photon necessary to break the Cl-Cl bond.
March 31, 2010 by Anonymous

physics
What is the force on an electron moving at v = 2.5*10^5 m/s away from a long wire,3mm from the electron, carrying a 12 A current? Give the magnitude & direction of the force. I calculated mag induction using B = u0I/2(pi)*a and force on the electron using F = Bqv where q is ...
October 12, 2008 by Sandhya

PHYSICS
An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 1.00 × 104 V. (a) Find the final velocity after the original acceleration period. (b) It then passes between two horizontal plates 6.0 cm long and 1.0 cm apart which ...
February 24, 2010 by Arianne

science
Explain the relationship of the temperature of a substance during a change of state and the amount of thermal energy.Be sure to include information regarding change of state, absorption and realising of energy, and graph of thermal energy versus the temperature
September 6, 2007 by bah

physics
A tennis ball of 60g is dropped from a height of 2.0m,It rebounds but loses 25% of its kintic energy as thermal energy.Ignoring air resistance,calculate (1)the kinetic energy of the tennis ball when hits the ground. (2)the height reached on the ground
April 6, 2011 by Physics,help.

physics
Physics force of friction question a shuffle board disk is accelerated to a speed of 5.8m/s and released. if the coefficient of the kinetic friction between the disk and the concrete court is 0.3, how far does the disk go before it comes to a stop?The courts are 15.8meters long
March 28, 2010 by jake

physics
A neutron in a reactor makes an elastic head-on collision with a nitrogen atom that is initially at rest. (The mass of the nitrogen nucleus is about 14 times that of the neutron.) (a) What fraction of the neutron's kinetic energy is transferred to the nitrogen nucleus? (b) If ...
October 28, 2012 by heather

Physics
A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.50m long and weighs 500N. At a certain instant the worker holds the beam momentarily at rest with one end at distance d=1.50m above the floor by exerting a ...
January 10, 2011 by Monique

physics
A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.50m long and weighs 500N. At a certain instant the worker holds the beam momentarily at rest with one end at distance d=1.50m above the floor by exerting a ...
January 10, 2011 by Ngoc

Physics
A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off? (b) If Mu is only half...
August 20, 2009 by QUESTION

chemistry
Calculate the weight (in mg) of borax Na2B4O7.10H20 required to react with 25.0 mL if 0.100 M HCI No. moles HCl consumed = __________ moles No. moles borax required = __________ moles Molar mass of borax = __________ g mol-1 (Na2B4O7.10H2O) Weight borax required = __________ g...
April 22, 2013 by alex

Science
I really need help in Science. Right now in science we are doing renewable energy. For the assignment we have two choices, a house or car of the future, I decided to do a house. The question is, "How could renewable energy sources be used in a house?" For the house you, ...
January 15, 2014 by SandpitTurtle

physics
in ascending to a higher altitude,the segment AB of an airplane wing makes an angle of 20 degree.for such a conditions to exist, the force on the wing should be 12,000 newton perpendicular to AB. what is the lift force and drag force?
January 12, 2011 by gigi

Physics
A box is being with a velocity v by a force P (parallel to to v) along a level horizontal floor. the normal force is Fn, the kinetic frictional force if fk, and the weight of the box is mg. Decide which forces do positive, zero or negative work and why?
February 12, 2012 by Nilan

Physics
A box is being moved with a velocity (v) by a force (p)(parallel to v) along a level horizontal floor. The normal force is (Fn), the kinetic frictional force is (fk), and the weight of the is box is (mg). Draw a free-body diagram of this situation
February 13, 2012 by Amy

algebra-Am I right so far
Use the quadratic formula to determine the x-intercepts (if any)f(x)=2x^2=2 am I right so far? f(x)ax^2+bx+c y=ax^2+bx+c y=2x^2+2 y=0=>2x^2+2=0 =>2x^2+2=0 ax^2=2,bx=2,c=0 x=b=sqrtb^2+4ac over 2a x=(2)+sqrt(2)^24(2)(0)over2(2) x=sqrt4+4over 2
May 2, 2010 by dani

Physics
A roller coaster travels 170 ft at an angle of 47.5◦ above the horizontal. How far does it move horizontally? How far does it move vertically? Answer in units of ft
September 18, 2011 by Anonymous

Biomechanics
A sailboat heads north at 3 m/s for 1 hour and then tracks back to the southeast (at 45 degrees to north) at 2 m/s for 45 minutes. a. How far has the boat sailed? b. How far is it from its starting location?
September 27, 2013 by Walter

Physics
If 7.00hp are required to drive a 1500-kg automobile at 66.0 km/h on a level road. What power is necessary to drive the car at 66.0 km/h down a 1.00 % grade? It requires 42.9 hp to drive the car at 66.0 km/h up a 10.0 % grade (a hill rising 10.0 m vertically in 100.0 m ...
May 4, 2011 by Allison

physics
If 7.00hp are required to drive a 1500-kg automobile at 66.0 km/h on a level road. What power is necessary to drive the car at 66.0 km/h down a 1.00 % grade? It requires 42.9 hp to drive the car at 66.0 km/h up a 10.0 % grade (a hill rising 10.0 m vertically in 100.0 m ...
May 5, 2011 by Allison

physics
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 9.7-kg projectile from rest to a speed of 6.5 × 103 m/s. The net force accelerating the projectile is 8.0 × 105 N. How much ...
June 24, 2013 by BRAD

physics
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 7.0 kg projectile from rest to a speed of 4.0 x 103 m/s. The net force accelerating the projectile is 4.9 x 105 N. How much ...
September 20, 2013 by paul

physicsh
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of 3.9 103 m/s. The net force accelerating the projectile is 4.8 105 N. How much time is...
October 31, 2013 by butcha

science
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of 3.9 103 m/s. The net force accelerating the projectile is 4.8 105 N. How much time is...
November 1, 2013 by butcha

PHYSICS
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 8.9-kg projectile from rest to a speed of 4.2 × 103 m/s. The net force accelerating the projectile is 1.4 × 105 N. How much ...
March 16, 2014 by Tom

Physics
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 1.9-kg projectile from rest to a speed of 5.1 × 103 m/s. The net force accelerating the projectile is 8.6 × 105 N. How much ...
September 25, 2014 by Sam

FEEDBACK CONTROL SYSTEM
Figure below shows the block diagram of a dc-motor control system (note the dc-motor is represented by G(s)= K(s+3)/s(s+1)(s+2).The signal N(s) denotes the frictional torque at the motor shaft. a) Find the transfer function H(s) so that the output Y(s) is not affected by the ...
October 9, 2013 by FeedbackHELP!!

FEEDBACK CONTROL SYSTEM
Figure below shows the block diagram of a dc-motor control system (note the dc-motor is represented by G(s)= K(s+3)/s(s+1)(s+2).The signal N(s) denotes the frictional torque at the motor shaft. a) Find the transfer function H(s) so that the output Y(s) is not affected by the ...
October 10, 2013 by FeedbackHELP!!

Physics - Electricity
Can you please check my answers. 1) What carries energy through wire? electrons 2) What happens to some of the energy when it moves through the wire? becomes lost due to the movement of energy requiring some kinetic energy 3) If a resistance is large, why does the wire heat up...
November 24, 2007 by xX_Supaman_Xx

Physics
X-rays with an energy of 300 keV undergo Compton scattering from a target. If the scattered x-ray are directed at 30 degrees relative to the incident rays, find a)The Compton shift at this angle b) The energy of the scattered x-ray c)The energy of the recoiling electron
March 18, 2011 by amy

Physics
X-rays with an energy of 300 keV undergo Compton scattering from a target. If the scattered x-ray are directed at 30 degrees relative to the incident rays, find a)The Compton shift at this angle b) The energy of the scattered x-ray c)The energy of the recoiling electron
March 22, 2011 by Jennifer

chemistry
Free Energy and Temperature A certain reaction is non-spontaneous at lower temperatures but becomes spontaneous when the temperature is raised sufficiently. For this reaction, S is positive. S is negative. H is negative. G becomes positive at higher temperatures. G is always ...
October 18, 2011 by tt

PHYSICS
An automobile battery has an emf of 12.6 V and an internal resistance of 0.0500 . The headlights together present equivalent resistance 5.60 (assumed constant). (a) What is the potential difference across the headlight bulbs when they are the only load on the battery? V (b) ...
September 6, 2013 by priya

Physics... Please Help
An arrow is fired with a speed of 20.0 m/s at a block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it. During this process the arrow's deceleration has a magnitude of 1300 m/s2 and the block'...
October 14, 2009 by Robert C

chemistry
Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is 2.01 × 105 J/kg. ...
April 25, 2012 by please help

science
A stretched string has a third harmonic frequency of 600 Hz. What is the frequency of the second harmonic?
April 25, 2011 by Anonymous

science
A stretched string has a third harmonic frequency of 600 Hz. What is the frequency of the second harmonic?
April 30, 2011 by Anonymous

Physics
After a long class, a physics teacher stretches out for a nap on a bed of nails. How is this possible? I have done that demo many times. One, make certain the nails are not sharp. Secondly, make certain there are many of them. I did them on 1in by 1in grids. Pressure= weight/(...
May 10, 2007 by Anonymous

physics
A 715 kg object is lifted from the surface of the earth to a height of 880 kg above the surface of the earth. Calculate the increase in gravitational potential energy using the exact expression and compare it with the approximate expression using g=9.81. Give the magnitude of ...
October 8, 2010 by jess

drivers ed
I have to do a project and its for my drivers ed class. I chose to do Cell Phones and Driving. I need website sources but when I search for them I keep getting a bunch of articles talking about how that certain state or city has a new law banning cell phone useage and teens. I...
March 3, 2008 by james

Algebra
Unicycling. In 2005, Ken Looi of New Zealand set a record by covering 235.3 mi in 24 hr on his unicycle. After 8 hr, he was approximately twice as far from the finish line as he was from the start. How far had he traveled?
January 30, 2013 by theresa

Chemistry
2. Aluminum metal reacts with zinc(II) ion in an aqueous solution by the following half-cell reactions: Al(s) → Al3+(aq) + 3e− Zn2+(aq) + 2e− → Zn(s) a. Predict the potential of the cell under standard conditions. (4 points) b. Predict whether the ...
October 22, 2014 by Morgan

Chemistry
Based on the balanced equation Al2S3 + 6H2O → 2Al(OH)3 + 3H2S calculate the number of excess reagent units remaining when 4 Al2S3 formula units and 30 H2O molecules react? Molar Mass (g/mol) Al2S3 150.16 H2O 18.015 Al(OH)3 75.361 H2S 34.082 Avogadro's No. 6.022×1023 mol-1
February 20, 2009 by SIMON

science
multiple select Select all of the items that are true about a sample of water vapor at 101°C as it cools. 1) Its temperature will fall continuously until it condensed into a liquid. 2) Its temperature will fall steadily until reaching 100°C. 3) The molecules of water gain ...
November 17, 2010 by danny

marketing
Please refer to the following advantages and disadvantages: Advantages Little capital outlay Some control of operations Risks are shared and limited Local knowledge Disadvantages/Potential problems Limited contact with customers No direct control of operations Profits must be ...
March 17, 2011 by Trina

physics
A block of mass m is pushed along a horizontal table by a force f=70 N at an angle 55 degrees with the horizontal. Yhe coefficient of kinetic friction is 0.3 Find the normal force. My work: I know that there is 3 forces present: force of gravity, normal and applied. I think ...
October 20, 2014 by Mike

essay
In some countries such as AUSTRALIA, citizens are required BY LAW to vote in a national election.If they are over 18-years-old they must be registerd to vote and if they fail to go to their polling place on election day, they may be subject to a fine. And the quetion is ...
September 25, 2008 by lola

physics
A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?
October 31, 2012 by Alyssa

physics
A wagon is pulled by a handle making an upward angle of 25° with a force of 25 N. What is the horizontal force pulling the wagon foward? What is the force lifting the wagon off the road?
November 3, 2012 by Alyssa

Physics
A car drives at 15 m/s and has an air resistance force of 277 N. What is the air resistance force at 30 m/s? A truck drives at 9.7 m/s and has an air resistance force of 380 N. What is the air resistance force at 32 m/s? A 85.0 kg skydiver is falling at a constant speed of 32....
October 4, 2014 by Becky

SCI 275
To function, ecosystems require an input of energy. Where does this energy come from?
November 14, 2007 by dawn

SCI 275
To function, ecosystems require an input of energy. Where does this energy come from?
November 15, 2007 by dawn

Biology
A body uses up all of its energy. is there more energy released or less? Why?
September 17, 2009 by Chris

electrical
Energy exists in different forms. Name two kinds of energy
October 31, 2009 by john

biology
In every energy transactions, some of the energy is also lost as heat.
April 16, 2011 by clarissa

chemistry
If you add heat energy to water molecules i the form of ice,where does the energy go?
April 19, 2011 by Anonymous

CHEM, HELP!!
1. If the energy of a photon is 1.32 × 10^-18 J, what is its wavelength in nm? 2. The energy of an electron in the hydrogen atom is determined by what?
October 5, 2014 by Benjamin

Science
having wayyy tooo much trouble with this simple assignment. Is there a lab that proves that the light reactions must occur prior to the dark reactions in photosynthesis? So far, I thought of the experiment in which one plant is placed in direct sunlight and the other is ...
January 3, 2008 by Carmen

physics
You’re sanding a table. You must exert a force of 23 N on the sandpaper to keep it moving steadily across the table’s surface. You slide the paper back and forth for 23 minutes, during which time you move it 1090 m. How much work have you done?
February 10, 2011 by olga

Physics
Please help. Thanks. 1. Volt meter measures the potential between two large parallel plates to be 60 volts. The plates are 3cm apart. Find the magnitude of the electric field between them. 2. What work is done when 5C is raised potential by 12.45 volts? * I really don't have ...
July 5, 2012 by Jezrell

Physics
Please help. Thanks. 1. Volt meter measures the potential between two large parallel plates to be 60 volts. The plates are 3cm apart. Find the magnitude of the electric field between them. 2. What work is done when 5C is raised potential by 12.45 volts? * I really don't have ...
July 5, 2012 by Jezrell

physics
The Weistin Stamford Hotel in Detroit is 228 m tall. Suppose a piece of ice which initially has a temperature of o degrees celcius falls from the hotel roof and crashes to the ground. Assuming that 50% of the ices mechanical energy during the fall and collision is absorbed by ...
May 17, 2009 by bob

physics
A 64 kg hiker climbs to the top of a 3700 m-high mountain. The climb is made in 5.5 h starting at an elevation of 2900 m. Calculate the average power output in watts. Calculate the average power output in horsepower & Calculate assuming the body is 14% efficient, what rate of ...
October 10, 2010 by mike

Enligh
I am writing an argument paper on school uniforms and I had prepare an outline. Let me know what needs work. Thanks! I. School uniforms should be required in all public schools because not only do they cut down on the teasing and bullying but they also help students have a ...
October 2, 2010 by Taylin

English
I selected the five questions I was truly unsure of. 1) Can you change this 100-Euro note into two 50-Euro notes, please? 2) I was last in the hospital when I had my tonsils/appendicitis/ adenoids out (or removed?) /when I was operated on my knee/when I had a hernia operation...
May 23, 2011 by Henry1

physics,
A 4.0kg object is supported by an aluminum wire of length 2.5 m and diameter 1.8 mm How much will the wire stretch? I need the breakdown of how this is being solved so I can figure it out in the future. Even just a formula will do
April 12, 2011 by Dorian

physics
When an electron moves from A to B along an electric field line in Fig. 24-29, the electric field does 3.66 x 10-19 J of work on it. What are the electric potential differences (a)VB - VA, (b)VC - VA, and (c)VC - VB? in the picture there r four field lines going from down to ...
April 15, 2009 by sweety

General Chemistry
"How would you prepare 150. mL of 0.1M sodium hydroxide given a stock solution of 3.0M NaOH?" I made calculations and figured the process would be to dilute 5 mL of the 3.0M NaOH to 150. mL. Is this correct? For the ideal 150. mL of 0.1M NaOH, I calculated there to need .015 ...
April 21, 2013 by Emily

U.S. and Global economics; involving math problems
I've been working on this problem for "hours" and I can't quite figure out how to solve it; can anyone help plzzz? I would appreciate it. :) Two college students went on spring break to Guadalajara, Mexico. One took the vacation in 2002, while the other went in 2006. Each ...
November 11, 2013 by Mary

Physics
A 279 N force is pulling an 75.9-kg refrigerator across a horizontal surface. The force acts at an angle of 26.3 ° above the surface. The coefficient of kinetic friction is 0.259, and the refrigerator moves a distance of 9.14 m. Find (a) the work done by the pulling force, and...
February 27, 2012 by Candy

Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
January 13, 2013 by I'm going to die please help

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