Friday
April 18, 2014

Search: A 10 {\rm g} particle has the potential energy shown in the figure .How much work does the force do as the particle moves from x=2\;{\rm cm} to x=6\;{\rm cm}?

Number of results: 93,080

physics
A force is given by Fx=Ax^-3, where A=8.0 N*m^3.(a) For positive values of x,does the potential energy associated with this force increase or decrease with increasing x?(You can determine the answer to this question by imagining what happens to a particle that is placed at ...
Wednesday, October 28, 2009 at 1:56pm by Randy

Chemistry
What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The normal boiling ...
Tuesday, February 4, 2014 at 11:07am by Ren

Physics
We need to know its mass. Rearth = 6.380*10^6 meters Rorbit = 12.380*10^6 meters gain in potential energy + kinetic energy Potential: +G M m/rearth - G M m/rorbit = gain in potential energy Kinetic G M m/rorbit^2 = m V^2/rorbit V^2 = G M/rorbit Ke = (1/2) m V^2 add potential ...
Sunday, February 16, 2014 at 4:46am by Damon

Physics
A 250 g object attached to a spring oscillates on a frictionless horizontal table with the frequency of 4 Hz and an amplitude of 20 cm. Calculate a) maximum potential energy of the system b) the displacement of the object when the potential energy is one-half of the maximum c...
Monday, January 21, 2013 at 7:28pm by Rose

Physics
please check: Which of the following energy forms is associated with an object in motion? a. potential energy b. elastic potential energy c. nonmechanical energy d. kinetic energy i think its B Which of the following energy forms is associated with an object due to its ...
Monday, February 9, 2009 at 5:34pm by y912f

physics
An alpha particle, the nucleus of a helium atom, is at rest at the origin of a Cartesian coordinate system. A proton is moving with a velocity of v towards the alpha particle from the positive x axis direction. If the proton is initially far enough away to have no potential ...
Monday, September 29, 2008 at 1:15am by alexis

Physics - Potential difference (check + help)
Your equation is correct. You do not provide any dimensions to go with your number. I would mark it incorrect for that reason alone. Also, I assume that they are asking for a potential difference (energy per charge in Volts or J/C, not a potential energy. They are not the same...
Wednesday, October 13, 2010 at 5:15am by drwls

chem
Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C.
Thursday, June 10, 2010 at 5:10pm by andy

chemistry
Calculate the specific heat (\rm{J/g \; ^\circ C}) for a 18.5-\rm g sample of tin that absorbs 183 {\rm J} when temperature increases from 35.0 ^\circ \rm C to 78.6 ^\circ \rm C
Sunday, September 12, 2010 at 12:21am by bob

Chem104
Calculate the specific heat \((\rm{J/g \; ^\circ C})\) for a 18.5-\(\rm g\) sample of tin that absorbs 183 \({\rm J}\) when temperature increases from 35.0 \(^\circ \rm C\) to 78.6 \(^\circ \rm C\).
Saturday, October 12, 2013 at 6:07pm by Thobile

Chemistry
A lactic acid/lactate ion buffer solution contains 0.23 \it M \rm HC_3H_5O_3 and 0.65 \it M \rm C_3H_5O_3{}^-, respectively. The K_{\rm a} value of lactic acid is 1.4\times 10^{-4}. Calculate the \rm pH of this buffer.
Saturday, June 5, 2010 at 1:00pm by Karen

college physics
Calculate the potential which is energy per unit charge (voltage) .0131 meters from a wire of charge density s. (assuming voltage 0 at infinity) Then calculate the voltage .0271 meters away. change in potential energy of the particle in moving is the charge times the change in...
Wednesday, January 27, 2010 at 5:58pm by Damon

Physics
Find the potential energy given to the object when the rope is pulled to the side. This is just the height difference. The new distance from the ceiling is 1.5m * sin(35). The original distance was just the rope length (1.5m). Use mgh for the potential energy gained. Now, at ...
Thursday, January 3, 2008 at 10:48pm by Quidditch

chemistry
Write formulas for the compounds that form from {\rm Rb} and each of the following polyatomic ion: {\rm NO}_{3}^{-}, {\rm SO}_{4}^{2-}, {\rm PO}_{4}^{3-}.
Monday, September 13, 2010 at 3:11pm by Anonymous

chemistry
If Tums is added to 55.0 {\rm mL} of 0.750 {\rm M}{\rm HCl}, how many grams of {\rm CO}_{2} gas are produced?
Saturday, April 23, 2011 at 5:42pm by Ivy

Physics
A particle is moving along the x-axis subject to the potential energy function U(x) = a(1/x) + bx2 + cx d, where a = 6.00 J m, b = 26.0 J/m2, c = 3.00 J/m, and d = 26.0 J. Determine the x-component of the net force on the particle at the coordinate x = 3.37 m. Not sure what ...
Wednesday, February 27, 2013 at 9:01pm by Thomas

Physics
The motion of a particle connected to a spring is described by x= 10sin(πt + π/3). At what time (in s) is the potential energy equal to the kinetic energy?
Monday, December 19, 2011 at 7:36pm by Maxium

john tyler
Base on the law of conservation of energy, energy cannot be created nor destroyed. Knowing this, potential energy=kinetic energy. Find the potential energy. PE=mgh m=mass, g=gravity, h=height
Thursday, December 9, 2010 at 8:16pm by TutorCat

Physics
A positive and a negative charge are separated a distance r. What can we say about the electric potential energy of this two-particle system, according to our normal definitions of potential energy and work? Select the best answer. a. It is positive b. It is negative c. It is ...
Sunday, February 10, 2013 at 8:38pm by Youssef

Physics Help!!
Suppose the kinetic energy of an object moving is 15 J and the potential energy is 25 J at some point in time. Then I measure the potential energy some time later and find it to be 10 J. What is the new kinetic energy?
Friday, October 8, 2010 at 12:54pm by Liz

Preap Physics!!
There are several types of potential energy - spring potential energy, chemical potential energy, etc.
Tuesday, January 11, 2011 at 8:04pm by Marth

physics
You can compute the potential energy change (a decrease) using the Coulomb force, and this will equal the total kinetic energy increase. To get the time required for specific separation, you need to know the masses of each particle.
Monday, February 6, 2012 at 6:04am by drwls

Physics
A baseball is hit with a speed of 29.0{\rm m/s} at an angle of 44.0{\rm ^\circ} . It lands on the flat roof of a 10.0{\rm m} -tall nearby building. If the ball was hit when it was 1.4{\rm m} above the ground, what horizontal distance does it travel before it lands on the ...
Thursday, January 31, 2013 at 5:09pm by Anonymous

Physics
I need help with b... I found that k=.750880 for part a but I can't figure out what y would be to get potential energy. A 52 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 0.8 * sin( 3.8 * t ) where y is measured in ...
Saturday, December 4, 2010 at 9:48pm by Anonymous

Chemistry
In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of the solution in the ...
Sunday, June 17, 2012 at 1:35pm by Ali

physics
A charged particle of mass 8.3910−4 kg starts from rest and accelerates through a potential difference of +25,000 V to reach a speed of 1170 m/s. What is the charge on this particle?
Thursday, November 14, 2013 at 1:38pm by linda

chemistry
A 337-\rm mL sample of unknown \rm HCl solution reacts completely with \rm Na_2CO_3 to form 17.1g \rm CO_2. What was the concentration of the \rm HCl solution?
Sunday, April 7, 2013 at 7:48pm by Lauren

physical science
A smoke particle undergoing Brownian motion in air has a mass of 2.00 x 10 -5 kg. a) what is the its average velocity if the temperature is 300 K? b) what is its average kinetic energy? The average kinetic energy of a particle or molecule of any mass is Eav = (3/2) k T where k...
Friday, June 22, 2007 at 8:27pm by jan

Physics-potential energy
In a classic model, the electron of a hydrogen atom circles the proton at a radius of 0.052910−9m when it is in the n=1 state. What is its electric potential energy?
Wednesday, November 3, 2010 at 3:25pm by Kristy

Physics
Which of the followning equations shows the relationship between the potential energy and height? Explain how you know. potential energy=m(height)+b potential energy=a(height)^2 +b(height)+c potential energy=a/height
Monday, November 2, 2009 at 8:07pm by Willie

College Physics
A 22.9-kg child is on a swing attached to ropes that are L = 1.33 m long. Take the zero of the gravitational potential energy to be at the position of the child when the ropes are horizontal. Part A)The child's gravitational potential energy when the child is at the lowest ...
Sunday, February 20, 2011 at 5:21pm by Emma

Physics
How do you get the velocity of a particle given a potential energy diagram and its mass?
Wednesday, November 2, 2011 at 8:23pm by Me

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
Saturday, July 14, 2012 at 10:14am by aa

uni physics
A balloon of radius 30.0 cm is sprayed with a metallic coating so that the surface is conducting. A charge of 8.8510−8 C is placed on the surface. What is the potential on the balloon's surface? 2.6510^3 V Suppose that the some air is let out of the balloon, so that ...
Wednesday, September 25, 2013 at 2:00pm by Aman

chemistry
nitroglycerin (used medically as a vasodilator to treat heart conditions): {\rm C} 15.87\% {\rm H} 2.22\% {\rm N} 18.50\% {\rm O} 63.41\%.
Friday, September 24, 2010 at 5:03pm by Anonymous

Physics 30
A particle accelerated by a potential difference enters a velocity selector. The particle travels staright when the magnetic field is 0.400 T and the electric field is 6.30 x 10^5 V/m. Once the electric field is turned off, a sensor determines that the radius or the particle's...
Sunday, May 23, 2010 at 12:18am by Farah

Physics 30
I need to know the signs. If you are pushing the test charge up then the potential energy goes up. Work = force * distance = increase in energy = 6*10^-7 * 2* 10^-2 = 12 * 10^-9 = 1.2 * 10^-8 Joules Voltage change = energy change / charge = 1.2 * 10^-8 / 5 * 10*-6 = .24 *10^-2...
Saturday, May 19, 2012 at 2:49pm by Damon

physics
work done = force * distance = change in energy Work = Q E d 9.69095*10^-19 = Q (200) (1.7*10^-2) Q is positive because its potential energy decreases as it moves with the field (the field pushes it down the potential).
Tuesday, February 16, 2010 at 6:16pm by Damon

physics kinetic energy
a) if a particle's speed decreases by a factor of four, by what factor does its kinetic energy change? b) particle A has three times the mass and twice the kinetic energy of particle B. What is the speed ratio VA / VB?
Friday, October 31, 2008 at 2:36am by joyce

physics-help please........
The momentum and the kinetic energy of particle A is eight times and nine times the momentum and the kinetic energy of particle B, respectively. What is the ratio of the mass of particle A to that of particle B?
Sunday, October 30, 2011 at 12:03am by lost

chemistry
If 1.00 {\rm mol} of {\rm{N}}_2 has a volume of 47.0 {\rm L} under the reaction conditions, how many liters of gas can be formed by heating 38.5 g of {\rm{NaN}}_3
Thursday, September 30, 2010 at 9:56pm by Anonymous

College Physics 121
Consider the formula for the potential energy of a stretched or compressed spring. P.E. = (1/2) k X^2 The work required equals the potential energy increase. In your case the amount of stretching is X=0.10 meter
Sunday, July 18, 2010 at 12:15am by drwls

chem
Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same as for the blood, ...
Monday, April 11, 2011 at 11:56pm by Anonymous777

chem
Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same as for the blood, ...
Monday, April 11, 2011 at 11:58pm by Anonymous100

Physics
well, centripetal force= gravityforce from Earth-Gravityforce from Moon mV^2/Rs=GMem/Rs^2 -GMm*m/(Rm-Rs)^2 where Rs is the orbital distance from earth, Rm is the moon orbital distance. Now, change to period: 2PI*Rs/Period= V (2PI)^2*Rs/Period^2=GMe/Rs^2-GMm/(Rm-Rs)^2 Lets ...
Saturday, May 7, 2011 at 5:18pm by bobpursley

11th grade
Set potential energy equal to potential energy. i.e. mgh = (1/2)mv^2 where m=mass, g=gravity or 9.8m/s^2, h=height, v=velocity In the beginning, the diver has potential energy (since the person is raised at a certain distance above ground level). As the diver falls, this ...
Sunday, October 17, 2010 at 11:51pm by TutorCat

physics!-concervation of energy equations
wait...if this is conservation of energy, better to use: convert the potential energy into kinetic energy! (sorry). potential energy is mgh, and kinetic enery is (1/2)m*v^2
Thursday, December 4, 2008 at 9:33pm by DanH

science
It has kinetic energy when the CD is turning. Its potential energy depends upon its elevation. Asking "where" the energy is doesn't make a lot of sense. The kinetic energy is in any part that moves, and the potential energy is in all parts of the player.
Monday, May 11, 2009 at 12:13am by drwls

physics
please check my answers what are the SI units for momentum? kg*m/s which of the following is not involved in hitting a tennis ball? a. kinetic energy b. chemical potential energy c. gravitational potential energy d. elastic potential energy i picked B How much power is ...
Monday, February 16, 2009 at 8:35pm by y912f

Physics
Energy required = (pushoff time) * (power) Get the energy required from the potential energy change. This will be the last time I help you when no work is shown on your part.
Monday, November 30, 2009 at 2:15pm by drwls

Earth Science
1. Is it true that since energy cannot be created nor destroyed, the total energy of the river system remains constant? 2. What is the source of energy that powers the water cycle? a. sunlight insolation b. kinetic energy c. radioactive decay d. gravitational potential energy ...
Monday, November 24, 2008 at 1:08pm by John

Preap Physics!!
Is gravitational potential energy different from potential energy?? Because I know gravitational potential energy's equation is PE=mass(gravity)(height)
Tuesday, January 11, 2011 at 8:04pm by Jaeka

physics
a) mass*gravity*height= gravitational potential energy. 17*103*9.8= x Joules b) as the object falls the potential energy is converted to kinetic. so just before it hits the ground all of the potential energy has become kinetic.
Friday, May 11, 2012 at 7:53pm by Jay

Physics
In a mechanical experiment with an isolated object, only Ekin and Epot of the object change. If the object accelerates from 5 m/s to 10 m/s, its potential energy has? My ans: Potential energy has decreased by a factor of 2 because kinetic energy has increased by a factor of 2?
Tuesday, November 17, 2009 at 11:51am by Nikita

Physics
yes, down .195 meters at start up .39 meters at end so moves up .39 + .195 = .585 m work done by engine = 240*.585 = 140.4 J so increase in potential energy due to gravity = m g h = 11.3*9.8*.585 = 64.8 J decrease in potential energy as spring expands from -.195 to 0 = .5*570...
Wednesday, February 23, 2011 at 1:33am by Damon

Physics
Total energy during the fall is constant. Thus loos of potential energy = gain in kinetic energy m g h = (1/2) m v^2 so v = sqrt (2 gh) Force * distance = energy Here the energy is m g h, the loss of potential energy during the fall.
Saturday, March 9, 2013 at 3:23am by Damon

Physics
A 5.0 C point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (C = 1.0 106 Vq=energy so delta V must be 10 volts. What do I do NOW?
Saturday, May 19, 2012 at 3:06pm by Pat

physics
Particle 1 and particle 2 have masses of m1 = 1.510-8 kg and m2 = 6.210-8 kg, but they carry the same charge q. The two particles accelerate from rest through the same electric potential difference V and enter the same magnetic field, which has a magnitude B. The particles ...
Wednesday, December 5, 2012 at 4:35pm by Anonymous

chemistry
Calculate [\rm H_3O^+] given [\rm OH^-] in each of the following aqueous solutions. [\rm OH^-] = 7.110^11M What calculations do I make from this point? I have plugged in the 7.110^11M into the calculator but am getting the answer wrong every time and do not understand why. ...
Sunday, December 16, 2012 at 8:24pm by jennifer andersen

Physics
Help, I know the answer is 4.8 X 10^-19, but I can not figure out how to do it or what formula to use. The question is "A charge moves a distance of 1.7 cm in the direction of a uniform electric field whose magnitude is 220 N/C. As the charge moves, its electrical potential ...
Tuesday, May 22, 2012 at 5:50pm by Lisa

Chemistry
Kinetic energy = 1/2 mv^2 where m is the mass of the particle and v is the velocity of the particle. A joule is the SI unit for energy and is kg.m^2/s^2. Find the energy in joules of a 56.7 g mass moving at the speed of 70. km. hr.
Monday, November 5, 2012 at 11:52pm by Lina

physics
Stretching the spring 10 cm casues it to have a spring potential energy equal to the gravitational potential energy loss. (1/2) k*(0.10m)^2 = M g H = 1.0*9.8*0.7 = 6.86 J Solve for k 0.7 m (70 cm) is the actual distance it has fallen at maximum compression. 0.10 m is the ...
Wednesday, November 24, 2010 at 12:22am by drwls

chemistry
assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water is 0.0 ^\circ {\rm C} and K_f is equal to 1.86 ^\circ {\rm C}/m.
Monday, February 6, 2012 at 8:25pm by a

physics
6. A charged particle remains stationary in an upwardly directed E field between two parallel charged plates separated by 2 cm. Compute the potential difference V between the plates if the particle has a mass of 4 x 10-13 kg and a charge of +2.4 x 10-18 C.
Friday, March 4, 2011 at 1:55pm by ike

math
Calculate the mass percent ({\rm m}/{\rm m}) for the solute in each of the following solutions: 95g of {\rm NaOH} in 365g of {\rm NaOH} solution
Wednesday, October 24, 2012 at 11:03pm by hayleyg

Physics
An object with mass 0.250 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.0010−2 J. What is the amplitude of oscillation? What is...
Sunday, April 3, 2011 at 2:35pm by Jake

physic
Say you have an electron at the origin. The electron has potential energy. The space between the electron and infinity has no potential energy if it has no charge because potential energy is charge TIMES potential. The empty space does have potential though because there is an...
Thursday, July 15, 2010 at 5:30pm by Damon

physics
F = G m Me/r^2 potential energy relative to zero at infinity = -G m Me/r here r = 84600 miles convert that to meters then potential energy lost = Kinetic energy gained G m Me/r = (1/2)m v^2 so v^2 = 2 G Me/r for part b you need m diameter = 2*10^3 so diameter/2 = radius = 1,...
Monday, May 31, 2010 at 1:06pm by Damon

physics
In an 8.00 {\rm km} race, one runner runs at a steady 12.0 {\rm km}/{\rm h} and another runs at 14.0 {\rm km}/{\rm h}.
Thursday, October 13, 2011 at 9:29pm by Anonymous

physics
Two particles, with identical positive charges and a separation of 2.60 x 10^-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1 whose magnitude is 4.60 x 10^3 m/s^2, while particle 2 has an acceleration a 2 whose magnitude is 8.50 x ...
Monday, April 26, 2010 at 11:27am by kim

physics
The potential energy of a particle on the x-axis is given by U+ 8xe ^-xsquared/19 where x is 1 meter and U is in Joules. Please find the point on the x-axis for which the potential is a maximum or minimum. I've worked it three times and I get these three answers. Which one is ...
Monday, November 23, 2009 at 11:07pm by Ashley

ap physics
When the man stopped at the bottom he had minimal potential energy and no kinetic energy. He had gone down 9.5 meters so the total energy he lost was m g h = 650*9.8*9.5 The net is also not moving then so all that potential the man had went into potential energy of the net. ...
Sunday, March 25, 2012 at 2:26pm by Damon

chem
If you used the 8900 kilojoules you expend in energy in one day to heat 46000 {\rm g} of water at 25^\circ {\rm C}, what would be the rise in temperature?
Wednesday, September 14, 2011 at 6:21pm by Anonymous

Physics
Use conservation of energy. The loss of gravitational potential energy will equal the potential energy stored in the spring. 0.05 kg * 9.8 m/s^2 * 2 meters = (1/2) k X^2 X^2 = 0.014m^2 X = 0.12 m I have neglected the gravitational potential energy change during the small ...
Monday, March 16, 2009 at 11:48pm by drwls

chemistry
Three solutions are mixed together to form a single solution. One contains 0.2 mol \rm mol Pb(CH 3 COO) 2 \rm Pb(CH_3COO)_2, the second contains 0.1 mol \rm mol Na 2 S \rm Na_2S, and the third contains 0.1 mol \rm mol CaCl 2 \rm CaCl_2. Write the precipitation reaction.
Saturday, October 19, 2013 at 11:55am by cc

Physics
A force of magnitude 7.50 {\rm N} pushes three boxes with masses m_1 = 1.30\,{\rm{kg}},m_2 = 3.20\,{\rm{kg}}, and m_3 = 4.90\,{\rm{kg}}, as shown in the figure(Figure 1) . (Ignore friction.) Find the magnitude of the contact force between boxes 1 and 2, and Find the magnitude ...
Saturday, February 16, 2013 at 5:54pm by Adnan

physics
Use the potential energy and momentum. mommentum = mass times velocity So 2kg x 60m/s Take that answer and set it equal to the formula for potential energy. This works because when the rocks velocity is zero all the energy will be converted from kinetic energy to potential ...
Saturday, March 23, 2013 at 10:02pm by Jared

oscillation
An object with mass 0.250 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.0010−2 J. What is the amplitude of oscillation? What is...
Thursday, April 15, 2010 at 3:33pm by Tyler

Physics please clarify
The potential at location A is 379 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 789 V, and when released from rest from this spot, the particle arrives at B with twice the speed it ...
Saturday, September 1, 2007 at 11:32pm by Mary

Physical Science
A one volt change in potential means that the potential electrostatic energy changes by one Joule per Coulomb. Since you would be pushing the charge against the field, and expend 10 J, the voltage would be 10 Volts higher. That 10 J will be converted to kinetic energy if the ...
Wednesday, September 9, 2009 at 6:36pm by drwls

Physics
The potential at location A is 379 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 789 V, and when released from rest from this spot, the particle arrives at B with twice the speed it ...
Sunday, September 2, 2007 at 9:11am by Mary

Physics
The potential at location A is 370 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 790 V, and when released from rest from this spot, the particle arrives at B with twice the speed it ...
Tuesday, September 25, 2007 at 12:14am by Mary

phy
A major-league catcher gloves a 92 {\rm mi}/{\rm h} pitch and brings it to rest in 0.15 {\rm m}. 1-If the force exerted by the catcher is 803 {\rm N}, what is the mass of the ball?
Saturday, July 16, 2011 at 11:36pm by ivan

physics
For a given mass, the potential energy varies directly with the vertical ht. If the ver. ht is reduced by one-half, the potential energy will be reduced by 1/2. When the bottom of the incline is reached, the potential energy will be zero. PE = mgh.
Thursday, April 5, 2012 at 12:53am by Henry

Physics
An -particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.16 106 V and then enters a uniform magnetic field whose magnitude is 3.00 T. The -particle moves perpendicular to the magnetic field...
Monday, March 25, 2013 at 2:02pm by Don

Physics help!!!!!!
A 5.0 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.2 10-12 N. What is the gravitational potential energy of the two-particle system? a) A 5.0 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.2 10...
Sunday, January 14, 2007 at 8:07pm by Jessy

Physics
Use a conservation of energy approach, and include the rotational kinetic energy of the pulley, KEr KEr = (1/2)I w^2 = (1/4) m V^2 The radius of the pulley will cancel out. m is the mass of the pulley. potential enegy change = (1/2)[m1 + m2 + (m/2)] *V^2 I would need to see ...
Monday, March 8, 2010 at 10:28pm by drwls

special relativity
A photon of energy E collides with a stationary particle of rest mass m0 and is absorbed by it. what is the velocity of the resulting composite particle ? what is the mass of the resulting composite particle? (use conservation of momentum and energy)
Tuesday, June 7, 2011 at 2:21pm by Deforest

Physics
An alpha particle, initially moving at a speed of 7.10x10^5m/s, goes through a potential difference of 2500V. Determine the final speed of the alpha particle. Answer: 8.64 x 10^5
Tuesday, April 3, 2012 at 10:42pm by Sarah

Physics
it says to use conservation of energy we know conservation of energy when not dealing with heat is u+k=u+k where u is the potential energy and k is you kinetic energy. potential energy is mass x gravity x height. kinetic energy is (1/2)(mass)(velocity)^2. from there you get ...
Monday, November 15, 2010 at 11:57pm by jc

physics
A uniform stick 1.5 m long with a total mass of 210 g is pivoted at its center. A 3.9-{\rm g} bullet is shot through the stick midway between the pivot and one end The bullet approaches at 250 {\rm{ m}}/{\rm{s}} and leaves at 140 {\rm{ m}}/{\rm{s}}. With what angular speed is ...
Tuesday, April 26, 2011 at 8:24pm by Anonymous

chemistry
Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and calculate its density. To save time, you can ...
Wednesday, September 21, 2011 at 9:07pm by fatimah

Science
A ball has a potential energy of 180 J and a kinetic energy of 0 J. After falling 2m, it has a potential energy of 135J. What is its kinetic energy at this point? PLEASE ANSWER THIS I'M STUCK!
Thursday, January 19, 2012 at 9:07pm by Micheal

7th grade
Energy is the ability to do work. The two main types are kinetic energy (the energy of motion) and potential energy (stored energy). Anything moving (relative to you) has energy because it has kinetic energy. But things that are not moving (relative to you) can also have ...
Wednesday, April 15, 2009 at 7:05pm by RickP

Physics
Hi, i need help on the following questions. Thank you. 1) The potential at location A is 441 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 805 V, and when released from rest from this spot...
Tuesday, September 19, 2006 at 11:49pm by Kevin

physics
During a lighting discharge, 30C of charge move through a potential difference of 1.0 X 10^8V in 2.0X10^-2s. The energy released by this lighting bolt is: a)1.5 X 10^11 J b) 3.0 X 10^9 J c) 6.0 X 10^7 J d) 3.3 X 10^6 J e) 1500 J Ok I am not really sure what equation to use for...
Monday, March 12, 2007 at 6:35pm by susane

physics
What does it mean to say the Coulomb Force is a conservative force? This is what I have compiled, but I still feel like I'm missing something. A conservative force is one in which energy cannot be created nor destroyed, and with the property that the work done in moving a ...
Monday, July 23, 2012 at 11:56am by Coty

fau
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s.
Tuesday, June 8, 2010 at 7:10pm by nathalie

chem
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s.
Wednesday, November 2, 2011 at 9:53pm by Lindsay

Physics help
A particle moving along the y-axis has the potential eneryg function U = 6 * y3 J where y is in m. What is the y-component of the force on the particle at 0 m? What is the y-component of the force on the particle at 9 m? What is the y-component of the force on the particle at ...
Wednesday, November 9, 2011 at 9:45pm by Me

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members