Saturday
February 13, 2016

Number of results: 114,115

Physics;Help!!!!!!
There is apparently no one online who can help with physics questions right now. Please check back later to see if a physics teacher has addressed your question. Multiple posts won't get faster answers. Thanks. =) The question is in the first question marked physics beside ...
June 7, 2007 by Writeacher

November 16, 2011 by Meron

a block of mass 2.50 kg rests on a ramp. if the coefficient of static friction between the block and ramp is 0.350, what maximum angle can the ramp make with the horizontal before the block starts to slip down?
February 15, 2011 by JayCee

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

I posted this earler and you gave me help, could you please check what I did? Thank you If a car drives off a 40 m high cliff with a horizontal velocity of 15 m/s, how far from the base of the cliff will the car strike the ground? Could someone help with the equation, please ...
January 2, 2011 by JessieLynne

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

Physics.
I posted at around 7:44 please help me, everytime I post, no one ever helps me, or it is too late...I only ever want physics help...so please, lend a helping brain! :) (Im not trying to come off mean, Im just frustrated beyond belief)
September 27, 2007 by Cooper

physics/medical physics
please assist me to get project topic under biophysics or application of physics in medecine
August 12, 2009 by mataos

physics
A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
April 24, 2012 by Akbar

physics
A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
April 25, 2012 by Akbar

physics
Guys help with my physics please!!! Four 40-gram weights are suspended at the 13-cm 21-cm 35-cm and 74-cm marks of a uniform meter stick.if the stick is supported at the mid point what load must be suspended at the 82 cm mark to attain equilibrium please explain to me how
August 31, 2015 by Jared

science
June 1, 2015 by lizzy

Physics
Please help me with my physics homework I've been given a week and can't for the life of me work out how it is done. Tom has a rubber ball which weighs 5 kilograms and bounces 3.8 meters from a drop height of 4 meters using this information please work out the mass of the Sun.
July 6, 2012 by Jack

HELP! PHYSICS LABS!!
October 2, 2007 by Cooper-Nichol

Physics
When James applied the brakes to his car, it slows unifromly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? Answers: 6.0m 37.5 m 18.8 m 48.0m Please help-I've just started Physics last week and I'm...
September 6, 2010 by Ian

REPOST
CAN someone please give me a good idea as how to find information for this problem: we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971 version...I need help trying to...
December 8, 2007 by Please McHelp me!

physics
A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
April 26, 2012 by Akbar

*please help ily*. a fishing pole, 2m long, is pivoted at 50cm from one end. the other end has a line with a 4 kg fish on it. what is the effort force required to land the fish?

work (physics)
a 25 kg object is accelerating from rest to a distance of 6 m in 4 seconds across a level floor. The friction is 3.8 N - what is the total work........ i started off by trying to find fa but it seems to give me an absurd answer.. maybe if u could help me by telling me the ...
April 7, 2009 by marisa

Repost physics
PLEASE SOMEONE HELP ME!! I POSTED DOWN AT AROUND 10 something!! PLEASE!!! I NEED HELP!!!
September 30, 2007 by Cooper-Nichol

February 18, 2008 by Sarah

February 16, 2012 by Julie

Multiple choice please help :) Which of the following is equivalent to one ampere? 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s
May 8, 2014 by Hope

DrBob222 please check my physics question posted at 8:55pm. The subject is drwl please check. I am not getting a response from drwl. Thanks! Mary DrWLS is not on right now. My physics is too poor to trust my answers. Bob Pursley is smarter than I am; he does physics, math, and...
February 27, 2007 by Mary

physics
June 2, 2011 by lou lou

November 16, 2011 by Meron

please look at my earlier question below thank you
April 7, 2008 by Spencer

* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
April 20, 2013 by Isis

PLEASE SOMEONE RESPOND TO MY QUESTION: Physics (12)! THIS QUESTION IS DRIVING ME NUTS!!! I DID THIS 7 DIFFERENT WAYS!!! I AM SO LOST! PLEASE! I NEED THIS QUESTION FOR TOMORROW!!!! P.S. thanks so much....very much appreciated!
September 11, 2007 by Brooke

Physics Lab
Can someone please help me? I need some ideas, I am totally stuck...I posted as the same name as I am now! Please! thanks
September 14, 2007 by Meredith

* JJ Thompson * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
April 19, 2013 by Isis

* JJ Thompson * * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
April 20, 2013 by Isis

When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep ...
March 27, 2013 by Laila

Physics
How long would it take a fighter jet to accelerate from 0 to 250m/s if the force from the engine was 180000N and the mass was 10000kg ? please help please
December 4, 2011 by Anonymous

Physics
I have some physics problems that I would like to get checked please?
September 23, 2007 by Jesse

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
April 25, 2012 by Romy

physics
i need three project topics in physics. Help please
May 12, 2012 by Joanna

physics
June 5, 2012 by angelique

Could I please get some further assistance on a question I posted earlier? I'm not getting the correct answer and I'm not sure what I'm doing wrong.
April 15, 2009 by Susan

Could someone remind me how to calculate this on the TI-84 Calculator: Which buttons do I hit for this: 3 * 10^8/5.4 * 10^14 I'm inputting it and coming up with 5.55 E 21 It should come out to be 5.55 *10^-7 but I'm not doing the input correct Please help
February 8, 2011 by Leah

PHYSICS PLEASE SOMEONE HELP ME OUT
When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep ...
March 27, 2013 by Laila

physics
January 24, 2007 by Alex

Physics
I have to create a teaching aid for physics based on the principles i have learnt like gravitation , mechanical properties and many more. I am not able to find the right experiment to demonstrate infront of my teacher.Please help me deal with this by providing information ...
January 25, 2012 by confused

Physics
I have to create a teaching aid for physics based on the principles i have learnt like gravitation , mechanical properties and many more. I am not able to find the right experiment to demonstrate infront of my teacher.Please help me deal with this by providing information ...
January 26, 2012 by confused

Physics
Car A is moving at a constant speed of 10.0 m/s and passes Car B which is at rest. 10 seconds after, the latter follows with an acceleration of 0.5 m/s2. Determine the distance that the latter has to travel before it overtakes the former. does it require quadratic formula? Oh ...
August 12, 2012 by Anna

Find the velocity (in m/s) of a free-falling object released from rest after it has fallen 100m. I don't understand the formulas to use or anything. please help.
September 16, 2008 by Gray

Physics
Please give me numerically answer of tata mcgrawhill book class 10 of physics electricity total unsolved
August 4, 2011 by Abhishek kumar sahi

physics
i have given an assignment by school to prapare a working model of physics. Please give me some tips.
July 20, 2012 by edward

Two small pith balls, each of mass m = 11.2 g, are suspended from the ceiling of the physics lab by 1.7 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 30.4°, and the charges on the two balls are equal, what is the ...
June 5, 2012 by T-HUD

Physics - Help!
All, Please just help me in this, I will need you to please give me the clue-thanks. a flashlamp bulb is marked '2.5V,0.30A' and has to be operated from a dry battery of e.m.f 3.0V for the current p.d. of 2.5V to be produced across it. Why?
April 18, 2007 by Sola

I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall ...
December 7, 2010 by Joey

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
April 26, 2012 by Romy

Physics Please COULD SOMEONE HELP ME ASAP PLZ
When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep ...
March 27, 2013 by Laila

Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me out...thanks Physics...
May 8, 2013 by Leila

physics
A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
April 26, 2012 by Romy

physics
A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
April 26, 2012 by Romy

Physics
Physics Question Help please!!!? A 3.70 kg mass attached to a spring oscillates with a period of 0.375 s and an amplitude of 17.0 cm. (a) Find the total mechanical energy of the system
April 23, 2011 by Anonymous

Physics - please, I really need this
Show mathematically that a diverging lens will alway produce an upright image. [i.e. prove that hi is positive if f is negative] I'm not even sure how to start this. Can someone please help me?
December 1, 2008 by Sara

Physics
Why is acceleration the same for all free-falling objects regardless of mass and distance? Please don't say according to this formula or something. could you please actually explain the theroy behind it.
April 2, 2009 by Lena

On the surface of a planet an object is thrown vertically upward with an initial speed of 60 m/s. use a conservation of energy approach to determine the object's speed when the object is at a quarter of it's maximum height. (assume the planet has no atmosphere) PLEASE HELP. I ...
November 23, 2014 by Isabelle

At 265 K, the pressure of 0.0454 mol of an ideal gas is 1.42×105 Pa. What volume does the gas occupy? Please help!
June 22, 2012 by Teresa

Physics
PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = (10 m/s)t + (5 m/s2)t2 + (3 m/s3)t3 y(t) = (20 m/s)t - (10 m/s2)t2 + (2 m/s3)t3 where x and y are in meters and t is in seconds. What is the object's acceleration at t = 1 s? Please explain in detail how ...
September 14, 2010 by Indira

PHYSICS
A CAR ACCELERATES TO 36M/S FOR 4 SECS BEFORE DECELERATING TO 32M/S FOR THE NEXT 6 SECS. CALCULATE THE DISTANCE PLEASE PLEASE HELP
June 8, 2012 by fahd

Physics wavelength question, help please .
The energy of an X-RAY quantum of wavelength 1.0 X 10^-10 m is. its answer is 1.99 X 10^ -15, but i dont know how to solve it , thanks help please
October 2, 2014 by Shahab Mirza

Physics and movies
we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971 version...I need help trying to prove that Violets becoming a blueberry is impossible and an error due to physics, ...
December 8, 2007 by Please McHelp me!

I asked about a golf ball hit at a 35 degree angle and the hole was 175 m away. What was speed of ball. I got a response, and it follows with my response. I'm not doing something right, can you help, please.Physics - drwls, Saturday, October 9, 2010 at 10:20am You can come up ...
October 9, 2010 by Anthony

Physics-Please check if I did this correctly
I posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is ...
December 7, 2010 by Joey

NEED HELP ASAP PHYSICS@!!1
A person is flying a model airplane with mass 82.2 gram in a horizontal circular path on the end of a string 10.5 m long. The string is horizontal and exerts a force of 3.22 N on the hand of the person holding it. What is the speed (in m/s) of the plane? PLEASE PLEASE PLEASE ...
April 10, 2015 by johnny

physics
what is the perpendicular distance between two parellel rays emerging from a glass block called please give reply as tomorrow i have physics paper
September 9, 2014 by manavi

physics
if a piece of aluminum with mass 3.99g and a temperature of 100C are dropped into 10cm^3 of water at 21C, what will be the final temperature of the system? The specific heat of aluminium is .900J/gC... ok so i know that i set both equal to each other, but i was wondering do i ...
April 22, 2009 by garrick

Damon helped me with this calc but I think the answer should be -20, not -22, could someone please check the calculation If a ball is thrown into the wall at 14 m/s and comes off at 6 m/s, what is change of velocity of the ball? I think it would be 14-6 = (-8 m/s) Is that ...
January 5, 2011 by Russ

Distruive interference? Unless you put C in the line between A and B, this the asnwer is at infinity. Now on the line between A and B, the distance from A to C has to be an odd multiple of halfwavelength greater than C to B. Now, the distance between the speakers is two ...
May 4, 2007 by Papito

physics
How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface? can someone please just give me an equation to figure this out please I am lost
March 13, 2012 by jessica

Sta 112
This is my question every one . Please help me have it already I had 6 as my answer. In a class of 50 student 28,22,20 of them offer physics,chemistry and biology respectively also 4 of them offer physics and chemistry but not biology,3 offer physics and biology but not ...
January 23, 2016 by Anonymous

physics
A system consists of three particles, each of mass 2.10 g, located at the corners of an equilateral triangle with sides of 22.0 cm. Calculate the potential energy of the system. Please help me what formula to use please
March 11, 2011 by Rachel

Explain why the sum of the masses of the uranium nucleus and of the neutron does not equal the total mass of the products of the reaction. I guess its a theory question. Someone please explain!
September 12, 2014 by Ariana

Physics
I'm trying to rearange this 0 = Xo + 2^-1 a t^2 for t I've been told that it is (a^-1 2x)^(2^-1) but I do not see how please show me step by step how you get that 0 - Xo = Xo - Xo + 2^-1 a t^2 (-Xo = 2^-1 a t^2) a^-1 2 (a^-1 (2-Xo) = t^2)^(2^-1) (a^-1 (2 - Xo))^(2^-1) please ...
June 23, 2009 by Physics

A neutral nitrogen atom has 7 electrons, 7 protons, and 7 neutrons. What is its total charge? If we remove 2 of the electrons, now what is its charge? what is its charge if we add 2 electrons to the neutrol atom instead? give charge in Coloumbs.
January 20, 2013 by Anonymous

Physics
Please help. I got 338.82 for the velocity and wanted to get the distance, but I can't seem to do it because I don't have the wavelength. Please help! A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.20 s later. Find the depth of the well if...
August 4, 2008 by Elisa

PHYSICS. HELP.
A motorboat heads due west at 10 m/s. The river has a current that travels south at 6 m/s. a) what is the resultant velocity? b) If the river is 200 m wide, how long doe sit take the boat to cross the river? c) How far downstream is the boat when it reaches the other side? ...
November 4, 2008 by Kiley

Kinematics Physics
Please let me know if someone can help with this subject. I have summer school in physics because I did not get the first semester. I am still not getting it. Alyx Yes, we can help you. Post your questions, show your work, and we'll guide you in the right direction.
July 29, 2006 by Alyx

physics
January 5, 2015 by genny

physics
i need a topic for an eei (extended experimental investigation). i want a simple experiment that i can do. however, i need one that has a lot of physics behind it, and has a lot of information on the net about it. it can be on any topic within physics. if anyone has any great ...
May 19, 2007 by shamstar

physics
A mass of 5.6 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 30 Newtons. If the length of the incline is 58 meters and the mass is originally at rest at the top of the incline and then released, how long does ...
October 6, 2011 by Anonymous

PHYSICS HELP
Please check to see if these statements are right. Through the process of doing work, energy can move between the external world and the system as the result of forces. I believe this is true. Please verify. Yes, true.
January 10, 2007 by Pat

An example of the neutron absorption reaction is . 1 0 n+10 5 B-->7 3 Li+ 4 2 He The rest masses of each particle in atomic mass units (u) are 1 0 n= 1 u 10 5 B=10 u 7 3 Li =7 u 4 2 He= 4 u where 1u=1.66x10^-27 kg. calculate Q Q= in MeV I have the same question please ...
May 8, 2013 by Amy

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up
January 6, 2015 by Georgy

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up
January 6, 2015 by greoge

Physics
Hi. Can someone please help me on how to do the propagation of error in physics on variable C, d and A of the following formula: k = Cd/åA , with error on C, d, A
September 28, 2015 by NONEE

Physics
posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached...
December 7, 2010 by Joey

physics
Hi I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers
July 18, 2011 by Spencer

Physics
Hi, I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers
July 27, 2011 by Spencer

A hoodlum throws a rock straight down from the roof of a building 109m high. If it takes 2.40s to hit the ground below, with what initial speed was the rock thrown? Please show all work
December 20, 2014 by Georgy

physics
please help. a pitcher throws a .50kg ball of clay at a blck of woo. the clay sticks to the wood on impact, and thier joint velocity afterwards is 3.0m/s. what is the original speed of the clay. please help with this question
March 2, 2011 by liz

Physics - Satellites
March 25, 2008 by Tony Poon

physics
please help find the resultant of these two vectors: 2.00 * 10^2 units due east and 4.00 * 10^2 units 30.0degrees north of west please show me step by step how to do this thanks for any help!
February 13, 2009 by y912f

Physics
PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = 10t + 5t^2 + 3t^3 y(t) = 20t - 10t^2 + 2t^3 where x and y are in meters and t is in seconds. How fast is the object traveling at t = 1 s? Please explain in detail how to do this problem. Thanks
September 14, 2010 by Indira

Physics
Can someone please tell me how to calculate the standard deviation of the following values? 0.985 0.985 1.005 1.455 1.035 And please for the following numbers too 1.47 1.52 1.50 1.45 1.39
February 8, 2011 by Abi

Physics
A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...

Physics
Steel railroad tracks of length L = 18.30 m are laid at 10.0° C. How much space should be left between the track sections if they are to just touch when the temperature is T = 49.0° C? mm Please help. I have tried this L° α Δt = 18.3 * 13 10^-6 * (49 -10) = .92781cm ...
April 20, 2012 by Amy

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