Number of results: 146
Phyics
This is not phyics, whatever that is.
Saturday, October 16, 2010 at 10:08pm by bobpursley
phyics
4
Friday, September 17, 2010 at 4:17pm by thomas
Phyics
Thank You!!!!! I got it!!!!!
Sunday, February 17, 2013 at 4:50pm by Amy
phyics
.65496475
Sunday, February 28, 2010 at 8:46am by edward
phyics
x=4 12.3(4)=?
Friday, September 17, 2010 at 4:17pm by TutorCat
Phyics
Thanks a lot!
Wednesday, February 10, 2010 at 12:07am by ALan
phyics
hi i really dont know
Wednesday, February 22, 2012 at 12:12pm by Anonymous
phyics
hi i really dont know
Wednesday, February 22, 2012 at 12:12pm by Anonymous
phyics
whats the angle?
Monday, November 1, 2010 at 11:04pm by Anonymous
phyics
i dont think it 4
Friday, September 17, 2010 at 4:17pm by Ashley
phyics
.02 km/h
Tuesday, April 6, 2010 at 9:55am by Kidda
phyics
(1/2)^x=1/16 12.3x=?
Friday, September 17, 2010 at 4:17pm by TutorCat
Phyics
How is the change in entory calculated?
Wednesday, July 21, 2010 at 3:37pm by Oisin
Phyics
Thank You not sure how i did catch that lol.
Wednesday, September 16, 2009 at 3:56pm by Joshua
PHYICS
what about 13/8 0 31/15 P
Saturday, September 18, 2010 at 11:51am by Ashley
phyics
just plug in 5 for t: r = (0.020 m/s^3)(5^3)i + (2.2 m/s)(5)j - (0.060 m/s^2)(5^2) k
Thursday, September 16, 2010 at 10:55pm by TutorCat
phyics
convert 36cm/min to km/h
Tuesday, April 6, 2010 at 9:55am by alisha
PHYICS NEED HELP BAD!
IT IS NOT COMING OUT RIGHT
Wednesday, October 17, 2012 at 11:11am by Anthony
phyics-universal gravity
g is inversely prop to rad^2 g= 9.8/3.3^2
Tuesday, November 3, 2009 at 9:10pm by bobpursley
Phyics
I dont know what the second question is, you made a statement.
Friday, October 5, 2007 at 8:59pm by bobpursley
phyics help nedded
So how can we state the appropriate answer to part (a)...?
Friday, October 19, 2012 at 4:17am by some one
PHYICS
how do you get the vy by it self when trying to get tionhe speed in the y direct
Wednesday, October 17, 2012 at 12:25pm by Anthony
Phyics
vf^2=vi^2 + 2ad solve for a. Then note that a=mu*g
Monday, February 28, 2011 at 2:42pm by bobpursley
1th phyics
use the equation v=v0+at substitute the numbers in to find t
Sunday, September 26, 2010 at 6:22pm by Mat
phyics
1/16 = (1/2)^4 so four half lives 4 * 12.3 as TutorCat said
Friday, September 17, 2010 at 4:17pm by Damon
college phyics
Your expression for x(t) is fouled up. Take the derivative of x to get velocity.
Tuesday, January 19, 2010 at 7:23pm by bobpursley
phyics
Calculate (in MeV ) the binding energy per nucleon for 40 Ca .
Monday, December 5, 2011 at 12:38pm by paige
Phyics help
It appears you are posting several questions under different names. Sorry.
Saturday, April 9, 2011 at 8:27pm by bobpursley
Phyics
It is it physical science and the equations nedd to be balanced.... it just how the format is on the computer
Saturday, October 16, 2010 at 10:08pm by Tom
Phyics
The internal energy change in a system that has absorbed 4 Kcals of heat and 1000 J of work is:
Tuesday, March 12, 2013 at 11:36pm by Miko
algebra phyics word problem
No, that is all wrong. I suggest you look again at the way I did it.
Saturday, October 15, 2011 at 6:51pm by drwls
phyics
What is your question about this problem? I will be happy to critique your thinking. We are not in the habit of doing homework or tests for students.
Wednesday, October 3, 2012 at 2:10pm by bobpursley
Phyics
How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28° incline plane?
Sunday, February 17, 2013 at 4:50pm by Amy
phyics
For a given launch velocity, the smaller the angle the greater the hor. displacement Dx max occurs at 0 deg.
Wednesday, February 22, 2012 at 12:12pm by Henry
1th phyics
A car traveling at 7.5 m/s accelerates 3.4m/s2 to reach a speed of 15.0 m/s. How long does it take for this acceleration to occur?
Sunday, September 26, 2010 at 6:22pm by Taylor
Phyics help
you don't understand i don't get this unit and i'm failling this unit miserabely really need help
Saturday, April 9, 2011 at 8:27pm by deepti
Phyics help
Show your work. I will be happy to critique your work and thinking.
Saturday, April 9, 2011 at 8:27pm by bobpursley
phyics
The choroid and the auricle are similar because, one collects light and the other collects sound?
Thursday, April 23, 2009 at 11:01am by Anonymous
phyics
For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement?
Wednesday, February 22, 2012 at 12:12pm by Lauren01
phyics
yes one collects light and the other collects sound, if your doing it from a Penn Foster class
Thursday, April 23, 2009 at 11:01am by Kendra Cox
algebra phyics word problem
I'm sorry, Marko, but I never took physics and my math skills stop about middle school level.
Saturday, October 15, 2011 at 6:51pm by Ms. Sue
phyics
calculate the gravitational force between a student with mass (60kg) and her desk (5kg) if she is sitting .2m from her desk
Tuesday, February 22, 2011 at 2:31am by clayton
phyics
a SHO has a maximum speed of 5m/s. How fast will it be going when the potential energy is seven-ninths of the kinetic energy.
Saturday, November 13, 2010 at 3:44pm by brandy
PHYICS
A Football is kicked 66.6 meters in 5.39 seconds. What was the initial velocity it was kicked? magnitude and direction above horizontal
Wednesday, October 17, 2012 at 12:25pm by Anthony
phyics-universal gravity
G(Me*ms)/(2*radearth)^2 or, since you know its mass, on earth the weight would be mg, but double the distance, and it is mg/4
Tuesday, November 3, 2009 at 9:09pm by bobpursley
Phyics
Well, Newtons gravitation law is force=GMm/d^2 but for you, mass m, your acceleration by falling in gravity must be Force=ma or a=F/m= GM/d^2
Friday, October 5, 2007 at 8:59pm by bobpursley
phyics-universal gravity
A hypothetical planet has a radius 3.3 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? (downward)
Tuesday, November 3, 2009 at 9:10pm by Anonymous
PHYICS NEED HELP BAD!
A football is kicked 66.6 meters. If it is in the air for 5.39 seconds, with what initial velocity was it kicked? magnitude and direction above horizontal
Wednesday, October 17, 2012 at 11:11am by Anthony
11th phyics
An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s
Sunday, September 26, 2010 at 6:20pm by Taylor
phyics
Find the horizontal range of a baseball that leaves the bat at an angle of 63 degrees, with the horizontal with an initial velocity of 160 km/hr. discard air resistance
Wednesday, December 14, 2011 at 7:19pm by Brittany
Phyics
A ray of light strikes a mirror at an angle of 26 degrees to the normal. What is the angle of reflection? Answer in units of degrees .
Sunday, February 27, 2011 at 10:27pm by Maria
college phyics
The position of an object changes with time according to the expression x(t) = 5t62 = 3t - 1. What is the position of the object when its velocity is 11 m/s?
Tuesday, January 19, 2010 at 7:23pm by Mandy
phyics
find the acceleration if the velocity changes from: a) 2m/s to 4m/s in 4s b) 5m/s to 10m/s in 2s c) 100m/s to 120m/s in 5s d) 86m/s to 94m/s in 4s e) 21m/s to 35m/s in 18s thank you!
Wednesday, September 19, 2012 at 1:11pm by nicky
algebra phyics word problem
ok but this is in algebra mathword problem about physic
Saturday, October 15, 2011 at 6:51pm by marko
PHYICS
Pick the radioactive isotope in each set 14/7 N OR 23/13 AL EXPLAIN A)its atomic number is greater than 83 B)it has fewer n than p in the nucleus C)it is an odd-odd nuclide none of the above
Saturday, September 18, 2010 at 11:51am by Ashley
phyics
Pick the radioactive isotope in each set. 23/11 20/9 Explain your choice. a)its atomic number is greater than 83 b)it has fewer n than p in the nucleus c)it is an odd-odd nuclide none of the above
Friday, September 17, 2010 at 4:20pm by ashley
ssct
(phyics) question: calculate the final temperature of the water if 400grams of water at 80degress Celsius is poured into a 100grams pot at 30dgrees Celsius .
Thursday, December 6, 2012 at 2:50am by arjet
phyics
a 2kg mallet is dropped from a height of .6m onto a nail, driving it 3.5 cm into the wood. What is the average force exerted by the mallet on the nail? thanks
Wednesday, January 19, 2011 at 1:25pm by jinny
phyics-universal gravity
Calculate the force of gravity on a spacecraft 6400 km (1 earth radii) above the Earth's surface if its mass is 1600 kg.
Tuesday, November 3, 2009 at 9:09pm by DJ
phyics
a child playing jacks bounces a super ball on tha sdewalk. The collision is elastic. Does each object have the same kinetic energy after the collision as it did before the collision?
Wednesday, February 20, 2013 at 3:09pm by lynn
Phyics
Sue is swinging a yo-yo around her head. What happens to the size of the centripetal acceleration if the mass of the yo-yo is doubled without changing the period or length of the string?
Wednesday, October 19, 2011 at 8:43pm by Eddie
phyics (correction)
1. take the second derivative of r to find acceleration. 2. then divide 2.75 *10^5 N by 9.8m/s^2 to find how much the helicopter weighs in kg 3. multiply your result from 1 with your result from 2
Thursday, September 16, 2010 at 10:55pm by TutorCat
phyics
When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration.
Wednesday, October 3, 2012 at 2:10pm by Anonymous
phyics
A ball is placed at the top of a hill of incline 60.0 degrees. The ball is allowed to roll for 12.0 seconds. How far will the ball roll during this period? Neglect friction.
Saturday, December 18, 2010 at 4:06pm by lola
phyics
You might say that, but the choria does no really "collect" light; it provides a way for the retina to receive blood for nourishment. The retina does the "collecting" of light. The auricle (or "pinna") collects and funnels sound into the ear.
Thursday, April 23, 2009 at 11:01am by drwls
Phyics
A projectile is fired horizontally from a 39 m cliff at 30m/s . Find the speed and velocity of the projectile when it strikes the ground. Find vx Find vy Find v
Wednesday, October 12, 2011 at 5:08pm by Eman
Phyics
It slides until the. Initial kinetic energy equals the gain in potential energy. If S is the distance travelled up the ramp, (M/2)*Vo^2 = M g S sin28 S = Vo^2/(2 g sin28)
Sunday, February 17, 2013 at 4:50pm by drwls
phyics
Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following fraction of the tritium present in new brandy, how long ago was it produced? 1/16
Friday, September 17, 2010 at 4:17pm by ashley
Phyics
You have it set up correcty, except for signs. 12t-4.9t^2=18(t-1)-4.9(t-1)^2 12t-4.9t^2=18t-18-4.9(t^2-2t+1) now combine terms, and solve.
Wednesday, September 16, 2009 at 3:56pm by bobpursley
phyics
A box of mass 0.385 kg slides down a very smooth (frictionless) ramp which is inclined at an angle of 56.6° above the horizontal. What is the acceleration of the box down the ramp?
Saturday, September 22, 2012 at 6:18pm by Amy
phyics
during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?
Saturday, May 5, 2012 at 9:11pm by mikel
phyics
The position of a 2.75 *10^5 N training helicopter under test is given by r = (0.020 m/s^3)(t^3)i + (2.2 m/s)(t)j - (0.060 m/s^2)(t^2) k Find the net force on the helicopter at t =5.0s. Express your answer in terms of i,j,k. Express your coefficient using two significant figures.
Thursday, September 16, 2010 at 10:55pm by ami
Phyics
The speed has nothing to do with it. You just need to know that it is constant. That means the net force is zero. Towing force = Friction force 1047 N = M*g*μk = 427*9.8*μk Solve for μk
Saturday, October 31, 2009 at 3:31pm by drwls
phyics/moon
The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.5 m/s2 horizontally on the moon? A) 1.3 N B) 20 N C) 33 N D) 120 N E) 130 N
Monday, June 14, 2010 at 2:08pm by sam
Phyics
Balance the following equations? a) Fe(OH)2 + 2O2 + 3H2O ¨ Fe(OH)3 (b) 5Sr + 6H2O ¨ 7Sr(OH)2 + 8H2 (c) 9Al + 10Fe3O4 ¨ 11Al2O3 + 12Fe (d) 13Pb(NO3)2 ¨ 14PbO + 15NO2 + 16O2 (e) 17O2 + 18N2H4 ¨ 19H2O2 + 20N2 (f) 21C4H10 + 22O2 &#...
Saturday, October 16, 2010 at 10:08pm by Ashley
Phyics
Given: G = 6.67259 × 10−11 Nm2/kg2 The acceleration of gravity on the surface of a planet of radius R = 3430 km is 4.43 m/s2.What is the period T of a satellite in circular orbit h = 7683.2 km above the surface? Answer in units of s
Tuesday, February 7, 2012 at 5:33pm by anonymous
phyics
A mechanic pushes a(n) 3980 kg car from rest to a speed of v, doing 5107 J of work in the process. During this time, the car moves 29.3m. Neglect friction between car and road. Find the speed v. Answer in units of m/s.
Sunday, February 27, 2011 at 10:33pm by leslie
Phyics
A 715N person walks up three flights of stairs, covering a total vertical distance of 10.5(a)If as typical, only 20% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use
Friday, December 3, 2010 at 12:14am by Anonymous
phyics
acceleration is (change in velocity)/(time used) That is, keeping track of the units, acceleration(m/s^2) = velocity(m/s) / time(s) a) (4-2)m/s / 4s = 2m/s / 4s = 1/2 m/s^2 Do the others in like wise. Come on back if you get stuck, or just want confirmation of your answers.
Wednesday, September 19, 2012 at 1:11pm by Steve
PHYICS NEED HELP BAD!
NEED HELP BAD
Wednesday, October 17, 2012 at 11:11am by Anthony
11th grade
11th grade phyics
Tuesday, September 21, 2010 at 5:41pm by Taylor
phyics
Who will hear the voice of a singer first-a person in the balcony 50 m away from the stage (Fig. 22-19), or a person 2000 km away at home whose ear is next to the radio? Assume that the microphone is a few centimeters from the singer and the temperature is 20°C.
Thursday, March 17, 2011 at 11:45pm by ami
algebra phyics word problem
You must reside in the part of the world that uses a comma as a decimal point, and vice versa. The speed of sound is water is 1,117 m/s faster than it is in air. (One thousand, one hundred seventeen) If s is the speed in water, s = 344 + 1117. s = 1461 m/s
Saturday, October 15, 2011 at 6:51pm by drwls
phyics
Richard is driving home to visit his parents. 125 of the trip are on the interstate highway where the speed limit is 65 . Normally Richard drives at the speed limit, but today he is running late and decides to take his chances by driving at 72 . how do i get to my answer
Tuesday, September 11, 2012 at 1:36pm by tamika
Phyics help
ok so here's how i thought i would have to solve these: 1. W=mgh =100*9.8*2.0 or w=0 because u lift the mass upards and carry it (perpenticular ) hence w=0 2. W=f delta D W/D=Force 3. W=60N * 40cm (ordo i convert 40 cm to kg) 4. W=mgh W/h=m (do i convert 4.0 cm to kg?)
Saturday, April 9, 2011 at 8:27pm by deepti
Phyics
ΔQ =4KCal=16747.2 J ΔQ=ΔU+W ΔU=ΔQ-W =16747.2-1000=15747.2 J
Tuesday, March 12, 2013 at 11:36pm by Elena
Phyics - Astronomy
You are standing at a latitude of 35 degrees South. Star x is currently at an azimuth of 45 degrees and an altitude of 50 degrees. What is the azimuth and altitude coordinates of Star X 3 hours later? I don't know how to do this. If anyone knows how to calculate this ...
Sunday, September 11, 2011 at 9:18pm by Amanda
Phyics
A ship is first seen on a radar screen to be 13 km east of the radar site. Some time later, the ship is at 16 km northwest. What is the displacement of the ship from the first location it is seen at?
Thursday, September 9, 2010 at 3:43pm by G
Phyics
Could you please check my work, I am not too sure what do. An airplane that flies at 100 km/h with a 10 km/h tailwind travels at 110 km/h relative to the ground. If it instead flies into a 10 km/h headwind, its groundspeed is : 110 km/h /2= 55 km/h
Thursday, August 30, 2007 at 11:59am by Soly
Phyics Word Problems
The airplane problem is correct.The horse speed is 10 km/30 min which would make it 20 km/hr. That is solved as 10km/0.5hr = 20 km/hr. The problem doesn't ask for a particular unit. The third problem I will leave for others.
Monday, September 3, 2007 at 11:25pm by DrBob222
phyics (PLEASE PLEASE READ)
a model rocket rises with constant accerleration to a height of 3.2 m, at which point its speed is 26.0 m/s. (a) how much time does it take for the rocket to reach this height? (b) what was the magnitude of the rocket's acceration? (c) find the height and speed of the ...
Sunday, November 20, 2011 at 1:36pm by taylor
phyics (PLEASE PLEASE READ)
a. d1 = d2, 3.5(t+2) = 0.5*2.4t^2, 3.5t + 7 = 1.2t^2, 1.2t^2 - 3.5t - 7 = 0, t = 4.28s.(Use Quadratic Formula). b. d = d1 = d2 = 3.5(4.28+2) = 22m. c. V = Vo + at = 0 + 2.4*4.28=10.3m/s.
Sunday, November 20, 2011 at 1:37pm by Henry
phyics
A novice golfer on the green takes three strokes to sink the ball. The successive dis- placements are 5.9 m to the north, 10 m 45 north of east, and 5.9 m 26 west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole in a single ...
Thursday, November 17, 2011 at 7:28pm by robert
Phyics
A rubber ball with a radius of 4.8 cm rolls along the horizontal surface of a table with a constant linear speed v. When the ball rolls off the edge of the table, it falls 0.83 m to the floor below. If the ball completes 0.68 revolutions during its fall, what was its linear ...
Sunday, October 19, 2008 at 2:27pm by Andrew
phyics
on a warm day(92 degrees F) an air filled balloon occupies a volume of .20m^3 and is under a pressure of 20.0 lbs/in^2. if the baloon is cooled to 32 degrees F in a refigerator while its pressure is reduced to 14.7 lb/in wat is the volume on the air in the container? (assume ...
Sunday, February 28, 2010 at 8:46am by Standard C.
algebra phyics word problem
sorry i mistyped so can i write it out like this: s - 1,117 344 s - 1,117 + 1,117 = 344 + 1,117 s-0 = 1461 s=1,461 check; s - 1117 = 344 1461 - 1117 = 344
Saturday, October 15, 2011 at 6:51pm by marko
Phyics
The average distance between Earth and the sun is 1.50e8 km. Calculate the average speed, in km/h, of Earth assuming a circular path about the sun. Use the equations v = 2r/T. Please ignore this question and view the question I have a few spaces above. The equation was not ...
Thursday, August 16, 2007 at 9:19pm by Jayd
Phyics
a. Try using Newton's second law. (F = ma) b. Ditto. acceleration (a) equals zero. What does that tell you about the net force? c. Again, use Newton's second law d. Use the definition of the coefficient of (kinetic) friction, together with the friction force and the ...
Tuesday, June 21, 2011 at 7:29pm by drwls
Phyics
You are driving a 2520.0 kg car at a constant speed of 14.0 m/s along an icy, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance ...
Monday, February 28, 2011 at 2:42pm by Moha
phyics
Ethyl alcohol has been added to 190 {\rm mL} of water in a container that has a mass of 140 {\rm g} when empty. The resulting container and liquid mixture has a mass of 450 {\rm g}. What volume of alcohol was added to the water? Express your answer using two significant figures.
Sunday, December 4, 2011 at 10:08pm by please help
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