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October 20, 2014

Search: phys

Number of results: 203

astronomy
Earths temperature averaged over the year is about 300 Kelvin. At what wavelength does it radiate most strongly? What part of the electromagnetic spectrum does this wavelength lie in? Can you see it? http://csep10.phys.utk.edu/astr162/lect/light/planck.html
April 16, 2007 by rohan

Physics
How do you calculate. How many years would it take the planet to orbit the sun. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Use Kepler's Third Law. If you have never heard of it, read http://csep10.phys.utk.edu/astr161/lect/...
December 29, 2006 by Harry

Phys Ed
What are 2 professional lacrosse leagues?
April 28, 2009 by Anonymous

phys
1) Pf(x)= f(-x), p operator Find the eigenvalues and eigenfunction of p 2)Show [f(xop), d/dx] = - df/dx
January 28, 2010 by Bun

phys
How many kcal of heat are required to vaporize 25.0 kg of water at 100C?
December 15, 2011 by Dennis

phys
show [f(xop), d/dx] = -df/dx please help, can sb gives a hint? I really appreciate.
January 28, 2010 by Bun

Phys Science
ok i posted it twice and no one has yet to help me about my physics
July 19, 2011 by 45843

Phys
What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654 m?
April 12, 2012 by Jason

Phys
A soda can (r=3cm) rolling at 2 m/s to the right is stopped in 1 m. What is its angular acceleration? (a is constant)
November 20, 2008 by Phys

phys
If your metabolic consumption of oxygen is 1500ml/min, what is the P02 of venous blood?
July 30, 2012 by lynn

PHYS
What is the frequency of a sound wave whose vibrations occur 5 x 10^-3 sec apart?
February 19, 2013 by paul

phys
or..can someone tell me what will happen when a bar magnet is placed in a current carrying coil?
December 20, 2007 by AllyKat

PHYS 101
Determine the volume of 200g of carbon tetrachloride,for wich specific gravity is 1.6
April 19, 2010 by KABELO

Phys
A Brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change.
April 2, 2012 by Jason

Phys
on a cool night with no wind people facing a campfire feel a breeze on their backs. why?
December 1, 2013 by Anonymous

physical education
i would like some work outs so i can raise my phys ed makes, any suggestions?
June 9, 2009 by jimmy junior

phys
a plane travels at 400 mi/r to a city away. Determine the time it takes for the round trip
October 2, 2009 by roek

10grd. Chem/Phys
numbers 1 4 6 8 9 10 12 14 15 16 27 34 49 56 57 58 70 all have or lack a certain property. any ideas i'm lost???
November 11, 2009 by Ryan

phys science
How much would your weight decrease if you went into space 3x the earths radius?
April 13, 2010 by anonymous

phys science
How much would your weight decrease if you went into space 3x the earths radius?
April 13, 2010 by anonymous

Phys
A certain ac signal at 60 Hz is applied across a 40-mH inductor and a 200- resistor. What is the power factor of this circuit?
April 11, 2011 by Rusty

phys
A reversible engine with an efficiency of 32.0% has TC = 304.0 K. (a) What is TH? (b) How much heat is exhausted for every 0.138 kJ of work done?
April 30, 2012 by opp

phys
An automobile tire is rated to last for 35,000 miles. To an order of magnitude, through how many revolutions will it turn?
September 16, 2012 by sedef

Physical Science Question 2
What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum. I will be happy to critique your thinking on this. The following 2 sites will answer all your questions. http://www.geo.mtu.edu/rs/back/...
June 20, 2006 by Liz

science
on light, heat and sound Waht are primary coulars of light What is spectram what are the colours What determins a colour Name one good conductor of heat and one good insulatore??? thanks if you help me send answer soon thanks a million http://csep10.phys.utk.edu/astr162/lect/...
July 25, 2005 by stephanie

anat. & phys.
draw & label all tissue/organs of endocrine sys. during stres response
September 6, 2010 by pat

phys 111
i travel 1 km east, than 1 km north, then climb 400m straight up a cliff. what is my distance from my starting point? a= 3i+2j+4k b= i-3j-4k
September 11, 2011 by jscibdizzle

Phys
Some propane occupies 150 cm^3 at 12.4C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
April 11, 2012 by Sara

phys
Calculate the total force of the atmosphere acting on the top of a table that measures 1.9m2.1m really have a clue how to start this
August 25, 2014 by john david

SCIENCE HELP!!??
HI I Like you to help me with my research on Attraction and repulsion of electrical charges If you would give me any links or websites and thank you alot thanx Check these sites. http://psych.hanover.edu/Krantz/neural/charge1anim.html http://www.glenbrook.k12.il.us/gbssci/phys...
January 13, 2007 by amy

Phys. Sci.
Which metal will only be found in nature combined with other elements? 1. gold 2. silver 3. platinum 4. lithium Thanks, Morgan
April 18, 2009 by Morgan

phys
What is the minimum lens size (in meters) that will permit just resolving 2 stars 1.1 second apart using light of 510nm?
January 6, 2010 by bun

Phys
A top starting from rest is spun for 3 seconds achieving an angular speed of 20 rad/s. How many radians has it gone through in this time? (a is constant)
November 20, 2008 by Phys

phys
What is the total translational kinetic energy of the gas molecules of 0.470 mol of air at atmospheric pressure that occupies a volume of 1.00 L (0.00100 m3)?
April 25, 2012 by opp

PHYS
You throw a bowling ball o the empire state building(381m high) 10m/s down- ward. How long does it take to get to the bottom?
June 17, 2013 by Q

phys ed
im in swim and my teacher thinks i have a bad stroke how do i get a strong stroke
April 28, 2010 by bills luver

phys
A rectangular plate has a length of (20.0 0.2) cm and a width of (8.3 0.1) cm. Calculate the area of the plate, including its uncertainty.
September 16, 2012 by sedef

phys.
a computer with a power input of 230.0 W (watts) has a resistance of 91.0 Ohms . how do you find the current in the computer?
January 11, 2010 by Sienna

phys
A wheel starts from rest and has an angular acceleration of 4.0 rad/s^(2). When it has made 10 rev its angular velocity is:
April 27, 2014 by jay

univ-phys
Two objects attract each other gravitationally with a force of 2.510^-10N when they are 0.22m apart. Their total mass is 4.50kg. Find their individual masses.
October 2, 2009 by Taylor Rae

Phys
The total impedance of an RC circuit with a resistance of 200 is 1060 . If the frequency of the applied voltage is 20.0 Hz, what is the value of the capacitance in this circuit?
April 13, 2011 by Sam

PHYS
The fundamental resonance on a string is 60 cm length fixed at both ends is 440Hz. What is the speed of a wave traveling on this string?
October 28, 2011 by Fox

physics
i dont understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I dont get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doubt if she...
November 29, 2006 by Katrina

Phys
A 120-V rms voltage at 2000 Hz is applied to a 6.0-mH inductor, a 2.0-F capacitor and a 200- resistor. What is the rms value of the current in this circuit?
April 11, 2011 by Rusty

phys
A 0.600-kg aluminum teakettle contains 4.00 kg of water at 26.0 C. How much heat is required to raise the temperature of the water (and kettle) to 100.0 C?
April 25, 2012 by opp

physics
The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 350 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their fundamental frequencies) ...
April 28, 2007 by Cavin

Phys
The masses and coordinates of three spheres are as follows: 18 kg, x = 1.50 m, y = 1.50 m; 40 kg, x = -1.50 m, y = -1.50 m; 64 kg, x = 0.00 m, y= -0.25 m. What is the magnitude of the gravitational force on a 14 kg sphere located at the origin due to the other spheres?
November 15, 2009 by Lizzy

phys
A 30.0-g lead bullet leaves a rifle at a temperature of 89.0 C and hits a steel plate. If the bullet melts, what is the minimum speed it must have?
April 26, 2012 by opp

phys
A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is
March 13, 2014 by tony

phys
A 1000-kg airplane moves in straight flight at constant speed. The force of air friction is 1800 N. The net force on the plane is
March 14, 2014 by q.

Phys. Ed
W.Shott OF CLEVELAND pitched a nine inning game without allowing a hit, or a walk, or a man to reach first, and his team made no errors. Yet he lost 1-0 How?
February 1, 2009 by Delaney

science
I am in middle school and we are doing a catapult projectile lab. The question is, using knowledge of force, motion and projectiles, can a catapult be built to accurately project a marshmellow toward a designated target. We have to change the angle of release and measure ...
October 22, 2006 by Wendi

physical science
Light is incident on aplane mirror at an angle of 46 degrees relative to its surface. What is the angle of reflection? Your exact answer here: http://en.wikipedia.org/wiki/Reflection_%28physics%29 The angle of incidence equals the angle of reflection but these are relative to ...
November 27, 2006 by Zuri

Phys Sci
A sound is traveling through air with a temperature of 35 0C. The sound wave has a wavelength of 0.75 meters. What is the frequency of the sound? How do I calculate this problem?
May 31, 2011 by LinWa

phys
Find every angle θ between 0 and 360 for which the ratio of sin θ to cos θ is -3.00. (Round your answer to the nearest degree.)
September 16, 2012 by sedef

phys.
the shortest and longest wavelength series in singly ionized helium is 22.8nm and 30.4nm . Are they right? How many orders we can see between the angles range observations 30 and 90 in the Balmer's series?
December 8, 2009 by bun

Phys sci
we are makeing rube goldberg machiens but are problem is hot to activate the pulley by putting the string in to the fire befor its time and makeing the machine do other things.
October 20, 2011 by Abigail

phys
The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is: ans is 400 K how?
July 7, 2014 by jay

phys-frequency
If one doubles the tension in a violin string, the fundamental frequency of that string will increase by a factor of: 2 4 1.4 1.7 ?_?
December 6, 2009 by Taylor

phys
An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s^2 west for 3 seconds. During this time the object travels a distance of:
February 9, 2014 by jay

phys!!! how do you do this
Just after opening a parachute of negligible mass, a parachutist of mass 85.5 kg experiences an instantaneous upward acceleration of 1.12 m/s2. Find the force of the air on the parachute.
October 22, 2012 by anthony

Phys
Centripetal force: a race car driver wants to stay as straight as possible around the curves in the race. What should happen to his radius, force and velocity?
May 7, 2014 by Kate

Maths
Hello how do we get the resultant force of a vector id the the forces were in different directions ? and how do we use the parellogram thingi do we just add the forces? please can some1 explain me this in their own words thanks alot Since this is not my area of expertise, I ...
June 7, 2007 by Acer

phys/ 210
I need help in answering this question personality theories disussed in text i am using learning theory and trait theory comparing and contrasting these two theories
July 3, 2010 by marie

Phys Please Help!!
Just after opening a parachute of negligible mass, a parachutist of mass 85.5 kg experiences an instantaneous upward acceleration of 1.12 m/s2. Find the force of the air on the parachute.
October 22, 2012 by anthony

phys
A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:
May 1, 2014 by jay

phys
At t= 0, a particle starts from rest at x= 0, y= 0, and moves in the xy plane with an acceleration ->a = (4.0ihat+ 3.0jhat)m/s^2. Assume t is in seconds. Determine the position of the particle as a function of time t. Express your answer in terms of the unit vectors ihat ...
September 15, 2009 by physics

Phys..magnets
can someone please explain this aim: To investigate how the force acting on a bar magnet placed in a current carrying coil is related to the coil??? what is the force called?
December 20, 2007 by AllyKat

Phys
A stationary 50 kg circular object (r0=.25m) is on a 30 degree incline. The coefficient of rolling friction between the block and the incline is 0.05. If it moves for 3 seconds, what is the angular displacement of the object at this time?
November 20, 2008 by Phys

phys
A toy airplane of mass 0.159 kg is tied to the ceiling with a string. The airplane moves in a horizontal circle of radius 2.97 m, with a constant speed of 1.51 m/s. What is the angle the string makeswith the vertical?
December 7, 2009 by stacy

Phys sci
Which one of the following frequency can set the string into resonant vibration? If a guitar string has a fundamental frequency of 500Hz a)250Hz b)750Hz c)1500Hz d)1750Hz
December 8, 2009 by Joanna

phys
To totally convert a given amount of mechanical energy into heat is Choose one answer. a. impossible. b. possible. c. impossible to answer without additional information.
February 17, 2011 by Anonymous

PHYS HELP
Water flows over a section of Niagara Falls at a rate of 1.43 10^6 kg/s and falls 62.5 m. The acceleration of gravity is 9.8 m/s^2. How much power is generated by the falling water? Answer in units of MW.
March 9, 2011 by johana

Phys Sci
a marble is launched off of a 1.3m high horizontal table with a velocity of 7.2m/sec how far away from the table will the marble land? how long does it takes to hit the floor?
July 19, 2011 by 45843

phys. science
when most matter is heated it expands right? & doesnt water expand when it is heated? & what is the diff. b/w thermal conductor and thermal insulator? & in which direction will heat spontaneously flow?
May 15, 2008 by leann

phys
Four point masses are at the corners of a square whose side is 20 cm long (see Fig 3). What is the magnitude of the net gravitational force on a point mass m5 = 2.5 kg located at the center of the square?
May 19, 2011 by ayyashi

phys
male erection is an example of __________. no thought or emotion is required for it to occur, but conscious control can influence it. a. peripheral nerves b. sensory nerves c. a spinal reflex d. a sexual reflex
August 13, 2013 by mike/meka

phys
Doug pushes a 4.65 kg crate up a 2.00 m high 13.0 frictionless slope by pushing it with a constant horizontal force of 35.8 N. What is the speed (in m/s) of the crate as it reaches the top of the slope assuming that the local acceleration due to gravity is -9.80 m/s2?
November 9, 2011 by tc

phys
A 5g bullet is fired from a 5000g gun. If the bullet leaves the gun going +800m/s, with what speed does the gun recoil?
October 18, 2010 by gg

PHYS
You are watching water waves pass a tide gauge fastened to the end of a pier. At their highest the crests reach a mark labeled 3.8 m, and at the low point, you can just see the 3.2 m mark. What is the amplitude of the waves?
February 19, 2013 by Jim

phys
A rock stuck in the tread of a 56.0--diameter bicycle wheel has a tangential speed of 3.10 . When the brakes are applied, the rock's tangential deceleration is 1.30m/s2 What is the magnitudes of the rock's angular velocity at = 1.70 ?
May 28, 2012 by keren

Phys. Sci
I am trying to find out which one of these elements would not be reactive at all. The thing is, reactivity series only include metals, right? And some of these are not metals. Is there another way to determine their reactivity? Thanks, Morgan
April 18, 2009 by Morgan

U. Phys
What is the angular momentum of a 3.7kg uniform cylindrical grinding wheel of radius 25cm when rotating at 1500rpm? How much torque(in magnitude) is required to stop it in 5.0s? Could you explain this in detail, I don't really understand torque and momentum well.
November 2, 2009 by Taylor

physics
what is the difference between work and workdone I hope the following references will help you: http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Work/DefinitionWork.html http://en.wikipedia.org/wiki/Mechanical_work http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/energy/u5l1aa....
November 25, 2006 by ada

phys chem
Calculate the Coulomb potential due to the nuclei at a point in a LiH molecule located 200 pm from the Li nucleus and 150 pm from the H nucleus. just doing exam review and got stuck on just this one, be great if I could get an answer.
April 9, 2012 by harry

PhYs...alpha particles
how do u investigate how the range of alpha particles in air is affected by air pressure? Like..a method and what materials that wud be used.
February 17, 2008 by AllyKat

PHYS. (forces)
A Styrofoam ball has just been shot straight up. Air resistance is not negligible. Draw a free-body diagram. i only have two attempts left and im not sure what im doing wrong. is the direction of gravity(down) and drag (up) wrong?
September 23, 2014 by Dib

phys
Given Vector A with magintude 9.17 feet and Vector B with magnitude of 10.58 feet, what is the resultant of the two vectors added together? Asn: Do we just add to the values together? 19.75 ft???
August 29, 2005 by Jawad

Phys
A force of 5 N acts on a moving body& after some time an equal &opposite force acts on this body will it come to rest or not
August 11, 2012 by SABBIR AH. LASKAR

phys. help
A 30-kg child coast down a hill on a 20-kg sled. She pushes off from the top of the hill with a velocity of 1 m/s. At the bottom of the hill, she is moving 4 m/s. If there is no heat generated when she slides down, how high is this hill? thank u
March 5, 2008 by Aulivia

phys
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x C, what is the change in temp of the copper?
November 2, 2009 by abbigail

phys
An airplane must reach a speed of 185 mi/h to take off. If the runway is 500 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully?
January 30, 2011 by Lisa

phys
A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30 degree below the horizontal. If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is:
March 12, 2014 by tony

wow...Phys...this has me COMPLETELY clueless
it is a projectile motion question i just can't seem to figure out A ball is shot from the ground into the air. At a height of 9.1 m, its velocity is observed to be v = 7.6i + 6.1j m/s To what maximum height does the ball reach? the answer is suppose to be 11m
September 17, 2008 by Kim-lee

Physıcs
Formula force calculatıng force
February 2, 2014 by Murtala

Phys
Consider an infinitely long solid cylinder with radius R_0 and volume charge density rho=rho_0*r(r≤R_0) where rho_0 is a constant. Use first principles to determine the electric field E(vector) for r<R_0
February 21, 2010 by Taylor

Phys
Charged particles #1 and #2 are 0.4 cm apart in air and exert a 100 Nt on force each other. If the 2 charges (at the same distance) exert a 25 Nt for on each other in substance "blox", then "blox" has a dielectric constant of: 0, 4, 2, 2500, more info needed
February 5, 2011 by Lynn

phys.
suppose your local electric company charges $0.0650/kWxh for the first 200.0 kWxh, and then drastically raises the price for every kilowatt-hour more. What is the maximum you family would pay if they wanted to pay only the cheaper rate?
January 11, 2010 by Sienna

physics
For the question about friction force impeding motion. I'm sorry I tried what you wrote and did not get the correct answer. Its' not your fault. I am doing university phys and have never taken it before. I am little confused about what to do. Could you put it in steps for me...
October 15, 2010 by Anne

phys
Heat Q flows spontaneously from a reservoir at 481 K into a reservoir at 298 K. Because of the spontaneous flow, 2760 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 298 K and a reservoir at 249 K. Find Q.
December 2, 2012 by Redgy22

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