Physics - April 2007

In this question Use Mesh analysis to find currents through all loops also find currents through each resistance in the networks below. Identify and label each mesh and also show each step of calculation otherwise you will lose your marks. Also mention the units of each derived value. Please see diagram from http://siel.edu.pk/Mesh.doc

2007-04-18 17:20:43 · 1 answers · asked by medious009 1

In uploaded diagram Use Mesh analysis to find Current through each mesh in the given network also find the current Io. Identify and label each mesh and also show each step of calculation otherwise you will lose your marks. Draw the complete circuit diagram and also mention the units of each derived value. Download Cercuit Diagram from http://siel.edu.pk/MeshAnalysis.doc

2007-04-18 17:17:15 · 2 answers · asked by medious009 1

Hi there, I need to actually find the sum or the Resultant Direction of the force applied to Earth taking all planets out to Saturn considered. Is there a way for Excel to do this?

2007-04-18 16:55:58 · 1 answers · asked by yourlaughing 1

Hey everyone,

I have a little simple machines poster due tommorow and it's really late over here, anyway i need the official formula for getting the Ideal Mechanical Advantage of a wedge. i need the forumla used everywhere (looked at 2 sites and they gave 2 different formulas.

Btw. as in formula I mean like the parenthese part, in example of inclined plane MA, ma=(l/h).

Thanks

2007-04-18 16:43:03 · 1 answers · asked by darkorzbc 2

2007-04-18 15:58:06 · 9 answers · asked by LOOPYFRUIT96 1

A standing wave function for n=1 is given as y(x,t)= 2sin( x(π/4) ) sin(π t).
Here, k= π/4, w (or omega) = π, lamda (or wavelength)=8 m, L=4 m, T=2 sec, and f=1/2 Hz.

Now, for n=3, regarding finding the new y(x,t) equation, how do you solve for the w (omega) of the new equation?

2007-04-18 15:45:29 · 1 answers · asked by Space Cadet 3

1.) A steel bar exactly 1 m long at 20 degrees Celcius (C) has its ends fixed in place. Obtain a crude estimate of the deflection of the center of the bar when it is heated to 200 degrees Celcius (C) by assuming that the figure formed by the hot rod is a triangle.
(if needed, the coefficent of steel is 1.2)

2.) If 6.0 kg of ice at -10 degrees C is added to 6.0 kg of water at + 10 degrees C, what is the temperature of the resulting mixture?

(if needed, specific heat capacities of water is 4.19 kJ/kg*C and ice is 2.09 kJ/kg*C)

2007-04-18 15:44:28 · 1 answers · asked by Tyler D 1

necessary to fracture your femur based on the properties. Show assumptions.

2007-04-18 15:35:04 · 1 answers · asked by frankdavis2 1

Assume weight of lower arm, location of biceps attachment, etc.)

2007-04-18 15:29:43 · 1 answers · asked by frankdavis2 1

I'm trying to find out people's thoughts as to the theories behind these formulas: Ek = 0.5mv^2, Ep = mgh, and P=W/t. Any good guesses?

2007-04-18 15:21:16 · 1 answers · asked by skybluu 2

1: give and educated guess
2: use your imaganation

2007-04-18 14:49:42 · 9 answers · asked by gohanss464601 3

A 2.50-m length of copper pipe extends directly from a hot-water heater in a basement to a faucet on the first floor of a house. If the faucet isn't fixed in place, how much will it rise when the pipe is heated from 16.5°C to 82.5°C. Ignore any increase in the size of the faucet itself or of the water heater.

2007-04-18 14:34:00 · 3 answers · asked by Anonymous

A bright object and a viewing screen are separated by a distance of 72.0 cm. At what location(s) between the object and the screen should a lens of focal length 12.0 cm be placed in order to produce a crisp image on the screen? [Hint: First draw a diagram.]

smallest possible distance from object:
_____ cm
largest possible distance from object:
_______ cm

2007-04-18 14:20:10 · 2 answers · asked by webogirl 2

how do i do this:
Reference is sometimes made to a singer's 'hitting high C.' What is the wavelength of this sound at 10 oC? (The frequency of high C, more precisely called C6, is 1047Hz.)

thanks so much!

2007-04-18 14:13:06 · 3 answers · asked by lifeisgood20 2

How do u convert watts/second into Kilowatt-hours?

gimme an example and step by step PLZ PLZ

If possible can someone gimme a webswite or review site on circutis?

2007-04-18 14:02:31 · 3 answers · asked by Anonymous

2007-04-18 13:58:18 · 3 answers · asked by Fredy G 1

Temperature change time base problem. Suppose V = 24 V, I = 0.2 A, mw = 50 gm, cw = 4.18 J/gm�K, mr = 10 gm, and cr = 3.7 J/gm�K. If the water is initially at room temperature, how long will it take for the water to heat up 2 �K?

2007-04-18 13:48:52 · 1 answers · asked by bebop1223@sbcglobal.net 2

Hello. I know that resonant frequency is the frequency at which an object vibrates. Segmented objects don't resonate well, because the sond waves tend to overlap and idssipate. Is there a way to modify sound waves so that the segmented object can shatter and/or implode? Please let me know. :D

2007-04-18 13:38:23 · 3 answers · asked by Anonymous

just need help on some science homework please!

2007-04-18 13:32:05 · 1 answers · asked by i_luv_music_2010 1

A train is traveling away from you at 120 km/h. It blows its whistle, and you hear a tone of 400 Hz. Take the speed of sound to be 340 m/s. What is the actual frequency of the whistle?

2007-04-18 13:07:46 · 2 answers · asked by Lakers 1

have been transferred to it?

2007-04-18 13:06:06 · 1 answers · asked by Fresca 2

A 3.00 m long pipe is in a room where the temperature is 20°C. What is the frequency of the second harmonic if the pipe is closed at one end?

2007-04-18 13:05:36 · 1 answers · asked by Lakers 1

A stream of water flowing through a hole at a depth of h=10.0 cm in a tank holding water to height H=40.0 cm.
A) At what distance does the stream strike the floor?
B)At what depth should second hole be made to give the same value of "x"?
C)At what depth should a hole be made to maximize "x"?

"x" is the distance from the container to the place the water hits from the first hole.

2007-04-18 12:58:44 · 1 answers · asked by Anonymous

2007-04-18 12:55:12 · 3 answers · asked by Fluffy Wisdom 5

I haven't practiced my algebra in a while, here's an example of what I mean. It's the physics equation:
Qcold = -Qhot
or : (mc dT) = -(mc dT)
with all the numbers plugged in, and I'm trying to find the final temperature : Tf

How do I get Tf on one side of the equation? A step by step solution is much appreciated, thanks.

24.0kg(4186 J/kg C)(Tf - 25.0 C) = -1.50kg (448 J/kg C)(Tf - 610 C)

2007-04-18 12:02:21 · 1 answers · asked by chrisamethyst 4

like, how did it fall? since it was so thick. was there a earthquake? or anything like it?

2007-04-18 11:59:17 · 6 answers · asked by Dudu 1

2007-04-18 11:27:49 · 7 answers · asked by hana s 1

I want to make the connections and hardlines and my neural network advanced so I may pick up understandings, and concepts more easier than usual.

What are the principles needed to be taken in order to accomplish this goal?

Thanks.

2007-04-18 11:26:00 · 3 answers · asked by Anonymous

What work is done?

2007-04-18 11:03:29 · 5 answers · asked by bkelton09 1

A 4.8 m diameter merry-go-round is rotating freely with an angular velocity of 0.50 rad/s. Its total moment of inertia is 1900 kgM2. Four people standing on the ground, each of 50 kg mass, suddenly step onto the edge of the merry-go-round.

(a) What is the angular velocity of the merry-go-round now?
w= rad/s

(b) Assume that the people were on it initially and then jumped off in a radial direction (relative to the merry-go-round). What would be the angular velocity of the merry-go-round?
w= rad/s


this stuff goes way over my heard....can anyone help?

2007-04-18 10:51:41 · 1 answers · asked by ping102_1999 1