Physics - May 2007

Why are the wingspans of birds a consideration in determing the spacing between parallell wires in a power line?

2007-05-01 16:43:37 · 2 answers · asked by JJ99 1

2007-05-01 16:08:43 · 13 answers · asked by tedoja 1

2007-05-01 15:56:19 · 2 answers · asked by krysdizzle_2006 1

Calculate the binding energy per nucleon for the following isotopes

64Zn

MeV/nucleon


7Li

MeV/nucleon

2007-05-01 15:40:14 · 1 answers · asked by Anonymous

thanks for answering !!!

2007-05-01 15:35:07 · 9 answers · asked by edbiology 1

Rearrange the equation current=voltage/resistance to express resistace in terms of current and voltage. Then solve for the following: A certain device in a 120-V circuit has a current rating of 20 A. What is the resistance of the devise (how many ohms)?

The wattage marked on a lightbulb is not an inherant property of the bulb but depends on the voltage to which its connected, usually 1110 or 120 V. How many amperes flow through a 60-W bulb connected in a 120-V circuit?

2007-05-01 15:09:26 · 7 answers · asked by JJ99 1

The initial velocity is 30m/s.

2007-05-01 14:47:40 · 1 answers · asked by Al 1

The area under the line in an acceleration-time graph represents the...
a. change in velocity
b. displacement
c. slope
d. area

2007-05-01 14:41:45 · 5 answers · asked by Anonymous

Do they burn up in the atmosphere? Do they disintegrate? Do they go into space? Do they come back down?

2007-05-01 14:26:16 · 13 answers · asked by Chow 2

2007-05-01 14:06:33 · 1 answers · asked by santista 2

2007-05-01 13:58:32 · 5 answers · asked by mbo 1

The drawing shows two graphs that represent a transverse wave on a string. The wave is moving in the +x direction. Using the information contained in these graphs, determine the following properties of the wave:
http://www.webassign.net/CJ/16_26.gif

a. the amplitude
_____ m
b. the frequency
_____ Hz
c. the wavelength
_____ m
d. the speed
_____ m/s

2007-05-01 13:17:40 · 1 answers · asked by Khoi 1

Please explain

2007-05-01 13:17:12 · 1 answers · asked by girichh 2

what fraction of a turn is that?
2. Mark says that the fifure above was flipped. Faith says that it made a 3/4 turn, Steven says, that ti made a 90 degree turn. Who is correct?

2007-05-01 13:11:57 · 5 answers · asked by rosemariestewart64 1

2007-05-01 12:54:15 · 5 answers · asked by Victor Z 1

A light spring of constant 180 N/M rests vertically on the bottom of a large beaker of water. A 4.12 kg block of wood of density 680 kg/m^3 is connected to the top of the spring and the block-spring system is allowed to come to static equilibrium. what is the elongation of the spring ? answer in units of cm.

2007-05-01 12:36:02 · 2 answers · asked by Anonymous

teaching an asvab course and need a refresher on things so I appreciate your help tonight?

2007-05-01 11:30:41 · 4 answers · asked by yellowkayak 4

A uniform spherical shell of mass M and radius R, spins about its axis with
an angular velocity ω. The cylinder is now dropped on a horizontal table located
slightly below the cylinder. The coefficient of friction between the cylinder and the
table top is μ. The cylinder then initially slips relative to the table, but after a time T
it continues to roll without further slipping. Express your answers to the following
questions in terms one or more of the known quantities. M, R, ω0 and μ.
a) How large is the time T?
b) What is the speed of the spherical shell’s center at the instant when the spherical
shell stops slipping?
c) Suppose that the spherical shell had twice as large a radius. If the spherical shell is
made of the same material, its mass would then be four times as large. How much
larger would be the time T? How much larger would be the final speed of the
spherical shell’s center?

2007-05-01 11:05:41 · 1 answers · asked by Anonymous

A man wishes to push a chest across the horizontal floor.
To do this, he applies a horizontal force of magnitude F0 to
the rear of the chest, as indicated in figure. The rear and
front legs of the chest are separated by a distance b. The
chest has a mass M and its center of mass C is located
midway between its legs at a height h above the floor. The
coefficient of kinetic friction between the floor and the
legs of the chest is μ. What is the maximum vertical height
y above the floor that the force can be applied so that the
rear legs of the moving chest do not leave the floor and so
that the chest does not begin to flip over?

2007-05-01 11:04:48 · 1 answers · asked by Anonymous

if particles are constantly dashing between universes, doesn't that mean that we are constantly dashing between universes and that quanta are actually particles dashing between universes?

2007-05-01 10:48:08 · 7 answers · asked by J 2

I don't want people to assume that I support ID. In fact I agree with not falsifiable premise.
But what invokes my curiosity is that ID can't be taught as science in schools because it is not falsifiable but I am wondering how come Drake Equation is accepted by Scientific Community.

2007-05-01 10:36:23 · 10 answers · asked by searchingwisdom 2

2007-05-01 09:56:48 · 11 answers · asked by sam f 1

If the amplitude of a sound wave is increased by a factor of four, how does the energy carried by the sound wave in a given time and interval change?

2007-05-01 09:37:14 · 4 answers · asked by Anonymous

2007-05-01 09:36:27 · 1 answers · asked by noot87 1

2007-05-01 09:32:05 · 5 answers · asked by Peggy C 1

2007-05-01 09:21:11 · 1 answers · asked by noot87 1

I understand the light cone analogy, but aren't we all sharing it at the same time on earth? Why do we travel at different rates?

2007-05-01 09:14:46 · 4 answers · asked by rebamarnette 1

2007-05-01 09:13:33 · 5 answers · asked by Skepticat 6

2007-05-01 09:13:06 · 3 answers · asked by Alexander 6

10 sec wait + 30 sec accel + ?=?

2007-05-01 08:50:27 · 2 answers · asked by rubbersidown 1