Physics - February 2007

2007-02-09 11:39:26 · 4 answers · asked by Source 4

Is it something to do with scattering & wavelength?

2007-02-09 11:10:52 · 12 answers · asked by Anonymous

To attain the maximum range a projectile has to be launched at 45 degrees if the landing spot and the launch spot are at the same height (neglecting air resistance effects.)
Explain in a few sentences how the relation between the vertical and the horizontal components of the initial velocity affects the projectile range?

2007-02-09 10:41:50 · 4 answers · asked by billu_bhai 3

Please settle this disagreemant between my son and I.
Thanks

2007-02-09 10:35:08 · 31 answers · asked by jabelite 3

I can't figure out how to set this problem up correctly. I thought that since each coil experienced the same maximum torque and received the same current that I could set their respective NIABsin(phi) equations equal to each other, cancel out current, and solve for the area of the second coil, but the answer that I got was incorrect (8.899 cm). Can anyone help me out in setting this problem up? Thanks in advance.

Here's the problem:

Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field in a setup similar to the square coil in the figure below. Coil 1 has a radius of 4.2 cm and rotates in a 0.19 T field. Coil 2 rotates in a 0.42 T field. Each coil experiences the same maximum torque. What is the radius (in cm) of coil 2?

http://www.webassign.net/CJ/21-21.gif

2007-02-09 10:32:49 · 1 answers · asked by larkinfan11 3

Do they have any thing to do with each other?

2007-02-09 10:03:57 · 5 answers · asked by mackstarted 2

A light beam of variable wavelength normally incident from air onto the oil surface. Observation of the reflected beam shows destructive interference at 503 nm and constructive interference at 709 nm with no intervening maxima or minima. Find the thickness of the oil layer. Answer in units of nm.

2007-02-09 10:02:44 · 2 answers · asked by longdecember 1

yes or no

2007-02-09 09:37:11 · 7 answers · asked by Anonymous

Will the bullet from the rifle hit the ground at the same time as the dropped bullet? Does velocity change the pull of gravity?

2007-02-09 09:33:26 · 7 answers · asked by swedishhighball 1

Somebody please tell me this double slit experiment is a big effing joke! cuz if its not, then HOLY MOTHER F!#K !!!! Thats some serious S#@T !!

2007-02-09 09:27:20 · 8 answers · asked by joe s 1

10 snooker balls of radius r. are placed equidistantly along
a straight line, originating from the center of one pocket.
The distance betwen centers of each pair of balls is d.

A novice player strikes the last ball with a cue in the
direction of the pocket and pots the first ball each he
perfoms the trick.
What is the maximum distance between the balls?
(assume no friction and no energy loss)

Please help, people... my dad promised to sign my DMV application if I get A on this assignment.

2007-02-09 09:24:19 · 8 answers · asked by Alexander 6

Find the equivalent capacitance between points a and b in the combination of capacitors shown in Figure P16.42. (C1 = 5.0 µF and C2 = 4.0 µF.)

http://www.webassign.net/pse/p26-30alt.gif
Figure P16.42

2007-02-09 09:18:11 · 2 answers · asked by Anonymous

Find the equivalent capacitance between points a and b for the group of capacitors connected as shown in Figure P16.40 if C1 = 5.00 µF, C2 = 11.0 µF, and C3 = 2.00 µF.


http://www.webassign.net/sercp/p16-40.gif
Figure P16.40

2007-02-09 09:17:09 · 1 answers · asked by Anonymous

15. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be

A. real, inverted, and larger than the object.
B. real, inverted, and smaller than the object.
C. virtual, upright, and larger than the object.
D. virtual, upright, and smaller than the object.

2007-02-09 09:02:43 · 3 answers · asked by tami t 1

2007-02-09 08:58:29 · 11 answers · asked by Anonymous

Just give me a chemcial equation for turning hydrogen into helium..thank you!

2007-02-09 08:32:40 · 6 answers · asked by Vikusya 1

How much pull does gravity have on light? Can gravity be used to speed it up? Black holes can trap light with high gravity, so slowing light down should be possible.

2007-02-09 08:23:06 · 11 answers · asked by 4-real 2

A. an idea
B. a law
C. a rule
D. an equation
E. a formula

2007-02-09 08:19:32 · 7 answers · asked by Vikusya 1

If a person makes the same measurement repeatedly, but the measurement is not related to the standard value, the measurement is _______________.

Here are your options:
Neither accurate, nor precise
Precise, but not accurate
Both accurate and precise
Accurate, but not precise

Thanks!

2007-02-09 08:18:47 · 6 answers · asked by Aliza, Queen of the Night 3

Two identical blocks are tied together with a string and placed along the same radius of a turntable that is spinning about its center. The inner block is 2 cm from the center and the outer block is 5 cm from the center. The coefficient of static friction between the turntable and the blocks is µs = 0.79, and the string is taut.

2007-02-09 08:02:29 · 2 answers · asked by Pritesh P 2

There is an escape velocity to leave earth. 8 km per second.

But if we build a gigantic ladder, we can slowly climb to outer space, so escape velocity will be 1-2 feet per econd.

2007-02-09 08:02:18 · 5 answers · asked by type2negative 4

2007-02-09 07:55:29 · 10 answers · asked by Anonymous

Hey yall! sorry for the inconvenience, but i need help witht his for my physics activity.

A 65-kg boy and a 45-kg girl use an elastic rope while engaged in a tug-of-war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0m/s^2, find the magnitude of the acceleration of the boy towards the girl.

thanks guys :] !

2007-02-09 07:48:24 · 2 answers · asked by happygolucky! 1

yes

2007-02-09 07:43:52 · 4 answers · asked by type2negative 4

It seems to me that some of the scientific descriptions of light are similar to how the Ancient Aryans in the Vedas described GOD!
(Brahma) When we talk about quarks and so forth and elements, are we really describing something we know or a theory we believe? Are Black holes really what they say or a path to a new dimension? Metaphysics reachs a point of not knowing and so does physics and at that point they seem to agree in some aspects. can anyone name or explain a few of these things for my list? Few people know or care about both fields as they seem to dislike or discredit each other. I am looking for the common bonds they can agree upon.

2007-02-09 07:43:34 · 3 answers · asked by Anonymous

Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.9 m/s. Where will Tom strike the floor?
___m from the table

What velocity components will he have just before he hits? (Use a coordinate system in which up is positive.)

x___m/s

y___m/s

2007-02-09 07:37:37 · 2 answers · asked by cosmo 1

1st my scientific english isnt good at all , so please try to understand what i mean , When there are 2 coils next to each other one connected to a battery and called primary coil and the other connected to a gelvanometter only and called a secondary coil . when there is a current is in the primary coil is generated the gelvanometter in the secondary coil shows that there is current is genrated in it .

So when we move the primary coil near the seconadry coil the current is the seconadry coil moves in the opposite way the current moves in the primary coil << in primary it moves from right to left , in secondary will move from left to right >> thats happens according to lenz law . if its a fact , how can this happen and the magenitic feilds will be in opposite ways if this happened so the 2 coils will attract and at the same time they are not supposed to be attracted .. can any one explains , how this happens . thanks

2007-02-09 07:26:06 · 1 answers · asked by Anonymous

If i were to fall in a hole that willl never end, what will eventually happen? Whats the fastest speed i will reach, what will happened to my body ... ect..

2007-02-09 07:23:15 · 8 answers · asked by Anonymous

my dad asked me i have no clue he knows but wont tell me

2007-02-09 07:01:02 · 5 answers · asked by JD 1

and lightly on a light object, so they fall together???

2007-02-09 06:51:36 · 9 answers · asked by Anonymous