Physics - March 2007

2007-03-18 14:17:30 · 1 answers · asked by ivey 1

Can someone help me with these problems? I don't understand how these are worded!

1.) Supposed two charges. each 4 micro coulombs, are located 2- cm apart. How much force is exerted on each charge?

2.)How much charge much be on one object for it to be repelled with a force of 5N by a second charge of 1 micro coulomb at a distance of 1 meter?

3.)How much is the strength of the electric field at a distance of 20 cm from a 4 microcoulomb charge?

4.)What will be the force on another 4 micro coulomb charge at the location for which you calculated the electric field in question 3 ?

2007-03-18 14:16:24 · 1 answers · asked by xItsMeJenniferx 1

2007-03-18 14:06:51 · 9 answers · asked by rseegp 2

If an object of mass 10.0Kg starts 5.0m above the ground what are the kinetic and potential energies at 2.5m above the ground? what is the velocity at this same height

2007-03-18 13:40:19 · 2 answers · asked by Anonymous

How long will it be in the air?

2007-03-18 13:39:58 · 2 answers · asked by vietxpridex92 1

If i have two masses one 5.00Kg and one 15.0Kg in empty space, what is the gravitational force between them if they are 3.00m apart?

2007-03-18 13:38:53 · 2 answers · asked by Anonymous

a 5.0 MeV (kinetic engery) proton enters a .20-T field, in a plane perpendicular to the field. What is the radius of its path?

Please provide step-by-step instructions. I've been trying to figure this out. Thank you!

2007-03-18 13:38:37 · 2 answers · asked by Sparkles 3

Yeah, potential energy turns into kinetic, but how did we get the potential energy. Please make the answer understandable. Thank you!

2007-03-18 13:30:30 · 9 answers · asked by Anonymous

2007-03-18 13:12:04 · 9 answers · asked by Anonymous

if evolutionsits believe that we evolved from ancestors and we adapted to our surroundings. how could we have adapted to something (water, oxygen, and food) not knowing that there was such a large long lasting supply of it? and how water can be reused after precipitating or whatever. was it just chance that we adapted to these things?

2007-03-18 13:08:06 · 11 answers · asked by Anonymous

2007-03-18 13:04:18 · 4 answers · asked by Anonymous

I have some data dealing with deformation in a crash test and am compairing it with a real life situation. I have the speed of the vehicle in the crash test and the resulting deformation. I also have the information realting to the deformation on the car durring the "real" situation.

There must be some formula that I am missing...... can someone poke me in the right direction?

Does it matter that in the real crash there is deformation to both cars?

I am thinking that there is something with work and energy...... springs and kinetic energy..... but I am unsure.

We are assuming alot here:
-flat ground
-linear impact.............. ect

2007-03-18 12:52:26 · 1 answers · asked by james m 3

A rifle has a mass of 5.46 kg and it fires a bullet of mass 10.3 g at a muzzle speed of 816 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel?

2007-03-18 12:48:59 · 4 answers · asked by Anonymous

2007-03-18 12:33:33 · 2 answers · asked by Shawn G 1

Here is the info...
d1=28m(W37S), d2=40m(W53N)

The thing is I must use the cosine law to determine the diplacement....BUT I'm having trouble to get the cosC because I don't know what to do with the magnitudes since there are two...please help me

2007-03-18 12:24:35 · 2 answers · asked by VC 1

I understand the idea that if there are excess electrons on one end of a wire, and a shortage on the other, emf will cause elctron flow. I also understand such flow is relatively slow. But if we look at the propagation of a pulse from one end of a wire to the other, it is fast, light speed. It is as if the electrons at the far end, were communicated to via some light speed means, of the abundance of electrons at the initiating end. But, I've never read of any wave or particle theory accounting for electron flow within a conductor. Whats up?

2007-03-18 12:15:08 · 1 answers · asked by dave_w_03303 2

The question reads: A force of 154 N is used to acelerate a 15.4 kg box across the floor at a rate of 3.25 m/s^2. What is the coefficient of friction between the box and the floor?

Could someone please explain to me how to do this problem...

2007-03-18 12:05:53 · 6 answers · asked by Curious_Camo_Jess 5

A vibrating tuning fork sends sound waves into the air surrounding it. During the time in which the tuning fork makes one complete vibrations, the emitted waves travels .....

A. one wavelength

B. about 340 meters

C. a distance directly proportional to the frequency of the vibration

D. a distance directly proportional to the suare root of the air density

E. a distance inversely proportional to the square root of pressure

2007-03-18 12:03:57 · 2 answers · asked by Anonymous

A cue stick hits a cue ball with an average force of 22.6 N for a duration of 0.0268 s. If the mass of the ball is 0.148 kg, how fast is it moving after being struck?

2007-03-18 11:59:03 · 4 answers · asked by Anonymous

thanks.

2007-03-18 11:52:32 · 3 answers · asked by Anonymous

2007-03-18 11:08:57 · 15 answers · asked by the_disturbed86 1

2007-03-18 11:07:55 · 2 answers · asked by D 1

2007-03-18 11:07:09 · 4 answers · asked by nick f 1

1. A person uses a converging lens that has a focal length of 10.0 cm to inspect a gem. The lens forms a virtual image 26.0 cm away. Determine the magnification???
2. A goldfish is swimming at 4.60 cm/s toward the front wall of a rectangular aquarium. What is the apparent speed of the fish measured by an observer looking in from outside the front wall of the tank? The index of refraction of water is 1.333. (cm/s)??
3. A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the person to the first three images seen in the left-hand mirror, when the person is 13.0 ft from the mirror on the left wall and 12.0 ft from the mirror on the right wall.
First image? Second Image? Third Image?

PLZ HELP

2007-03-18 10:59:38 · 1 answers · asked by lol 1

How much charge would have to be put on objects that are 3.84 x 10^8 m apart so that it creates the gravitational force of 1.99 x 10^20 N?

2007-03-18 10:48:22 · 2 answers · asked by Question-er 2

1) what happens to the kinetic energy of the ice during the process of melting? explain.

2) what happens to the potential energy of ice while it melts? explain.

thanks

2007-03-18 10:32:55 · 3 answers · asked by Ysobel 1

I mean something that would be able to see a rock on a planet in another galaxy.

2007-03-18 10:29:50 · 7 answers · asked by Anonymous

Solve the initial velocity of a projectile being fired at an Angle of 9 degrees above the horizontal. It is fired from 1.015m above where it lands, and displacement in the x direction is 3.885m.

What is the initial velocity?

2007-03-18 10:16:29 · 3 answers · asked by Anonymous

taking into consideration the whole extent of the universe down to the smallest particle known , is it possible to position ourselves in the scale of things ? Like for instance halfway between the largest and the smallest thing . (Just as a matter of interest)

2007-03-18 10:15:10 · 4 answers · asked by Anonymous

2007-03-18 10:01:44 · 5 answers · asked by droundy 2