Physics - December 2006

i mean the earth and all the other planets are like electrons rotating the sun which acts as hte nucleus.

2006-12-08 14:35:19 · 11 answers · asked by harry jones 1

Two bowling bowls each have a mass of 6.8 kg. They are located next to each other with their centers 21.8 cm apart. What gravitational force do they exert on each other.

Please help me understand this problem.
I'm having trouble understanding it.

2006-12-08 14:33:35 · 1 answers · asked by swimmertommy 1

Tom has a mass of 70.0 kg and Sally has a mass of 50.0 kg. Tom and Sally are standing 20.0 meters apart on the dance floor. Sally looks up and sees Tom. She feels an attraction. If the attraction is gravitational, find its size. Assume that both Tom and Sally can be replaced with sephrical masses.

Please help me with this problem.
I'm having trouble understanding it.

2006-12-08 14:31:54 · 6 answers · asked by swimmertommy 1

What is spontaneous combustion? And what is nessasarry for it to occur?

2006-12-08 14:07:30 · 4 answers · asked by gistog2006 2

What is it capable of? 10,000 joules?
I need to know for my study on nuclear fusion.
Any help is appreciated!

2006-12-08 14:05:32 · 6 answers · asked by Ammy 6

Kinematics Question: Afigther plane flies horizontally at a constant speed of 200m/s. It carries a cannon inclined at an angle of 30 degress below the horizontal.
(a) If it takes 10s for teh projectile which has a muzzle velocity of 500m/s (with respect to the plane) to reach a target on the ground, find the height at which the plane is flying.

I don't understand the significance of the phase 'with respect to the plane' like what will change without this phase and what will change with this phase? What is muzzle velocity?
I got an answer of 2990.5m, is it correct?

(b)How far ahead of the target must the pilot fire the cannon to get a direct hit?
I got an answer of 4330m but I didn't take into account the speed of the plane so is the answer correct?

(c)Find the horizontal and vertical compotents of the velocity of the projectile just before it hits the target.
I got horizontal: 433m/s and vertical: 348.1m/s. Is it correct?

2006-12-08 13:48:18 · 5 answers · asked by Anonymous

Ten points for the best answer! = )

2006-12-08 13:37:08 · 11 answers · asked by *~SoL~ * Pashaa del Ñuñcaa. 4

don't know anything about it. except the definition. which is the rate at which an object is moving at a given moment in time. by the way what does df(t) mean?

2006-12-08 13:17:14 · 3 answers · asked by Flirtie 1

2006-12-08 13:05:08 · 2 answers · asked by kevin persad 1

1. Ultrasonic waves have many applications in technology and medicine. One advantage is that large intensities can be used without danger to the ear. Cite another advantage of their short wavelength. (Hint: Why do microscopists use blue light rather than white light to see detail?)

2. If the distance from a bugle is tripled, by what factor does the sound intensity decrease? Assume that no reflections afffect the sound.

3. A rule of thumb for estimating the distance in kilometers between an observer and a lightning stroke is to divide the number of seconds in the interval between the flash and the sound by 3. Is this rule correct? Defend your answer.

4. Why will marches at the end of a long parade following a band be out of step with marchers near the front?

2006-12-08 13:02:14 · 3 answers · asked by Anonymous

it is a science question. I can't seem to find the equation/formula anywhere.

2006-12-08 13:00:56 · 5 answers · asked by Flirtie 1

Why does sound travel faster in moist air? (Hint: at the same temperature, water vapor molecules have the same average kinetic energy as the heaveier nitrogen and oxygen molecules in the air. How, then, do the average peeds of H2O molecules compare with those of N2 and O2 molecules?

2006-12-08 12:39:52 · 6 answers · asked by Anonymous

2006-12-08 12:17:55 · 7 answers · asked by Anonymous

Atom A has 8 protons, 9 neutrons, and 10 electrons. What is the atomic mass of atom A?

Does anyone know this answer/how to calculate atomic mass?? Thanks!

2006-12-08 12:16:28 · 3 answers · asked by lalamaso 1

2006-12-08 12:10:12 · 7 answers · asked by John V 1

Me and my friend have been wondering about this... soo, if you have a huge car, like an SUV, and a bowling ball, and you roll them both so they are both going at the same speed, which one will slow down first? One of us thinks it's the ball, cause it has less force pushing it, but the other thinks it's the SUV cause, being heavier, it has so much more friction. What do you think? My physics teacher might have told us, but we can't remember the answer... haha. Thanks!

2006-12-08 11:44:37 · 5 answers · asked by person 3

2006-12-08 11:39:53 · 3 answers · asked by Anonymous

..using a digital camera..found lots of sites that describe in detail producing interferograms using film with split-beam mini lasers, but nothing for digital set up.

2006-12-08 11:39:51 · 4 answers · asked by troothskr 4

if the wind is blowing southward at 90.0 km/h, what must be the orientation and speed of an airplane if the pilot wishes to fly at a velocity with respect to the ground of 880 km/h westward?

2006-12-08 10:58:50 · 1 answers · asked by Fatima 1

2006-12-08 10:57:09 · 2 answers · asked by Jessica T 2

2006-12-08 10:49:44 · 13 answers · asked by Tony 4

Also... do they have the documentry at blockbuster so i can rent it, i have been watching youtube clips on it and its changing the way i think, its blown me away....

I really wanna know more because this is just simply amazing...

2006-12-08 10:47:03 · 4 answers · asked by Aaron T 2

The problem is:
Determine the maximum force P that can be applied to the a box weighing 400lb on an inclined plane. The incline plane is 20 degrees. The force P is applied pulling the box upward 30 degrees above the inclined plane. Static friction is 0.3.

2006-12-08 10:46:11 · 1 answers · asked by Ron DMC 2

What would happen if you stepped off the 'cliff' edge?

2006-12-08 10:22:51 · 7 answers · asked by interested_party 4

That would be so cool.

2006-12-08 09:41:04 · 10 answers · asked by Buster 3

2006-12-08 09:10:19 · 3 answers · asked by stp52x 3

what is it

2006-12-08 09:05:18 · 3 answers · asked by pablo p 1

if the sun were to vanish, would the gravitational force continue for the same period as the light, about eight minutes?

2006-12-08 08:17:51 · 9 answers · asked by paul j 1

2006-12-08 08:11:43 · 5 answers · asked by chib1 1

will spinning clockwise take it away? Or vice-versa?

2006-12-08 07:57:27 · 3 answers · asked by Anonymous