Physics - November 2006

and an energy source is required in order to perform work, what is the energy source for the force of gravity?

2006-11-03 06:45:13 · 7 answers · asked by Anonymous

the magnitude of the forces acting acting before n after cell division? what are dimensional changes that occur during cell division?

2006-11-03 06:32:35 · 2 answers · asked by Anonymous

with a radius of 0.499 m and mass of 10.1 kg is brought to an angular speed of 5.88 rad/s in 0.531 s by a motor exerting a constant torque. After the motor is turned off, the flywheel makes 26.8 rev before coming to rest because of friction (assumed constant during rotation).

What percentage of the power generated by the motor is used to overcome friction?

2006-11-03 06:28:22 · 1 answers · asked by Dee 4

2006-11-03 06:16:32 · 8 answers · asked by Anonymous

why does speed of sound change if the temp increases as it results in a decrease in density of air but the speed of sound increases through denser substances and reduces in rarer substances.

2006-11-03 06:01:33 · 2 answers · asked by Richard 3

why does light acquire a diferent light if it is passed through a different coloured transparent substance

2006-11-03 05:58:36 · 3 answers · asked by Richard 3

In a home laundry drier, a cylindrical tub containing wet clothes rotates steadily about a horizontal axis, as in Figure P7.63. The clothes are made to tumble so that they will dry uniformly. The rate of rotation of the smooth-walled tub is chosen so that a small piece of cloth loses contact with the tub when the cloth is at an angle of 68.0° above the horizontal. If the radius of the tub is 0.340 m, what rate of revolution is needed?

2006-11-03 05:40:07 · 1 answers · asked by RunmanJr2 2

1. Suppose a driver springs into the air with no initial angular velocity. can the driver begin to rotate by folding into a tucked position?

2. Suppose a torque rotates your body about one of three different axes of rotation: case A, an axis through your spine; case B, an axis through your hips; case C, an axis through your ankles. Rank these three axes of rotation in increasing order of the angular acceleration produced by the torque.

3. A fish takes a bate and pulls on the line with a force of 2.1 N. The fishing reel, which rotates without friction, is a cylinder of radius 0.055 m and mass 0.84 kg. (a) What is the angular acceleration of the fishing reel? (b) How much line does the fish pull from the reel in 0.25 s?

2006-11-03 05:28:00 · 1 answers · asked by AnnaQ 1

ie if more light was going in that coming out

2006-11-03 05:22:43 · 2 answers · asked by lucasbuckteacher 1

2006-11-03 05:17:38 · 2 answers · asked by naurinbutt 1

I remember watching a documentary about it once but I would like some more information on the subject please.

2006-11-03 05:11:43 · 5 answers · asked by iPhaze 1

3 kg object attached to a horizontal spring oscillates with A=10cm and f = 2Hz. find...
a) force constant of the spring
b) period
c) max speed
d) max acceleration

2006-11-03 05:11:16 · 2 answers · asked by ry 1

A wheel 2.00 m in diameter lies in a vertical plane and rotates with a constant angular acceleration of 4.00 rad/s. The wheel starts at rest at t = 0, and the radius vector of a certain point P on the rim makes an angle of 57.3 with the horizontal at this time. At t = 2.00 s, find (a) the angular speed of the wheel, (b) the tangential speed and the total acceleration of the point P, and (c) the angular position of the point P

2006-11-03 03:34:16 · 4 answers · asked by Anonymous

did he inent the light bulb

2006-11-03 03:26:55 · 31 answers · asked by david d 1

In a ballistics test, a 25 g bullet traveling horizontally at 1200 m/s goes through a 30 cm thick 350 kg stationary target and emerges with a speed of 850 m/s. The target is free to slide on a smooth horizontal surface.


(a) How long is the bullet in the target?

(b) What average force does it exert on the target?
N (magnitude only)

(c) What is the target's speed just after the bullet emerges?
m/s

2006-11-03 02:47:58 · 2 answers · asked by Anonymous

2006-11-03 02:40:30 · 4 answers · asked by Anonymous

We just finished a series of experiments in the lab where we tried several different settings on the oscilloscpe (changing time, waveform, amplitude, etc), but we were not told how to determine this during the class.
However, an answer to this question is required in our lab report.

Thanks in advance, I will choose a best answer!

2006-11-03 02:40:14 · 2 answers · asked by BugGurl 3

Given that the limiting velocity in our universe is the speed of light and tachyons move at greater than light speed and can never slow down to light speed, therefore being doomed to exist (if at all) forever beyond our event horizon how can their existence ever be proved? And if proof of their existence is not possible then is belief in their existence similar in kind to a belief in God, i.e., requiring faith? So just what is the role of tachyons in contemporary physical theory?

2006-11-03 02:30:20 · 7 answers · asked by Seeker 4

Because I have studied that the resistance of a wire depends on its length, thickness and the material. Now even if the wire is coiled, the length dosen't increase, neither does the thickness and it is the same material.

2006-11-03 02:26:28 · 7 answers · asked by lubricants_99 1

2006-11-03 02:23:28 · 1 answers · asked by Tarshall J 1

The motorcylist is riding his motorcycle up and down a hill. The question was how fast can he can before he loses touch with the ground? I was told that the weight has to be more than the normal force to keep him on the ground and to determine the maximum speed and we use a zero quantity for the normal force. Why?

2006-11-03 01:02:07 · 4 answers · asked by Beth H 1

2006-11-03 00:38:29 · 14 answers · asked by Anonymous

quintessences is having the ablity to fire lightning and make object come alive!

2006-11-02 23:54:12 · 4 answers · asked by violeta s 1

I am doing Physics I. I would need to know the average force of air friction as it acts on it as it falls?

2006-11-02 23:45:19 · 6 answers · asked by Marla M 1

2006-11-02 23:29:57 · 10 answers · asked by Anonymous

i have a question about the Spherometer , i want to know how to get this equation , ( in full details please !!)

R = (S^2)/6a + a/2

2006-11-02 23:05:45 · 2 answers · asked by mr. h 1

2006-11-02 22:29:59 · 4 answers · asked by muhammaddarwish 2

2006-11-02 22:29:57 · 3 answers · asked by Anonymous

2006-11-02 22:20:58 · 8 answers · asked by mike b 1

2006-11-02 22:03:15 · 10 answers · asked by shainy p 1