Physics - February 2007

can you please explain this for me?
thank you.

2007-02-28 13:05:29 · 1 answers · asked by cybernetic2024 1

Mathematically, the magnitude of the momentum of an object is equal to the derivative of its kinetic energy with respect to its speed. What physical implications does this have?

2007-02-28 13:01:40 · 1 answers · asked by Anonymous

Tarzan swings on a 25.0 m long vine initially inclined at an angle of 41.0° with the vertical. What is his speed at the bottom of the swing if he does the following?

(a) He starts from rest.
10.9632 m/s
(b) He pushes off with a speed of 4.00 m/s.
_____ m/s

2007-02-28 13:01:23 · 2 answers · asked by Khoi 1

I have to do my homework, and I can't read the letters, since they are too light. I can't find the manual, so can someone please help me? please and thankyou.

2007-02-28 12:49:40 · 3 answers · asked by Jellyfish.Friends 2

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. Assume the plane is traveling horizontally with a speed of 225 km/h (62.5 m/s).

Figure 3-37

(a) How far in advance of the recipients (horizontal distance) must the goods be dropped (Figure 3-37a)?
m
(b) Suppose, instead, that the plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the climbers' position (Figure 3-37b)? (Assume up is positive.)
m/s
(c) With what speed do the supplies land in the latter case?
m/s

2007-02-28 12:48:28 · 3 answers · asked by nafiseh g 1

If matter cannot travel equal to or greater than C (the speed of light, remember the speed of light is the same relative to any observer) then how can a particle accellerator aim two beams of sub-atomic particles travelling close to the speed of light at each other.

If Beam A and Beam B are traveling at 80% C then
Relative to beam A, Beam B will be travelling 160% C.

so how is this possible...

2007-02-28 12:41:56 · 7 answers · asked by cybernetic2024 1

An object slides down an inclined plane of angle 30° and of incline length 5 m. If the initial speed of the object is 5 m/s directed down the incline, what is the speed at the bottom? Neglect friction.

2007-02-28 12:23:14 · 3 answers · asked by Mike B 1

What experiments are being doen to prove supersymmetry?

2007-02-28 12:23:12 · 2 answers · asked by Anonymous

is there a simple definition as to what it is?

2007-02-28 12:22:50 · 3 answers · asked by PhyzicsOfHockey 2

2007-02-28 11:52:49 · 5 answers · asked by aj 1

Hello,
I wanna know the speed of a bullet. I have seen the other answers and one of them with kinetic energy and stuff, I mean I'm only a kid!!!!!!!!!! I don't know those big words so if you could just tell me the speed of a bullet. And if you know it for all guns pleeeeeeeeeeeeeeese let me know them. Thank U

2007-02-28 11:51:03 · 25 answers · asked by Anonymous

Here are the three questions that are really easy and see if you can answer them!

1.Name the solid and gas forms of water
2.compare and contrast or particles in solids,liquids, and gases

2007-02-28 11:48:28 · 2 answers · asked by | .Michelleee. | 1

2007-02-28 11:47:37 · 2 answers · asked by sue m 2

A block of mass 20kg is pushed against a vertical surface at an angle of 30 degrees as shown. The coefficient of friction between the surface and the block is 0.2. What is the minimum magitude of P to hold the block still?


I got 271.5 when I tried but the answer is 202.2

image link - http://img80.imageshack.us/img80/9630/mjlmwu5.jpg

2007-02-28 11:31:58 · 3 answers · asked by bollocks 2

Linear Trend line is y=3.95 x + 0.176, the plot is titled "work vs. position. Write the physics translation equation for this trend?

so y = 3.95 [Joule] x + 0.176 [meters] ???

oh and say you measured work to be 1.99 [joule]. According to the linear trend, what is the poistion value??

how do you do that?


please help thanks!!!

2007-02-28 11:31:45 · 3 answers · asked by Anonymous

2007-02-28 11:18:11 · 5 answers · asked by Ash 1

1) When sodium atoms are excited (for example, by heating salt in a flame) they emit bright yellow light at two wavelengths of 589.0 nm and 589.6 nm. That emission implies that the sodium atom has two nearby energy levels separated by only
A) 2 eV
B) none of these
C) 0.6 eV
D) 0.6 MeV
E) 2 10-3 eV

2) Which statement is NOT true for a photon?
A) none of these
B) it is electromagnetic in nature
C) it always travels at the speed c independent of frequency
D) it has wavelike properties
E) it possesses energy independent of frequency

3) Determine the vacuum wavelength, frequency, and energy in Joules of a 2.50 eV photon. What type of radiation is it?

2007-02-28 11:11:02 · 1 answers · asked by Jake D 2

A 4 Kg block is placed at rest at a vertical height of 21 meters on a plane inclined at 5o with the horizontal. If the surface is frictionless, how fast will the block be moving when it gets to the bottom of the plane?

2007-02-28 11:05:29 · 5 answers · asked by bollocks 2

acceleration of 2.15 rad/s^2?

2007-02-28 11:01:53 · 1 answers · asked by Anonymous

water does the barge sink when 300,000 kg of coal are loaded in the barge?

2007-02-28 10:50:59 · 2 answers · asked by Varun S 1

the pool, once the ice stops bobbing and floats steadily,
A) rises
B) falls
C) stays the same
D) There is not enough information to answer the question.

2007-02-28 10:49:12 · 4 answers · asked by Varun S 1

2007-02-28 10:46:47 · 1 answers · asked by andres felipe f 1

without slipping. In what order do they reach the bottom?

2007-02-28 10:44:00 · 1 answers · asked by Varun S 1

constant speed of 0.20 m/s through a distance of 0.80 m. what is the work done on the object?

2007-02-28 10:42:24 · 3 answers · asked by Varun S 1

For a certain pendulum, periods of T = .708, .8943636, 1.02536 and 1.129783 seconds are observed for respective lengths L = 4, 8, 12 and 16 units.
•Determine whether the transformation T -> T2 or T -> T3 linearizes the function better.

2007-02-28 10:35:06 · 1 answers · asked by Astalav 1

Hello all,
I wonder if I can make a hologram on a normal white paper.
I mean, is it possible that the holographic image will display under strong light?

Thanks alot!

2007-02-28 10:27:28 · 7 answers · asked by bacardi 1

water?

2007-02-28 10:14:41 · 3 answers · asked by auv529 1

If not, whats the difference when you're riding on the road?

2007-02-28 10:04:55 · 8 answers · asked by Nicknamey 1

from rear-end collisions.

2007-02-28 10:03:02 · 2 answers · asked by auv529 1

A pitcher throws a baseball to a catcher in a straight line, like any ordinary pitch. Assuming that the ball arrives to the catcher at the same speed as the pitch is thrown, which player ends up attaining a larger force, the pitcher or the catcher? And, which player ends up having the larger impulse on the ball?

Thanks in advance. Best answers to the correct response and good explanation.

2007-02-28 09:54:13 · 1 answers · asked by Jer G 3