Physics - October 2006

Looking through binoculars, would you be able to see your own back? What would travelling through the universe be like?

2006-10-05 00:25:42 · 21 answers · asked by martin48732 1

2006-10-04 23:51:05 · 5 answers · asked by volley 2

Say is there was to a a huge hole from one side of the earth to the other, throught the middle...just say there was, and someone jumped down the hole, would they stop in the middle becuase of gravity not knowing which way to pull the person?

Would this person be stuck, or are there any fources that could bring the person to the other side or bring them back?


And also knowing that the is a miricle and that it can be done... jump ignore the logics of it all, just what if?

2006-10-04 23:19:03 · 9 answers · asked by Anonymous

2006-10-04 22:14:36 · 8 answers · asked by stitch 1

If I left in a space rocket to the moon at this very moment, how long will it take me to get there?

2006-10-04 21:26:29 · 13 answers · asked by Sir1976 1

What exactly are electromagnetic waves?

2006-10-04 21:01:34 · 5 answers · asked by Omega_sages 2

2006-10-04 20:21:47 · 9 answers · asked by Anonymous

2006-10-04 20:16:19 · 8 answers · asked by Anonymous

2006-10-04 19:20:34 · 25 answers · asked by sanjeev k 1

2006-10-04 18:48:37 · 5 answers · asked by jayantishailendra 1

If a cat always lands on its feet and buttered toast always lands butter side down. Could I get a cat and attatch one piece of buttered toast butter side up to each paw of the cat then picked the cat up and dropped it would the butter side up toast and the cat paws kinda act like like poles of a magnet and repel each other leaving the cat to kinda levitate a few inches above the floor or possibly rotate constantly along its latitudinal axis thus creating an anti gravity machine?

2006-10-04 18:30:28 · 10 answers · asked by Anonymous

2006-10-04 18:17:54 · 7 answers · asked by Anonymous

A bob of mass m is suspended from a fixed point with a massless string of length L (i.e., it is a pendulum). You are to investigate the motion in which the string moves in a cone with half-angle theta.

What tangential speed, v, must the bob have so that it moves in a horizontal circle with the string always making an angle theta from the vertical?

Express your answer in terms of some or all of the variables m, L, and theta, as well as the acceleration due to gravity g.

2006-10-04 17:03:29 · 5 answers · asked by agnobles 2

d = d0 + v0t + ½ a t2
v = v0t + a t
v2 = v02 + 2ad

A car accelerates from 5 m/sec to 10 m/sec with an acceleration of 1 m/sec/sec.
a. How far did the car travel during this acceleration?

I don't need the answer to this problem, I would really just like how to get this problem going. The equations on top are the ones I need to use and I have no idea where to start. Any help is great.

2006-10-04 16:58:07 · 8 answers · asked by braillehand 1

Two masses are connected by a light string passing over a light, frictionless pulley as in Figure P5.63. The m1 = 5.45 kg object is released from rest at a point 4.00 m above the floor, where the m2 = 2.55 kg object rests.

Figure P5.63

(a) Determine the speed of each object when the two pass each other.
3.80 m/s
(b) Determine the speed of each object at the moment the 5.45 kg mass hits the floor.
5.33 m/s
(c) How much higher does the 2.55 kg mass travel after the 5.45 kg mass hits the floor?
m

thank you for your help!

2006-10-04 16:54:35 · 5 answers · asked by Anonymous

-constructive
-destructive
-sinusoidal waves

2006-10-04 16:07:15 · 5 answers · asked by Diego 1

A car is traveling at 49.0 km/h on a flat highway.

(a) If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop?

b) What is the stopping distance when the surface is dry and the coefficient of friction is 0.600?

please give me formulas and numbers!

2006-10-04 15:59:23 · 5 answers · asked by natasha b 1

hmmm???

2006-10-04 15:58:12 · 5 answers · asked by MarkySparky S 1

space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 110 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as their weight on Earth.]

2006-10-04 15:55:33 · 3 answers · asked by Anonymous

I have been trying this problem for a while now and i can't seem to get the right answer. i know that part a is somewhere between 4 s. and 5s. and i got 45.1 for the speed.

A stone is thrown vertically upward with a speed of 13.0 m/s from the edge of a cliff 78.0 m high (Fig. 2-32).



(a) How much later does it reach the bottom of the cliff?
s
(b) What is its speed just before hitting?

2006-10-04 15:52:42 · 3 answers · asked by beast 1

How fast in RPM must a centrifuge rotate if a particle 9.00 cm from the axis of rotation is to experience an acceleration of 115,000 g's?

Please explain your answer...

2006-10-04 15:46:08 · 6 answers · asked by Anonymous

If i have a target initial velocity for a pebble i want to slingshot, how do i determine how far back to pull the slingshot? it must depend on the rubber band, right, sort of like the spring constant?

2006-10-04 15:40:26 · 2 answers · asked by need help! 3

How many meters above the ground would a person ( 182 lb ) have to climb to gain 3 kilojoules ( 3000 joules ) of potential energy. We usually measure our weight ( W = mg ) in pounds. For conversions, you may need to know that 1 pound is equal to 4.448 Newtons.

2006-10-04 15:33:19 · 3 answers · asked by Anonymous

that makes a 34 degree angle with the ground. The man pulls with a force of 43.2 N. The sled moves 29.7 m in 4.9 s.

What is the man's power? Answer in W.

2006-10-04 15:31:00 · 1 answers · asked by Dee 4

ok, i asked something similar earlier...and people answered that to find your velocity you do d/t which is fine, but in this case i'm not throwins straight and theres a bunch more involved so....

Heres the deal: I have:

Dx= 5.45m
t=1.97s
Vx = 2.76 m/s
Vf= 0 m/s
a=g

Now...how do I find either V or Vy to get the missing side and calculate how fast i throw in mph?

I honestly can't figure this out...please help

2006-10-04 15:30:39 · 3 answers · asked by tripp 1

what does larger wheels in diameter do to a car, and what about cars with wider tyres?

2006-10-04 15:21:17 · 8 answers · asked by dennis s 3

Whats the equation?

2006-10-04 15:07:40 · 2 answers · asked by tripp 1

Can you show or explain to me how you do this.

This is a three part question. But i need the maximum height to the three problems right?

A stone is thrown vertically upward with a speed of 13.0 m/s from the edge of a cliff 78.0 m high

I got 63.7 m
But i think i have to add it to the height of the cliff= 78 m +63.7 m= 141.7m (maximum height?)

2006-10-04 13:48:49 · 3 answers · asked by beast 1

Can you also show work and explain how you got the answer thanks!


A helicopter is ascending vertically with a speed of 6.00 m/s. At a height of 195 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
s

2006-10-04 13:23:01 · 4 answers · asked by beast 1

2006-10-04 12:42:50 · 4 answers · asked by Anonymous