Physics - October 2007

2007-10-07 03:50:55 · 2 answers · asked by kishore r 1

2007-10-07 02:59:15 · 3 answers · asked by starkey 1

2007-10-07 01:20:49 · 3 answers · asked by Anonymous

From a Physics stantpoint. And be honest:

http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=GroundPounder.jpg

2007-10-07 00:37:50 · 9 answers · asked by Anonymous

2007-10-07 00:29:58 · 3 answers · asked by d****** 1

Which have the most advanced laboratory in physics?

2007-10-07 00:00:29 · 5 answers · asked by andrei.teller 1

Suppose that you don't know that the relation,
mechanical work W=F.S.

In this circumastances can you derive the equation Ek=1/2mv^2 (without using the relation W=F.S)?

I think any of the two relation (W=F.S and Ek=1/2mv^2) is axiomatic and they are circular. So that you can't get one of them without using the other. When one of them is defined axiomaticaly you can get the other.
Am I correct? please inform me!!

2007-10-06 23:52:50 · 1 answers · asked by Anonymous

2007-10-06 22:59:52 · 2 answers · asked by Anonymous

If you were to shoot a bullet, then slow down time and stand infront of the bullet, would it it you with the same amount of force as before you slowed down time?

Say you were to somehow distort space/time for only yourself, and someone fires the gun, and you slow down all time for yourself; The people in the original space/time see the bullet blow your brains out, but would it actually hit you like it would without time slowed down? If it doesnt, what would happen if you were to undistort your space/time? Would you see yourself dead on the ground and also be standing infront of everyone?

2007-10-06 20:46:58 · 5 answers · asked by Anonymous

how long would it take to cover 21 feet going 20 mph? 27ft going 20? can someone remind me how to do these problems so i can do the rest of them?

2007-10-06 20:43:04 · 4 answers · asked by sleepy4life 1

and the spring is compressed 10 cm. The spring is released and the block is propelled directly toward another horizontal spring with a force constant of 265 N/m. a) What is the speed of the block when it has traveled 0.5 cm from its point of release? b) What is the speed of the block when it is not in contact with either spring? c) How far does the block compress the second spring?

2007-10-06 20:40:29 · 2 answers · asked by ama 1

2007-10-06 20:18:20 · 2 answers · asked by cute_lass585 1

2007-10-06 20:09:58 · 1 answers · asked by cute_lass585 1

2007-10-06 20:08:43 · 2 answers · asked by cute_lass585 1

Why do some physics professors use 9.8 and some use 9.81 m/s^2 for the acceleration due to gravity on Earth?

2007-10-06 19:23:19 · 5 answers · asked by Bad M 2

2007-10-06 19:17:26 · 17 answers · asked by Anonymous

A 44 kg box is being pushed a distance of 7.0 m across the floor by a force whose magnitude is 163 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by each force.

frictional force is what i need to find
i found applied already

2007-10-06 18:06:15 · 1 answers · asked by Unkown 2

A skydiver without a parachute jumps out of a plane 4000 ft. above the ground and quickly reaches a terminal velocity of 250 ft./sec.The skydiver's pet falcon flies back and forth between the skydiver and the ground at 500 ft/sec.How far has the falcon flown when the skydiver reaches Earth?

2007-10-06 17:28:01 · 4 answers · asked by Livelife 1

Assuming the height from the bottom to the water fountain spout(the point that actually releases water) was "H", distance the water travels horizontally is "F", highest point the water reaches is "P", and time it takes from the spout to the bottom of the pan is "T".

I know that I have to use these equations and use either Sin, Cos, or Tan to find the apex.
V=d/t
A=deltaV/T
v=initialV +at
v^2=initialv^2 + 2ad
d=initald +initalv(t) + 1/2 at^2

Some steps on how I would go on solving the problem would be helpful.
Thanks in advance!

2007-10-06 16:58:15 · 4 answers · asked by Jessica 5

What are vacuum tubes?
How do they function?

Can sbdy explain the "vacuum" part of it?

Basic and intuitive way to understand..?

2007-10-06 16:29:04 · 8 answers · asked by learner 1

What is the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 2.8 m and is released with a speed of 13 m/s ?

Please explain

2007-10-06 16:13:34 · 3 answers · asked by Anonymous

1. Two numbers are reciprocals if their product is equal to 1. If x and y are reciprocals and x is greater than 1, then y must be....
a. less than -1
b. between 0 and -1
c. equal to 0
d. between 0 and 1
e. greater than 1

2. A number line that includes every number
-infinity to -1(included) then begins again at 3(included) to infitity is represented by...
a. -1 is less than or equal to x AND 3 is
less than or equal to x
b. -1 is less tahn or equal to x AND 3 is
greater than or equal to x
c. -1 is less than or equal to x OR 3 is less
than or equal to x
d. -1 is greater than or equal to x OR 3 is
less than or equal to x
e. -1 is greater than or equal to x OR 3 is
greater than or equal to x

2007-10-06 15:33:01 · 1 answers · asked by Anonymous

Using the definition of the scalar product, find the angles between the following pairs of vectors.
(a) A = - 3 i + j k and B = 2 i j - 3k


(b) = 2i - 3 j k and = - 2i - j - k


(c) = - 4i + 5 j k and = 3i + 4j - k

2007-10-06 14:40:45 · 2 answers · asked by surfing86 2

Vyt - gt^2/2 = h - gt^2/2
simplify the expression above and slove for h in terms of Vy and t
t=d/Vy substitute this value for t into your simplified equation.
Vx= v cos(angle) and Vy= sin(angle) subtitute these values for Vx and Vy in your current equation and simplify. divide both sides by d and you should have aand expression equivalent to tan(angle)= h/d
so how does all this work. I want explanations.

2007-10-06 14:17:51 · 2 answers · asked by simpukka 1

a.) heating b.) electroplating c.) lighting d.) transforming voltage

2007-10-06 14:05:40 · 2 answers · asked by -bEtTy- B 1

is it a.) circuit b.) charge c.) voltage d.) resistor

2007-10-06 13:58:00 · 4 answers · asked by -bEtTy- B 1

What about at its weakest? If so, when?

2007-10-06 13:57:20 · 4 answers · asked by Doc Biz 4

You're driving down the highway late one night at 20 m/s when a deer steps onto the road 35m in front of you. Your reaction time before stepping on the brakes is 0.5s and the maximum deceleration of your car is 10m/s^2.

How much distance is between you and the deer when you come to a stop?

2007-10-06 13:50:51 · 5 answers · asked by Anonymous

2007-10-06 12:26:27 · 1 answers · asked by Boris G 1

I'm really confused, can someone help me please with this question, or explain how to do it

Pluto the dog jumps between 2 buildings
1) in the first stunt, the buildings are 40m above ground and the gap between them is 6m. If the dog takes off at 8m/s what range of angles to the horizontal must he take off at in order to complete the jump?

2)in the 2nd stunt the gap between the buildings is 8m, but a takeoff ramp is provided. show my differention that if the dogs take off speed is V0, the maximum range occurs for takeoff angles of 45degrees.

3)find the minumum takeoff speed at which the dog can make the 8m jump.

Please help me!

2007-10-06 11:52:02 · 1 answers · asked by Hayley* 3