Physics - June 2007

i have some idea abt this thin but i want to know more abt it so plez guide me.......

2007-06-06 08:01:41 · 2 answers · asked by nagar k 1

X = V/a ( 1- e^-at )
V is a constant
a is + ve (a>0)
find the dimensions of V and a

2007-06-06 07:21:27 · 1 answers · asked by rocky alsatian 1

If an object is thrown at 45 degrees, is maximum distance achieved?

2007-06-06 07:07:14 · 9 answers · asked by Shane O' Casey 1

Rabbit at rest noticed a wolf running with
constant speed 20 m/s at distance 20 m.

What must be constant acceleration of the
rabbit to escape from the wolf?

2007-06-06 06:52:25 · 9 answers · asked by Alexander 6

If there was no Mr. Newton, then would there have been no gravity?

2007-06-06 06:19:07 · 13 answers · asked by Anonymous

2007-06-06 05:35:21 · 22 answers · asked by Anonymous

2007-06-06 05:23:39 · 6 answers · asked by goring 6

Whats the difference between apparent weightlessness and having no weight?

Does an athlete clearing the bar in a high jump experience apparent weightlessness?

I feel that a parachutist descending at terminal velocity with the parachute open experiences apparent weightlessness but the book says that he doesn't. Why?

How do you find the change in momentum of an object in circular motion? I just sort of remembered it as 2mv but I don't know how to calculate since I think it is zero because
change in p= m(v-u) since v and u are in the same direction after completing the circle shouldn't change in p be zero???

Try to explain as clearly as possible!

2007-06-06 05:09:44 · 7 answers · asked by Anonymous

You are determining the period of oscillation of a pendulum. One procedure would be to measure the time for 20 oscillations, t20, and repeat the measurement 5 times. Another procedure would be to measure the time for 5 oscillations, t5, and repeat the measurement 20 times. Assume, reasonably, that the error in the determination of the time for 20 oscillations is the same as the error in the determination of the time for 5 oscillations. Calculate the error in the period for both procedures to determine which will give the smallest error in the value of the period?

2007-06-06 04:36:42 · 3 answers · asked by Anonymous

are there any theories or anything i could read (not interested in books just internet articles) about matter transportation

2007-06-06 03:56:54 · 4 answers · asked by Anonymous

If you know who I'm talking about, what would you guess the he does for a living? I'm going with:






































College Professor

2007-06-06 03:53:00 · 2 answers · asked by ? 5

If it were possible to shoot a round from a standard firearm say a Beretta or a 357 magnum and alter time into slow motion so a human standing close by could grab the bullet and hold onto it by its sides, return time to normal again at that instant would the human be able to stop the bullet with their own strenth?

2007-06-06 03:48:36 · 4 answers · asked by sandtrapped 1

2007-06-06 03:26:25 · 9 answers · asked by Georgia K 2

2007-06-06 02:17:04 · 13 answers · asked by Anonymous

I had a debate with a friend. It was 90 degrees outside and we were in a building with no air conditioning. She wanted to keep the lights off to keep it cooler. I said that the fluorescent light bulbs produced negligible heat and that turning them on would not make the room hotter.

2007-06-06 01:31:45 · 6 answers · asked by PseudolusX 2

2007-06-06 01:28:03 · 12 answers · asked by rocky 123456 1

hey plz provide ma wid a list if possible itz a holodayz hw so help

2007-06-06 01:04:55 · 2 answers · asked by mrinalinimahajan 1

2007-06-06 00:22:25 · 14 answers · asked by Anonymous

Looking back on the stupendous accomplishments of evoloutions, could accurate testable scientific projections be made as to future creations?

2007-06-05 22:29:16 · 6 answers · asked by james h 2

2007-06-05 19:26:07 · 3 answers · asked by anami_mahanta 1

Can soundwaves travel with lightwaves and go further faster than in the dark?

2007-06-05 19:22:24 · 6 answers · asked by bea 1

A answer will help me provide some facts for a statement I want to make conserning a hypothesis I want to prove. Nothing public just for myself.

2007-06-05 18:06:37 · 5 answers · asked by TWIZTID 1

Several resistors with equal resistances of 100 Ohms are connected in a parallel circuit. The total resistance of that circuit is 20 Ohms. How many resistors are connected in the circuit?

Most detailed answer will get 10 points.

Thanks for the help.

2007-06-05 17:58:06 · 8 answers · asked by LesJerLayne 2

2007-06-05 17:35:05 · 5 answers · asked by Anonymous

2007-06-05 17:24:39 · 11 answers · asked by Anonymous

another hot-air balloon 10 meters above the ground is rising at a constant rate of 15 meters per second. To the nearest tenth of a second, after how many seconds will the 2 balloons be the same height above the ground? (I have the answer and it is 2.9 but I don't know how to get that answer) Please help!

2007-06-05 17:01:24 · 4 answers · asked by sarah b 1

science project. explanation w/ answer if possible. thanks.

2007-06-05 16:54:31 · 3 answers · asked by lakers4lyyfe 1

2007-06-05 16:46:06 · 10 answers · asked by Anonymous

2007-06-05 16:33:49 · 1 answers · asked by Rana 1

A baseball (m=149g) approaches a bat horizontally at a speed of 40.2 m/s and is hit straight back at a speed of 45.6 m/s. If the ball is in contact with the batfor a time of 1.10ms, what is the average force exerted on the ball by the bat? Neglect the weight of the ball since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.

so..would you use
f=m(v2-v1)/t

.149kg(45.6-40.2)/1.1x10^3s
=7.31x10-4N?

this doesnt seem right..is that too small of a force from the bat? im confused about if i did this correct...and what would be my direction? away from the bat? in the negative direction?

i

2007-06-05 15:47:47 · 2 answers · asked by Kel 1