Physics - December 2006

2006-12-17 16:26:23 · 8 answers · asked by 1/Cos c 2

You drop a ball from 2.0 meters and it bounces back to height of 1.5 m. What is the ball's speed just as it leaves the ground after the bounce? Please teach me HOW to get to the answer (which is 5.4 m/s cuz i keep getting sqrt(40)

2006-12-17 15:59:40 · 4 answers · asked by JitterBug589 3

The mass of the baseball is 0.145 kg.
It is pitched at 45.0 m/s and is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s.
The contact time between bat and ball is 3.00 X 10 ^ (-3) s.

Can't get this... please help ASAP!!!

2006-12-17 15:37:57 · 1 answers · asked by abc123 1

our physics teacher asked that question to us and none of us got the correct answer he wont even want to tell us... shockz...

2006-12-17 15:23:00 · 10 answers · asked by Akoh 2

2006-12-17 14:56:27 · 5 answers · asked by Curious George 1

What is the effective force constant for a simple pendulum of mass 1.2 kg and length 1.67 meters?

2006-12-17 14:52:40 · 1 answers · asked by Astalav 1

Is the relationship between pressure (cause) and motion of molecules in a gas (effect) inverse or direct?

2006-12-17 14:16:18 · 6 answers · asked by CodyBJ 2

2006-12-17 13:56:59 · 2 answers · asked by jset1989 2

I think that it would be 7,500 N on the end closest to the vehicle and 2,500 N on the far end - does this seem right?

2006-12-17 13:40:40 · 1 answers · asked by Minty 1

2006-12-17 13:36:46 · 24 answers · asked by Z_Man B 1

A tin can is filled with water to a depth of 32 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 29° above the horizontal.
a)Find the range of this stream of water
b)Find the maximum height above the exit hole of this stream of water.
answer in meters please

2006-12-17 13:33:22 · 2 answers · asked by Anonymous

can u show me how u worked it out too!

2006-12-17 13:30:42 · 2 answers · asked by bhangraking777 1

2006-12-17 13:08:42 · 6 answers · asked by Kitiara_DSev 2

A piece of wood furniture was being painted at my shop. it was sprayed with nitro cellulose sealant. The painter then sanded the surface, looked down for some sand paper or to show something to one of his partners and all of a sudden a fireball blasted, almost reaching a 20 feet roof. Luckily, no one was harmed, and apparently, the wood cabinet didn't suffer that much, and it can be restored, but i need to know if such thing is possible and why, because is a very dangerous thing to happen, and i also need to know if this guy was smoking or something.

2006-12-17 12:54:41 · 2 answers · asked by ottowilcken 2

I'll use values to try and get my question across. If a 1 kg block is being dropped straight down, will it have the same potential energy as a block attached to a 1m string being dropped from 90 degrees assuming it stops at 0 degrees? Assuming I did the calculations properly (1 x 9.81 x 1) the potential energy should be 9.81 for free fall. Would this be the case in the other situation?

2006-12-17 12:32:07 · 3 answers · asked by Evan M 1

My question is a general question and has nothing to do with just our earth. This is kind of like asking if there is a starting point and an ending point in our universe.

2006-12-17 12:24:20 · 11 answers · asked by PeripateticNomad 2

need the direction

2006-12-17 12:23:22 · 4 answers · asked by Jose C 1

2006-12-17 11:52:04 · 6 answers · asked by Anonymous

2006-12-17 11:36:57 · 13 answers · asked by Jose C 1

A block starts at rest and slides down a fric-
tionless track.
The acceleration of gravity is 9.81 m/s2 .
It leaves the track horizontally, striking the
ground.

a) At what height h1 above the ground is the
block released? Answer in units of m.


Givens: h2(second height)=2.6m
Mass m of block = 481g
After leaving the track the block lands 5.2m away from the
point it leaves.



What is the speed of the block when it
leaves the track? Answer in units of m/s

What is the speed of the block when it hits
the ground? Answer in units of m/s.

2006-12-17 11:28:42 · 1 answers · asked by TheThing 2

The law of conservation of matter says that matter can be destroyed nor crated..then how come energy is created when anergy is created when an atomic bomb explotes.E=mc2..I'm confused, can you explain this to me?

2006-12-17 10:50:25 · 7 answers · asked by Just 2

A project to build a huge machine called the 'Super Conducting Super Collider' that would have explored the nature of matter and energy, was cancelled in 1993. What do you think it would have explored if it had been built. The advancement of human knowledge requires that investments should be made in projects like these. It sure was expensive but it would have cost a fraction of the money that nations invest in weapon systems. What were the reasons for its cancellation.

2006-12-17 10:40:31 · 2 answers · asked by ABC X 2

I need to shoot a ping pong ball 5 meters at a target using some launcher contraption that i make, and i can't just catapult it, it has to have some sort of switch to make it launch and i have no idea where to start

2006-12-17 10:13:24 · 7 answers · asked by Sarah 1

(Cp1)(M1)(Tf-T1)=(Cp2)(M2)(Tf-T2)

This the formula is in calorimetry.

2006-12-17 09:37:34 · 3 answers · asked by SHAKIL A 1

i have 3 problems i cant solve due tomorrow and are graded...Please include how to get to the answer

1.A 5.0kg is moving 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring the spring is compressed a maximum distance of .68m. What is the speed of the block when the spring is compressed to only one-half the max distance


2.A block of mass M is moving along the horizontal frictionless surface with a speed of 5.7 m/s. If the slope is 11(degrees) and teh coefficiant of kinetic friction .26 how far does the block travel up the incline

3A block of 2.0kg is placed on a compressed vertical spring that is compressed .050m the spring is released and it propels the block vertically upward. when the block has risen .60m above its initial postion its velocity is 1.7m. how much potential energy was stored in the spring


Thanks feel free to answer one or all i'll take all the help i can get...

2006-12-17 09:16:39 · 5 answers · asked by mcgee8144 2

air-filled baloon is weighted (added a weight at the bottom) so it sink in water. near the surface the balloon has a certain volume. at the bottom, is the balloon smaller or larger or same in size? as the weighted balloon sinks, what happens to its density? what happens to its buoyant force?

2006-12-17 09:14:49 · 3 answers · asked by Anonymous

2006-12-17 09:07:55 · 7 answers · asked by rodney m 1

what is the final temperature when a 3kg gold bar at 99 degrees celsius is dropped into .22kg of water at 25 degrees celsius?

2006-12-17 09:06:07 · 2 answers · asked by SHAKIL A 1

http://i143.photobucket.com/albums/r147/rAOL87/circuit1.jpg

Above is a given circuit in which I need to solve for Vb, I1 and I2. I am given Vcc, R6, R7, and Beta. If anyone knows the steps to solving this problem, could you please post them?

thanks in advance!

2006-12-17 09:03:59 · 1 answers · asked by Anonymous

scientists were able to make an atom where the negative part was heavier - antimatter. who made this experiment? how did they carry out the experiment? and how long did it last?

2006-12-17 08:15:33 · 4 answers · asked by soccergurl040709 2