Physics - December 2007

please explain?? i don't understand how a ball will come down the same, and shotgun pellets won't

2007-12-05 04:49:12 · 4 answers · asked by Anonymous

A 1500 kg car is moving along a level road at 60 km/h

2007-12-05 04:33:26 · 1 answers · asked by Anonymous

if suppose a sine wave starts from 0degree and completes its cycle in 360 degrees .... and for the next complete cycle it will start from where it have finished and that part of the second cycle has a shape of negative of a normal sine wave...
How can we synthesize such a wave form ...??

2007-12-05 04:28:42 · 1 answers · asked by lamrin 1

Don't ask where this came from because I haven't the slightest idea. But I am not trying to rig a craps game.

In theory, is it possible that some number of dice could be placed in a cup in a precise orientation, shaken in a precise manner, and thrown with a precise velocity and come up with the same results every time. In this theoretical case, you would probably need to use a robot to control all action.

Is this theoretically possible or are there just too many randomizing elements for this to work?

2007-12-05 04:25:44 · 2 answers · asked by Justin H 7

He was studying to be an electrical engineer but now he wants to major in physics. What kind of jobs can he get after college?

2007-12-05 04:10:36 · 10 answers · asked by tink65804 2

a.) the number of electron collissions per second in the wire
b.) the drift speed of the electrons in the wire
c.) the speed of the electric field moving in the wire
d.) the resistance of the material the wire is made of

2007-12-05 04:03:28 · 7 answers · asked by Stephanie C 1

What is compressibility of water at critical point?
Why?

2007-12-05 03:55:16 · 4 answers · asked by Alexander 6

What is entropy of the gas?
(Hint: compress the gas isothermally to zero volume)

2007-12-05 03:51:25 · 1 answers · asked by Alexander 6

2007-12-05 03:29:48 · 11 answers · asked by Anonymous

2007-12-05 03:28:22 · 4 answers · asked by Alexander 6

are 4 Newton to the right and 6 Newton to the left respectively.

What is electrostatic force acting on charge Q2?

2007-12-05 03:22:34 · 2 answers · asked by Alexander 6

There's no specific problem I need solved at this time, but is there like a formula I can use to find this value?

2007-12-05 03:03:56 · 17 answers · asked by neopiancardcaptorirene 2

2007-12-05 02:45:12 · 5 answers · asked by ramesh nair 1

You testify as an "expert witness" in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill. You find that the slope of the hill is θ = 12.0°, that the cars were separated by distance d = 25.0 m when the driver of car A put the car into a slide (it lacked any automatic anti-brake-lock system), and that the speed of car A at the onset of braking was v0 = 16.0 m/s.

(a) With what speed did car A hit car B if the coefficient of kinetic friction was 0.60 (dry road surface)?
m/s

(b) What was the speed if the coefficient of kinetic friction was 0.10 (road surface covered with wet leaves)?
m/s

2007-12-05 02:40:35 · 2 answers · asked by Anonymous

The figure shows a box of mass m2 = 1.10 kg on a frictionless plane inclined at angle θ = 40°. It is connected by a cord of negligible mass to a box of mass m1 = 4.50 kg on a horizontal frictionless surface. The pulley is frictionless and massless.

(a) If the magnitude of horizontal force is 2.3 N, what is the tension in the connecting cord?
N

(b) What is the largest value the magnitude of may have without the cord becoming slack?
N

2007-12-05 02:39:02 · 1 answers · asked by Anonymous

What is the better option for the larger object in this situation and why. The collision between the two objects can not be avoided and the collision is a straight on. If an object weighing 9000lbs is traveling at 40mph and approaches an object weighing 2000lbs, should the larger object continue on its trajectory and speed at 40mph and collide with the smaller object or should it slow down to 20mph before the impact?

2007-12-05 02:31:17 · 1 answers · asked by Tickster17 1

2007-12-05 02:25:06 · 5 answers · asked by Anonymous

wheel, while 63 J of heat is removed. What is the change in internal energy of the system?

2007-12-05 01:47:14 · 2 answers · asked by MeDIGURU 1

we need this for our physics project. we need to design one. thank you

2007-12-05 00:29:06 · 2 answers · asked by Anonymous

Help to solve this problem…
A driver becomes lost and travels 12.0 km west 5.0 km south, and 8.0 km east. Find the magnitude and direction of the car’s displacement from the standing place.

2007-12-05 00:02:58 · 6 answers · asked by miaka 1

1.A space probe is sent to the vicinity of the star Capella,which is 42.2 light years from earth.A light year is the distance traveled by light in a year.The probe travels with a speed of 0.9910c. An astronaut recruit on board is 19 years old when the probe leaves earth.What is her biological age when the probe reaches capella?

2.Two events are observed in a frame of reference S to occur at the same space point,the second occurring 1.80s after the first.In a second frame S' moving relative to S,the second event is observed to occur 2.35s after the first.What is the difference between the position of the two events as measured in S'?

Please help me solve this....i really appreciate your help

thanks

2007-12-04 23:59:28 · 3 answers · asked by khenzkey_wawa08 1

2007-12-04 23:35:38 · 8 answers · asked by নà§?লà¦?ণৠ1

Question from my 7 year old.I can explain re minutes etc are a measurement of time but how FAST is it?1

2007-12-04 23:04:22 · 28 answers · asked by Anonymous

my eyesight is'nt what it used to be, therefore I'm looking for the above.in the uk

2007-12-04 21:31:28 · 2 answers · asked by David M 1

A 100 g ball is attached to a rubber tube and is spun around in a circle at a rate of one revolution every second. A force of 0.5 N is required to stretch the tube 1.0 cm.
(a) If the original length is L = 1.0 m, what will be the change in length of the rubber tube when the ball is revolving?
(b) How much energy do you expend to bring the ball off the ground to a height of 2.5m and then get it swinging at a rate of one revolution every second? Neglect the mass of the rubber tube.

2007-12-04 20:09:29 · 3 answers · asked by irinka0819 1

A 70kg diver steps off a 10m tower and drops, from rest, straight down into the water. If he comes to rest 5.0m below the surface, determine the average resistance force exerted on him by the water.

I'm pretty much bamboozled. If you could include the steps to get the answer, that would be awesome!
Thanks!

2007-12-04 18:59:04 · 1 answers · asked by mew1033 2

I'm stuck on this problem. I don't know how to do it! Please show the steps.
Thank you!

The launching mechanism of a toy gun consists of a spring of unknown spring constant. If its spring is compressed a distance of 0.120 m and the gun fired vertically as shown, the gun can launch a 20.0 g projectile to a maximum height of 20.0 m above the starting point of the projectile.

(a) Neglecting all resistive forces, determine the spring constant.

(b) Neglecting all resistive forces, determine the speed of the projectile as it moves through the equilibrium position of the spring (where x = 0)

2007-12-04 18:27:17 · 3 answers · asked by mew1033 2

A gas is compressed at a constant pressure of 0.800 atm from 8.00 L to 1.00 L. In the process, 360 J of energy leaves the gas by heat.
(a) What is the work done on the gas?
__J
(b) What is the change in its internal energy?
__J

2007-12-04 18:08:10 · 2 answers · asked by Anonymous

http://www.whatthebleep.com/crystals/

Apparently thoughts can directly affect our environment, but how can they without physical contact, without being detectable?

2007-12-04 17:51:50 · 6 answers · asked by Be My Angel :] 4

Can mechanical energy ever be transformed completely into heat or internal energy? Can the reverse happen? In each case, if your answer is no explain why not: if yes give an example.

2007-12-04 17:49:09 · 1 answers · asked by ~♥ LilPink ♥~ 2