Physics - September 2007

I read that scientists are able to split a couple of sub-atomic particles, which normally exist together, place these particles in different laboratories and manipulate one of them, resulting in exactly the same changes occuring in the other one, despite it being physically seperated. Could anyone tell me a little more about these experiments please. Thankyou.

2007-09-05 21:30:20 · 1 answers · asked by Anonymous

If a nuclear bomb was dropped in point A, and the wind was blowing towards a town in point B, would the people in the town receive any cancer or effects of the blast?

2007-09-05 20:34:56 · 12 answers · asked by DIIV 3

A grasshopper makes four jumps. The displacement vectors are (1) 22.0 cm, due west; (2) 27.0 cm, 43.0 ° south of west; (3) 29.0 cm, 59.0 ° south of east; and (4) 26.0 cm, 54.0 ° north of east. Find (a) the magnitude and (b) direction of the resultant displacement. Express the direction as a positive angle with respect to due west.

2007-09-05 20:24:15 · 3 answers · asked by lonelygirlinhell 1

2007-09-05 20:05:34 · 7 answers · asked by lara croft 2

2007-09-05 19:49:39 · 3 answers · asked by wjditv 1

2007-09-05 19:43:50 · 11 answers · asked by livedie_askme 1

Please provide reference. the person who respond the quickest with the most correct answer will get the 10 pts they derserve

2007-09-05 19:25:52 · 3 answers · asked by Donni D 2

2007-09-05 18:10:42 · 5 answers · asked by salt 1

1.A ball is thrown downward, with an initial speed of 6.34 m/s, from a height of 45.2 m. After what time interval does the ball strike the ground?


2. A dog searching for a bone walks 4.31 m south, then runs 8.93 m at an angle 22.0 north of east, and finally walks 10.0 m west. Find the magnitude of the dog's resultant displacement vector.

3.A dog searching for a bone walks 2.87 m south, then runs 22.5 m at an angle 30.5 north of east, and finally walks 5.91 m west. Find the direction of the dog's resultant displacement vector. Give your answer as an angle in degrees, with the angle measured counterclockwise from the line pointing straight East (North is 90, while South is -90).

2007-09-05 17:44:59 · 3 answers · asked by Anonymous

Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as the volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 2.9 in. of rain in 30 min on a town of area 24 km2. What volume of water, in acre-feet, fell on the town?|

2007-09-05 17:30:03 · 1 answers · asked by sugardaddy8815 1

four identical metallic object carry the following charges +1.6, +6.2, -4.8, -9.4 C. the object are brought simultaneously into contact so that each touches the other then they are separated what is the final charge each object? how many electrons make u p the final charge on each object?

2007-09-05 17:00:53 · 1 answers · asked by Foxx 1

Light travels in a vacuum at 3.00*10^8 m/. Determine the time in seconds..

Laser light is sent from Earth, reflects off a mirror on the Moon, and returns to Earth. The average Earth Moon distance is 3.84*10^5 km.

2007-09-05 16:45:12 · 1 answers · asked by lifehouse 1

The mass and radius of each wheel are 5.50kg and 0.38 m, respectively. Each wheel starts from rest and turns through an angle of 12 rad in 5.80 s. One wheel has the shape of a hoop and the other the shape of a solid disk.
(a1) What is the algebraic expression for the net external torque Στ that acts on a wheel? Express your answer in terms of the moment of inertia I and the angular acceleration α.
(b1) What is the net external torque Στ that acts on the hoop?
(c1) What is the net external torque Στ that acts on the solid disk?

2007-09-05 16:41:21 · 1 answers · asked by Anonymous

whats is the difference between :

- gas and liquid
- liquid and solid
- evaporation and condensation

2007-09-05 16:37:47 · 1 answers · asked by Anonymous

The length of each rod is 0.55 m, and the angular speed is 3.60 rad/s. The mass of the particle attached to the massless rod A is 0.68 kg. The mass of the uniform rod B is also 0.68 kg.
(a1) What is the algebraic expression for the rotational kinetic energy KER? Express your answer in terms of the moment of inertia I and the angular speed ω.
(b1) What is the rotational kinetic energy KER for rod A with its attached particle?
(c1) What is the rotational kinetic energy KER for rod B?

2007-09-05 16:36:46 · 1 answers · asked by Anonymous

Each wheel is a solid disk of mass 1.80000000000000 kg. On the horizontal surfaces the center of mass of each wheel moves with a linear speed of 6 m/s.

(b3) What is the algebraic expression for the vertical height h that the sliding wheel reaches on the incline when it comes to a momentary halt? Express your answer in terms of the potential energy Epotential, the mass m of the wheel, and the magnitude g of the acceleration due to gravity.
(b4) What is the vertical height h that the sliding wheel reaches on the incline when it comes to a momentary halt?

2007-09-05 16:18:29 · 1 answers · asked by Anonymous

Each wheel is a solid disk of mass 1.80000000000000 kg. On the horizontal surfaces the center of mass of each wheel moves with a linear speed of 6 m/s.

(b1) What is the algebraic expression for the vertical height h that the rolling wheel reaches on the incline when it comes to a momentary halt? Express your answer in terms of the potential energy Epotential, the mass m of the wheel, and the magnitude g of the acceleration due to gravity.
(b2) What is the vertical height h that the rolling wheel reaches on the incline when it comes to a momentary halt?

2007-09-05 16:17:38 · 1 answers · asked by Anonymous

Each wheel is a solid disk of mass 1.80000000000000 kg. On the horizontal surfaces the center of mass of each wheel moves with a linear speed of 6 m/s.
A) What is the algebraic expression for the total kinetic energy KEtotal of the rolling wheel? Express your answer in terms of the mass m of the wheel and the linear speed v of the center of mass of the wheel.

B) What is the total kinetic energy KEtotal of the rolling wheel?

2007-09-05 16:15:21 · 2 answers · asked by Anonymous

if the big bang had not occurred would their be time or space?

2007-09-05 15:57:25 · 7 answers · asked by gruis 1

2007-09-05 15:36:09 · 2 answers · asked by redalert 2

A basketball player runs down the court, following the path indicated by the vectors A, B, and C in Figure 3-38. The magnitudes of these three vectors are: A = 8.0 m, B = 17.0 m, and C = 7.0 m. Let the +x axis point to the right and the +y axis point to the far side of the court.

The arrow is pointing downward on the line to the left and it equals 8m. The arrow in the middle is pointing upward and it equals 17m. The arrow at the right is pointing down and to the right and it equals 7m.

l / l
l / l

Conect the lines and it almost looks like an s turned sideways. The angle of the slanted line is 45 degrees and the straight line to the right is 30 degrees.

2007-09-05 15:09:37 · 1 answers · asked by Anonymous

2007-09-05 15:05:30 · 2 answers · asked by Jess L 1

I have read Einstein's and other's theories on the subject, but I was wondering if there was any recent studies conducted...I just wish it was possible.

2007-09-05 14:46:40 · 4 answers · asked by Wraychill 2

Add the following three vectors together. Show the vector addition graphically. Calculate the magnitude and direction of the resultant vector.

A = 450m at 20 degrees, B = 25m at 270 degrees, C = 230m at 70 degrees

2007-09-05 14:30:12 · 1 answers · asked by junior_002 1

truck

2007-09-05 14:26:03 · 3 answers · asked by coolguy 1

water, but they must clear rocky outcrops at water level taht extend out into the water about 5 m from the base of the cliff directly under their launchpoint. What minimum pushoff speed is necessary to do this? How long are they in the air?

2007-09-05 14:22:33 · 1 answers · asked by J L 2

A force vector has a magnitude of 544 newtons (N) and points at an angle of 39.5° below the positive x axis.
What is the algebraic expression for the x scalar component Fx of the force vector? Express your answer in terms of the magnitude F of the force vector and the angle θ that specifies the direction below the positive x axis. Remember that scalar components can be positive or negative, depending on whether they point, respectively, along the positive or negative axis.

2007-09-05 14:22:19 · 1 answers · asked by Anonymous

2007-09-05 14:20:30 · 1 answers · asked by kristy 4

2007-09-05 14:16:09 · 1 answers · asked by Anonymous

( hint, 1mL = 1cm(3)

2007-09-05 13:59:34 · 7 answers · asked by Anonymous