Ship Definition and 244 Threads

The way the twin paradox is explained, the twin on the ship ages slower than the twin on Earth because he is moving at velocity with respect to the twin on earth. This makes sense from the twin on Earth's reference frame, but wouldn't the twin on the ship see it the opposite. From his...

An oil tanker's engines have broken down, and the wind is blowing the tanker straight toward a reef at a constant speed of 1.5 m/s . When the tanker is 500 m from the reef, the wind dies down just as the engineer gets the engines going again. The rudder is stuck, so the only choice is to try...

Homework Statement Two rocket ships, each with a rest length of 100 meters. Rocket 1 is at rest in frame S and has nose at x=0, tail at x = +100 meters. Rocket 2 is at rest in frame S' and has nose at x' = 0 and tail at x'=-100 meters. Suppose S' moves with speed V in the positive x...

I'm constructing a diorama of a ship sinking, and I haven't been able to find any details on the physics behind it. I'm an art student, so my knowledge in physics is limited to what I read here and in a few books at home. I'll most likely construct a fish tank that is 4'x1'x1' to contain the...

A rocket ship leaves Earth at a speed of 3/5 c. When a clock on the rocket says 1 hour has elapsed, the rocket sends a light signal back to earth. When was the signal sent according to clocks on earth? So we have T_earth and T_rocket and they are proportional. I am confused about which...

Pentagon Paid $999,798 to Ship Two 19-Cent Washers to Texas! http://news.yahoo.com/s/bloomberg/20070816/pl_bloomberg/ajkoyhuchw0m_1 How can anyone at the Pentagon not notice something like that? Or maybe everyone actually does, and it's an indication of the level of corruption in the US...

I am having difficulty in understanding the solution to the problem described below and illustrated by a rather crude Paint sketch I made: “Each propeller of the twin-screw ship develops a full-speed thrust of 600kN. In maneuvering the ship one propeller is turning full speed ahead and the...

Homework Statement Calculate the period of the Pirate ship if it were a pendulum. Homework Equations Sine laws: SinA/a = SinB/b = SinC/c Soh Cah Toa as well for 90 degrees triangles. The Attempt at a Solution http://img517.imageshack.us/img517/3668/scanrj4.jpg I've tried it on there. I...

If the Freedom ship weighs 3 million tons, wouldn't that effect the ocean with all the weight pushing down? Generally, how come things like Japan's Megafloat, which weighs 1000 tons, doesn't effect the ocean? Or does it?

Okay, for the moment, forget about time dilation. Are the following descriptions accurate if you do not account for time dilation? I've been going over and over this in my head and I can't figure out why any of these don't make sense. Setting: A ship going .99c. 1 Attached to the...

Homework Statement A battle ship (4.09*10^7 kg) fires a salvo of 3 rounds from its foward turret in the direction of the bow at an angle of 10 degrees above the horizontal. Each projectile weighs 1220 kg, each barrel is 20.9 m long and the muzzle velocity of the projectile is 770 m/sec...

Homework Statement A ship is 8km from a coast-line that stretches in an east-west direction. The navigator on the shop records that the lighthouse on the coast-line has a bearing of N27E. After sailing for 30 minutes the navigator records that the same lighthouse is 15km due north. a) What is...

A lot of news happenings today. First, the odd smell permeating New York City, now there were explosives found in a package on the Miami cruise ship and a chemical leak at plant in Sugar Land, TX. Is there any possibility that any of these are related to acts of terror? The Miami cruise...

Okay, I'm in a rut. We got a pack of physics problems from our teacher and no one knows how to go about doing them and he refuses to help us. This is the first one I've ran into major trouble with. Here's the problem: An enemy ship is on the east side of a mountainous island, as shown in...

How Does a Space Ship reenter the Earth's atmosphere at such a great rate of speed? I understand speed in this way W=F x D. there is nothing in space for the ship to propel itself off to build this great speed.

Hello there! This problem is giving me a hard time and I thought maybe one of you could give me a hint: "A ship is going upstream with a constant power P. Its speed V is relative to the water and the water's speed U is relative to the shore. The ship needs tp overcome a frictional force...

I read an article in Popular Science about a ship called the CXV (Crew Transfer Vehicle).:confused: It is made by a company called t/Space. I was wondering if anyone knew anything about it. Any help is welcome.

Lets say we have a ship 100 meters long with one person up front and one in the back, call it a 100 meter long hallway. Let us say it has attained a speed within a centimeter of the speed of light per second. Let us say that each person heads to the front or back of the ship. Wouldn't the one...

Please help me with the following question: A ship maneuvers to within 2.50 x 10 ^ 3 m of an island's 1.80 x 10 ^ 3 m high mountain peak and fires a projectile at an enemy ship 6.10 x 10 ^ 2 m on the other side of the peak. If the ship shoots the projectile with an initial velocity of 2.50 x...

A pirate ship fires two shells at two identical enemy ships. Shell A hits ship A, which is close by, and shell B hits ship B, which is farther away. The shells are fired at the same speed; neglect air resistance. Select all the statements that are true; e.g., enter AB. 1. The shell fired...

I have tried to work out how fast and how long a 50 man rowing crew could go, i think it not only depends on muscle bulk but also lung capacity, this is in relation to a 12 century ship, i have little idea of the ship design but i thought if i knew the rowing capabilities of the said crew i...

Does anyone know how big a 20MW synchronous motor would be to drive a ship's propellor?

http://www.nasa.gov/centers/goddard/news/topstory/2006/antimatter_spaceship.html" Where are they going get anti-matter and is this even possible with technology we have now

Interesting anachronism! http://news.yahoo.com/photo/060123/481/ny11701230026;_ylt=AjUD4ur5PWW22YrXD2qecFwV6w8F;_ylu=X3oDMTA3bGk2OHYzBHNlYwN0bXA-" http://news.yahoo.com/s/ap/20060123/ap_on_re_af/us_navy_pirates"

This is the story: Theseus is famous in Greek mythology as the slayer of the Minotaur, a half-man, half-bull monster who lived in the Labyrinth in the island of Crete. According to Plutarch, the ship in which Theseus sailed back to Athens was preserved for many generations, its old planks...

Can anybody help me on this one A ship sails from sea water into fresh water and therefore sinks slightly.When its load of 600000kg is removed,its returns to its original level.Assuming the sides of the ship are vertical at the water line,find the mass of ship before it was unloaded. I...

One spaceship consist of two cabins of mass M connected by rod of length 2l (ship looks like dumbbell). One of cabins was hitted by small (mass m << M), but extremely fast (velocity u) meteorite. After collision the ship starts moving and also rotating (which angular velocity omega). How far...

I think that the title of the topic is very self explanatory. I want to know what the explanation is for the different implementations, I reckon that it might have something to do with the density of air and water.

Hello all just a quick question, A mass is suspended from a spring balance in a ship sailing along the equator with a speed v. (a) Show that the scale reading will be very close to wo = (1 ± 2ωv/g), where ω is the angular speed of Earth, and wo is the weight of the mass with the ship at...

If every part of a ship is replaced once, is it still the same ship?

Is a photon akin to a battle ship plowing through the foam. not loosing energy but imparting it, via its bow wave, maybe undetectable to date as the disturbance would be Miniscule, I do not mean gravitational radiation, more a damped local oscillation as the photon pushes through the...

so when do u think the first spaceship will be built. how are they going to make it hover?

ok let's say there is a ship 100ft long moving at .90c. a planet perpendicular has guns 101ft apart at rest. the guns line of fire are parrallel to each other. the planet plans it out so that the ship will be in between the bullets when the ship flies past the planet. would the bullets hit the...

Science Channel showed last night a documentary called "Black Sky" that was a 2 hour behind the scenes look at the operations at Scaled Composities and a short history of Burt Rutan. They have footage of the construction of the carrier plane White Knight and the test flights of Space Ship One...

Energy required to accelerate a ship.. WITH ANTIMATTER! Hey, I was reading a science fiction book that had lots of fast pitched space battles, ships manoeuvring around at 8 gees and stuff, powered by antimatter :P . So I was wondering, let's say you had a ship with a mass of 1000 tonnes.. how...

A radar station locates a sinking ship at range 17.3 km and bearing 136 degrees clockwise from north. From the same station a rescue plane is at horizontal range 19.6 km, 153 degrees clockwise from north, with elevation 2.2 km. (a) write the position vector for the ship relative to the plane...

http://www.freedomship.com/ http://www.freedomship.com/freedomship/images/main3.jpg

A few years ago the passenger ship QE2 ran aground off the East coast of America.The ship was traveling too fast and rode low in the water. Was this due to the Bernouilli principle? And can it happen to ships in deep and shallow water?

The craft, called Space Ship One (SS1), also become the first such craft to break the sound barrier, reaching a top speed of 930 mph (1490 km/h). The flight, exactly 100 years after the Wright brothers made their historic flight, marks a big step to winning the $10 million X Prize for private...

1) use a variety of resources to research the compostion of steel and explain how the compostion of steel affects its proprties, such as its strength and resistance to corrosion. Record this information in chart 2) reseach and explain the chemical methods available to analyze metal materials...

Hi, I'm looking to create an entirely offgrid power system on a very large boat, using a (Bio)Diesel-electric generator and maybe a windmill and submerged generator, as well as some solar but not solar-electric so it doesn't bear mentioning. I'm kind of new to this, so I was wondering what...

This problem here is rather tough (to me). Perhaps you can help: Two ships are moving along a line due east. The trailing vessel has a speed of 64.0 km/h relative to a land based observation point, and the leading ship has a speed of 45.0 km/h relative to the same station. The two ships...

A ship cruises forward at vs = 5 m/s relative to the water. On deck, a man walks diagonally toward the bow such that his path forms an angle theta = 19 degrees with a line perpendicular to the boat's direction of motion. He walks at vm = 3 m/s relative to the boat. I found the speed at...

An enemy ship is on the western side of a mountain island. The enemy ship can maneuver to within 2500 m of the 1800-m-high mountain peak and can shoot projectiles with an initial speed of 250m/s. If the eastern shoreline is horizontally 300m from the peak, what are the distances from the...