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The identical twins Speedo and Goslo join a migration from theEarth to Planet X. It is 20.0 light-years away in a reference framein which both planets are at rest. The twins, of the same age,depart at the same time on different spacecraft. Speedo's crafttravels steadily at 0.900c, Goslo's at 0.740c. Calculate the age difference between the twins after Goslo'sspacecraft lands on Planet X.
The velocity of the transverse waves produced by an earthquake is 4.94 km/s, while that of the longitudinal waves is 8.8426 km/s. How far away was the earthquake
You wish to reduce the intensity of a beam of 1-MeV gamma rays from 5.12 x 10^7 per second to 2 x 10^5 per second. What thickness of aluminum is required
A particle with charge q is at rest when a magnetic field is suddenly turned on. The field points in the z-direction. What is the direction of the net force acting on the charged particle
Element X decays to element Y with a half-life of 0.77 s. Initially there is a sample of pure X and after 2.31 s there are 7g of Y. What was the mass of the original sample
A straight wire having a length of 14.0 m is bent to form a square. If the wire carries a current of 20.0 A, what is the magnitude of the magnetic field at the center of the square
Your cup of coffee is too hot to drink when served at 95.What is mass of an ice cube, taken from a -19.0 freezer, that will cool your coffee to a pleasant 62.
A gratign spectrometer while in a vaccum on Earth sends 500nm light off at angle 20.0 degrees in first order spectrum, find the index of refration of the mongoian atmosphere
An electric field of magnitude 2210 N/C is applied along the xaxis. Calculate the electric flux through a rectangular plane 0.241m wide and 0.84 m long if the plane is parallel to the yz plane.
the mass of a copper atom is 2.58 10-25 kg and the density of copper is 8 920 kgm3 .a determine the number of atoms in
a drop of liquid of refractive index 1.58 is placed between a plano-convex lens and a plane glass plate which rests on
The E' is an unstable particle, with a mean lifetime on 2.5x10^-10s. What is the minimum uncertainty in this particles energy
a 4 kg box is pushed up a frictionless 30 degree incline with a force of 40n. this 40 n force is parallel to the
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