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A 30-m-long rocket train car is travelling from Los Angeles to New York at 0.8c when a light at the center of the car flashes. When the light reaches the front of the car, it immediately rings a bell. Light reaching the back of the car immediately sounds a siren.
1. Are the bell and siren simultaneous events for a bicyclist waiting to cross the tracks? If not, by how much time?
2. Are the bell and siren simultaneous events for a passenger seated in the car? If not, by how much time?
A spider crawling across a table leaps onto a magazine blocking its path. Compute how thick is the magazine
Three long, straight electrical cables, running north and south, are tightly enclosed in an insulating sheath. One of the cables carries a 21.3 A current southward; the other two carry currents of 17.2 A and 10.8 A northward.
In a very large closed tank, the absolute pressure of the air above the water is 5.22 x 105 Pascal. Compute the speed at which the water leaves the nozzle
A 0.150 T magnetic field B crosses the xy plane perpendicular to the x axis and at an angle of45.0° to the y axis. A square surfacewith side of length 7.00 m lies mostly in the xy plane; however a 1.50 m section of it at one end is bent 90°in the neg..
A cylindrical storage tank has a radius of 1.11 m. When filled to a height of 3.81 m, it holds 15,301 kg of a liquid industrial solvent. What is the density of the solvent
a ball is tied to a string l and suspended from a nail in the wall. the ball is displaced from its equilibrium position
An auto weights 650lb. and is placed 4.00 ft. from one end of a 10.0ft work bench. If the bench is uniform and weights 75.0lb, find what weight must each end of the bench support
A certain digital camera having a lens with focal length 7.50cm focuses on an object 1.90m tall that is 4.70m from the lens. How far must the lens be from the photocells
52 cm3 of gasoline are mixed with 40 cm3 of water. What is the average density of the mixture
An electric field of 10.6 N/C directed due north is superposed on an existing electric field of 15.3 N/C directed due east. What is the magnitude of the resultant field
two containers are at the same temperature. the first contains gas with pressure p1 molecular mass m1 and rms speed
The plane of a flat, circular loop of wire is horizontal. An external magnetic field is directed perpendicular to the plane of the loop. The magnitude of the external magnetic field is increasing with time.
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