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An ensemble of masers orbit the center of an edge-on spiral galaxy at a particular radius, and are observed at a wavelength of 1.855x10-1 m on the side of the galaxy approaching us, and at 1.863x10-1 m on the side receding from us. What is the orbital speed at the radius at which the masers orbit? Astronomers observed these masers over an interval of one year. What distance does a single maser move during that year? Give your answer in kilometers and in AU. During this period, a maser moving across the line of sight moved through an angle of only 0.000015 arcsec. Calculate the distance to the galaxy.
A set of crash tests consists of running a test car moving at a speed of 13.0 m/s (28.6 m/h) into a solid wall. Calculate the size of the average force which acts on the dummy during that time
A solid weighs 300N. Calculate the pressure exerted by the solid when it is kept on a glass surface, if the area of contact is 700cm2 . solve the numerical.
An object moves in a straight line with a constant acceleration. For a particular one-second interval, its average velocity is 2 m/s. What is the total displacement for the combined intervals
A 2.4 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 20 m above the marble's position on the compressed spring.
compute the magnetic field of a torso with 60 turns if the current in each turn has a magnitude of i0.2a at a distance
Two large, parallel, conducting plates are 16 cm apart and have charges of equal magnitudeand opposite sign on their facing surfaces. An electrostatic forceof3.1*10-15 N acts on anelectron placed any where between the two plates. (Neglectfringing).
A narrow but solid spool of thread has a radius R and mass M. compute what force must you exert on the thread
Two trains, each having a speed of 30 km/h are headed at each other on the same straight track. A bird can fly 60km/h flies off the front of one train when they are 60 km apart and heads directly back to the first trains and so forth, what's the tota..
1. For both electricity and heat, the conduction is via electrons, which in a metal are loosely bound, easy flowing, and easy to start moving. 2. Bound electrons do not exist in materials that are good conductors for both heat and electricity.
A 6" (nominal pipe size) schedule 40 steel pipe has a chamfered entrance and 300 ft. long. what is the total loss of head
A jumbo jet has a mass of 2.3 × 105 kg and a total wing area of 950 m2, what is the difference in pressure between the upper and lower wing surface
Connections to the body for electrocardiography (ECG) and electroencephalography (EEG) are normally made with metal electrodes and conductive gels to ensure good electrical contact. An alternative is the capacitively coupled non contact electrode,
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