Explain the basic principle behind the VLA
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The Very Large Array is a series of radio telescopes that can be linked together using interferometry. This gives the resolution of a very large telescope, equivalent to the maximum separation of the individual telescopes.
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An object weighing 44.1 N hangs from a vertical massless ideal spring
When set in vertical motion, the object obeys the equation y(t) = (6.20 cm) cos[(2.74 rad/s)t - 1.40]. (a) Find the time for this object to vibrate one complete cycle. (b) What are the maximum speed and maximum acceleration of the object. (c) What is the TOTAL distance the object moves through in one cycle. (d) Find the maximum kinetic energy of the object. (e) What is the spring constant of the spring.
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40.0-kg child sits on the other end
The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam? A) 2.12 m B) 1.98 m C) 1.93 m D) 2.07 m E) 2.20 m
A roller skate at rest may have
A) speed. B) velocity. C) momentum. D) energy.
Describe how the different paths of polar wandering helped establish that continents move over geologic time
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