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Suppose you wish to survey 16000 square degrees of the sky to some limiting brightness as fast as possible, but necessarily within some budgetary constraints. Further suppose that the cost of telescopes ~ (diameter of the primary mirror)2.5 and that the cost of a wide-field camera ~ (field of view)3 x (diameter of primary mirror)1.5. For comparison, the costs of a 2m telescope and a camera on that telescope with a field-of-view of 4°x4° are roughly equal. Restrict your choices to 2m, 4m, and 8m diameter telescopes and camera field-of-view to 1°x1°, 2°x 2°, 4°x 4°, and 8°x8°.
What is the fastest way to complete the survey with a single telescope and camera?
The electric motor of a model train accelerates the train from rest to 0.540 m/s in 31.0 ms. Find the average power delivered to the train during its acceleration
What is the freezing point of human blood and What would be your hypothesis why salt water freezes at a lower temperature than pure water
The image is located 3.5 cm from the mirror. (a) If the image is 4X larger than the object. Calculate the distance between the object and the mirror. (b) Calculate the focal length of the mirror.
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, in the direction opposite to the motion of the wave, at 3.5 m/s. how many wave crests pass the boy each second?
A 77.1 kg man is riding an escalator in a shopping mall. What is the work done on the man by the gravitational force
The rotor in a certain electric motor is a flat, rectangular coil with 85 turns of wire and dimensions 2.25 cm by 4.36 cm. The rotor rotates in a uniform magnetic field of 0.800 T. What is the average power of the motor
A 2 kg ball moving towards the West with a speed of 10m/s collides with a 4 kg ball moving towards the North with a speed of 3m/s. Find the velocity of the combination after collision
how fast is the bag moving when the bults exits. If you wish to find the distance traveled using the equation d = 1/2 at2, what value should you use for a.
A typical half life calculated from the simplest such theory, the SU(5) model, is about 10^32 years. How many protons are in all the oceans on earth
At what distance along the central axis of a ring of radius 1.8 cm and uniform charge 66 C is the magnitude of the electric field maximum.
A total charge of Q is deposited on a solid metal sphere of radius R. This charge distributes itself uniformly over the surface, yielding an electrostatic field E~ perpendicular =(sigma / e0) n^ just outside the sphere and E~ = 0 everywhere insid..
A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. how much work W is performed by the engine
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