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Define the term universe Name the three celestial coordinates. At what angle is the ecliptic tilted with respect to the celestial equator? What is the physical reason for this? What is the vernal equinox, and what does it have to do with the celestial prime meridian?
The resolution of the eye is eventually limited by the pupil diameter. What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 2.91 mm? Suppose light with a wavelength of =550 nm.
Suppose that an electron is trapped within a small region and the uncertainty in its position is 7.20 multiply.gif 10-15 m, find the minimum uncertainty in the electron's momentum
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
There are 50x10^6 homes in the US. Each home has one light bulb which runs one hour per day. all have 75watt light bulbs. How much energy per year do they use for lighting
10 A of current flows through a wire oriented perpendicular to a magnetic field strength of .2T, What is the magnetic force per unit length on the wire?
A block with mass m1=2.00 kg rests on a frictionless table. It is connected with a light string over a pulley to a hanging block of mass m2=4.00 kg. What is the angular speed of the pulley at this time
A guitar string is 92 cm long and has a mass of 3.8 g. From the bridge to the support post (= L) is 63 cm, What are the frequencies of the fundamental and first two overtones
What is the tangential speed of the 69 kg skier feeling a centripetal force of 226 N
A student standing on a stationary skateboard tosses a textbook with a mass of mb = 1.25 kg to a friend standing in front of him. Calculate for the magnitude of the velocity of the student
The sun rotates around its axis once every 25 earth-days. Assume that the sun's mass is evenly distributed throughout its volume. whats the new period of its rotation
Which of the following objects has the largest kinetic energy?
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