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Sunspots vary in number as a function of time, exhibiting an approximately 11 year cycle. Galileo made the first European observations of sunspots in 1610, and daily observations were begun in Zurich in 1749. At the present time we are well into the 23rd observed cycle. What is the frequency of the sunspot cycle? Give your answer in Hz.
Suppose you cycle 10.0 km to the east and 15.0 km north to get to a shopping mall from home. what is the direction the the pigeon should fly and how far must it travel to get home in the shortest time
A Mercedes-Benz 300SL (m = 1800 kg) is parked on a road that rises 10° above the horizontal. What is the static frictional force that the ground exerts on the tires
a playground merry-go-round of radius r 2.00m has a moment of inertia i 255kgmiddotm2 and is rotating at 9.0revmin
A simple pendulum is constructed from a mass of 2 kg and a massless string of length 3.5 m. The pendulum is pulled 5.5 cm to the right and released to start the motion. What is the period of the pendulum
A prism is made of glass of unknown RI. A parallel beam of light is incident on a face of the prism. The angle of min deviation is measured to be 40 degree. What is the Refractive Index of the prism
A +20 nC point charge is placed on the x axis at x =2.0 m, What is the direction of the electric field at the origin
You are now studying a length of wire that has been coiled up to create a circular coil of 4 turns all arranged compactly, The loop has radius of 0.0240 m and a current of 49.5 A, What is the strength of the magnetic field at the center of the loop
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.209 m and mass 5.65 kg, and two thin crossed rods of mass 9.95 kg each. what should the radius of the disk be
A sample of isotope of 131 Iodine (half-life of 8.04 days) has activity of 5.8 mCi at the time of shipment. How much time has elapsed between the two measurements
a 4400 kg open railroad car coasts along with a constant speed of 5.30ms on a level track. snow begins to fall
a 5.0 kg object is supported by an aluminum wire of length 2.6m and diameter 2.2mm. How much will the wire stretch
A 416 kg car moving at 17.8 m/s hits from behind another car moving at 11.3 m/s in the same direction. If the second car has a mass of 757 kg and a new speed of 13.0 m/s, what is the velocity of the first car after the collision?
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