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A magnetic field is oriented at an angle = 60 degrees to the normal of a rectangular area. If the magnetic field has a strength of B = 4 *10-3 T and magnetic flux through the surface has a magnitude of 3.2*10-5 T.m2, what is the area of a rectangle?
Two satelities S1 and S2 revolve round a planet in coplanar circular orbits in the same sense. Their periods of revoluions are 1h and 8h respectively. The radius of the orbit of S1 is 10^4km.
A 4 kg dog stands on one end of a 20 kg boat. The dog is initially 6 m from the shore, How far has the boat moved after the dog has walked the 2m
The source of our Sun's energy is a series of fusionreactions. Mainly, four protons become a helium nucleus plus twopositrons, plus two neutrinos (which have no rest mass), plusenergy which is radiated.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 20 MW and lasts 2.3 ns. What is the total energy of the pulse
An ideal gas at 0 degrees Celsius consists of 1.0x10^23 atoms. 16J of thermal energy are added to the gas. What is the new temperature in Degrees Celsius
A uniform disk of mass 0.70 kg and radius 7.0 cm is mounted in the center of a 10 cm axle and spun at 800 rev/min. The axle is after that placed in a horizontal position with one end resting on a pivot. The other end is given an initial horizontal..
The mean lifetime of stationary muons is measured to be 2.2 µs. Find the speed of these cosmic-ray muons relative to Earth
question1the sound level measured in a room by a person watching a movie on a home theatre system varies from 65 db
Once free of this area, it speeds up to 13 m/s in 8 {rm s}. At the edge of town, driver again accelerates, with the same acceleration, for another 16 {rm s} to reach a higher cruising speed.
Two thermal reservoirs are connected by a solid copper bar. The bar is 3 m long, and the temperatures of the reservoirs are 63.0°C and 32.0°C. What is the rate of heat flow through the bar
What is the electric potential energy of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)" Use = 8.85 10 12 for the permittivity of free space.
A diverging lens has a focal length of 71.5 cm. A real object is placed 30.9 cm in front of the lens. How far is the image located from the lens
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