Question1
A piece of aluminium (specific heat 0.910 kJ/kg 0C) of mass 138 g at 74 0 C is dropped into a Styrofoam cup filled with 159 ml water at 20 0 C. What are the final temperatures of water and aluminium?
Question2
An airplane is flying in a horizontal circle at a speed of 47.6 m/s. The 72.9 kg pilot does not want his radial acceleration to exceed 8.1 g. An acceleration of gravity is 9.8 m/s2 .What is the least radius of circular path?
Question3
A 50-turn rectangular coil of dimensions 5.00 cm × 10.0 cm is allowed to fall from a position where B = 0 to a new position where B = 0.500 T and is the magnetic field directed perpendicular to the plane of the coil. Compute magnitude of the average emf that is induced in the coil if the displacement occurs in 0.250 s.