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A Ni-Cu alloy is prepared which has a lattice constant of 0.354 nm. The maximum magnetisation of the alloy is measured as 1.25*10^6 A/m. Assuming no interactions between Ni and Cu atoms, and the magnetisation comes from the all unpaired 3d Ni electrons. Estimate the wt. % Cu in the alloy. Both Ni and Cu have a fcc structure with 4 atoms in a unit cell.
A high-speed drill reaches 2000 rpm in 0.50 s. What is the drill's angular acceleration? Through how many revolutions does it turn during this first 0.50s.
Objective questions based on momentum and force.
Light of wavelength 572 nm illuminates a single 0.72 mm wide slit. What is the width of the central maximum
A system of four particles made of 20 g at (4,0), 30 g at (0,6), 25 g at (-4,3) and 40 g at (-3,2) in the xy-plane, rotate about the z-axis through the centre of the coordinate system. The coordinates are given in units of centimetres. Calculate t..
the ball has a mass of m and is fixed to a rod having a negligible mass. if it is released from rest when theta0
A 117-cm-long, 4.00g string oscillates in its n = 4 mode with a frequency of 200 Hz and a maximum amplitude of 5.50 mm. What is the tension in the string
A penny of mass 3.10 g rests on a small 20.0-g block supported by a spinning disk
A point source of light emits pulses containing 75 watts of power. Determine the intensity 2 meters from the sources
An explosion breaks an object into two pieces, one of which has 1.5times the mass of the other. how much kinetic energy did each piece acquire
A speeder is pulling directly away and increasing his distance from a police car that is moving at 29 meter per second with respect to the ground. Obtain the speeder speed with respect to the ground
Water at ground level is moving at a speed of 1.20 m/sec in a pipe at a pressure of 850 kPa. What is the pressure of the water on the fourth floor
A constant force of 115 N directed upward is applied to a 4.0 kg toy rocket by the rocket's engine. What is the rocket's acceleration
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