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Consider two dimensional square lattice site of side 0.5nm.At what electron
momentum values do the sides of the first Brillouin zone come? What is the
energy of free electron with this momentum.
A car P is 300m behind a car B and both are traveling in the same direction at 25ms–¹. Neglecting the length of the cars.
(i) calculate the acceleration of P.
(ii) it's velocity at the moment of passing B.
(iii) The distance it has travelled in 20s.
Enumerate at least 5 special types of diode. Cite/give the following for each diode:
- Schematic symbol
- Construction
- Characteristic Curve
- Basic operation (including mathematical equation if there's any)
- Applications
A solution of salt water raised the boiling point of water from a 100°C to 102.5°C. What is the molality of the solution? Assume the Kb of water is 0.51°C/m.
A train has a maximum speed 20m/s which it can achieve at an acceleration of 0.25m/s with its brake fully applied, the train has a deceleration of 0.5m/s². What is the shortest time the train can travel between two stations 800m apart if it's stops at both stations?.
Assume that yo-yo drops 1.0 m vertically from its owner's hand at a uniform speed of 0.80 m/s along its string. At the end of the string, it changes direction in 0.10 s and rises toward the owner's hand at a uniform speed of 0.60 m/s. Compute the average acceleration of the yo-yo at the bottom end of the string as it changes direction.
A mass m = 0.1 gram is hanged on a string inside a bus. The bus is accelerating at a constant rate of 5 m/s^2. At what angle will the mass deflect from the vertical? (in degrees)?
A particle at opposition r=I+ 2j+ 3k is acted upon by a force F 2= 4i +5j +6k.
Evaluate the torque experienced by the particle.
A body moves from a position r²=(I + 2j –3k) meter under the influence of constant force F=( 3i +3–k) Newton. Calculate the work done by the force.
A cell has a terminal voltage of 50.0 V for a current of 10.0 A, and 54 V for a current of 6.0 A. Find the external resistance of each cell
#331389 on Nov 2022