Solar cells: semiconductor devices, A solar cell or photo voltaic cell is a...

A solar cell or photo voltaic cell is a semiconductor device that converts photons from the sun into electricity. It can also be defined as a semiconductor electrical junction appa

Determine the frequency heard by the engineer on train, Two trains on separ...

Two trains on separate tracks move toward one another. Train 1has a speed of 140 km/h, train 2 speed of 55.0 km/h. Train 2 blows it shorn, emitting a frequency of 500 Hz. What is t

Cosmological constant, Cosmological constant; Lambda The constant intr...

Cosmological constant; Lambda The constant introduced towards the Einstein field equation, planned to admit static cosmological solutions. During current philosophical view wa

Write down the electromagnetic wave equation, Write down the electromagneti...

Write down the electromagnetic wave equation for free space in terms of electric field.

Define wave, A wave is a disturbance which transmits power and momentum fro...

A wave is a disturbance which transmits power and momentum from one place to the other without the transport of matter.

Force and motion, A truck engine mass 5000kg is pulling a trailer mass 1000...

A truck engine mass 5000kg is pulling a trailer mass 1000kg along a level track at an acceleration of 0.01.Resistance are 10N per 1000for the engine 5N per 1000kg for the trailer.

Determine the magnitude of the horizontal force, The truss shown below supp...

The truss shown below supports is fastened to the supports at A & E.  Each member of the truss is made of the same uniform material that has a weight in kiloNewtons per metre (kN/m

Dielectric material: plastics, Plastics are polymers, meaning they are made...

Plastics are polymers, meaning they are made up of molecules from many different elements. By utilizing different combinations, new polymers are made that can be manipulated from m

Forces and nature,

Determine the acceleration of the car, While travelling in a straight line,...

While travelling in a straight line, a car uniformly alters its speed from 50 kilometres per hour to 110 kilometres per hour in 5 seconds.  The acceleration of the car during