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Electrons are accelerated through a potential difference of 300 V. What is their final de Broglie wavelength?

The kinetic energy of the electron will be equal to the energy what the electric field gives to it.1/2 m v 2 =V QFrom thisv=sqrt(2 V Q/m) De Broglie wavelength:lambda=h/p=h/(mv) We know that h is the planck ...
CB
Answered by Csaba B. • Physics tutor
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Explain how resonance occurs for a driven oscillating system and describe the effect of damping on the resonant frequency.

When the driving force occurs at the natural frequency of the system (the natural frequency being the frequency if the system were oscillating freely) there is maximum energy transfer to the system causing t...
SK
Answered by Saaras K. • Physics tutor
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How does Ice make drinks Ice cold?

Ice, in it's solid form, is at a maximum temperature of zero degrees Celsius. You might expect that a small volume of Ice might cool say a 25 degree drink to somewhere halfway between 0 and 25. This is not o...
IW
Answered by ISAAC W. • Physics tutor
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a) A car weighs 1500kg, if it is travelling at 7m/s, how much kinetic energy does it have?

To determine the kinetic energy of the car, we need to use the formula for kinetic energy. The formula is KE=(1/2)mv^(2) where m is the mass of the object (in kg) and v is the speed of the object (in meters ...
WS
Answered by Wilf S. • Physics tutor
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Define the work function of a metal

The minimum energy required by an electron to escape from a (metal) surface
GR
Answered by George R. • Physics tutor
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