Potential difference required in an electron microscope to give an electron wavelength of 4. 5 nm will be 0.063 V.
The difference in potential between two points that represents the work involved or the energy released in the transfer of a unit quantity of electricity from one point to the other is called potential difference.
The wavelength of an electron is calculated for a given energy (accelerating voltage) by using the de Broglie relation between the momentum p and the wavelength λ of an electron
lambda = 4.5 nm = 4.5 * 
m
h = 
J s
e = 1.6 * 
C
m = 9.1 * 
kg
Energy = eV
lambda = h / 
= h / 
= 
/ (2m (eV))
V = / (2 m e )
V = 
/ 2 * 9.1 * * 1.6 * * 
V = 0.063 V
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Mass=density*volume
1*40=40g/0.04kg
The friction between the tires and the road causes loss of energy in the form of heat-energy.
<h3>What is kinetic energy?</h3>
The term kinetic energy refers to the energy of an object that is in motion. The pasengers that are sitting at a point possess potential energy. If the bus stops suddenly, the potential energy of the passengers is converted to kinetic energy as they move forward.
Since friction causes loss of energy, the friction between the tires and the road causes looss of energy in the form of heat-energy.
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A., Because speed is constant unless you stop it, or slow down <span />
This is false. they flow west to east
