Calculate Speed of Electron Using Power Supply & Charge Info

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To calculate the speed of an electron emitted from a cathode ray gun connected to a 10kV power supply, one can use the relationship between kinetic energy and electric potential energy. The kinetic energy gained by the electron as it accelerates through the voltage can be expressed as KE = QV, where Q is the charge of the electron and V is the voltage. Given the charge (1.6 x 10^(-19) C) and the mass (9.1 x 10^(-31) kg), the speed can be derived using the formula v = sqrt(2KE/m). No additional information is needed to solve this problem, as the provided data is sufficient to calculate the electron's speed. The final result will reveal the velocity of the electrons as they travel towards the plates.
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Say you have a cathode ray gun and it is connected to a 10kV power supply, which is also connected to negatively charged parallel plates. Can you calculate the speed of the electron(s) which go from the heated coil to the plates, and only information given is voltage of power supply, charge of electron (ㅣQㅣ= 1.6 x 10^(-19) C ) and the mass, which is 9.1 x 10^(-31) kg.

If so, how?
If not, what more information is required to be able to solve this problem?

Thanks!
 
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