Determine the kinetic energy of the electron as it leaves the electron gun. Electrons carry this energy to a phosphorescent viewing screen where the microscope's image is form

2. In proton-beam therapy, a high-energy beam of protons is fired at a tumor. The KE of the protons is used to kill cells in the tumor. For one patient, it is desired to deposit 0.1 J of proton energy into a tumor. To create the beam, proton at rest are accelerated through a potential difference of 10 MV (megavolts). a) What is the KE of a single proton fired at the tumor? b) How many protons must be fired at the tumor? ans. 6.25×1010 protons

A proton's speed as it passes point A is 4.00×104 m/s. It follows the trajectory shown in the figure. What is the proton's speed at point B?

Q8. Assume the electric potential at the negatively charged plate is zero. Clearly show all work! a) A charged particle A with charge + 0.020 C and mass 3.0x10-8 kg is at rest as shown next to the positive plate which has electric potential of 120 V. What is its kinetic energy when it reaches the negatively charged plate? What is its speed? b) Another charged particle B with charge + 0.060 C and mass 3.0x10-8 kg is at rest as shown. What is its kinetic energy when it reaches the negatively charged plate? What is its speed? c) A third charged particle C (not shown) with charge 0.070 C and mass 3.0x10-8 kg is at rest in the middle of the two parallel plates. How much work is needed to move it to the positively charged plate? Is the work positive or negative? 0 0 0 0 0 0 0 0

The distance, r, between the proton and electron in the hydrogen atom is about 1010 m. Determine the value of the kinetic energy of the electron. Provide your answer in electron-volts (eV).

Two protons are at a distance of 5.1 ✕ 10-15 m from each other. What is the potential energy of the two protons? Use scientific/exponential notation to input your answer. Eg., 0.0001 can be written as 1.0e-4 or as 1.0E-4. Spaces not allowed.    Answer format: <value><unit> Example: 2.1e1 J

The electrons that are used in an electron microscope are accelerated through a potential difference of 77.0 kV    a) Calculate the speed of the electrons using the Newtonian formula for kinetic energy. b)Calculate the speed of the electrons using the relativistic formula for kinetic energy.

A positively charged ball is dropped into a tube with another positively charged ball at the bottom. It falls a certain distance before turning around. Draw an energy bar chart consistent with this. Take the initial point to be at the top immediately after release and the final point where it turns around. Write an energy equation for this situation, indicating various distances on a sketch. State what your system is and any assumptions you needed to make. Draw qualitatively accurate force diagrams for the dropped ball for the initial and final positions. Write Newton’s 2nd Law equations for the initial and final positions