In an x-ray tube, an electron with mass 9.1x10-31 kg moves with a velocity Of 9.8x106 ms-. It hits the metal target and rebound with a speed 7.5x104 ms 1 after 5.0x10-6 s. Determine
a) the initial and final momentum of the electron
b) the impulse
c) the average force, F

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."