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مسائل جامعية أرجو الرد لاهنتوا

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بسم الله الرحمن الرحيم
عندي كم مسألة بالفيزياء وأتمنى ألقى حل لهم عندكم
مع العلم سنة أولى طب التخصص
وهذي المسائل لاهنتوا
أبي حلها والشرح لو ممكن
وأنا ماعرفت بصراحة وين أحط الأسئلة بأي قسم
1-
An object of mass 5 kg falls a distance of 5 m and strikes the head of a passerby. If the object comes to a complete stop within 0.1 seconds, calculate the force of impact on the skull. [Assume the acceleration due to gravity (G) = 10 m s-2.].
2-
*Tungsten is commonly used as the anode material in clinical x-ray machines, and has K, L and M atomic ****l energies of 70, 11, and 2 keV respectively. Calculate the wavelengths of the Kα and Kβ x-rays emitted from this material. [Electron charge = 1.6 x 10-19 C, Planck’s constant = 6.62 x 10-34 J s, c = 3 x 108 m s-1, Electron mass = 9.1 x 10-31 kg]

3-
(A) What is the difference between gravitational weight and effective weight?
(B) A 70 kg person measures his/her weight while in an elevator. What will the scales read in Newtons if (I) the elevator is stationary, (ii) the elevator is accelerating upward at 0.3g, and (iii) the elevator cable breaks. [g = 10 m s-2]

4-

Tungsten is commonly used as the anode material in clinical X-ray units and has K, L and M ****l energies of -70 keV, -11 keV and -2 keV respectively. Calculate the wavelengths of the Ka and Kb x-rays produced from such a unit. [e = 1.6 x 10-19 C, h = 6.62 x 10-34 J s, c = 3 x 108 m s-1]

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