Atomic and Nuclear Physics Answers

an isotope of element 102, with a mass number of 253 was produced by bombarding 24096Cm with a projectile, which was absorbed by the target nucleus. write the nuclear reaction and identify the element

A sinusoidal travelling wave in x-direction has amplitude of 15 𝑐𝑚, wavelength of 40 𝑐𝑚 and the

frequency of 8 𝐻𝑧. The vertical displacement at 𝑥 = 0 and 𝑡 = 0 is 15 𝑐𝑚. Find (i) Wave number (ii)

Time period (iii) Wave speed, and (iv) Angular frequency of wave.

how would you relate alchemy to synthesis of new elements?

In an electrically neutral atom, the number of protons equals the number of?

The screen of a pinhole camera is a square, of side 0.16m and it is 0.15m behind the pinhole. The camera is placed11m from a flag staff and positioned. The image occupies three-quaters of the height of screen. What is the height of the flag staff? What is the disadvantage of a pinhole camera compared to a lens camera.

If a Saturn V rocket with an Apollo spacecraft attached had a combined mass of 3.1 × 10⁵ kg and reached a speed of 11 km/s, how much kinetic energy would it then have?

The displacement (in meters) of a particle executing simple harmonic motion at any instant of time is

given by, y = 0.2sin2π(350t − 0.30). Calculate i) the amplitude, ii) wave velocity, iii) wave length,

iv) frequency.

. The activity of a source was measured as follows

Time/days 0 2 3 4 5

Activity 137 63 44 31 22

The background count was 7

i. Explain background count. How does it occur?

ii. Sketch the above graph and determine the half life of the source.

Discuss Thomson’s atomic model ( what was his proposal on how an atom looks like?).

Explain its failures.