Atomic and Nuclear Physics Answers

The electromagnetic force holds the protons and neutrons together in the nucleus of an atom.Is this true or false

A stationary proton is moved from point A, where the potential is 450 V, to point B, where the potential is 125 V.

a.) How much work is done by the electric force?

b.) What is its speed at point B?

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Sodium atoms emit a spectral line with a wavelength in the yellow, 589.6mm. What is the difference in energy between the two energy levels involved in the emission of this spectral line? Answer: 2.1eV

In space far enough from earth’s gravity Superman who had a mass 65kg pushes a space station with 5000 Newton’s of force further away from earth, what will happen to Superman and in what direction.

You throw a ball upwards with an initial velocity of 29 m/s. How high will the ball go before it%92s velocity will be zero and it begins to fall and how much time will it take for the ball to reach that height ?

Calculate the radius and energy of the electron in the nth orbital in the hydrogen atom

One of the uranium 235 nuclear fission reactions in a nuclear reactor is the following: n¹_{0 + U}²³⁵_{92 = Zr}⁹¹ _{40 + La}¹⁴²_{58 + x n}¹_{0 + y e}⁰_{-1 . Determine the number of x neutrons and the number of y neutrons produced by this reaction.}

Derive the expression of the Q = ΔE of a nuclear reaction, hence, determine the Q value and the nature of the reaction F19 (H1,α) O16( 18.998405u, 15.994915u, 4.002603u, 1.007825u are masses of F19, O16, α, H1) respectively.

14) A circular wire loop 45 cm in diameter has resistance 120 Ω and lies in a horizontal plane. A uniform magnetic field points downward making an angle of 60◦with the vertical and in 25 ms it increases linearly from 5.0 mT to 55 mT. Find the magnetic flux through the loop at

(a) the beginning and

(b) the end of the 25 ms period.

(c) What’s the loop current during this time?(

d) Which way does the current flow?

13) A conducting circular ring of radius R1= 3.5 cm carries a current i_1 of 2 A. It’s central axis is the y axis, it is parallel to the x−z plane, and it’s centre is located at (0,3,0) cm. A second circular conducting ring of radiusR2= 5 cm carries a current of 1 A. It’s central axis is also the y axis and it is also parallel to the x−z plane but it’s centre is located at (0,-3,0) cm. A long, thin, straight conducting wireis parallel to the y axis and lies in the x−y plane. It is carrying a current i_w of 5 A and intersects the x axis at x= 10 cm.

(a) What is~B(0,0,0)?

(b) What is the acceleration~a of an electron located at the origin having a velocityof (4×106m/s)ˆk