Consider a positronium atom consisting of a positron and electron revolving about their common center of mass half way between them, If such a system were a normal atom (a) How would its emission spectrum compare to that of the hydrogen atom? (b) What would be the radius of the ground state orbit of positronium?

Q: A projectile is fired with an initial velocity of 400 m/s hits a cliff 2000 meter apart determine…

A: range = V0 cos(60) x t  here V0 = 400m/s time of flight is t seconds range = 2000m thus, time (t) =…

Q: A car is approaching at a traffic light at a speed of 15 m per second When the light turns red, the…

A:

Q: Consider a semiconductor bar with w 0.1 mm, d 10 µm and L-5 mm. for B-104 Wb/cm², and a current of 1…

A:

Q: Q2) If the volume charge density in space is specified as -20*Epsilon_not*sqrt(y) MC/m^3;where the…

A:

Q: Q6- In plaster mold we use plaster as expendable material, what are the additional material use in…

A: The additional material which we used in plaster molding is ,Gypsum , water ,Magnesium oxide .