Life time of B hydron is typically 1.5ps. Assume B hydron is created with the energy of 200 Gev. Estimate how far would it travel before decay. The B hydron gas mass of 5 Gev

Aparticle of mass m is projected with an initial velocity v0 in a direction making an angle α with the horizontal level ground as shown in the figure. the motion of the particle occurs under a uniform gravitational field g pointing downward. (a) write down the lagrangian of the system by using the cartesian coordinates (x, y). (b) is there any cyclic coordinate(s). if so, interpret it (them) physically. (c) find the euler-lagrange equations. find at least one constant of motion. (d) solve the differential equation in part (c) and obtain x and y coordinates of the projectile as a function of time. (e) construct the hamiltonian of the system, h, and write down the hamilton’s equations (canonical equations) of motion.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?