PLZ HELP!!! A rectangular block of lead is 20.00 mm wide, 30.00 mm long, and 45.00 mm deep. If the mass is 306.18 g, calculate the density in g/cm3.

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.

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Why is a noble gas different from other elements?