The seasons are caused by varying length of the day light time, which is a result of the tilt of earth's axis relative to the direction perpendicular to the ecliptic. a. the the varying angle at which the sun's rays strike earth, a result of the tilt of earth's axis relative to the direction perpendicular to the ccliptic. b. the changing sun-earth distance, which is a result of the ellipticity of earth's orbit. d. a and b

Can you use radiation to generate electricity

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.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease