What is true about electromagnetic waves? Select all that apply. * Captionless Image
Electromagnetic waves are faster than mechanical waves.
Electromagnetic waves can travel in vacuum.
Humans can see mechanical waves but not electromagnetic waves.
Electromagnetic waves have higher frequencies than mechanical waves.
Electromagnetic waves are made up of massless particles.

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.

More solar radiation is absorbed by earth’s surface than by

The substances that are necessary for producing of certain hormones and that store and transport vitamins