Aweather map is shown below:

a map of usa is shown with cities san francisco, los angeles, chicago, dallas, miami, and new york marked. a curved line with triangles pointing down is shown between san francisco and los angeles. a curved line with semicircles pointing up is shown on the right between chicago and dallas. slanting z shaped lines are made near los angeles. a key is shown.

based on the weather map, predict the weather in los angeles. explain your answer using complete sentences. will this prediction always come true? why or why not?

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

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.