1. Use the convention symbols (x, ., and →) to indicate the direction of the magnetic field created by electric currents shown in the following diagrams at points A, B, C, D, E, and F. 2. How does the strength of the magnetic field at A compare with that at B, C, D, E, and F in the two situations presented in item 1? 3. The direction of the current is reversed. Sketch the corresponding diagrams, and answer items 1 and 2 again.

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

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 slope of a velocity time graph over any interval of time gives the during that interval