007 (part 1 of 2) 10.0 points While John is traveling along a straight inter-
state highway, he notices that the mile marker
reads 246 km. John travels until he reaches
the 147 km marker and then retraces his path
to the 172 km marker.
What is John's resultant displacement from
the 246 km marker?
Answer in units of km.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

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.

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c