True or false
1.) the greater the frequency of the wave is a particular medium, the greater the wavelength of the wave
2.) radio waves are an example of mechanical waves.
3.) light waves are examples of transverse waves.
4.) the energy of mechanical wave depends on the frequency of the wave.
5.) as the period of a wave increases, the frequency increases.
6.) when a wave reflects from fixed boundary, the only change in the wave is the direction of travel.
7.) two waves cannot occupy the same space at the same time.
8.) if two tuning forks of different frequencies are struck at the same time, you will hear beats as the result of constructive interference followed by destructive interference.

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.

Drag each item into the proper state of matter category.

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit