Loghan and kyle want to see if the type of ice cream in the freezer affects how hard or soft it is. each time they placed a new brand of ice cream in the freezer, they put it in a different place. they made sure that the freezer temperature was the same each time. they also made sure that the freezer door remained closed after each carton was placed inside it. based on their experiment design, their results should be reliable.

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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.

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical