La aceleración del punto A está definida por la relación 1.8sin, a kt = - donde a y t se expresan en 2 m / sy segundos, respectivamente, y k = 3 rad / s. Si se sabe que x = 0 y v = 0,6 m / s cuando t = 0, determine la velocidad y la posición del punto A cuando t = 0,5 s.

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Compare the patterns of the two waves shown in the image. which statement is true about these waves?