1. Sebuah gelombang berjalan dengan persamaan y. 0.03 S 21 (t + 2x) dengan xdan y dalam meter dan 1 dalam sekon
tentukan
a. arah rambat dan amplitudo gelombang
b. Frekuensi dan periode gelombang
C . Panjang gelombang
d. cepat rambat gelombang
e. Sudut Fase saat X - Im dan + detik
f. Beda Fase untuk 0.25 in
X = 0,25​

Which statement correctly describes the relationship between frequency and wavelength?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?