Team of geologists recorded a series of seismic waves resulting from earthquakes in the area. The geologists measured the wave speeds of four different types of seismic waves between two points from the same earthquake and recorded them in the table.
Wave
w
Wave Speed
5,000 m/s
1,250 m/s
750 m/s
х
Y
Z
3,200 m/s
Which wave corresponds to a primary wave?
OW
ΟΥ
OZ

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

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?