Ocean tides are waves that have a period of 12 hours and a speed of 750 km/hr. What is their wavelength?
A)
9000 km
B)
32,400 km
C)
9000 m
D)
32,400 m
E)
2,500 m
Question 2
An object is rotating with an angular momentum of magnitude 20.0 kgm2/s in a direction directly east. A torque of magnitude 10.0 Nm acts in a direction 30 north of east acts on the object for 5.00 s.
What is the angular momentum after the torque has acted? A)
45.0 kgm2/s, 51.3 north of east
B)
68.1 kgm2/s, 21.5 north of east
C)
25.0 kgm2/s, 51.3 north of east
D)
63.3 kgm2/s east
E)
32.0 kgm2/s, 51.3 north of east