Answers:
a)
b)
Explanation:
a) We can solve this knowing the angular momentum is conserved, then:
(1)
Where:
is the initial moment of inertia of the system
is the initial angular velocity
is the final moment of inertia of the system
is the final angular velocity
But first, we have to find and :
(2)
(3)
Where:
is the student's moment of inertia
is the mass of each object
is the initial radius
is the final radius
Then:
(4)
(5)
Substituting the results of (4) and (5) in (1):
(6)
Finding :
(7) This is the final angular velocity
b) The rotational kinetic energy is:
(8)
The change in kinetic energy is:
(9)
Since we already calculated these values, we can solve (9):
(10)
Finally:
size of operation, cooking style of chef, and restaurant menu.
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Answer:D</h2>
Explanation:
Option A:
Surface waves are neither transverse nor longitudinal.They traverse perpendicularly or parallel to the wave's motion along the interface between different media.
Option B:
Transverse waves vibrate perpendicularly to the direction of the propagation of the wave.
Option C:
Sound is a longitudinal wave.Not a transverse wave.
Option D:
Transverse waves don't require a medium for propagation.But they propagate in medium too.
8. ionic bond because lithium is a metal and oxygen is a non metal.
9. covalent bond because sulfur and oxygen are both non metals.
10. covalent
11. ionic