A.\(f = \frac{1}{{2\pi }}\sqrt {\frac{m}{k}} \).
B.\(f = \frac{1}{{2\pi }}\sqrt {\frac{k}{m}} \).
C.\(f = 2\pi \sqrt {\frac{k}{m}} \).
D.\(f = 2\pi \sqrt {\frac{m}{k}} \).

A.\(\lambda = vf\).
B.\(\lambda = \sqrt {vf} \).
C.\(\lambda = \frac{v}{f}\).
D.\(\lambda = \frac{f}{v}\).

A.1 mm.
B.1,5 mm.
C.1,2 mm.
D.2 mm.

A.3 cm.
B.-3 cm.
C.-6 cm.
D.6 cm.

A.1,52 m/s.
B.1,12 m/s.
C.1,43 m/s.
D.1,27 m/s.

A.350 W.
B.400 W.
C.150 W.
D.200 W.

A.0,91.
B.0,95.
C.0,87.
D.0,99.

A.0
B.\( - \frac{\pi }{6}\).
C.\(\frac{\pi }{6}\).
D.\(\frac{\pi }{2}\).

A.\( \pm 0,034\mu m\)
B.\( \pm 0,039\mu m\)
C.\( \pm 0,26\mu m\)
D.\( \pm 0,019\mu m\)

A.4 cm.
B.5 cm.
C.5π cm.
D.π/3 cm.